Class Index - Android SDK

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A

AbortableHttpRequestInterface representing an HTTP request that can be aborted by shutting down the underlying HTTP connection. 
AbsListViewBase class that can be used to implement virtualized lists of items. 
AbsListView.LayoutParamsAbsListView extends LayoutParams to provide a place to hold the view type. 
AbsListView.OnScrollListenerInterface definition for a callback to be invoked when the list or grid has been scrolled. 
AbsListView.RecyclerListenerA RecyclerListener is used to receive a notification whenever a View is placed inside the RecycleBin's scrap heap. 
AbsoluteLayout This class is deprecated. Use FrameLayout, RelativeLayout or a custom layout instead.  
AbsoluteLayout.LayoutParamsPer-child layout information associated with AbsoluteLayout. 
AbsoluteSizeSpan 
AbsSavedStateA Parcelable implementation that should be used by inheritance hierarchies to ensure the state of all classes along the chain is saved. 
AbsSeekBar 
AbsSpinnerAn abstract base class for spinner widgets. 
AbstractAccountAuthenticatorAbstract base class for creating AccountAuthenticators. 
AbstractAuthenticationHandler 
AbstractClientConnAdapterAbstract adapter from operated to managed client connections. 
AbstractCollection<E>Class AbstractCollection is an abstract implementation of the Collection interface. 
AbstractConnPoolAn abstract connection pool. 
AbstractCookieAttributeHandler 
AbstractCookieSpecAbstract cookie specification which can delegate the job of parsing, validation or matching cookie attributes to a number of arbitrary CookieAttributeHandlers. 
AbstractCursorThis is an abstract cursor class that handles a lot of the common code that all cursors need to deal with and is provided for convenience reasons. 
AbstractCursor.SelfContentObserverCursors use this class to track changes others make to their URI. 
AbstractExecutorServiceProvides default implementations of ExecutorService execution methods. 
AbstractHttpClientConvenience base class for HTTP client implementations. 
AbstractHttpClientConnectionAbstract client-side HTTP connection capable of transmitting and receiving data using arbitrary SessionInputBuffer and SessionOutputBuffer 
AbstractHttpEntityAbstract base class for entities. 
AbstractHttpMessageBasic implementation of an HTTP message that can be modified. 
AbstractHttpParamsAbstract base class for parameter collections. 
AbstractHttpServerConnectionAbstract server-side HTTP connection capable of transmitting and receiving data using arbitrary SessionInputBuffer and SessionOutputBuffer 
AbstractInputMethodServiceAbstractInputMethodService provides a abstract base class for input methods. 
AbstractInputMethodService.AbstractInputMethodImplBase class for derived classes to implement their InputMethod interface. 
AbstractInputMethodService.AbstractInputMethodSessionImplBase class for derived classes to implement their InputMethodSession interface. 
AbstractInterruptibleChannelAbstractInterruptibleChannel is the root class for interruptible channels. 
AbstractList<E>AbstractList is an abstract implementation of the List interface, optimized for a backing store which supports random access. 
AbstractMap<K, V>A base class for Map implementations. 
AbstractMap.SimpleEntry<K, V>A key-value mapping with mutable values. 
AbstractMap.SimpleImmutableEntry<K, V>An immutable key-value mapping. 
AbstractMessageParserMessage parser base class. 
AbstractMessageWriter 
AbstractMethodErrorThrown by the virtual machine when an abstract method is called. 
AbstractOwnableSynchronizerA synchronizer that may be exclusively owned by a thread. 
AbstractPooledConnAdapterAbstract adapter from pool entries to managed client connections. 
AbstractPoolEntryA pool entry for use by connection manager implementations. 
AbstractPreferencesThis abstract class is a partial implementation of the abstract class Preferences, which can be used to simplify Preferences provider's implementation. 
AbstractQueue<E>AbstractQueue is an abstract class which implements some of the methods in Queue
AbstractQueuedLongSynchronizerA version of AbstractQueuedSynchronizer in which synchronization state is maintained as a long
AbstractQueuedLongSynchronizer.ConditionObjectCondition implementation for a AbstractQueuedLongSynchronizer serving as the basis of a Lock implementation. 
AbstractQueuedSynchronizerProvides a framework for implementing blocking locks and related synchronizers (semaphores, events, etc) that rely on first-in-first-out (FIFO) wait queues. 
AbstractQueuedSynchronizer.ConditionObjectCondition implementation for a AbstractQueuedSynchronizer serving as the basis of a Lock implementation. 
AbstractSelectableChannelAbstractSelectableChannel is the base implementation class for selectable channels. 
AbstractSelectionKeyAbstractSelectionKey is the base implementation class for selection keys. 
AbstractSelectorAbstractSelector is the base implementation class for selectors. 
AbstractSequentialList<E>AbstractSequentialList is an abstract implementation of the List interface. 
AbstractSessionInputBufferAbstract base class for session input buffers that stream data from a InputStream
AbstractSessionOutputBufferAbstract base class for session output buffers that stream data to an OutputStream
AbstractSet<E>An AbstractSet is an abstract implementation of the Set interface. 
AbstractThreadedSyncAdapterAn abstract implementation of a SyncAdapter that spawns a thread to invoke a sync operation. 
AbstractVerifierAbstract base class for all standard X509HostnameVerifier implementations. 
AbstractWindowedCursorA base class for Cursors that store their data in CursorWindows. 
AccelerateDecelerateInterpolatorAn interpolator where the rate of change starts and ends slowly but accelerates through the middle. 
AccelerateInterpolatorAn interpolator where the rate of change starts out slowly and and then accelerates. 
AccessControlContextAccessControlContext encapsulates the ProtectionDomains on which access control decisions are based. 
AccessControlExceptionAccessControlException is thrown if the access control infrastructure denies protected access due to missing permissions. 
AccessControllerAccessController provides static methods to perform access control checks and privileged operations. 
AccessibilityEventThis class represents accessibility events that are sent by the system when something notable happens in the user interface. 
AccessibilityEventSourceThis interface is implemented by classes source of AccessibilityEvents. 
AccessibilityManagerSystem level service that serves as an event dispatch for AccessibilityEvents. 
AccessibilityServiceAn accessibility service runs in the background and receives callbacks by the system when AccessibilityEvents are fired. 
AccessibilityServiceInfoThis class describes an AccessibilityService
AccessibleObjectAccessibleObject is the superclass of all member reflection classes (Field, Constructor, Method). 
AccountValue type that represents an Account in the AccountManager
AccountAuthenticatorActivityBase class for implementing an Activity that is used to help implement an AbstractAccountAuthenticator. 
AccountAuthenticatorResponseObject used to communicate responses back to the AccountManager  
AccountManagerThis class provides access to a centralized registry of the user's online accounts. 
AccountManagerCallback<V> 
AccountManagerFuture<V>A AccountManagerFuture represents the result of an asynchronous AccountManager call. 
AccountsException 
AclThe Access Control List (ACL) interface definition. 
AclEntryThe Access Control List Entry interface definition. 
AclNotFoundExceptionThe exception, that is thrown when a reference to a non-existent Access Control List (ACL) is made. 
ActivityAn activity is a single, focused thing that the user can do. 
ActivityGroupA screen that contains and runs multiple embedded activities. 
ActivityInfoInformation you can retrieve about a particular application activity or receiver. 
ActivityInstrumentationTestCase<T extends Activity> This class is deprecated. new tests should be written using ActivityInstrumentationTestCase2, which provides more options for configuring the Activity under test  
ActivityInstrumentationTestCase2<T extends Activity>This class provides functional testing of a single activity. 
ActivityManagerInteract with the overall activities running in the system. 
ActivityManager.MemoryInfoInformation you can retrieve about the available memory through getMemoryInfo(ActivityManager.MemoryInfo)
ActivityManager.ProcessErrorStateInfoInformation you can retrieve about any processes that are in an error condition. 
ActivityManager.RecentTaskInfoInformation you can retrieve about tasks that the user has most recently started or visited. 
ActivityManager.RunningAppProcessInfoInformation you can retrieve about a running process. 
ActivityManager.RunningServiceInfoInformation you can retrieve about a particular Service that is currently running in the system. 
ActivityManager.RunningTaskInfoInformation you can retrieve about a particular task that is currently "running" in the system. 
ActivityNotFoundExceptionThis exception is thrown when a call to startActivity(Intent) or one of its variants fails because an Activity can not be found to execute the given Intent. 
ActivityTestCaseThis is common code used to support Activity test cases. 
ActivityUnitTestCase<T extends Activity>This class provides isolated testing of a single activity. 
AdapterAn Adapter object acts as a bridge between an AdapterView and the underlying data for that view. 
AdapterView<T extends Adapter>An AdapterView is a view whose children are determined by an Adapter
AdapterView.AdapterContextMenuInfoExtra menu information provided to the onCreateContextMenu(ContextMenu, View, ContextMenuInfo) callback when a context menu is brought up for this AdapterView. 
AdapterView.OnItemClickListenerInterface definition for a callback to be invoked when an item in this AdapterView has been clicked. 
AdapterView.OnItemLongClickListenerInterface definition for a callback to be invoked when an item in this view has been clicked and held. 
AdapterView.OnItemSelectedListenerInterface definition for a callback to be invoked when an item in this view has been selected. 
AddressA class representing an Address, i.e, a set of Strings describing a location. 
Adler32The Adler-32 class is used to compute the Adler32 checksum from a set of data. 
AlarmClockThe AlarmClock provider contains an Intent action and extras that can be used to start an Activity to set a new alarm in an alarm clock application. 
AlarmManagerThis class provides access to the system alarm services. 
AlertDialogA subclass of Dialog that can display one, two or three buttons. 
AlertDialog.Builder 
AlgorithmParameterGeneratorAlgorithmParameterGenerator is an engine class which is capable of generating parameters for the algorithm it was initialized with. 
AlgorithmParameterGeneratorSpiAlgorithmParameterGeneratorSpi is the Service Provider Interface (SPI) definition for AlgorithmParameterGenerator
AlgorithmParametersAlgorithmParameters is an engine class which provides algorithm parameters. 
AlgorithmParameterSpecThe marker interface for algorithm parameter specifications. 
AlgorithmParametersSpiAlgorithmParametersSpi is the Service Provider Interface (SPI) definition for AlgorithmParameters
AliasActivityStub activity that launches another activity (and then finishes itself) based on information in its component's manifest meta-data. 
AlignmentSpan 
AlignmentSpan.Standard 
AllClientPNamesCollected parameter names for the HttpClient module. 
AllowAllHostnameVerifierThe ALLOW_ALL HostnameVerifier essentially turns hostname verification off. 
AllPermissionAllPermission represents the permission to perform any operation. 
AlphaAnimationAn animation that controls the alpha level of an object. 
AlphabetIndexerA helper class for adapters that implement the SectionIndexer interface. 
AlreadyConnectedExceptionAn AlreadyConnectedException is thrown when an attempt is made to connect a SocketChannel that is already connected. 
AlteredCharSequenceAn AlteredCharSequence is a CharSequence that is largely mirrored from another CharSequence, except that a specified range of characters are mirrored from a different char array instead. 
AnalogClockThis widget display an analogic clock with two hands for hours and minutes. 
AndroidCharacterAndroidCharacter exposes some character properties that are not easily accessed from java.lang.Character. 
AndroidExceptionBase class for all checked exceptions thrown by the Android frameworks. 
AndroidHttpClientSubclass of the Apache DefaultHttpClient that is configured with reasonable default settings and registered schemes for Android, and also lets the user add HttpRequestInterceptor classes. 
AndroidRuntimeExceptionBase class for all unchecked exceptions thrown by the Android frameworks. 
AndroidTestCaseExtend this if you need to access Resources or other things that depend on Activity Context. 
AndroidTestRunner 
AnimatableInterface that drawables suporting animations should implement. 
AnimationAbstraction for an Animation that can be applied to Views, Surfaces, or other objects. 
Animation.AnimationListener

An animation listener receives notifications from an animation. 

Animation.DescriptionUtility class to parse a string description of a size. 
AnimationDrawableAn object used to create frame-by-frame animations, defined by a series of Drawable objects, which can be used as a View object's background. 
AnimationSetRepresents a group of Animations that should be played together. 
AnimationUtilsDefines common utilities for working with animations. 
AnnotatedElementThis interface provides reflective access to annotation information. 
AnnotationAnnotations are simple key-value pairs that are preserved across TextView save/restore cycles and can be used to keep application-specific data that needs to be maintained for regions of text. 
AnnotationDefines the interface implemented by all annotations. 
AnnotationWrapper for a text attribute value which represents an annotation. 
AnnotationFormatErrorIndicates that an annotation in the binary representation of a class is syntactically incorrect and the annotation parser is unable to process it. 
AnnotationTypeMismatchExceptionIndicates that an annotation type has changed since it was compiled or serialized. 
AnticipateInterpolatorAn interpolator where the change starts backward then flings forward. 
AnticipateOvershootInterpolatorAn interpolator where the change starts backward then flings forward and overshoots the target value and finally goes back to the final value. 
AppendableDeclares methods to append characters or character sequences. 
ApplicationBase class for those who need to maintain global application state. 
ApplicationInfoInformation you can retrieve about a particular application. 
ApplicationInfo.DisplayNameComparator 
ApplicationTestCase<T extends Application>This test case provides a framework in which you can test Application classes in a controlled environment. 
AppWidgetHostAppWidgetHost provides the interaction with the AppWidget service for apps, like the home screen, that want to embed AppWidgets in their UI. 
AppWidgetHostViewProvides the glue to show AppWidget views. 
AppWidgetManagerUpdates AppWidget state; gets information about installed AppWidget providers and other AppWidget related state. 
AppWidgetProviderA convenience class to aid in implementing an AppWidget provider. 
AppWidgetProviderInfoDescribes the meta data for an installed AppWidget provider. 
ArcShapeCreates an arc shape. 
ArithmeticExceptionThrown when the an invalid arithmetic operation is attempted. 
ArrayThis class provides static methods to create and access arrays dynamically. 
ArrayA Java representation of the SQL ARRAY type. 
ArrayAdapter<T>A ListAdapter that manages a ListView backed by an array of arbitrary objects. 
ArrayBlockingQueue<E>A bounded blocking queue backed by an array. 
ArrayDeque<E>An implementation of Deque, backed by an array. 
ArrayIndexOutOfBoundsExceptionThrown when the an array is indexed with a value less than zero, or greater than or equal to the size of the array. 
ArrayList<E>ArrayList is an implementation of List, backed by an array. 
ArraysArrays contains static methods which operate on arrays. 
ArrayStoreExceptionThrown when a program attempts to store an element of an incompatible type in an array. 
ArrowKeyMovementMethod 
AssertA set of assert methods. 
AssertionErrorThrown when an assertion has failed. 
AssertionFailedErrorThrown when an assertion failed. 
AssertionFailedErrorThrown when an assertion failed. 
AssetFileDescriptorFile descriptor of an entry in the AssetManager. 
AssetFileDescriptor.AutoCloseInputStreamAn InputStream you can create on a ParcelFileDescriptor, which will take care of calling ParcelFileDescritor.close() for you when the stream is closed. 
AssetFileDescriptor.AutoCloseOutputStreamAn OutputStream you can create on a ParcelFileDescriptor, which will take care of calling ParcelFileDescritor.close() for you when the stream is closed. 
AssetManagerProvides access to an application's raw asset files; see Resources for the way most applications will want to retrieve their resource data. 
AssetManager.AssetInputStream 
AsynchronousCloseExceptionAn AsynchronousCloseException is thrown when the underlying channel for an I/O operation is closed by another thread. 
AsyncPlayerPlays a series of audio URIs, but does all the hard work on another thread so that any slowness with preparing or loading doesn't block the calling thread. 
AsyncQueryHandlerA helper class to help make handling asynchronous ContentResolver queries easier. 
AsyncQueryHandler.WorkerArgs 
AsyncQueryHandler.WorkerHandler 
AsyncTask<Params, Progress, Result>

AsyncTask enables proper and easy use of the UI thread. 

AsyncTask.StatusIndicates the current status of the task. 
AtomicBooleanA boolean value that may be updated atomically. 
AtomicIntegerAn int value that may be updated atomically. 
AtomicIntegerArrayAn int array in which elements may be updated atomically. 
AtomicIntegerFieldUpdater<T>A reflection-based utility that enables atomic updates to designated volatile int fields of designated classes. 
AtomicLongA long value that may be updated atomically. 
AtomicLongArrayA long array in which elements may be updated atomically. 
AtomicLongFieldUpdater<T>A reflection-based utility that enables atomic updates to designated volatile long fields of designated classes. 
AtomicMarkableReference<V>An AtomicMarkableReference maintains an object reference along with a mark bit, that can be updated atomically. 
AtomicReference<V>An object reference that may be updated atomically. 
AtomicReferenceArray<E>An array of object references in which elements may be updated atomically. 
AtomicReferenceFieldUpdater<T, V>A reflection-based utility that enables atomic updates to designated volatile reference fields of designated classes. 
AtomicStampedReference<V>An AtomicStampedReference maintains an object reference along with an integer "stamp", that can be updated atomically. 
AttrThe Attr interface represents an attribute in an Element object. 
AttributedCharacterIteratorExtends the CharacterIterator interface, adding support for iterating over attributes and not only characters. 
AttributedCharacterIterator.AttributeDefines keys for text attributes. 
AttributedStringHolds a string with attributes describing the characters of this string. 
AttributeList This interface is deprecated. This interface has been replaced by the SAX2 Attributes interface, which includes Namespace support. 
AttributeListImpl This class is deprecated. This class implements a deprecated interface, AttributeList; that interface has been replaced by Attributes, which is implemented in the AttributesImpl helper class. 
AttributesThe Attributes class is used to store values for manifest entries. 
AttributesInterface for a list of XML attributes. 
Attributes.NameThe name part of the name/value pairs constituting an attribute as defined by the specification of the JAR manifest. 
Attributes2SAX2 extension to augment the per-attribute information provided though Attributes
Attributes2ImplSAX2 extension helper for additional Attributes information, implementing the Attributes2 interface. 
AttributeSetA collection of attributes, as found associated with a tag in an XML document. 
AttributesImplDefault implementation of the Attributes interface. 
AudioEffectAudioEffect is the base class for controlling audio effects provided by the android audio framework. 
AudioEffect.DescriptorThe effect descriptor contains information on a particular effect implemented in the audio framework:
  • type: UUID corresponding to the OpenSL ES interface implemented by this effect
  • uuid: UUID for this particular implementation
  • connectMode: EFFECT_INSERT or EFFECT_AUXILIARY
  • name: human readable effect name
  • implementor: human readable effect implementor name
The method queryEffects() returns an array of Descriptors to facilitate effects enumeration. 
AudioEffect.OnControlStatusChangeListenerThe OnControlStatusChangeListener interface defines a method called by the AudioEffect when a the control of the effect engine is gained or lost by the application  
AudioEffect.OnEnableStatusChangeListenerThe OnEnableStatusChangeListener interface defines a method called by the AudioEffect when a the enabled state of the effect engine was changed by the controlling application. 
AudioFormatThe AudioFormat class is used to access a number of audio format and channel configuration constants. 
AudioManagerAudioManager provides access to volume and ringer mode control. 
AudioManager.OnAudioFocusChangeListenerInterface definition for a callback to be invoked when the audio focus of the system is updated. 
AudioRecordThe AudioRecord class manages the audio resources for Java applications to record audio from the audio input hardware of the platform. 
AudioRecord.OnRecordPositionUpdateListenerInterface definition for a callback to be invoked when an AudioRecord has reached a notification marker set by setNotificationMarkerPosition(int) or for periodic updates on the progress of the record head, as set by setPositionNotificationPeriod(int)
AudioTrackThe AudioTrack class manages and plays a single audio resource for Java applications. 
AudioTrack.OnPlaybackPositionUpdateListenerInterface definition for a callback to be invoked when the playback head position of an AudioTrack has reached a notification marker or has increased by a certain period. 
AUTHConstants and static helpers related to the HTTP authentication. 
AuthenticationExceptionSignals a failure in authentication process 
AuthenticationHandler 
AuthenticatorAn implementation of this class is able to obtain authentication information for a connection in several ways. 
Authenticator.RequestorTypeEnumeration class for the origin of the authentication request. 
AuthenticatorDescriptionA Parcelable value type that contains information about an account authenticator. 
AuthenticatorException 
AuthParamBean 
AuthParamsThis class implements an adaptor around the HttpParams interface to simplify manipulation of the HTTP authentication specific parameters. 
AuthPermissionGoverns the use of methods in this package and also its subpackages. 
AuthPNamesParameter names for HttpAuth. 
AuthPolicy 
AuthProviderAuthProvider is an abstract superclass for Java Security Provider which provide login and logout. 
AuthScheme

This interface represents an abstract challenge-response oriented authentication scheme. 

AuthSchemeBaseAbstract authentication scheme class that serves as a basis for all authentication schemes supported by HttpClient. 
AuthSchemeFactory 
AuthSchemeRegistryAuthentication scheme registry that can be used to obtain the corresponding authentication scheme implementation for a given type of authorization challenge. 
AuthScopeThe class represents an authentication scope consisting of a host name, a port number, a realm name and an authentication scheme name which Credentials apply to. 
AuthStateThis class provides detailed information about the state of the authentication process. 
AutoCompleteTextView

An editable text view that shows completion suggestions automatically while the user is typing. 

AutoCompleteTextView.ValidatorThis interface is used to make sure that the text entered in this TextView complies to a certain format. 
AutoTextThis class accesses a dictionary of corrections to frequent misspellings. 
AvoidXfermodeAvoidXfermode xfermode will draw the src everywhere except on top of the opColor or, depending on the Mode, draw only on top of the opColor. 
AvoidXfermode.Mode 

B

BackgroundColorSpan 
BackingStoreExceptionAn exception to indicate that an error was encountered while accessing the backing store. 
BackupAgentProvides the central interface between an application and Android's data backup infrastructure. 
BackupAgentHelperA convenient BackupAgent wrapper class that automatically manages heterogeneous data sets within the backup data, each identified by a unique key prefix. 
BackupDataInputProvides the structured interface through which a BackupAgent reads information from the backup data set, via its onRestore() method. 
BackupDataInputStreamProvides an InputStream-like interface for accessing an entity's data during a restore operation. 
BackupDataOutputProvides the structured interface through which a BackupAgent commits information to the backup data set, via its onBackup() method. 
BackupHelperDefines the calling interface that BackupAgentHelper uses when dispatching backup and restore operations to the installed helpers. 
BackupManagerThe interface through which an application interacts with the Android backup service to request backup and restore operations. 
BadPaddingExceptionThe exception that is thrown when a padding mechanism is expected for the input data, but the input data does not have the proper padding bytes. 
BadParcelableExceptionThe object you are calling has died, because its hosting process no longer exists. 
Base64Utilities for encoding and decoding the Base64 representation of binary data. 
Base64InputStreamAn InputStream that does Base64 decoding on the data read through it. 
Base64OutputStreamAn OutputStream that does Base64 encoding on the data written to it, writing the resulting data to another OutputStream. 
BaseAdapterCommon base class of common implementation for an Adapter that can be used in both ListView (by implementing the specialized ListAdapter interface} and Spinner (by implementing the specialized SpinnerAdapter interface. 
BaseColumns 
BaseExpandableListAdapterBase class for a ExpandableListAdapter used to provide data and Views from some data to an expandable list view. 
BaseInputConnectionBase class for implementors of the InputConnection interface, taking care of most of the common behavior for providing a connection to an Editable. 
BaseKeyListener 
BaseTestRunnerBase class for all test runners. 
BasicClientCookieHTTP "magic-cookie" represents a piece of state information that the HTTP agent and the target server can exchange to maintain a session. 
BasicClientCookie2HTTP "magic-cookie" represents a piece of state information that the HTTP agent and the target server can exchange to maintain a session as specified by RFC2965. 
BasicCommentHandler 
BasicCookieStoreDefault implementation of CookieStore 
BasicCredentialsProviderDefault implementation of CredentialsProvider 
BasicDomainHandler 
BasicEofSensorWatcherBasic implementation of EofSensorWatcher
BasicExpiresHandler 
BasicHeaderRepresents an HTTP header field. 
BasicHeaderElementOne element of an HTTP header's value. 
BasicHeaderElementIteratorBasic implementation of a HeaderElementIterator
BasicHeaderIteratorBasic implementation of a HeaderIterator
BasicHeaderValueFormatterBasic implementation for formatting header value elements. 
BasicHeaderValueParserBasic implementation for parsing header values into elements. 
BasicHttpContextDefault implementation of the HttpContext
BasicHttpEntityA generic streamed entity being received on a connection. 
BasicHttpEntityEnclosingRequestBasic implementation of a request with an entity that can be modified. 
BasicHttpParamsThis class represents a collection of HTTP protocol parameters. 
BasicHttpProcessorKeeps lists of interceptors for processing requests and responses. 
BasicHttpRequestBasic implementation of an HTTP request that can be modified. 
BasicHttpResponseBasic implementation of an HTTP response that can be modified. 
BasicLineFormatterInterface for formatting elements of the HEAD section of an HTTP message. 
BasicLineParserBasic parser for lines in the head section of an HTTP message. 
BasicListHeaderIteratorImplementation of a HeaderIterator based on a List
BasicManagedEntityAn entity that releases a connection
BasicMaxAgeHandler 
BasicNameValuePairA simple class encapsulating an attribute/value pair. 
BasicPathHandler 
BasicPermissionBasicPermission is the common base class of all permissions which have a name but no action lists. 
BasicPooledConnAdapterA connection wrapper and callback handler. 
BasicPoolEntryBasic implementation of a connection pool entry. 
BasicPoolEntryRefA weak reference to a BasicPoolEntry
BasicRequestLineThe first line of an HttpRequest
BasicResponseHandlerA ResponseHandler that returns the response body as a String for successful (2xx) responses. 
BasicRouteDirectorBasic implementation of an HttpRouteDirector
BasicScheme

Basic authentication scheme as defined in RFC 2617. 

BasicSchemeFactory 
BasicSecureHandler 
BasicStatusLineRepresents a status line as returned from a HTTP server. 
BasicTokenIteratorBasic implementation of a TokenIterator
BasicUserPrincipalBasic user principal used for HTTP authentication 
BassBoostBass boost is an audio effect to boost or amplify low frequencies of the sound. 
BassBoost.OnParameterChangeListenerThe OnParameterChangeListener interface defines a method called by the BassBoost when a parameter value has changed. 
BassBoost.SettingsThe Settings class regroups all bass boost parameters. 
BatchUpdateExceptionThis exception is thrown if a problem occurs during a batch update operation. 
BatteryManagerThe BatteryManager class contains strings and constants used for values in the ACTION_BATTERY_CHANGED Intent. 
BestMatchSpec'Meta' cookie specification that selects a cookie policy depending on the format of the cookie(s) 
BestMatchSpecFactory 
BidiProvides the Unicode Bidirectional Algorithm. 
BigDecimalThis class represents immutable integer numbers of arbitrary length. 
BigIntegerAn immutable signed integer of arbitrary magnitude. 
BinderBase class for a remotable object, the core part of a lightweight remote procedure call mechanism defined by IBinder
BindExceptionA BindException is thrown when a process cannot bind a local address/port, either because it is already bound or reserved by the OS. 
Bitmap 
Bitmap.CompressFormatSpecifies the known formats a bitmap can be compressed into  
Bitmap.Config 
BitmapDrawableA Drawable that wraps a bitmap and can be tiled, stretched, or aligned. 
BitmapFactoryCreates Bitmap objects from various sources, including files, streams, and byte-arrays. 
BitmapFactory.Options 
BitmapShader 
BitSetThe BitSet class implements a bit field. 
BlobA Java interface representing the SQL BLOB type. 
BlockingDeque<E>A Deque that additionally supports blocking operations that wait for the deque to become non-empty when retrieving an element, and wait for space to become available in the deque when storing an element. 
BlockingQueue<E>A Queue that additionally supports operations that wait for the queue to become non-empty when retrieving an element, and wait for space to become available in the queue when storing an element. 
BluetoothAdapterRepresents the local device Bluetooth adapter. 
BluetoothClassRepresents a Bluetooth class, which describes general characteristics and capabilities of a device. 
BluetoothClass.DeviceDefines all device class constants. 
BluetoothClass.Device.MajorDefines all major device class constants. 
BluetoothClass.ServiceDefines all service class constants. 
BluetoothDeviceRepresents a remote Bluetooth device. 
BluetoothServerSocketA listening Bluetooth socket. 
BluetoothSocketA connected or connecting Bluetooth socket. 
BlurMaskFilterThis takes a mask, and blurs its edge by the specified radius. 
BlurMaskFilter.Blur 
BooleanThe wrapper for the primitive type boolean
BoringLayoutA BoringLayout is a very simple Layout implementation for text that fits on a single line and is all left-to-right characters. 
BoringLayout.Metrics 
BounceInterpolatorAn interpolator where the change bounces at the end. 
BreakIteratorLocates boundaries in text. 
BroadcastReceiverBase class for code that will receive intents sent by sendBroadcast(). 
BrokenBarrierExceptionException thrown when a thread tries to wait upon a barrier that is in a broken state, or which enters the broken state while the thread is waiting. 
Browser 
Browser.BookmarkColumns 
Browser.SearchColumns 
BrowserCompatHostnameVerifierThe HostnameVerifier that works the same way as Curl and Firefox. 
BrowserCompatSpecCookie specification that strives to closely mimic (mis)behavior of common web browser applications such as Microsoft Internet Explorer and Mozilla FireFox. 
BrowserCompatSpecFactory 
BufferA buffer is a list of elements of a specific primitive type. 
BufferedHeaderThis class represents a raw HTTP header whose content is parsed 'on demand' only when the header value needs to be consumed. 
BufferedHttpEntityA wrapping entity that buffers it content if necessary. 
BufferedInputStreamWraps an existing InputStream and buffers the input. 
BufferedOutputStreamWraps an existing OutputStream and buffers the output. 
BufferedReaderWraps an existing Reader and buffers the input. 
BufferedWriterWraps an existing Writer and buffers the output. 
BufferOverflowExceptionA BufferOverflowException is thrown when elements are written to a buffer but there is not enough remaining space in the buffer. 
BufferUnderflowExceptionA BufferUnderflowException is thrown when elements are read from a buffer but there are not enough remaining elements in the buffer. 
BuildInformation about the current build, extracted from system properties. 
Build.VERSIONVarious version strings. 
Build.VERSION_CODESEnumeration of the currently known SDK version codes. 
BulletSpan 
BundleA mapping from String values to various Parcelable types. 
ButtonRepresents a push-button widget. 
ByteThe wrapper for the primitive type byte
ByteArrayBufferA resizable byte array. 
ByteArrayEntityAn entity whose content is retrieved from a byte array. 
ByteArrayInputStreamA specialized InputStream for reading the contents of a byte array. 
ByteArrayOutputStreamA specialized OutputStream for class for writing content to an (internal) byte array. 
ByteBufferA buffer for bytes. 
ByteChannelA ByteChannel is both readable and writable. 
ByteOrderDefines byte order constants. 

C

CacheManagerThe class CacheManager provides the persistent cache of content that is received over the network. 
CacheManager.CacheResultThis class represents a resource retrieved from the HTTP cache. 
CacheRequestCacheRequest is a kind of channel for storing resource data in the ResponseCache
CacheResponseA response cache entry. 
CalendarCalendar is an abstract base class for converting between a Date object and a set of integer fields such as YEAR, MONTH, DAY, HOUR, and so on. 
Callable<V>A task that returns a result and may throw an exception. 
CallableStatementAn interface used to call Stored Procedures
CallbackDefines an empty base interface for all Callbacks used during authentication. 
CallbackHandlerNeeds to be implemented by classes that want to handle authentication Callbacks. 
CallLogThe CallLog provider contains information about placed and received calls. 
CallLog.CallsContains the recent calls. 
CamcorderProfileThe CamcorderProfile class is used to retrieve the predefined camcorder profile settings for camcorder applications. 
Camera 
CameraThe Camera class is used to set image capture settings, start/stop preview, snap pictures, and retrieve frames for encoding for video. 
Camera.AutoFocusCallbackCallback interface used to notify on completion of camera auto focus. 
Camera.CameraInfoInformation about a camera  
Camera.ErrorCallbackCallback interface for camera error notification. 
Camera.OnZoomChangeListenerCallback interface for zoom changes during a smooth zoom operation. 
Camera.ParametersCamera service settings. 
Camera.PictureCallbackCallback interface used to supply image data from a photo capture. 
Camera.PreviewCallbackCallback interface used to deliver copies of preview frames as they are displayed. 
Camera.ShutterCallbackCallback interface used to signal the moment of actual image capture. 
Camera.SizeImage size (width and height dimensions). 
CameraProfileThe CameraProfile class is used to retrieve the pre-defined still image capture (jpeg) quality levels (0-100) used for low, medium, and high quality settings in the Camera application. 
CancellationExceptionException indicating that the result of a value-producing task, such as a FutureTask, cannot be retrieved because the task was cancelled. 
CancelledKeyExceptionA CancelledKeyException is thrown when an invalid selection key is used. 
CanvasThe Canvas class holds the "draw" calls. 
Canvas.EdgeType 
Canvas.VertexMode 
CDATASectionCDATA sections are used to escape blocks of text containing characters that would otherwise be regarded as markup. 
CdmaCellLocationRepresents the cell location on a CDMA phone. 
CellLocationAbstract class that represents the location of the device.  
Certificate This interface is deprecated. Replaced by behavior in java.security.cert 
CertificateAbstract class to represent identity certificates. 
CertificateAbstract class to represent identity certificates. 
Certificate.CertificateRepThe alternate Serializable class to be used for serialization and deserialization of Certificate objects. 
CertificateEncodingExceptionThe exception that is thrown when an error occurs while a Certificate is being encoded. 
CertificateEncodingExceptionThe exception that is thrown when an error occurs while a Certificate is being encoded. 
CertificateExceptionThe base class for all Certificate related exceptions. 
CertificateExceptionThe base class for all Certificate related exceptions. 
CertificateExpiredExceptionThe exception that is thrown when a Certificate has expired. 
CertificateExpiredExceptionThe exception that is thrown when a Certificate has expired. 
CertificateFactoryThis class implements the functionality of a certificate factory algorithm, relying on parsing a stream of bytes. 
CertificateFactorySpiThis class defines the Service Provider Interface (SPI) for the CertificateFactory class. 
CertificateNotYetValidExceptionThe exception that is thrown when a Certificate is not yet valid or will not yet be valid on a specified date. 
CertificateNotYetValidExceptionThe exception that is thrown when a Certificate is not yet valid. 
CertificateParsingExceptionThe exception that is thrown when a Certificate can not be parsed. 
CertificateParsingExceptionThe exception that is thrown when a Certificate can not be parsed. 
CertPathAn immutable certificate path that can be validated. 
CertPath.CertPathRepThe alternate Serializable class to be used for serialization and deserialization on CertPath objects. 
CertPathBuilderThis class implements the functionality of a builder for an unverified Certification Paths from a specified certificate to a trust anchor. 
CertPathBuilderExceptionThe exception that is thrown when a CertPathBuilder method fails. 
CertPathBuilderResultThe interface for results generated by build(CertPathParameters)
CertPathBuilderSpiThe Service Provider Interface (SPI) for the CertPathBuilder class to be implemented by security providers. 
CertPathParametersThe interface specification for certification path algorithm parameters. 
CertPathTrustManagerParametersCertification path parameters to provide to certification path based TrustManager
CertPathValidatorThis class provides the functionality for validating certification paths (certificate chains) establishing a trust chain from a certificate to a trust anchor. 
CertPathValidatorExceptionThe exception that is thrown when a certification path (or certificate chain) cannot be validated. 
CertPathValidatorResultThe interface specification for certification path validation results. 
CertPathValidatorSpiThe Service Provider Interface (SPI) for the CertPathValidator class to be implemented by security providers. 
CertSelectorThe interface specification to determine whether a Certificate meets some criteria. 
CertStoreThis class provides the functionality to retrieve Certificates and CRLs from a read-only repository. 
CertStoreExceptionThe exception that is thrown when an access to a CertStore fails. 
CertStoreParametersThe marker interface specifying the parameters used to initialize a CertStore instance. 
CertStoreSpiThe Service Provider Interface (SPI) definition for the CertStore class to be implemented by security providers. 
ChannelA channel is a conduit to I/O services covering such items as files, sockets, hardware devices, I/O ports or some software component. 
ChannelsThis class provides several utilities to get I/O streams from channels. 
CharacterThe wrapper for the primitive type char
Character.Subset 
Character.UnicodeBlockRepresents a block of Unicode characters, as defined by the Unicode 4.0.1 specification. 
CharacterCodingExceptionA CharacterCodingException is thrown when an encoding or decoding error occurs. 
CharacterDataThe CharacterData interface extends Node with a set of attributes and methods for accessing character data in the DOM. 
CharacterIteratorAn interface for the bidirectional iteration over a group of characters. 
CharacterPickerDialogDialog for choosing accented characters related to a base character. 
CharacterStyleThe classes that affect character-level text formatting extend this class. 
CharArrayBufferThis is used for copyStringToBuffer(int, CharArrayBuffer)  
CharArrayBufferA resizable char array. 
CharArrayReaderA specialized Reader for reading the contents of a char array. 
CharArrayWriterA specialized Writer for class for writing content to an (internal) char array. 
CharBufferA buffer of chars. 
CharConversionExceptionThe top level class for character conversion exceptions. 
CharSequenceThis interface represents an ordered set of characters and defines the methods to probe them. 
CharsetA charset is a named mapping between Unicode characters and byte sequences. 
CharsetDecoderA converter that can convert a byte sequence from a charset into a 16-bit Unicode character sequence. 
CharsetEncoderTransforms a sequence of 16-bit Java characters to a byte sequence in some encoding. 
CharsetProviderThe service provider class for character sets. 
CheckableDefines an extension for views that make them checkable. 
CheckBox

A checkbox is a specific type of two-states button that can be either checked or unchecked. 

CheckBoxPreferenceA Preference that provides checkbox widget functionality. 
CheckedInputStreamThe CheckedInputStream class is used to maintain a checksum at the same time as the data, on which the checksum is computed, is read from a stream. 
CheckedOutputStreamThe CheckedOutputStream class is used to maintain a running checksum of all data written to a stream. 
CheckedTextViewAn extension to TextView that supports the Checkable interface. 
ChecksumHolds information about a checksum which was computed with the methods implementing a checksum algorithm. 
ChoiceFormatReturns a fixed string based on a numeric value. 
ChronometerClass that implements a simple timer. 
Chronometer.OnChronometerTickListenerA callback that notifies when the chronometer has incremented on its own. 
ChunkedInputStreamImplements chunked transfer coding. 
ChunkedOutputStreamImplements chunked transfer coding. 
CipherThis class provides access to implementations of cryptographic ciphers for encryption and decryption. 
CipherInputStreamThis class wraps an InputStream and a cipher so that read() methods return data that are read from the underlying InputStream and processed by the cipher. 
CipherOutputStreamThis class wraps an output stream and a cipher so that write methods send the data through the cipher before writing them to the underlying output stream. 
CipherSpiThis class defines the Service Provider Interface (SPI) for cryptographic ciphers. 
CircularRedirectExceptionSignals a circular redirect 
Class<T>The in-memory representation of a Java class. 
ClassCastExceptionThrown when a program attempts to cast a an object to a type with which it is not compatible. 
ClassCircularityErrorThrown when the virtual machine notices that an attempt is made to load a class which would directly or indirectly inherit from one of its subclasses. 
ClassFormatErrorThrown by a class loader when a class file has an illegal format or if the data that it contains can not be interpreted as a class. 
ClassLoaderLoads classes and resources from a repository. 
ClassNotFoundExceptionThrown when a class loader is unable to find a class. 
ClickableSpanIf an object of this type is attached to the text of a TextView with a movement method of LinkMovementMethod, the affected spans of text can be selected. 
ClientConnectionManagerManagement interface for client connections
ClientConnectionManagerFactoryA factory for creating new ClientConnectionManager instances. 
ClientConnectionOperatorInterface for opening connections
ClientConnectionRequestEncapsulates a request for a ManagedClientConnection
ClientContextContext attribute names for client. 
ClientContextConfigurer 
ClientCookieClientCookie extends the standard Cookie interface with additional client specific functionality such ability to retrieve original cookie attributes exactly as they were specified by the origin server. 
ClientInfoStatusAn enumeration to describe the reason why a property cannot be set by calling Connection.setClientInfo. 
ClientParamBean 
ClientParamsStackRepresents a stack of parameter collections. 
ClientPNamesParameter names for the HttpClient module. 
ClientProtocolExceptionSignals an error in the HTTP protocol. 
ClipboardManagerInterface to the clipboard service, for placing and retrieving text in the global clipboard. 
ClipDrawableA Drawable that clips another Drawable based on this Drawable's current level value. 
ClobA Java interface mapping for the SQL CLOB type. 
CloneableThis (empty) interface must be implemented by all classes that wish to support cloning. 
CloneNotSupportedExceptionThrown when a program attempts to clone an object which does not support the Cloneable interface. 
CloneUtilsA collection of utilities to workaround limitations of Java clone framework. 
CloseableDefines an interface for classes that can (or need to) be closed once they are not used any longer. 
ClosedByInterruptExceptionA ClosedByInterruptException is thrown when a thread is interrupted in a blocking I/O operation. 
ClosedChannelExceptionA ClosedChannelException is thrown when a channel is closed for the type of operation attempted. 
ClosedSelectorExceptionA ClosedSelectorException is thrown when a selector is closed and an I/O operation is attempted. 
CoderMalfunctionErrorA CoderMalfunctionError is thrown when the encoder/decoder is malfunctioning. 
CoderResultUsed to indicate the result of encoding/decoding. 
CodeSignerCodeSigner represents a signer of code. 
CodeSourceCodeSource encapsulates the location from where code is loaded and the certificates that were used to verify that code. 
CodingErrorActionUsed to indicate what kind of actions to take in case of encoding/decoding errors. 
CollationElementIteratorCreated by a RuleBasedCollator to iterate through a string. 
CollationKeyRepresents a string under the rules of a specific Collator object. 
CollatorPerforms locale-sensitive string comparison. 
Collection<E>Collection is the root of the collection hierarchy. 
CollectionCertStoreParametersThe parameters to initialize a Collection type CertStore instance. 
CollectionsCollections contains static methods which operate on Collection classes. 
ColorThe Color class defines methods for creating and converting color ints. 
ColorDrawableA specialized Drawable that fills the Canvas with a specified color, with respect to the clip region. 
ColorFilter 
ColorMatrix5x4 matrix for transforming the color+alpha components of a Bitmap. 
ColorMatrixColorFilter 
ColorStateListLets you map View state sets to colors. 
CommentThis interface inherits from CharacterData and represents the content of a comment, i.e., all the characters between the starting ' <!--' and ending '-->'. 
CommonDataSourceInterface that defines the methods which are common between DataSource, XADataSource and ConnectionPoolDataSource. 
Comparable<T>This interface should be implemented by all classes that wish to define a natural order of their instances. 
Comparator<T>A Comparator is used to compare two objects to determine their ordering with respect to each other. 
ComparisonFailureThrown when an assert equals for Strings failed. 
ComparisonFailureThrown when an assert equals for Strings failed. 
CompilerPlaceholder class for environments which explicitly manage the action of a Just In Time (JIT) compiler. 
CompletionInfoInformation about a single text completion that an editor has reported to an input method. 
CompletionService<V>A service that decouples the production of new asynchronous tasks from the consumption of the results of completed tasks. 
ComponentCallbacksThe set of callback APIs that are common to all application components (Activity, Service, ContentProvider, and Application). 
ComponentInfoBase class containing information common to all application components (ActivityInfo, ServiceInfo). 
ComponentNameIdentifier for a specific application component (Activity, Service, BroadcastReceiver, or ContentProvider) that is available. 
ComposePathEffect 
ComposeShaderA subclass of shader that returns the coposition of two other shaders, combined by an Xfermode subclass. 
CompoundButton

A button with two states, checked and unchecked. 

CompoundButton.OnCheckedChangeListenerInterface definition for a callback to be invoked when the checked state of a compound button changed. 
ConcurrentHashMap<K, V>A hash table supporting full concurrency of retrievals and adjustable expected concurrency for updates. 
ConcurrentLinkedQueue<E>An unbounded thread-safe queue based on linked nodes. 
ConcurrentMap<K, V>A Map providing additional atomic putIfAbsent, remove, and replace methods. 
ConcurrentModificationExceptionAn ConcurrentModificationException is thrown when a Collection is modified and an existing iterator on the Collection is used to modify the Collection as well. 
ConcurrentNavigableMap<K, V>A ConcurrentMap supporting NavigableMap operations, and recursively so for its navigable sub-maps. 
ConcurrentSkipListMap<K, V>A scalable concurrent ConcurrentNavigableMap implementation. 
ConcurrentSkipListSet<E>A scalable concurrent NavigableSet implementation based on a ConcurrentSkipListMap
ConditionCondition factors out the Object monitor methods (wait, notify and notifyAll) into distinct objects to give the effect of having multiple wait-sets per object, by combining them with the use of arbitrary Lock implementations. 
ConditionVariableClass that implements the condition variable locking paradigm. 
ConfigBuild configuration. The constants in this class vary depending on release vs. debug build.  
ConfigurationThis class describes all device configuration information that can impact the resources the application retrieves. 
ConfigurationInfoInformation you can retrieve about hardware configuration preferences declared by an application. 
ConnConnectionParamBeanAllows for setting parameters relating to connections on HttpParams
ConnConnectionPNamesParameter names for connections in HttpConn. 
ConnectExceptionA ConnectException is thrown if a connection cannot be established to a remote host on a specific port. 
ConnectionA connection represents a link from a Java application to a database. 
ConnectionClosedExceptionIndicates that a connection has been closed. 
ConnectionEventSent when specific events happen on a PooledConnection object. 
ConnectionEventListenerAn interface used to receive events generated by a PooledConnection
ConnectionKeepAliveStrategyInterface for deciding how long a connection can remain idle before being reused. 
ConnectionPendingExceptionA ConnectionPendingException is thrown when an attempt is made to connect a SocketChannel that has a non-blocking connection already underway. 
ConnectionPoolDataSourceAn interface for the creation of ConnectionPoolDataSource objects. 
ConnectionPoolTimeoutExceptionA timeout while waiting for an available connection from a connection manager. 
ConnectionReleaseTriggerInterface for releasing a connection. 
ConnectionReuseStrategyInterface for deciding whether a connection should be kept alive. 
ConnectivityManagerClass that answers queries about the state of network connectivity. 
ConnectTimeoutExceptionA timeout while connecting to an HTTP server or waiting for an available connection from an HttpConnectionManager. 
ConnManagerParamBeanAllows for setting parameters relating to connection managers on HttpParams
ConnManagerParamsThis class represents a collection of HTTP protocol parameters applicable to client-side connection managers
ConnManagerPNamesParameter names for connection managers in HttpConn. 
ConnPerRouteThis interface is intended for looking up maximum number of connections allowed for for a given route. 
ConnPerRouteBeanThis class maintains a map of HTTP routes to maximum number of connections allowed for those routes. 
ConnPoolByRouteA connection pool that maintains connections by route. 
ConnRouteParamBeanAllows for setting parameters relating to connection routes on HttpParams
ConnRouteParamsAn adaptor for accessing route related parameters in HttpParams
ConnRoutePNamesParameter names for routing in HttpConn. 
ConsoleProvides access to the console, if available. 
ConsoleHandlerA handler that writes log messages to the standard output stream System.err
ConsoleMessagePublic class representing a JavaScript console message from WebCore. 
ConsoleMessage.MessageLevel 
Constructor<T>This class represents a constructor. 
Contacts This class is deprecated. The APIs have been superseded by ContactsContract. The newer APIs allow access multiple accounts and support aggregation of similar contacts. These APIs continue to work but will only return data for the first Google account created, which matches the original behavior.  
Contacts.ContactMethods This class is deprecated. see ContactsContract  
Contacts.ContactMethodsColumns This interface is deprecated. see ContactsContract  
Contacts.Extensions This class is deprecated. see ContactsContract  
Contacts.ExtensionsColumns This interface is deprecated. see ContactsContract  
Contacts.GroupMembership This class is deprecated. see ContactsContract  
Contacts.Groups This class is deprecated. see ContactsContract  
Contacts.GroupsColumns This interface is deprecated. see ContactsContract  
Contacts.Intents This class is deprecated. see ContactsContract  
Contacts.Intents.Insert This class is deprecated. see ContactsContract  
Contacts.Intents.UI This class is deprecated. see ContactsContract  
Contacts.OrganizationColumns This interface is deprecated. see ContactsContract  
Contacts.Organizations This class is deprecated. see ContactsContract  
Contacts.People This class is deprecated. see ContactsContract  
Contacts.People.ContactMethods This class is deprecated. see ContactsContract  
Contacts.People.Extensions This class is deprecated. see ContactsContract  
Contacts.People.Phones This class is deprecated. see ContactsContract  
Contacts.PeopleColumns This interface is deprecated. see ContactsContract  
Contacts.Phones This class is deprecated. see ContactsContract  
Contacts.PhonesColumns This interface is deprecated. see ContactsContract  
Contacts.Photos This class is deprecated. see ContactsContract  
Contacts.PhotosColumns This interface is deprecated. see ContactsContract  
Contacts.PresenceColumns This interface is deprecated. see ContactsContract  
Contacts.Settings This class is deprecated. see ContactsContract  
Contacts.SettingsColumns This interface is deprecated. see ContactsContract  
ContactsContract

The contract between the contacts provider and applications. 

ContactsContract.AggregationExceptions

Constants for the contact aggregation exceptions table, which contains aggregation rules overriding those used by automatic aggregation. 

ContactsContract.BaseSyncColumnsGeneric columns for use by sync adapters. 
ContactsContract.CommonDataKindsContainer for definitions of common data types stored in the ContactsContract.Data table. 
ContactsContract.CommonDataKinds.BaseTypesThe base types that all "Typed" data kinds support. 
ContactsContract.CommonDataKinds.CommonColumnsColumns common across the specific types. 
ContactsContract.CommonDataKinds.Email

A data kind representing an email address. 

ContactsContract.CommonDataKinds.Event

A data kind representing an event. 

ContactsContract.CommonDataKinds.GroupMembership

Group Membership. 

ContactsContract.CommonDataKinds.Im

A data kind representing an IM address

You can use all columns defined for ContactsContract.Data as well as the following aliases. 

ContactsContract.CommonDataKinds.Nickname

A data kind representing the contact's nickname. 

ContactsContract.CommonDataKinds.Note

Notes about the contact. 

ContactsContract.CommonDataKinds.Organization

A data kind representing an organization. 

ContactsContract.CommonDataKinds.Phone

A data kind representing a telephone number. 

ContactsContract.CommonDataKinds.Photo

A data kind representing an photo for the contact. 

ContactsContract.CommonDataKinds.Relation

A data kind representing a relation. 

ContactsContract.CommonDataKinds.SipAddress

A data kind representing a SIP address for the contact. 

ContactsContract.CommonDataKinds.StructuredNameA data kind representing the contact's proper name. 
ContactsContract.CommonDataKinds.StructuredPostal

A data kind representing a postal addresses. 

ContactsContract.CommonDataKinds.Website

A data kind representing a website related to the contact. 

ContactsContract.ContactOptionsColumnsColumns of ContactsContract.Contacts that track the user's preferences for, or interactions with, the contact. 
ContactsContract.ContactsConstants for the contacts table, which contains a record per aggregate of raw contacts representing the same person. 
ContactsContract.Contacts.AggregationSuggestions

A read-only sub-directory of a single contact aggregate that contains all aggregation suggestions (other contacts). 

ContactsContract.Contacts.DataA sub-directory of a single contact that contains all of the constituent raw contact ContactsContract.Data rows. 
ContactsContract.Contacts.PhotoA read-only sub-directory of a single contact that contains the contact's primary photo. 
ContactsContract.ContactsColumnsColumns of ContactsContract.Contacts that refer to intrinsic properties of the contact, as opposed to the user-specified options found in ContactsContract.ContactOptionsColumns
ContactsContract.ContactStatusColumns 
ContactsContract.Data

Constants for the data table, which contains data points tied to a raw contact. 

ContactsContract.DataColumnsColumns in the Data table. 
ContactsContract.DataColumnsWithJoinsCombines all columns returned by ContactsContract.Data table queries. 
ContactsContract.GroupsConstants for the groups table. 
ContactsContract.GroupsColumns 
ContactsContract.IntentsContains helper classes used to create or manage Intents that involve contacts. 
ContactsContract.Intents.InsertConvenience class that contains string constants used to create contact Intents
ContactsContract.PhoneLookupA table that represents the result of looking up a phone number, for example for caller ID. 
ContactsContract.PhoneLookupColumns 
ContactsContract.Presence This class is deprecated. This old name was never meant to be made public. Do not use.  
ContactsContract.PresenceColumnsAdditional data mixed in with ContactsContract.ContactStatusColumns to link back to specific _ID entries. 
ContactsContract.QuickContactHelper methods to display QuickContact dialogs that allow users to pivot on a specific Contacts entry. 
ContactsContract.RawContactsConstants for the raw contacts table, which contains one row of contact information for each person in each synced account. 
ContactsContract.RawContacts.DataA sub-directory of a single raw contact that contains all of its ContactsContract.Data rows. 
ContactsContract.RawContacts.Entity

A sub-directory of a single raw contact that contains all of its ContactsContract.Data rows. 

ContactsContract.RawContactsColumns 
ContactsContract.RawContactsEntity

Constants for the raw contacts entities table, which can be thought of as an outer join of the raw_contacts table with the data table. 

ContactsContract.Settings

Contacts-specific settings for various Account's. 

ContactsContract.SettingsColumns 
ContactsContract.StatusColumnsSocial status update columns. 
ContactsContract.StatusUpdates

A status update is linked to a ContactsContract.Data row and captures the user's latest status update via the corresponding source, e.g. 

ContactsContract.SyncColumnsColumns that appear when each row of a table belongs to a specific account, including sync information that an account may need. 
ContactsContract.SyncStateA table provided for sync adapters to use for storing private sync state data. 
ContentHandlerThis class converts the content of a certain format (i.e. 
ContentHandlerReceive notification of the logical content of a document. 
ContentHandlerFactoryDefines a factory which is responsible for creating a ContentHandler
ContentLengthInputStreamStream that cuts off after a specified number of bytes. 
ContentLengthOutputStreamA stream wrapper that closes itself after a defined number of bytes. 
ContentLengthStrategyRepresents a strategy to determine the content length based on the properties of an HTTP message. 
ContentObservableA specialization of Observable for ContentObserver that provides methods for invoking the various callback methods of ContentObserver. 
ContentObserverReceives call backs for changes to content. 
ContentProducerAn abstract entity content producer. 
ContentProviderContent providers are one of the primary building blocks of Android applications, providing content to applications. 
ContentProviderClientThe public interface object used to interact with a ContentProvider
ContentProviderOperation 
ContentProviderOperation.BuilderUsed to add parameters to a ContentProviderOperation
ContentProviderResultContains the result of the application of a ContentProviderOperation
ContentQueryMapCaches the contents of a cursor into a Map of String->ContentValues and optionally keeps the cache fresh by registering for updates on the content backing the cursor. 
ContentResolverThis class provides applications access to the content model. 
ContentUrisUtility methods useful for working with content Uris, those with a "content" scheme. 
ContentValuesThis class is used to store a set of values that the ContentResolver can process. 
ContextInterface to global information about an application environment. 
ContextMenuExtension of Menu for context menus providing functionality to modify the header of the context menu. 
ContextMenu.ContextMenuInfoAdditional information regarding the creation of the context menu. 
ContextThemeWrapperA ContextWrapper that allows you to modify the theme from what is in the wrapped context. 
ContextWrapperProxying implementation of Context that simply delegates all of its calls to another Context. 
CookieHTTP "magic-cookie" represents a piece of state information that the HTTP agent and the target server can exchange to maintain a session. 
CookieAttributeHandlerThs interface represents a cookie attribute handler responsible for parsing, validating, and matching a specific cookie attribute, such as path, domain, port, etc. 
CookieHandlerThis class provides a way to manage cookies with a HTTP protocol handler. 
CookieIdentityComparatorThis cookie comparator can be used to compare identity of cookies. 
CookieManagerCookieManager manages cookies according to RFC2109 spec. 
CookieManagerThis class provides a concrete implementation of CookieHandler. 
CookieOriginCookieOrigin class incapsulates details of an origin server that are relevant when parsing, validating or matching HTTP cookies. 
CookiePathComparatorThis cookie comparator ensures that multiple cookies satisfying a common criteria are ordered in the Cookie header such that those with more specific Path attributes precede those with less specific. 
CookiePolicyCookiePolicy has three pre-defined policy. 
CookiePolicy 
CookieSpecDefines the cookie management specification. 
CookieSpecBaseCookie management functions shared by all specification. 
CookieSpecFactory 
CookieSpecParamBean 
CookieSpecPNamesParameter names for cookie specifications in HttpCookie. 
CookieSpecRegistryCookie specification registry that can be used to obtain the corresponding cookie specification implementation for a given type of type or version of cookie. 
CookieStoreA CookieStore object is a repository for cookies. 
CookieStoreAbstract cookie store. 
CookieSyncManagerThe CookieSyncManager is used to synchronize the browser cookie store between RAM and permanent storage. 
CopyOnWriteArrayList<E>Implements a ArrayList variant that is thread-safe. 
CopyOnWriteArraySet<E>A Set that uses an internal CopyOnWriteArrayList for all of its operations. 
CoreConnectionPNamesDefines parameter names for connections in HttpCore. 
CoreProtocolPNamesDefines parameter names for protocol execution in HttpCore. 
CornerPathEffect 
CountDownLatchA synchronization aid that allows one or more threads to wait until a set of operations being performed in other threads completes. 
CountDownTimerSchedule a countdown until a time in the future, with regular notifications on intervals along the way. 
CRC32The CRC32 class is used to compute a CRC32 checksum from data provided as input value. 
CredentialsA class for representing UNIX credentials passed via ancillary data on UNIX domain sockets. 
CredentialsUser name and password based authentication credentials. 
CredentialsProviderAbstract credentials provider. 
CriteriaA class indicating the application criteria for selecting a location provider. 
CRLThis class represents Certificate Revocation Lists (CRLs) maintained by a certificate authority. 
CRLExceptionThe exception that is thrown if errors occur during handling of CRLs. 
CRLSelectorThe interface specification for determining whether a CRL meets some criteria to select CRL objects among a set of CRLs. 
CrossProcessCursor 
CurrencyThis class represents a currency as identified in the ISO 4217 currency codes. 
CursorThis interface provides random read-write access to the result set returned by a database query. 
CursorAdapterAdapter that exposes data from a Cursor to a ListView widget. 
CursorIndexOutOfBoundsExceptionAn exception indicating that a cursor is out of bounds. 
CursorJoinerDoes a join on two cursors using the specified columns. 
CursorJoiner.ResultThe result of a call to next(). 
CursorTreeAdapterAn adapter that exposes data from a series of Cursors to an ExpandableListView widget. 
CursorWindowA buffer containing multiple cursor rows. 
CursorWrapperWrapper class for Cursor that delegates all calls to the actual cursor object  
CycleInterpolatorRepeats the animation for a specified number of cycles. 
CyclicBarrierA synchronization aid that allows a set of threads to all wait for each other to reach a common barrier point. 

D

DashPathEffect 
DatabaseMetaDataAn interface which provides comprehensive information about the database management system and its supported features. 
DatabaseUtilsStatic utility methods for dealing with databases and Cursors. 
DatabaseUtils.InsertHelperThis class allows users to do multiple inserts into a table but compile the SQL insert statement only once, which may increase performance. 
DataFormatExceptionDataFormatException is used to indicate an error in the format of a particular data stream which is to be uncompressed. 
DatagramChannelA DatagramChannel is a selectable channel that represents a partial abstraction of a datagram socket. 
DatagramPacketThis class represents a datagram packet which contains data either to be sent or received through a DatagramSocket
DatagramSocketThis class implements a UDP socket for sending and receiving DatagramPacket
DatagramSocketImplThe abstract superclass for datagram and multicast socket implementations. 
DatagramSocketImplFactoryThis interface defines a factory for datagram socket implementations. 
DataInputDefines an interface for classes that are able to read typed data from some source. 
DataInputStreamWraps an existing InputStream and reads typed data from it. 
DataOutputDefines an interface for classes that are able to write typed data to some target. 
DataOutputStreamWraps an existing OutputStream and writes typed data to it. 
DataSetObservableA specialization of Observable for DataSetObserver that provides methods for invoking the various callback methods of DataSetObserver. 
DataSetObserverReceives call backs when a data set has been changed, or made invalid. 
DataSourceAn interface for the creation of Connection objects which represent a connection to a database. 
DataTruncationAn exception which is thrown when a JDBC driver unexpectedly truncates a data value either when reading (resulting in warning), or when writing data (resulting in an error). 
DatatypeConfigurationException

Indicates a serious configuration error. 

DatatypeConstants

Utility class to contain basic Datatype values as constants. 

DatatypeConstants.FieldType-safe enum class that represents six fields of the Duration class. 
DatatypeFactory

Factory that creates new javax.xml.datatype Objects that map XML to/from Java Objects. 

DateA class which can consume and produce dates in SQL Date format. 
DateDate represents a specific moment in time, to the millisecond. 
DateFormatUtility class for producing strings with formatted date/time. 
DateFormatAn abstract class for date/time formatting subclasses which formats and parses dates or time in a language-independent manner. 
DateFormat.FieldThe instances of this inner class are used as attribute keys and values in AttributedCharacterIterator that the formatToCharacterIterator(Object) method returns. 
DateFormatSymbolsEncapsulates localized date-time formatting data, such as the names of the months, the names of the days of the week, and the time zone data. 
DateKeyListenerFor entering dates in a text field. 
DateParseExceptionAn exception to indicate an error parsing a date string. 
DatePickerA view for selecting a month / year / day based on a calendar like layout. 
DatePicker.OnDateChangedListenerThe callback used to indicate the user changes the date. 
DatePickerDialogA simple dialog containing an DatePicker
DatePickerDialog.OnDateSetListenerThe callback used to indicate the user is done filling in the date. 
DateSorterSorts dates into the following groups: Today Yesterday seven days ago one month ago older than a month ago  
DateTimeKeyListenerFor entering dates and times in the same text field. 
DateUtilsThis class contains various date-related utilities for creating text for things like elapsed time and date ranges, strings for days of the week and months, and AM/PM text etc. 
DateUtilsA utility class for parsing and formatting HTTP dates as used in cookies and other headers. 
DeadObjectExceptionThe object you are calling has died, because its hosting process no longer exists. 
DebugProvides various debugging functions for Android applications, including tracing and allocation counts. 
Debug.InstructionCountAPI for gathering and querying instruction counts. 
Debug.MemoryInfoThis class is used to retrieved various statistics about the memory mappings for this process. 
DebugUtils

Various utilities for debugging and logging. 

DecelerateInterpolatorAn interpolator where the rate of change starts out quickly and and then decelerates. 
DecimalFormatA concrete subclass of NumberFormat that formats decimal numbers. 
DecimalFormatSymbolsEncapsulates the set of symbols (such as the decimal separator, the grouping separator, and so on) needed by DecimalFormat to format numbers. 
DeclHandlerSAX2 extension handler for DTD declaration events. 
DefaultClientConnectionDefault implementation of an operated client connection. 
DefaultClientConnectionOperatorDefault implementation of a ClientConnectionOperator
DefaultConnectionKeepAliveStrategyDefault implementation of a strategy deciding duration that a connection can remain idle. 
DefaultConnectionReuseStrategyDefault implementation of a strategy deciding about connection re-use. 
DefaultedHttpContextHttpContext implementation that delegates resolution of an attribute to the given default HttpContext instance if the attribute is not present in the local one. 
DefaultedHttpParamsHttpParams implementation that delegates resolution of a parameter to the given default HttpParams instance if the parameter is not present in the local one. 
DefaultHandlerDefault base class for SAX2 event handlers. 
DefaultHandler2This class extends the SAX2 base handler class to support the SAX2 LexicalHandler, DeclHandler, and EntityResolver2 extensions. 
DefaultHttpClientDefault implementation of an HTTP client. 
DefaultHttpClientConnectionDefault implementation of a client-side HTTP connection. 
DefaultHttpRequestFactoryDefault implementation of a factory for creating request objects. 
DefaultHttpRequestRetryHandlerThe default HttpRequestRetryHandler used by request executors. 
DefaultHttpResponseFactoryDefault implementation of a factory for creating response objects. 
DefaultHttpRoutePlannerDefault implementation of an HttpRoutePlanner
DefaultHttpServerConnectionDefault implementation of a server-side HTTP connection. 
DefaultProxyAuthenticationHandler 
DefaultRedirectHandlerDefault implementation of RedirectHandler
DefaultRequestDirectorDefault implementation of RequestDirector
DefaultResponseParser 
DefaultTargetAuthenticationHandler 
DefaultUserTokenHandler 
DeflaterThis class compresses data using the DEFLATE algorithm (see specification). 
DeflaterInputStreamAn InputStream filter to compress data. 
DeflaterOutputStreamThis class provides an implementation of FilterOutputStream that compresses data using the DEFLATE algorithm. 
DelayedA mix-in style interface for marking objects that should be acted upon after a given delay. 
DelayQueue<E extends Delayed>An unbounded blocking queue of Delayed elements, in which an element can only be taken when its delay has expired. 
DeprecatedAnnotation type used to mark program elements that should no longer be used by programmers. 
Deque<E>A kind of collection that can insert or remove element at both ends("double ended queue"). 
DESedeKeySpecThe key specification for a triple-DES (DES-EDE) key. 
DESKeySpecThe key specification for a DES key. 
DestroyableAllows for special treatment of sensitive information, when it comes to destroying or clearing of the data. 
DestroyFailedExceptionSignals that the destroy() method failed. 
DeviceAdminInfoThis class is used to specify meta information of a device administrator component. 
DeviceAdminReceiverBase class for implementing a device administration component. 
DevicePolicyManagerPublic interface for managing policies enforced on a device. 
DexClassLoaderProvides a simple ClassLoader implementation that operates on a list of jar/apk files with classes.dex entries. 
DexFileManipulates DEX files. 
DhcpInfoA simple object for retrieving the results of a DHCP request. 
DHGenParameterSpecThe algorithm parameter specification for generating Diffie-Hellman parameters used in Diffie-Hellman key agreement. 
DHKeyThe interface for a Diffie-Hellman key. 
DHParameterSpecThe algorithm parameter specification for the Diffie-Hellman algorithm. 
DHPrivateKeyThe interface for a private key in the Diffie-Hellman key exchange protocol. 
DHPrivateKeySpecThe key specification for a Diffie-Hellman private key. 
DHPublicKeyThe interface for a public key in the Diffie-Hellman key exchange protocol. 
DHPublicKeySpecThe key specification for a Diffie-Hellman public key. 
DialerFilter 
DialerKeyListenerFor dialing-only text entry  
DialogBase class for Dialogs. 
DialogInterface 
DialogInterface.OnCancelListenerInterface used to allow the creator of a dialog to run some code when the dialog is canceled. 
DialogInterface.OnClickListenerInterface used to allow the creator of a dialog to run some code when an item on the dialog is clicked.. 
DialogInterface.OnDismissListenerInterface used to allow the creator of a dialog to run some code when the dialog is dismissed. 
DialogInterface.OnKeyListenerInterface definition for a callback to be invoked when a key event is dispatched to this dialog. 
DialogInterface.OnMultiChoiceClickListenerInterface used to allow the creator of a dialog to run some code when an item in a multi-choice dialog is clicked. 
DialogInterface.OnShowListenerInterface used to allow the creator of a dialog to run some code when the dialog is shown. 
DialogPreferenceA base class for Preference objects that are dialog-based. 
Dictionary<K, V>Note: Do not use this class since it is obsolete. 
DigestExceptionDigestException is a general message digest exception. 
DigestInputStreamDigestInputStream is a FilterInputStream which maintains an associated message digest. 
DigestOutputStreamDigestOutputStream is a FilterOutputStream which maintains an associated message digest. 
DigestScheme

Digest authentication scheme as defined in RFC 2617. 

DigestSchemeFactory 
DigitalClockLike AnalogClock, but digital. 
DigitsKeyListenerFor digits-only text entry  
DiscretePathEffect 
Display 
DisplayMetricsA structure describing general information about a display, such as its size, density, and font scaling. 
DocumentThe Document interface represents the entire HTML or XML document. 
DocumentBuilderDefines the API to obtain DOM Document instances from an XML document. 
DocumentBuilderFactoryDefines a factory API that enables applications to obtain a parser that produces DOM object trees from XML documents. 
DocumentedDefines a meta-annotation for indicating that an annotation is documented and considered part of the public API. 
DocumentFragmentDocumentFragment is a "lightweight" or "minimal" Document object. 
DocumentHandler This interface is deprecated. This interface has been replaced by the SAX2 ContentHandler interface, which includes Namespace support. 
DocumentTypeEach Document has a doctype attribute whose value is either null or a DocumentType object. 
DomainCombinerDomainCombiner is used to update and optimize ProtectionDomains from an AccessControlContext
DOMConfigurationThe DOMConfiguration interface represents the configuration of a document and maintains a table of recognized parameters. 
DOMErrorDOMError is an interface that describes an error. 
DOMErrorHandlerDOMErrorHandler is a callback interface that the DOM implementation can call when reporting errors that happens while processing XML data, or when doing some other processing (e.g. 
DOMExceptionDOM operations only raise exceptions in "exceptional" circumstances, i.e., when an operation is impossible to perform (either for logical reasons, because data is lost, or because the implementation has become unstable). 
DOMImplementationThe DOMImplementation interface provides a number of methods for performing operations that are independent of any particular instance of the document object model. 
DOMImplementationListThe DOMImplementationList interface provides the abstraction of an ordered collection of DOM implementations, without defining or constraining how this collection is implemented. 
DOMImplementationLSDOMImplementationLS contains the factory methods for creating Load and Save objects. 
DOMImplementationSourceThis interface permits a DOM implementer to supply one or more implementations, based upon requested features and versions, as specified in . 
DOMLocatorIndicates the position of a node in a source DOM, intended primarily for error reporting. 
DOMLocatorDOMLocator is an interface that describes a location (e.g. 
DOMResult

Acts as a holder for a transformation result tree in the form of a Document Object Model (DOM) tree. 

DOMSource

Acts as a holder for a transformation Source tree in the form of a Document Object Model (DOM) tree. 

DOMStringListThe DOMStringList interface provides the abstraction of an ordered collection of DOMString values, without defining or constraining how this collection is implemented. 
DoubleThe wrapper for the primitive type double
DoubleBufferA buffer of doubles. 
DownloadListener 
DownloadManagerThe download manager is a system service that handles long-running HTTP downloads. 
DownloadManager.QueryThis class may be used to filter download manager queries. 
DownloadManager.RequestThis class contains all the information necessary to request a new download. 
DrawableA Drawable is a general abstraction for "something that can be drawn." Most often you will deal with Drawable as the type of resource retrieved for drawing things to the screen; the Drawable class provides a generic API for dealing with an underlying visual resource that may take a variety of forms. 
Drawable.CallbackImplement this interface if you want to create an animated drawable that extends Drawable
Drawable.ConstantState 
DrawableContainer 
DrawableContainer.DrawableContainerState 
DrawableMarginSpan 
DrawFilterA DrawFilter subclass can be installed in a Canvas. 
DriverAn interface to a JDBC driver. 
DriverSAX2 Driver that pulls events from XmlPullParser and comverts them into SAX2 callbacks. 
DriverManagerProvides facilities for managing JDBC drivers. 
DriverPropertyInfoA class holding information about driver properties of a database connection. 
DropBoxManagerEnqueues chunks of data (from various sources -- application crashes, kernel log records, etc.). 
DropBoxManager.EntryA single entry retrieved from the drop box. 
DSAKeyThe base interface for Digital Signature Algorithm (DSA) public or private keys. 
DSAKeyPairGeneratorThe interface for key generators that can generate DSA key pairs. 
DSAParameterSpecThe parameter specification used with the Digital Signature Algorithm (DSA). 
DSAParamsThe interface for Digital Signature Algorithm (DSA) specific parameters. 
DSAPrivateKeyThe interface for a Digital Signature Algorithm (DSA) private key. 
DSAPrivateKeySpecThe parameters specifying a DSA private key. 
DSAPublicKeyThe interface for a Digital Signature Algorithm (DSA) public key. 
DSAPublicKeySpecThe parameters specifying a DSA public key. 
DTDHandlerReceive notification of basic DTD-related events. 
DuplicateFormatFlagsExceptionThe unchecked exception will be thrown out if there are duplicate flags given out in the format specifier. 
Duration

Immutable representation of a time span as defined in the W3C XML Schema 1.0 specification. 

DynamicDrawableSpan 
DynamicLayoutDynamicLayout is a text layout that updates itself as the text is edited. 

E

ECFieldThe base interface for a Finite Field of an Elliptic Curve. 
ECFieldF2mThe parameters specifying a characteristic 2 finite field of an elliptic curve. 
ECFieldFpThe parameters specifying a prime finite field of an elliptic curve. 
ECGenParameterSpecThe parameter specification used to generate elliptic curve domain parameters. 
ECKeyThe base interface for Elliptic Curve (EC) public or private keys. 
ECParameterSpecThe parameter specification used with Elliptic Curve Cryptography (ECC). 
ECPointA Point on an Elliptic Curve in barycentric (or affine) coordinates. 
ECPrivateKeyThe interface for an Elliptic Curve (EC) private key. 
ECPrivateKeySpecThe parameters specifying an Elliptic Curve (EC) private key. 
ECPublicKeyThe interface for an Elliptic Curve (EC) public key. 
ECPublicKeySpecThe parameters specifying an Elliptic Curve (EC) public key. 
EditableThis is the interface for text whose content and markup can be changed (as opposed to immutable text like Strings). 
Editable.FactoryFactory used by TextView to create new Editables. 
EditorInfoAn EditorInfo describes several attributes of a text editing object that an input method is communicating with (typically an EditText), most importantly the type of text content it contains. 
EditTextEditText is a thin veneer over TextView that configures itself to be editable. 
EditTextPreferenceA Preference that allows for string input. 
EGL 
EGL10 
EGL11 
EGLConfig 
EGLContext 
EGLDisplay 
EGLSurface 
ElementAn XML element. 
ElementThe Element interface represents an element in an HTML or XML document. 
ElementListenerListens for the beginning and ending of elements. 
ElementTypeDefines an enumeration for Java program elements. 
EllipticCurveAn Elliptic Curve with its necessary values. 
EmbossMaskFilter 
EmptyStackExceptionAn EmptyStackException is thrown if the pop/peek method of a stack is executed on an empty stack. 
EncodedKeySpecThe abstract key specification for a public or a private key in encoded format. 
EncodingUtilsThe home for utility methods that handle various encoding tasks. 
EncryptedPrivateKeyInfoThis class implements the EncryptedPrivateKeyInfo ASN.1 type as specified in PKCS #8 - Private-Key Information Syntax Standard
EndElementListenerListens for the end of elements. 
EndTextElementListenerListens for the end of text elements. 
EnglishReasonPhraseCatalogEnglish reason phrases for HTTP status codes. 
EntityA representation of a item using ContentValues. 
EntityThis interface represents a known entity, either parsed or unparsed, in an XML document. 
Entity.NamedContentValues 
EntityDeserializerDefault implementation of an entity deserializer. 
EntityEnclosingRequestWrapperA wrapper class for HttpEntityEnclosingRequests that can be used to change properties of the current request without modifying the original object. 
EntityIteratorA specialization of Iterator that allows iterating over a collection of Entity objects. 
EntityReferenceEntityReference nodes may be used to represent an entity reference in the tree. 
EntityResolverBasic interface for resolving entities. 
EntityResolver2Extended interface for mapping external entity references to input sources, or providing a missing external subset. 
EntitySerializerDefault implementation of an entity serializer. 
EntityTemplateEntity that delegates the process of content generation to an abstract content producer. 
EntityUtilsStatic helpers for dealing with entities
Enum<E extends Enum<E>>The superclass of all enumerated types. 
EnumConstantNotPresentExceptionThrown if an enum constant does not exist for a particular name. 
Enumeration<E>A legacy iteration interface. 
EnumMap<K extends Enum<K>, V>An Map specialized for use with Enum types as keys. 
EnumSet<E extends Enum<E>>An EnumSet is a specialized Set to be used with enums as keys. 
EnvironmentProvides access to environment variables. 
EnvironmentalReverbA sound generated within a room travels in many directions. 
EnvironmentalReverb.OnParameterChangeListenerThe OnParameterChangeListener interface defines a method called by the EnvironmentalReverb when a parameter value has changed. 
EnvironmentalReverb.SettingsThe Settings class regroups all environmental reverb parameters. 
EOFExceptionThrown when a program encounters the end of a file or stream during an input operation. 
EofSensorInputStreamA stream wrapper that triggers actions on close() and EOF. 
EofSensorWatcherA watcher for EofSensorInputStream
EqualizerAn Equalizer is used to alter the frequency response of a particular music source or of the main output mix. 
Equalizer.OnParameterChangeListenerThe OnParameterChangeListener interface defines a method called by the Equalizer when a parameter value has changed. 
Equalizer.SettingsThe Settings class regroups all equalizer parameters. 
ErrorError is the superclass of all classes that represent unrecoverable errors. 
ErrorHandlerBasic interface for SAX error handlers. 
ErrorListener

To provide customized error handling, implement this interface and use the setErrorListener method to register an instance of the implementation with the Transformer

ErrorManagerAn error reporting facility for Handler implementations to record any error that may happen during logging. 
ETC1Methods for encoding and decoding ETC1 textures. 
ETC1UtilUtility methods for using ETC1 compressed textures. 
ETC1Util.ETC1TextureA utility class encapsulating a compressed ETC1 texture. 
EventListenerEventListener is the superclass of all event listener interfaces. 
EventListenerProxyThis abstract class provides a simple wrapper for objects of type EventListener
EventLogAccess to the system diagnostic event record. 
EventLog.EventA previously logged event read from the logs. 
EventLogTags This class is deprecated. This class is no longer functional. Use EventLog instead.  
EventLogTags.Description 
EventObjectEventObjects represent events. 
ExceptionException is the superclass of all classes that represent recoverable exceptions. 
ExceptionInInitializerErrorThrown when an exception occurs during class initialization. 
ExceptionUtilsThe home for utility methods that handle various exception-related tasks. 
Exchanger<V>A synchronization point at which threads can pair and swap elements within pairs. 
ExecutionContextContext attribute names for protocol execution. 
ExecutionExceptionException thrown when attempting to retrieve the result of a task that aborted by throwing an exception. 
ExecutorAn object that executes submitted Runnable tasks. 
ExecutorCompletionService<V>A CompletionService that uses a supplied Executor to execute tasks. 
ExecutorsFactory and utility methods for Executor, ExecutorService, ScheduledExecutorService, ThreadFactory, and Callable classes defined in this package. 
ExecutorServiceAn Executor that provides methods to manage termination and methods that can produce a Future for tracking progress of one or more asynchronous tasks. 
ExemptionMechanismThis class implements the functionality of an exemption mechanism such as key recovery, key weakening, or key escrow
ExemptionMechanismExceptionThis is the base class for ExemptionMechanismException
ExemptionMechanismSpiThe Service Provider Interface (SPI) definition for the ExemptionMechanism class. 
ExifInterfaceThis is a class for reading and writing Exif tags in a JPEG file. 
ExpandableListActivityAn activity that displays an expandable list of items by binding to a data source implementing the ExpandableListAdapter, and exposes event handlers when the user selects an item. 
ExpandableListAdapterAn adapter that links a ExpandableListView with the underlying data. 
ExpandableListViewA view that shows items in a vertically scrolling two-level list. 
ExpandableListView.ExpandableListContextMenuInfoExtra menu information specific to an ExpandableListView provided to the onCreateContextMenu(ContextMenu, View, ContextMenuInfo) callback when a context menu is brought up for this AdapterView. 
ExpandableListView.OnChildClickListenerInterface definition for a callback to be invoked when a child in this expandable list has been clicked. 
ExpandableListView.OnGroupClickListenerInterface definition for a callback to be invoked when a group in this expandable list has been clicked. 
ExpandableListView.OnGroupCollapseListenerUsed for being notified when a group is collapsed  
ExpandableListView.OnGroupExpandListenerUsed for being notified when a group is expanded  
ExternalizableDefines an interface for classes that want to be serializable, but have their own binary representation. 
ExtractEditTextSpecialization of EditText for showing and interacting with the extracted text in a full-screen input method. 
ExtractedTextInformation about text that has been extracted for use by an input method. 
ExtractedTextRequestDescription of what an input method would like from an application when extract text from its input editor. 

F

FaceDetectorIdentifies the faces of people in a Bitmap graphic object. 
FaceDetector.FaceA Face contains all the information identifying the location of a face in a bitmap. 
FactoryConfigurationErrorThrown when a problem with configuration with the Parser Factories exists. 
FeatureInfoA single feature that can be requested by an application. 
FieldThis class represents a field. 
FieldPositionIdentifies fields in formatted strings. 
FileAn "abstract" representation of a file system entity identified by a pathname. 
FileBackupHelperA helper class that can be used in conjunction with BackupAgentHelper to manage the backup of a set of files. 
FileChannelAn abstract channel type for interaction with a platform file. 
FileChannel.MapModeMapMode defines file mapping mode constants. 
FileDescriptorThe lowest-level representation of a file, device, or socket. 
FileEntityAn entity whose content is retrieved from a file. 
FileFilterAn interface for filtering File objects based on their names or other information. 
FileHandlerA FileHandler writes logging records into a specified file or a rotating set of files. 
FileInputStreamA specialized InputStream that reads from a file in the file system. 
FileLockA FileLock represents a locked region of a file. 
FileLockInterruptionExceptionA FileLockInterruptionException is thrown when a thread is interrupted while waiting to acquire a file lock. 
FilenameFilterAn interface for filtering File objects based on their names or the directory they reside in. 
FileNameMapDefines a scheme for mapping a filename type to a MIME content type. 
FileNotFoundExceptionThrown when a file specified by a program cannot be found. 
FileObserverMonitors files (using inotify) to fire an event after files are accessed or changed by by any process on the device (including this one). 
FileOutputStreamA specialized OutputStream that writes to a file in the file system. 
FilePermissionA permission for accessing a file or directory. 
FileReaderA specialized Reader that reads from a file in the file system. 
FileWriterA specialized Writer that writes to a file in the file system. 
Filter

A filter constrains data with a filtering pattern. 

FilterA Filter provides a mechanism for exercising fine-grained control over which records get logged. 
Filter.FilterListener

Listener used to receive a notification upon completion of a filtering operation. 

Filter.FilterResults

Holds the results of a filtering operation. 

Filterable

Defines a filterable behavior. 

FilterInputStreamWraps an existing InputStream and performs some transformation on the input data while it is being read. 
FilterOutputStreamWraps an existing OutputStream and performs some transformation on the output data while it is being written. 
FilterQueryProviderThis class can be used by external clients of CursorAdapter and CursorTreeAdapter to define how the content of the adapter should be filtered. 
FilterReaderWraps an existing Reader and performs some transformation on the input data while it is being read. 
FilterWriterWraps an existing Writer and performs some transformation on the output data while it is being written. 
FlakyTestThis annotation can be used on an InstrumentationTestCase's test methods. 
FloatThe wrapper for the primitive type float
FloatBufferA buffer of floats. 
FloatMathMath routines similar to those found in Math
FlushableDefines an interface for classes that can (or need to) be flushed, typically before some output processing is considered to be finished and the object gets closed. 
FocusFinderThe algorithm used for finding the next focusable view in a given direction from a view that currently has focus. 
ForegroundColorSpan 
FormatThe base class for all formats. 
Format.FieldInner class used to represent Format attributes in the AttributedCharacterIterator that the formatToCharacterIterator() method returns in Format subclasses. 
FormatException 
FormatFlagsConversionMismatchExceptionA FormatFlagsConversionMismatchException will be thrown if a conversion and the flags are incompatible. 
FormattableClasses that handle custom formatting for the 's' specifier of Formatter should implement the Formattable interface. 
FormattableFlagsFormattableFlags are used as a parameter to formatTo(Formatter, int, int, int) and change the output format in Formattables. 
FormattedHeaderAn HTTP header which is already formatted. 
FormatterUtility class to aid in formatting common values that are not covered by the standard java.util.Formatter. 
FormatterFormats arguments according to a format string (like printf in C). 
FormatterFormatter objects are used to format LogRecord objects into a string representation. 
Formatter.BigDecimalLayoutFormThe enumeration giving the available styles for formatting very large decimal numbers. 
FormatterClosedExceptionA FormatterClosedException will be thrown if the formatter has been closed. 
FrameLayoutFrameLayout is designed to block out an area on the screen to display a single item. 
FrameLayout.LayoutParamsPer-child layout information for layouts that support margins. 
Future<V>A Future represents the result of an asynchronous computation. 
FutureTask<V>A cancellable asynchronous computation. 

G

GalleryA view that shows items in a center-locked, horizontally scrolling list. 
Gallery.LayoutParamsGallery extends LayoutParams to provide a place to hold current Transformation information along with previous position/transformation info. 
GatheringByteChannelThe interface for channels that can write a set of buffers in a single operation. 
GeneralSecurityExceptionGeneralSecurityException is a general security exception and the superclass for all security specific exceptions. 
GenericArrayTypeThis interface represents an array type with a component type that is either a parameterized type or a type variable. 
GenericDeclarationCommon interface for language constructs that declare type parameters. 
GenericSignatureFormatErrorIndicates that a malformed signature has been encountered via a reflective method. 
GeocoderA class for handling geocoding and reverse geocoding. 
GeolocationPermissionsThis class is used to get Geolocation permissions from, and set them on the WebView. 
GeolocationPermissions.CallbackCallback interface used by the browser to report a Geolocation permission state set by the user in response to a permissions prompt. 
GeomagneticFieldThis class is used to estimated estimate magnetic field at a given point on Earth, and in particular, to compute the magnetic declination from true north. 
GestureA gesture is a hand-drawn shape on a touch screen. 
GestureDetectorDetects various gestures and events using the supplied MotionEvents. 
GestureDetector.OnDoubleTapListenerThe listener that is used to notify when a double-tap or a confirmed single-tap occur. 
GestureDetector.OnGestureListenerThe listener that is used to notify when gestures occur. 
GestureDetector.SimpleOnGestureListenerA convenience class to extend when you only want to listen for a subset of all the gestures. 
GestureLibraries 
GestureLibrary 
GestureOverlayViewA transparent overlay for gesture input that can be placed on top of other widgets or contain other widgets. 
GestureOverlayView.OnGestureListener 
GestureOverlayView.OnGesturePerformedListener 
GestureOverlayView.OnGesturingListener 
GesturePointA timed point of a gesture stroke. 
GestureStoreGestureLibrary maintains gesture examples and makes predictions on a new gesture  
GestureStrokeA gesture stroke started on a touch down and ended on a touch up. 
GestureUtilsUtility functions for gesture processing & analysis, including methods for:
  • feature extraction (e.g., samplers and those for calculating bounding boxes and gesture path lengths);
  • geometric transformation (e.g., translation, rotation and scaling);
  • gesture similarity comparison (e.g., calculating Euclidean or Cosine distances between two gestures). 
GetCharsPlease implement this interface if your CharSequence has a getChars() method like the one in String that is faster than calling charAt() multiple times. 
GL 
GL10 
GL10Ext 
GL11 
GL11Ext 
GL11ExtensionPack 
GLDebugHelperA helper class for debugging OpenGL ES applications. 
GLES10 
GLES10Ext 
GLES11 
GLES11Ext 
GLES20OpenGL ES 2.0  
GLExceptionAn exception class for OpenGL errors. 
GLSurfaceViewAn implementation of SurfaceView that uses the dedicated surface for displaying OpenGL rendering. 
GLSurfaceView.EGLConfigChooserAn interface for choosing an EGLConfig configuration from a list of potential configurations. 
GLSurfaceView.EGLContextFactoryAn interface for customizing the eglCreateContext and eglDestroyContext calls. 
GLSurfaceView.EGLWindowSurfaceFactoryAn interface for customizing the eglCreateWindowSurface and eglDestroySurface calls. 
GLSurfaceView.GLWrapperAn interface used to wrap a GL interface. 
GLSurfaceView.RendererA generic renderer interface. 
GLUA set of GL utilities inspired by the OpenGL Utility Toolkit. 
GLUtilsUtility class to help bridging OpenGL ES and Android APIs. 
GpsSatelliteThis class represents the current state of a GPS satellite. 
GpsStatusThis class represents the current state of the GPS engine. 
GpsStatus.ListenerUsed for receiving notifications when GPS status has changed. 
GpsStatus.NmeaListenerUsed for receiving NMEA sentences from the GPS. 
GradientDrawableA Drawable with a color gradient for buttons, backgrounds, etc. 
GradientDrawable.OrientationControls how the gradient is oriented relative to the drawable's bounds  
GravityStandard constants and tools for placing an object within a potentially larger container. 
GregorianCalendarGregorianCalendar is a concrete subclass of Calendar and provides the standard calendar used by most of the world. 
GridLayoutAnimationControllerA layout animation controller is used to animated a grid layout's children. 
GridLayoutAnimationController.AnimationParametersThe set of parameters that has to be attached to each view contained in the view group animated by the grid layout animation controller. 
GridViewA view that shows items in two-dimensional scrolling grid. 
GroupA Principal that represents a group of principals. 
GsmCellLocationRepresents the cell location on a GSM phone. 
GuardGuard implementors protect access to other objects. 
GuardedObjectGuardedObject controls access to an object, by checking all requests for the object with a Guard
GZIPInputStreamThe GZIPInputStream class is used to read data stored in the GZIP format, reading and decompressing GZIP data from the underlying stream into its buffer. 
GZIPOutputStreamThe GZIPOutputStream class is used to write data to a stream in the GZIP storage format. 

H

HandlerA Handler allows you to send and process Message and Runnable objects associated with a thread's MessageQueue
HandlerA Handler object accepts a logging request and exports the desired messages to a target, for example, a file, the console, etc. 
Handler.CallbackCallback interface you can use when instantiating a Handler to avoid having to implement your own subclass of Handler. 
HandlerBase This class is deprecated. This class works with the deprecated DocumentHandler interface. It has been replaced by the SAX2 DefaultHandler class. 
HandlerThreadHandy class for starting a new thread that has a looper. 
HandshakeCompletedEventThe event object encapsulating the information about a completed SSL handshake on a SSL connection. 
HandshakeCompletedListenerThe listener to be implemented to receive event notifications on completion of SSL handshake on an SSL connection. 
HapticFeedbackConstantsConstants to be used to perform haptic feedback effects via performHapticFeedback(int)  
HashMap<K, V>HashMap is an implementation of Map
HashSet<E>HashSet is an implementation of a Set. 
Hashtable<K, V>Hashtable is a synchronized implementation of Map
HeaderRepresents an HTTP header field. 
HeaderElementOne element of an HTTP header value. 
HeaderElementIteratorA type-safe iterator for HeaderElement objects. 
HeaderGroupA class for combining a set of headers. 
HeaderIteratorA type-safe iterator for Header objects. 
HeaderValueFormatterInterface for formatting elements of a header value. 
HeaderValueParserInterface for parsing header values into elements. 
HeaderViewListAdapterListAdapter used when a ListView has header views. 
HeterogeneousExpandableListAdditional methods that when implemented make an ExpandableListAdapter take advantage of the Adapter view type mechanism. 
HideReturnsTransformationMethodThis transformation method causes any carriage return characters (\r) to be hidden by displaying them as zero-width non-breaking space characters (). 
HorizontalScrollViewLayout container for a view hierarchy that can be scrolled by the user, allowing it to be larger than the physical display. 
HostNameResolver 
HostnameVerifierThe interface to be used to provide hostname verification functionality. 
HtmlThis class processes HTML strings into displayable styled text. 
Html.ImageGetterRetrieves images for HTML <img> tags. 
Html.TagHandlerIs notified when HTML tags are encountered that the parser does not know how to interpret. 
HTTPConstants and static helpers related to the HTTP protocol. 
HttpAbstractParamBean 
HttpAuthHandlerHTTP authentication handler: local handler that takes care of HTTP authentication requests. 
HttpClientInterface for an HTTP client. 
HttpClientConnectionAn HTTP connection for use on the client side. 
HttpClientParamsAn adaptor for accessing HTTP client parameters in HttpParams
HttpConnectionA generic HTTP connection, useful on client and server side. 
HttpConnectionMetricsThe point of access to the statistics of an HttpConnection
HttpConnectionMetricsImplImplementation of the metrics interface. 
HttpConnectionParamBean 
HttpConnectionParamsAn adaptor for accessing connection parameters in HttpParams
HttpContextA context for executing a request. 
HttpCookieAn opaque key-value value pair held by an HTTP client to permit a stateful session with an HTTP server. 
HttpDateGeneratorGenerates a date in the format required by the HTTP protocol. 
HttpDeleteHTTP DELETE method

The HTTP DELETE method is defined in section 9.7 of RFC2616:

The DELETE method requests that the origin server delete the resource identified by the Request-URI. 
HttpEntityAn entity that can be sent or received with an HTTP message. 
HttpEntityEnclosingRequestA request with an entity. 
HttpEntityEnclosingRequestBaseBasic implementation of an HTTP request that can be modified. 
HttpEntityWrapperBase class for wrapping entities. 
HttpExceptionSignals that an HTTP exception has occurred. 
HttpExpectationVerifierDefines an interface to verify whether an incoming HTTP request meets the target server's expectations. 
HttpGetHTTP GET method. 
HttpHeadHTTP HEAD method. 
HttpHostHolds all of the variables needed to describe an HTTP connection to a host. 
HttpHostConnectExceptionA ConnectException that specifies the HttpHost that was being connected to. 
HttpInetConnectionAn HTTP connection over the Internet Protocol (IP). 
HttpMessageA generic HTTP message. 
HttpMessageParserGeneric message parser interface. 
HttpMessageWriterGeneric message writer interface. 
HttpOptionsHTTP OPTIONS method. 
HttpParamsRepresents a collection of HTTP protocol and framework parameters. 
HttpPostHTTP POST method. 
HttpProcessorPerforms interceptor processing of requests and responses. 
HttpProtocolParamBean 
HttpProtocolParamsThis class implements an adaptor around the HttpParams interface to simplify manipulation of the HTTP protocol specific parameters. 
HttpPutHTTP PUT method. 
HttpRequestAn HTTP request. 
HttpRequestBaseBasic implementation of an HTTP request that can be modified. 
HttpRequestExecutorSends HTTP requests and receives the responses. 
HttpRequestFactoryA factory for HttpRequest objects. 
HttpRequestHandler 
HttpRequestHandlerRegistryMaintains a map of HTTP request handlers keyed by a request URI pattern. 
HttpRequestHandlerResolverInterface to be implemented by objects that can resolve HttpRequestHandler instances by request URI. 
HttpRequestInterceptorProcesses a request. 
HttpRequestInterceptorListProvides access to an ordered list of request interceptors. 
HttpRequestParser 
HttpRequestRetryHandlerA handler for determining if an HttpRequest should be retried after a recoverable exception during execution. 
HttpRequestWriter 
HttpResponseAn HTTP response. 
HttpResponseExceptionSignals a non 2xx HTTP response. 
HttpResponseFactoryA factory for HttpResponse objects. 
HttpResponseInterceptorProcesses a response. 
HttpResponseInterceptorListProvides access to an ordered list of response interceptors. 
HttpResponseParser 
HttpResponseWriter 
HttpRetryExceptionIf a HTTP request has to be retried, this exception will be thrown if the request cannot be retried automatically. 
HttpRouteThe route for a request. 
HttpRouteDirectorProvides directions on establishing a route. 
HttpRoutePlannerEncapsulates logic to compute a HttpRoute to a target host. 
HttpServerConnectionAn HTTP connection for use on the server side. 
HttpServiceMinimalistic server-side implementation of an HTTP processor. 
HttpStatusConstants enumerating the HTTP status codes. 
HttpsURLConnectionThis abstract subclass of HttpURLConnection defines methods for managing HTTPS connections according to the description given by RFC 2818. 
HttpTraceHTTP TRACE method. 
HttpTransportMetrics 
HttpTransportMetricsImplDefault implementation of HttpTransportMetrics
HttpUriRequestExtended version of the HttpRequest interface that provides convenience methods to access request properties such as request URI and method type. 
HttpURLConnectionAn URLConnection for HTTP (RFC 2616) used to send and receive data over the web. 
HttpVersionRepresents an HTTP version, as specified in RFC 2616. 

I

IBinderBase interface for a remotable object, the core part of a lightweight remote procedure call mechanism designed for high performance when performing in-process and cross-process calls. 
IBinder.DeathRecipientInterface for receiving a callback when the process hosting an IBinder has gone away. 
IconMarginSpan 
Identity This class is deprecated. The functionality of this class has been replace by Principal, KeyStore and the java.security.cert package.  
IdentityHashMap<K, V>IdentityHashMap is a variant on HashMap which tests equality by reference instead of equality by value. 
IdentityInputStreamA stream for reading from a session input buffer
IdentityOutputStreamA stream for writing with an "identity" transport encoding. 
IdentityScope This class is deprecated. The functionality of this class has been replace by Principal, KeyStore and the java.security.cert package.  
IdleConnectionHandlerA helper class for connection managers to track idle connections. 
IDNConverts internationalized domain names between Unicode and the ASCII Compatible Encoding (ACE) representation. 
IInterfaceBase class for Binder interfaces. 
IllegalAccessErrorThrown when the virtual machine notices that a program tries access a field which is not accessible from where it is referenced. 
IllegalAccessExceptionThrown when a program attempts to access a field or method which is not accessible from the location where the reference is made. 
IllegalArgumentExceptionThrown when a method is invoked with an argument which it can not reasonably deal with. 
IllegalBlockingModeExceptionAn IllegalBlockingModeException is thrown when an operation that requires a specific blocking mode is invoked on a channel that is in a different blocking mode. 
IllegalBlockSizeExceptionThe exception, that is thrown when the data length provided to a block cipher does not match the block size of the cipher. 
IllegalCharsetNameExceptionAn IllegalCharsetNameException is thrown when an illegal charset name is encountered. 
IllegalFormatCodePointExceptionAn IllegalFormatCodePointException will be thrown if an invalid Unicode code point (defined by isValidCodePoint(int)) is passed as a parameter to a Formatter. 
IllegalFormatConversionExceptionAn IllegalFormatConversionException will be thrown when the parameter is incompatible with the corresponding format specifier. 
IllegalFormatExceptionAn IllegalFormatException is thrown when a format string that contains either an illegal syntax or format specifier is transferred as a parameter. 
IllegalFormatFlagsExceptionAn IllegalFormatFlagsException will be thrown if the combination of the format flags is illegal. 
IllegalFormatPrecisionExceptionAn IllegalFormatPrecisionException will be thrown if the precision is a negative other than -1 or in other cases where precision is not supported. 
IllegalFormatWidthExceptionAn IllegalFormatWidthException will be thrown if the width is a negative value other than -1 or in other cases where a width is not supported. 
IllegalMonitorStateExceptionThrown when a monitor operation is attempted when the monitor is not in the correct state, for example when a thread attempts to exit a monitor which it does not own. 
IllegalSelectorExceptionAn IllegalSelectorException is thrown when a call is made to register a channel on a selector that has been created by a different provider. 
IllegalStateExceptionThrown when an action is attempted at a time when the virtual machine is not in the correct state. 
IllegalThreadStateExceptionThrown when an operation is attempted which is not possible given the state that the executing thread is in. 
ImageButton

Displays a button with an image (instead of text) that can be pressed or clicked by the user. 

ImageFormat 
ImageSpan 
ImageSwitcher 
ImageViewDisplays an arbitrary image, such as an icon. 
ImageView.ScaleTypeOptions for scaling the bounds of an image to the bounds of this view. 
IncompatibleClassChangeErrorIncompatibleClassChangeError is the superclass of all classes which represent errors that occur when inconsistent class files are loaded into the same running image. 
IncompleteAnnotationExceptionIndicates that an element of an annotation type was accessed that was added after the type was compiled or serialized. 
IndexedPropertyChangeEventA type of PropertyChangeEvent that indicates that an indexed property has changed. 
IndexOutOfBoundsExceptionThrown when a program attempts to access a value in an indexable collection using a value which is outside of the range of valid indices. 
Inet4AddressAn IPv4 address. 
Inet6AddressAn IPv6 address. 
InetAddressAn Internet Protocol (IP) address. 
InetAddressUtilsA collection of utilities relating to InetAddresses. 
InetSocketAddressThis class represents a socket endpoint described by a IP address and a port number. 
InflateExceptionThis exception is thrown by an inflater on error conditions. 
InflaterThis class uncompresses data that was compressed using the DEFLATE algorithm (see specification). 
InflaterInputStreamThis class provides an implementation of FilterInputStream that uncompresses data that was compressed using the DEFLATE algorithm (see specification). 
InflaterOutputStreamAn OutputStream filter to decompress data. 
InheritableThreadLocal<T>A thread-local variable whose value is passed from parent to child thread. 
InheritedDefines a meta-annotation for indicating that an annotation is automatically inherited. 
InputBindingInformation given to an InputMethod about a client connecting to it. 
InputConnectionThe InputConnection interface is the communication channel from an InputMethod back to the application that is receiving its input. 
InputConnectionWrapper

Wrapper class for proxying calls to another InputConnection. 

InputDeviceDescribes the capabilities of a particular input device. 
InputDevice.MotionRangeProvides information about the range of values for a particular MotionEvent coordinate. 
InputEventCommon base class for input events. 
InputFilterInputFilters can be attached to Editables to constrain the changes that can be made to them. 
InputFilter.AllCapsThis filter will capitalize all the lower case letters that are added through edits. 
InputFilter.LengthFilterThis filter will constrain edits not to make the length of the text greater than the specified length. 
InputMethodThe InputMethod interface represents an input method which can generate key events and text, such as digital, email addresses, CJK characters, other language characters, and etc., while handling various input events, and send the text back to the application that requests text input. 
InputMethod.SessionCallback 
InputMethodInfoThis class is used to specify meta information of an input method. 
InputMethodManagerCentral system API to the overall input method framework (IMF) architecture, which arbitrates interaction between applications and the current input method. 
InputMethodServiceInputMethodService provides a standard implementation of an InputMethod, which final implementations can derive from and customize. 
InputMethodService.InputMethodImplConcrete implementation of AbstractInputMethodService.AbstractInputMethodImpl that provides all of the standard behavior for an input method. 
InputMethodService.InputMethodSessionImplConcrete implementation of AbstractInputMethodService.AbstractInputMethodSessionImpl that provides all of the standard behavior for an input method session. 
InputMethodService.InsetsInformation about where interesting parts of the input method UI appear. 
InputMethodSessionThe InputMethodSession interface provides the per-client functionality of InputMethod that is safe to expose to applications. 
InputMethodSession.EventCallback 
InputMismatchExceptionAn InputMismatchException is thrown by a scanner to indicate that the next token does not match or is out of range for the type specified in the pattern. 
InputQueueAn input queue provides a mechanism for an application to receive incoming input events. 
InputQueue.CallbackInterface to receive notification of when an InputQueue is associated and dissociated with a thread. 
InputSourceA single input source for an XML entity. 
InputStreamThe base class for all input streams. 
InputStreamEntityA streamed entity obtaining content from an InputStream
InputStreamReaderA class for turning a byte stream into a character stream. 
InputTypeBit definitions for an integer defining the basic content type of text held in an Editable object. 
InsetDrawableA Drawable that insets another Drawable by a specified distance. 
InstantiationErrorThrown when the virtual machine notices that a program tries to create a new instance of a class which has no visible constructors from the location where new is invoked. 
InstantiationExceptionThrown when a program attempts to access a constructor which is not accessible from the location where the reference is made. 
InstrumentationBase class for implementing application instrumentation code. 
Instrumentation.ActivityMonitorInformation about a particular kind of Intent that is being monitored. 
Instrumentation.ActivityResultDescription of a Activity execution result to return to the original activity. 
InstrumentationInfoInformation you can retrieve about a particular piece of test instrumentation. 
InstrumentationTestCaseA test case that has access to Instrumentation
InstrumentationTestRunnerAn Instrumentation that runs various types of TestCases against an Android package (application). 
InstrumentationTestSuiteA TestSuite that injects Instrumentation into InstrumentationTestCase before running them. 
IntBufferA buffer of ints. 
IntegerThe wrapper for the primitive type int
IntentAn intent is an abstract description of an operation to be performed. 
Intent.FilterComparisonWrapper class holding an Intent and implementing comparisons on it for the purpose of filtering. 
Intent.ShortcutIconResourceRepresents a shortcut/live folder icon resource. 
IntentFilterStructured description of Intent values to be matched. 
IntentFilter.AuthorityEntryThis is an entry for a single authority in the Iterator returned by authoritiesIterator()
IntentFilter.MalformedMimeTypeExceptionThis exception is thrown when a given MIME type does not have a valid syntax. 
IntentSenderA description of an Intent and target action to perform with it. 
IntentSender.OnFinishedCallback interface for discovering when a send operation has completed. 
IntentSender.SendIntentExceptionException thrown when trying to send through a PendingIntent that has been canceled or is otherwise no longer able to execute the request. 
IntentServiceIntentService is a base class for Services that handle asynchronous requests (expressed as Intents) on demand. 
InterfaceAddressIdentifies one of a network interface's addresses. 
InternalErrorThrown when the virtual machine notices that it has gotten into an undefined state. 
Interpolator 
InterpolatorAn interpolator defines the rate of change of an animation. 
Interpolator.Result 
InterruptedExceptionThrown when a waiting thread is activated before the condition it was waiting for has been satisfied. 
InterruptedIOExceptionSignals that a blocking I/O operation has been interrupted. 
InterruptibleChannelChannels that implement this interface can be asynchronously closed and interrupted. 
InvalidAlgorithmParameterExceptionInvalidAlgorithmParameterException indicates the occurrence of invalid algorithm parameters. 
InvalidClassExceptionSignals a problem during the serialization or or deserialization of an object. 
InvalidCredentialsExceptionAuthentication credentials required to respond to a authentication challenge are invalid 
InvalidKeyExceptionInvalidKeyException indicates exceptional conditions, caused by an invalid key. 
InvalidKeySpecExceptionThe exception that is thrown when an invalid key specification is encountered. 
InvalidMarkExceptionAn InvalidMarkException is thrown when reset() is called on a buffer, but no mark has been set previously. 
InvalidObjectExceptionSignals that, during deserialization, the validation of an object has failed. 
InvalidParameterExceptionInvalidParameterException indicates exceptional conditions, caused by invalid parameters. 
InvalidParameterSpecExceptionThe exception that is thrown when an invalid parameter specification is encountered. 
InvalidPreferencesFormatExceptionAn exception to indicate that the input XML file is not well-formed or could not be validated against the appropriate document type (specified by in the Preferences). 
InvalidPropertiesFormatExceptionAn InvalidPropertiesFormatException is thrown if loading the XML document defining the properties does not follow the Properties specification. 
InvocationHandlerImplementors of this interface dispatch methods invoked on proxy instances. 
InvocationTargetExceptionThis class provides a wrapper for an exception thrown by a Method or Constructor invocation. 
IOErrorThis error is thrown when a severe I/O error has happened. 
IOExceptionSignals a general, I/O-related error. 
IsolatedContextA mock context which prevents its users from talking to the rest of the device while stubbing enough methods to satify code that tries to talk to other packages. 
Iterable<T>Instances of classes that implement this interface can be used with the enhanced for loop. 
Iterator<E>An iterator over a sequence of objects, such as a collection. 
IvParameterSpecThe algorithm parameter specification for an initialization vector

J

JarEntryRepresents a single file in a JAR archive together with the manifest attributes and digital signatures associated with it. 
JarExceptionThis runtime exception is thrown when a problem occurs while reading a JAR file. 
JarFileJarFile is used to read jar entries and their associated data from jar files. 
JarInputStreamThe input stream from which the JAR file to be read may be fetched. 
JarOutputStreamThe JarOutputStream is used to write data in the JarFile format to an arbitrary output stream  
JarURLConnectionThis class establishes a connection to a jar: URL using the JAR protocol. 
JetPlayerJetPlayer provides access to JET content playback and control. 
JetPlayer.OnJetEventListenerHandles the notification when the JET engine generates an event. 
JSONArrayA dense indexed sequence of values. 
JSONExceptionThrown to indicate a problem with the JSON API. 
JSONObjectA modifiable set of name/value mappings. 
JSONStringerImplements toString() and toString()
JSONTokenerParses a JSON (RFC 4627) encoded string into the corresponding object. 
JsPromptResultPublic class for handling javascript prompt requests. 
JsResult 

K

KeyKey is the common interface for all keys. 
KeyAgreementThis class provides the functionality for a key exchange protocol. 
KeyAgreementSpiThe Service Provider Interface (SPI) definition for the KeyAgreement class. 
KeyboardLoads an XML description of a keyboard and stores the attributes of the keys. 
Keyboard.KeyClass for describing the position and characteristics of a single key in the keyboard. 
Keyboard.RowContainer for keys in the keyboard. 
KeyboardViewA view that renders a virtual Keyboard
KeyboardView.OnKeyboardActionListenerListener for virtual keyboard events. 
KeyCharacterMapDescribes the keys provided by a device and their associated labels. 
KeyCharacterMap.KeyData 
KeyEventObject used to report key and button events. 
KeyEvent.Callback 
KeyEvent.DispatcherStateUse with dispatch(Callback, DispatcherState, Object) for more advanced key dispatching, such as long presses. 
KeyExceptionKeyException is the common superclass of all key related exceptions. 
KeyFactoryKeyFactory is an engine class that can be used to translate between public and private key objects and convert keys between their external representation, that can be easily transported and their internal representation. 
KeyFactorySpiKeyFactorySpi is the Service Provider Interface (SPI) definition for KeyFactory
KeyGeneratorThis class provides the public API for generating symmetric cryptographic keys. 
KeyGeneratorSpiThe Service Provider Interface (SPI) definition for the KeyGenerator class. 
KeyguardManagerClass that can be used to lock and unlock the keyboard. 
KeyguardManager.KeyguardLockHandle returned by newKeyguardLock(String) that allows you to disable / reenable the keyguard. 
KeyguardManager.OnKeyguardExitResultCallback passed to exitKeyguardSecurely(KeyguardManager.OnKeyguardExitResult) to notify caller of result. 
KeyListenerInterface for converting text key events into edit operations on an Editable class. 
KeyManagementExceptionKeyManagementException is a general exception, thrown to indicate an exception during processing an operation concerning key management. 
KeyManagerThis is the interface to implement in order to mark a class as a JSSE key managers so that key managers can be easily grouped. 
KeyManagerFactoryThe public API for KeyManagerFactory implementations. 
KeyManagerFactorySpiThe Service Provider Interface (SPI) for the KeyManagerFactory class. 
KeyPairKeyPair is a container for a public key and a private key. 
KeyPairGeneratorKeyPairGenerator is an engine class which is capable of generating a private key and its related public key utilizing the algorithm it was initialized with. 
KeyPairGeneratorSpiKeyPairGeneratorSpi is the Service Provider Interface (SPI) definition for KeyPairGenerator
KeyRepKeyRep is a standardized representation for serialized Key objects. 
KeyRep.TypeType enumerates the supported key types. 
KeySpecThe marker interface for key specifications. 
KeyStoreKeyStore is responsible for maintaining cryptographic keys and their owners. 
KeyStore.BuilderBuilder is used to construct new instances of KeyStore
KeyStore.CallbackHandlerProtectionCallbackHandlerProtection is a ProtectionParameter that encapsulates a CallbackHandler
KeyStore.EntryEntry is the common marker interface for a KeyStore entry. 
KeyStore.LoadStoreParameterLoadStoreParameter represents a parameter that specifies how a KeyStore can be loaded and stored. 
KeyStore.PasswordProtectionPasswordProtection is a ProtectionParameter that protects a KeyStore using a password. 
KeyStore.PrivateKeyEntryPrivateKeyEntry represents a KeyStore entry that holds a private key. 
KeyStore.ProtectionParameterProtectionParameter is a marker interface for protection parameters. 
KeyStore.SecretKeyEntrySecretKeyEntry represents a KeyStore entry that holds a secret key. 
KeyStore.TrustedCertificateEntryTrustedCertificateEntry represents a KeyStore entry that holds a trusted certificate. 
KeyStoreBuilderParametersThe parameters for KeyManagers. 
KeyStoreExceptionKeyStoreException is a general KeyStore exception. 
KeyStoreSpiKeyStoreSpi is the Service Provider Interface (SPI) definition for KeyStore

L

LabeledIntentA special subclass of Intent that can have a custom label/icon associated with it. 
LangUtilsA set of utility methods to help produce consistent equals and hashCode methods. 
LargeTestMarks a test that should run as part of the large tests. 
LastOwnerExceptionThe exception that is thrown when an attempt is made to remove the the last Owner from an Owner
LauncherActivityDisplays a list of all activities which can be performed for a given intent. 
LauncherActivity.IconResizerUtility class to resize icons to match default icon size. 
LauncherActivity.ListItemAn item in the list  
LaxContentLengthStrategyThe lax implementation of the content length strategy. 
LayerDrawableA Drawable that manages an array of other Drawables. 
LayeredSocketFactoryA SocketFactory for layered sockets (SSL/TLS). 
LayerRasterizer 
LayoutA base class that manages text layout in visual elements on the screen. 
Layout.Alignment 
Layout.DirectionsStores information about bidirectional (left-to-right or right-to-left) text within the layout of a line. 
LayoutAnimationControllerA layout animation controller is used to animated a layout's, or a view group's, children. 
LayoutAnimationController.AnimationParametersThe set of parameters that has to be attached to each view contained in the view group animated by the layout animation controller. 
LayoutInflaterThis class is used to instantiate layout XML file into its corresponding View objects. 
LayoutInflater.Factory 
LayoutInflater.FilterHook to allow clients of the LayoutInflater to restrict the set of Views that are allowed to be inflated. 
LDAPCertStoreParametersThe parameters to initialize a LDAP CertStore instance. 
LeadingMarginSpanA paragraph style affecting the leading margin. 
LeadingMarginSpan.LeadingMarginSpan2An extended version of LeadingMarginSpan, which allows the implementor to specify the number of lines of text to which this object is attached that the "first line of paragraph" margin width will be applied to. 
LeadingMarginSpan.StandardThe standard implementation of LeadingMarginSpan, which adjusts the margin but does not do any rendering. 
LevelLevel objects are used to indicate the level of logging. 
LevelListDrawableA resource that manages a number of alternate Drawables, each assigned a maximum numerical value. 
LexicalHandlerSAX2 extension handler for lexical events. 
LightingColorFilter 
LinearGradient 
LinearInterpolatorAn interpolator where the rate of change is constant  
LinearLayoutA Layout that arranges its children in a single column or a single row. 
LinearLayout.LayoutParamsPer-child layout information associated with ViewLinearLayout. 
LineBackgroundSpan 
LineFormatterInterface for formatting elements of the HEAD section of an HTTP message. 
LineHeightSpan 
LineHeightSpan.WithDensity 
LineNumberInputStream This class is deprecated. Use LineNumberReader  
LineNumberReaderWraps an existing Reader and counts the line terminators encountered while reading the data. 
LineParserInterface for parsing lines in the HEAD section of an HTTP message. 
LinkageErrorLinkageError is the superclass of all error classes that occur when loading and linking class files. 
LinkedBlockingDeque<E>An optionally-bounded blocking deque based on linked nodes. 
LinkedBlockingQueue<E>An optionally-bounded blocking queue based on linked nodes. 
LinkedHashMap<K, V>LinkedHashMap is an implementation of Map that guarantees iteration order. 
LinkedHashSet<E>LinkedHashSet is a variant of HashSet. 
LinkedList<E>LinkedList is an implementation of List, backed by a doubly-linked list. 
LinkifyLinkify take a piece of text and a regular expression and turns all of the regex matches in the text into clickable links. 
Linkify.MatchFilterMatchFilter enables client code to have more control over what is allowed to match and become a link, and what is not. 
Linkify.TransformFilterTransformFilter enables client code to have more control over how matched patterns are represented as URLs. 
LinkMovementMethod 
List<E>A List is a collection which maintains an ordering for its elements. 
ListActivityAn activity that displays a list of items by binding to a data source such as an array or Cursor, and exposes event handlers when the user selects an item. 
ListAdapterExtended Adapter that is the bridge between a ListView and the data that backs the list. 
ListIterator<E>An ListIterator is used to sequence over a List of objects. 
ListPreferenceA Preference that displays a list of entries as a dialog. 
ListResourceBundleListResourceBundle is the abstract superclass of classes which provide resources by implementing the getContents() method to return the list of resources. 
ListViewA view that shows items in a vertically scrolling list. 
ListView.FixedViewInfoA class that represents a fixed view in a list, for example a header at the top or a footer at the bottom. 
LiveFolders

A LiveFolder is a special folder whose content is provided by a ContentProvider

LocalActivityManagerHelper class for managing multiple running embedded activities in the same process. 
LocaleLocale represents a language/country/variant combination. 
LocalServerSocketnon-standard class for creating inbound UNIX-domain socket on the Android platform, this is created in the Linux non-filesystem namespace. 
LocalSocketCreates a (non-server) socket in the UNIX-domain namespace. 
LocalSocketAddressA UNIX-domain (AF_LOCAL) socket address. 
LocalSocketAddress.NamespaceThe namespace that this address exists in. 
LocationA class representing a geographic location sensed at a particular time (a "fix"). 
LocationListenerUsed for receiving notifications from the LocationManager when the location has changed. 
LocationManagerThis class provides access to the system location services. 
LocationProviderAn abstract superclass for location providers. 
LocatorInterface for associating a SAX event with a document location. 
Locator2SAX2 extension to augment the entity information provided though a Locator
Locator2ImplSAX2 extension helper for holding additional Entity information, implementing the Locator2 interface. 
LocatorImplProvide an optional convenience implementation of Locator. 
LockLock implementations provide more extensive locking operations than can be obtained using synchronized methods and statements. 
LockSupportBasic thread blocking primitives for creating locks and other synchronization classes. 
LogAPI for sending log output. 
LoggerLoggers are used to log records to a variety of destinations such as log files or the console. 
LoggingMXBeanLoggingMXBean is the management interface for the logging sub-system. 
LoggingPermissionThe permission required to control the logging when run with a SecurityManager
LoggingSessionInputBufferLogs all data read to the wire LOG. 
LoggingSessionOutputBufferLogs all data written to the wire LOG. 
LoginExceptionBase class for exceptions that are thrown when a login error occurs. 
LoginFilterAbstract class for filtering login-related text (user names and passwords)  
LoginFilter.PasswordFilterGMailThis filter is compatible with GMail passwords which restricts characters to the Latin-1 (ISO8859-1) char set. 
LoginFilter.UsernameFilterGenericThis filter rejects characters in the user name that are not compatible with Google login. 
LoginFilter.UsernameFilterGMailThis filter rejects characters in the user name that are not compatible with GMail account creation. 
LogManagerLogManager is used to maintain configuration properties of the logging framework, and to manage a hierarchical namespace of all named Logger objects. 
LogPrinterImplementation of a Printer that sends its output to the system log. 
LogRecordA LogRecord object represents a logging request. 
LongThe wrapper for the primitive type long
LongBufferA buffer of longs. 
LooperClass used to run a message loop for a thread. 
LSExceptionParser or write operations may throw an LSException if the processing is stopped. 
LSInputThis interface represents an input source for data. 
LSOutputThis interface represents an output destination for data. 
LSParserAn interface to an object that is able to build, or augment, a DOM tree from various input sources. 
LSParserFilterLSParserFilters provide applications the ability to examine nodes as they are being constructed while parsing. 
LSResourceResolverLSResourceResolver provides a way for applications to redirect references to external resources. 
LSSerializerA LSSerializer provides an API for serializing (writing) a DOM document out into XML. 

M

MacThis class provides the public API for Message Authentication Code (MAC) algorithms. 
MacSpiThe Service-Provider Interface (SPI) definition for the Mac class. 
MailToMailTo URL parser This class parses a mailto scheme URL and then can be queried for the parsed parameters. 
MalformedChallengeExceptionSignals that authentication challenge is in some way invalid or illegal in the given context 
MalformedChunkCodingExceptionSignals a malformed chunked stream. 
MalformedCookieExceptionSignals that a cookie is in some way invalid or illegal in a given context 
MalformedInputExceptionA MalformedInputException is thrown when a malformed input is encountered, for example if a byte sequence is illegal for the given charset. 
MalformedParameterizedTypeExceptionIndicates that a malformed parameterized type has been encountered by a reflective method. 
MalformedURLExceptionThis exception is thrown when a program attempts to create an URL from an incorrect specification. 
ManagedClientConnectionA client-side connection with advanced connection logic. 
ManagerFactoryParametersThe marker interface for key manager factory parameters. 
Manifest 
ManifestThe Manifest class is used to obtain attribute information for a JarFile and its entries. 
Manifest.permission 
Manifest.permission_group 
Map<K, V>A Map is a data structure consisting of a set of keys and values in which each key is mapped to a single value. 
Map.Entry<K, V>Map.Entry is a key/value mapping contained in a Map
MappedByteBufferMappedByteBuffer is a special kind of direct byte buffer which maps a region of file to memory. 
MaskFilterMaskFilter is the base class for object that perform transformations on an alpha-channel mask before drawing it. 
MaskFilterSpan 
MatcherThe result of applying a Pattern to a given input. 
MatchResultHolds the results of a successful match of a Pattern against a given string. 
MathClass Math provides basic math constants and operations such as trigonometric functions, hyperbolic functions, exponential, logarithms, etc. 
MathContextImmutable objects describing settings such as rounding mode and digit precision for the numerical operations provided by class BigDecimal
MatrixThe Matrix class holds a 3x3 matrix for transforming coordinates. 
MatrixMatrix math utilities. 
Matrix.ScaleToFitControlls how the src rect should align into the dst rect for setRectToRect(). 
MatrixCursorA mutable cursor implementation backed by an array of Objects. 
MatrixCursor.RowBuilderBuilds a row, starting from the left-most column and adding one column value at a time. 
MediaControllerA view containing controls for a MediaPlayer. 
MediaController.MediaPlayerControl 
MediaPlayerMediaPlayer class can be used to control playback of audio/video files and streams. 
MediaPlayer.OnBufferingUpdateListenerInterface definition of a callback to be invoked indicating buffering status of a media resource being streamed over the network. 
MediaPlayer.OnCompletionListenerInterface definition for a callback to be invoked when playback of a media source has completed. 
MediaPlayer.OnErrorListenerInterface definition of a callback to be invoked when there has been an error during an asynchronous operation (other errors will throw exceptions at method call time). 
MediaPlayer.OnInfoListenerInterface definition of a callback to be invoked to communicate some info and/or warning about the media or its playback. 
MediaPlayer.OnPreparedListenerInterface definition for a callback to be invoked when the media source is ready for playback. 
MediaPlayer.OnSeekCompleteListenerInterface definition of a callback to be invoked indicating the completion of a seek operation. 
MediaPlayer.OnVideoSizeChangedListenerInterface definition of a callback to be invoked when the video size is first known or updated  
MediaRecorderUsed to record audio and video. 
MediaRecorder.AudioEncoderDefines the audio encoding. 
MediaRecorder.AudioSourceDefines the audio source. 
MediaRecorder.OnErrorListenerInterface definition for a callback to be invoked when an error occurs while recording. 
MediaRecorder.OnInfoListenerInterface definition for a callback to be invoked when an error occurs while recording. 
MediaRecorder.OutputFormatDefines the output format. 
MediaRecorder.VideoEncoderDefines the video encoding. 
MediaRecorder.VideoSourceDefines the video source. 
MediaScannerConnectionMediaScannerConnection provides a way for applications to pass a newly created or downloaded media file to the media scanner service. 
MediaScannerConnection.MediaScannerConnectionClientAn interface for notifying clients of MediaScannerConnection when a connection to the MediaScanner service has been established and when the scanning of a file has completed. 
MediaScannerConnection.OnScanCompletedListenerInterface for notifying clients of the result of scanning a requested media file. 
MediaStoreThe Media provider contains meta data for all available media on both internal and external storage devices. 
MediaStore.AudioContainer for all audio content. 
MediaStore.Audio.AlbumColumnsColumns representing an album  
MediaStore.Audio.AlbumsContains artists for audio files  
MediaStore.Audio.ArtistColumnsColumns representing an artist  
MediaStore.Audio.ArtistsContains artists for audio files  
MediaStore.Audio.Artists.AlbumsSub-directory of each artist containing all albums on which a song by the artist appears. 
MediaStore.Audio.AudioColumnsColumns for audio file that show up in multiple tables. 
MediaStore.Audio.GenresContains all genres for audio files  
MediaStore.Audio.Genres.MembersSub-directory of each genre containing all members. 
MediaStore.Audio.GenresColumnsColumns representing an audio genre  
MediaStore.Audio.Media 
MediaStore.Audio.PlaylistsContains playlists for audio files  
MediaStore.Audio.Playlists.MembersSub-directory of each playlist containing all members. 
MediaStore.Audio.PlaylistsColumnsColumns representing a playlist  
MediaStore.ImagesContains meta data for all available images. 
MediaStore.Images.ImageColumns 
MediaStore.Images.Media 
MediaStore.Images.ThumbnailsThis class allows developers to query and get two kinds of thumbnails: MINI_KIND: 512 x 384 thumbnail MICRO_KIND: 96 x 96 thumbnail  
MediaStore.MediaColumnsCommon fields for most MediaProvider tables  
MediaStore.Video 
MediaStore.Video.Media 
MediaStore.Video.ThumbnailsThis class allows developers to query and get two kinds of thumbnails: MINI_KIND: 512 x 384 thumbnail MICRO_KIND: 96 x 96 thumbnail  
MediaStore.Video.VideoColumns 
MediumTestMarks a test that should run as part of the medium tests. 
MemberCommon interface providing access to reflective information on class members. 
MemoryFileMemoryFile is a wrapper for the Linux ashmem driver. 
MemoryHandlerA Handler put the description of log events into a cycled memory buffer. 
MenuInterface for managing the items in a menu. 
MenuInflaterThis class is used to instantiate menu XML files into Menu objects. 
MenuItemInterface for direct access to a previously created menu item. 
MenuItem.OnMenuItemClickListenerInterface definition for a callback to be invoked when a menu item is clicked. 
MergeCursorA convience class that lets you present an array of Cursors as a single linear Cursor. 
MessageDefines a message containing a description and arbitrary data object that can be sent to a Handler
MessageDigestUses a one-way hash function to turn an arbitrary number of bytes into a fixed-length byte sequence. 
MessageDigestSpiMessageDigestSpi is the Service Provider Interface (SPI) definition for MessageDigest
MessageFormatProduces concatenated messages in language-neutral way. 
MessageFormat.FieldThe instances of this inner class are used as attribute keys in AttributedCharacterIterator that the formatToCharacterIterator(Object) method returns. 
MessageQueueLow-level class holding the list of messages to be dispatched by a Looper
MessageQueue.IdleHandlerCallback interface for discovering when a thread is going to block waiting for more messages. 
MessengerReference to a Handler, which others can use to send messages to it. 
MetaKeyKeyListenerThis base class encapsulates the behavior for handling the meta keys (shift and alt) and the pseudo-meta state of selecting text. 
MethodThis class represents a method. 
MethodNotSupportedExceptionIndicates that an HTTP method is not supported. 
MetricAffectingSpanThe classes that affect character-level text formatting in a way that changes the width or height of characters extend this class. 
MGF1ParameterSpecThe parameter specification for the Mask Generation Function (MGF1) in the RSA-PSS Signature and OAEP Padding scheme. 
MimeTypeMapTwo-way map that maps MIME-types to file extensions and vice versa. 
MissingFormatArgumentExceptionA MissingFormatArgumentException will be thrown if there is no corresponding argument with the specified conversion or an argument index that refers to a missing argument. 
MissingFormatWidthExceptionA MissingFormatWidthException will be thrown if the format width is missing but is required. 
MissingResourceExceptionA MissingResourceException is thrown by ResourceBundle when a resource bundle cannot be found or a resource is missing from a resource bundle. 
MockApplicationA mock Application class. 
MockContentProviderMock implementation of ContentProvider. 
MockContentResolver

An extension of ContentResolver that is designed for testing. 

MockContextA mock Context class. 
MockCursor

A mock Cursor class that isolates the test code from real Cursor implementation. 

MockDialogInterfaceA mock DialogInterface class. 
MockPackageManagerA mock PackageManager class. 
MockResourcesA mock Resources class. 
ModifierThis class provides static methods to decode class and member modifiers. 
MonthDisplayHelperHelps answer common questions that come up when displaying a month in a 6 row calendar grid format. 
MoreAssertsContains additional assertion methods not found in JUnit. 
MotionEventObject used to report movement (mouse, pen, finger, trackball) events. 
MotionEvent.PointerCoordsTransfer object for pointer coordinates. 
MovementMethod 
Movie 
MultiAutoCompleteTextViewAn editable text view, extending AutoCompleteTextView, that can show completion suggestions for the substring of the text where the user is typing instead of necessarily for the entire thing. 
MultiAutoCompleteTextView.CommaTokenizerThis simple Tokenizer can be used for lists where the items are separated by a comma and one or more spaces. 
MultiAutoCompleteTextView.Tokenizer 
MulticastSocketThis class implements a multicast socket for sending and receiving IP multicast datagram packets. 
MultihomePlainSocketFactorySocket factory that implements a simple multi-home fail-over on connect failure, provided the same hostname resolves to multiple InetAddresses. 
MultiTapKeyListenerThis is the standard key listener for alphabetic input on 12-key keyboards. 
MutableContextWrapperSpecial version of ContextWrapper that allows the base context to be modified after it is initially set. 

N

NamedNodeMapObjects implementing the NamedNodeMap interface are used to represent collections of nodes that can be accessed by name. 
NameListThe NameList interface provides the abstraction of an ordered collection of parallel pairs of name and namespace values (which could be null values), without defining or constraining how this collection is implemented. 
NamespaceContext

Interface for read only XML Namespace context processing. 

NamespaceSupportEncapsulate Namespace logic for use by applications using SAX, or internally by SAX drivers. 
NameValuePairA simple class encapsulating an attribute/value pair. 
NativeActivityConvenience for implementing an activity that will be implemented purely in native code. 
NavigableMap<K, V>NavigableMap is a SortedMap with navigation methods answering the closest matches for specified item. 
NavigableSet<E>NavigableSet is a SortedSet with navigation methods answering the closest matches for specified item. 
NClob 
NdefMessageRepresents an NDEF (NFC Data Exchange Format) data message that contains one or more NdefRecords. 
NdefRecordRepresents a logical (unchunked) NDEF (NFC Data Exchange Format) record. 
NegativeArraySizeExceptionThrown when an attempt is made to create an array with a size of less than zero. 
NeighboringCellInfoRepresents the neighboring cell information, including Received Signal Strength and Cell ID location. 
NetPermissionThis class represents permissions to configure the access to network resources. 
NetscapeDomainHandler 
NetscapeDraftHeaderParser 
NetscapeDraftSpecNetscape cookie draft compliant cookie policy 
NetscapeDraftSpecFactory 
NetworkErrorException 
NetworkInfoDescribes the status of a network interface of a given type (currently either Mobile or Wifi). 
NetworkInfo.DetailedStateThe fine-grained state of a network connection. 
NetworkInfo.StateCoarse-grained network state. 
NetworkInterfaceThis class is used to represent a network interface of the local device. 
NfcAdapterRepresents the device's local NFC adapter. 
NinePatchThe NinePatch class permits drawing a bitmap in nine sections. 
NinePatchDrawableA resizeable bitmap, with stretchable areas that you define. 
NoClassDefFoundErrorThrown when the virtual machine is unable to locate a class which it has been asked to load. 
NoConnectionPendingExceptionA NoConnectionPendingException is thrown if SocketChannel's finishConnect method is called before the SocketChannel's connect(java.net.SocketAddress) connect} method completed without error. 
NoConnectionReuseStrategyA strategy that never re-uses a connection. 
NoCopySpanThis interface should be added to a span object that should not be copied into a new Spenned when performing a slice or copy operation on the original Spanned it was placed in. 
NoCopySpan.ConcreteConvenience equivalent for when you would just want a new Object() for a span but want it to be no-copy. 
NodeThe Node interface is the primary datatype for the entire Document Object Model. 
NodeChangeEventThis is the event class to indicate that one child of the preference node has been added or deleted. 
NodeChangeListenerThis interface is used to handle preference node change events. 
NodeListThe NodeList interface provides the abstraction of an ordered collection of nodes, without defining or constraining how this collection is implemented. 
NoHttpResponseException

Signals that the target server failed to respond with a valid HTTP response. 

NonReadableChannelExceptionA NonReadableChannelException is thrown when attempting to read from a channel that is not open for reading. 
NonRepeatableRequestExceptionSignals failure to retry the request due to non-repeatable request entity. 
NonWritableChannelExceptionA NonWritableChannelException is thrown when attempting to write to a channel that is not open for writing. 
NormalizerProvides normalization functions according to Unicode Standard Annex #15: Unicode Normalization Forms
Normalizer.FormThe normalization forms supported by the Normalizer. 
NoRouteToHostExceptionThe NoRouteToHostException will be thrown while attempting to connect to a remote host but the host cannot be reached for instance because of a badly configured router or a blocking firewall. 
NoSuchAlgorithmExceptionNoSuchAlgorithmException indicates that a requested algorithm could not be found. 
NoSuchElementExceptionA NoSuchElementException is thrown when trying to retrieve an element past the end of an Enumeration, or the first or last element from an empty Vector. 
NoSuchFieldErrorThrown when the virtual machine notices that a program tries to reference, on a class or object, a field that does not exist. 
NoSuchFieldExceptionThrown when the virtual machine notices that a program tries to reference, on a class or object, a field that does not exist. 
NoSuchMethodErrorThrown when the virtual machine notices that a program tries to reference, on a class or object, a method that does not exist. 
NoSuchMethodExceptionThrown when the virtual machine notices that a program tries to reference, on a class or object, a method that does not exist. 
NoSuchPaddingExceptionThe exception that is thrown when the requested padding mechanism is not supported. 
NoSuchProviderExceptionNoSuchProviderException indicates that a requested security provider could not be found. 
NotActiveExceptionSignals that a serialization-related method has been invoked in the wrong place. 
NotationThis interface represents a notation declared in the DTD. 
NotificationA class that represents how a persistent notification is to be presented to the user using the NotificationManager
NotificationManagerClass to notify the user of events that happen. This is how you tell the user that something has happened in the background.  
NotOwnerExceptionThe exception that is thrown when an action that requires ownership is attempted by a principal that is not an owner of the object for which ownership is required. 
NotSerializableExceptionSignals that an object that is not serializable has been passed into the ObjectOutput.writeObject() method. 
NotYetBoundExceptionA NotYetBoundException is thrown if the server socket channel is not bound before an I/O operation is made. 
NotYetConnectedExceptionA NotYetConnectedException is thrown if the socket channel is not connected before an I/O operation is invoked. 
NTCredentialsCredentials specific to the Windows platform. 
NTLMEngineAbstract NTLM authentication engine. 
NTLMEngineExceptionSignals NTLM protocol failure. 
NTLMScheme 
NTUserPrincipalNT (MS Windows specific) user principal used for HTTP authentication 
NullCipherThis class provides an identity cipher that does not transform the input data in any way. 
NullPointerExceptionThrown when a program tries to access a field or method of an object or an element of an array when there is no instance or array to use, that is if the object or array points to null
NumberThe abstract superclass of the classes which represent numeric base types (that is Byte, Short, Integer, Long, Float, and Double
NumberFormatThe abstract base class for all number formats. 
NumberFormat.FieldThe instances of this inner class are used as attribute keys and values in AttributedCharacterIterator that the formatToCharacterIterator(Object) method returns. 
NumberFormatExceptionThrown when an invalid value is passed to a string-to-number conversion method. 
NumberKeyListenerFor numeric text entry  
NumericShaperThe Class NumericShaper provides methods to convert latin character codes to unicode character codes. 

O

OAEPParameterSpecThe algorithm parameter specification for the OAEP Padding algorithm. 
ObbInfoBasic information about a Opaque Binary Blob (OBB) that reflects the info from the footer on the OBB file. 
ObbScannerClass to scan Opaque Binary Blob (OBB) files. 
ObjectThe root class of the Java class hierarchy. 
ObjectInputDefines an interface for classes that allow reading serialized objects. 
ObjectInputStreamA specialized InputStream that is able to read (deserialize) Java objects as well as primitive data types (int, byte, char etc.). 
ObjectInputStream.GetFieldGetField is an inner class that provides access to the persistent fields read from the source stream. 
ObjectInputValidationA callback interface for post-deserialization checks on objects. 
ObjectOutputDefines an interface for classes that allow reading serialized objects. 
ObjectOutputStreamA specialized OutputStream that is able to write (serialize) Java objects as well as primitive data types (int, byte, char etc.). 
ObjectOutputStream.PutFieldPutField is an inner class to provide access to the persistent fields that are written to the target stream. 
ObjectStreamClassRepresents a descriptor for identifying a class during serialization and deserialization. 
ObjectStreamConstantsA helper interface with constants used by the serialization implementation. 
ObjectStreamExceptionSignals some sort of problem during either serialization or deserialization of objects. 
ObjectStreamFieldDescribes a field for the purpose of serialization. 
Observable<T>Provides methods for (un)registering arbitrary observers in an ArrayList. 
ObservableObservable is used to notify a group of Observer objects when a change occurs. 
ObserverObserver is the interface to be implemented by objects that receive notification of updates on an Observable object. 
OnAccountsUpdateListenerAn interface that contains the callback used by the AccountMonitor  
OnObbStateChangeListenerUsed for receiving notifications from StorageManager about OBB file states. 
OpcodesThis is a list of Dalvik opcodes. 
OpenableColumnsThese are standard columns for openable URIs. 
OperatedClientConnectionA client-side connection that relies on outside logic to connect sockets to the appropriate hosts. 
OperationApplicationExceptionThrown when an application of a ContentProviderOperation fails due the specified constraints. 
OperationCanceledException 
OptionalDataExceptionSignals that the ObjectInputStream class encountered a primitive type (int, char etc.) instead of an object instance in the input stream. 
OrientationEventListenerHelper class for receiving notifications from the SensorManager when the orientation of the device has changed. 
OrientationListener This class is deprecated. use OrientationEventListener instead. This class internally uses the OrientationEventListener.  
OrientedBoundingBoxAn oriented bounding box  
OutOfMemoryErrorThrown when a request for memory is made that can not be satisfied using the available platform resources. 
OutputKeysProvides string constants that can be used to set output properties for a Transformer, or to retrieve output properties from a Transformer or Templates object. 
OutputStreamThe base class for all output streams. 
OutputStreamWriterA class for turning a character stream into a byte stream. 
OvalShapeDefines an oval shape. 
OverlappingFileLockExceptionAn OverlappingFileLockException is thrown when attempting to acquire a lock that overlaps an existing or pending lock held by this process. 
OverrideAnnotation type used to mark methods that override a method declaration in a superclass. 
OverScrollerThis class encapsulates scrolling with the ability to overshoot the bounds of a scrolling operation. 
OvershootInterpolatorAn interpolator where the change flings forward and overshoots the last value then comes back. 
OwnerThe interface to manage owners of objects that require ownership. 

P

Pack200Class factory for Pack200.Packer and Pack200.Unpacker
Pack200.PackerThe interface defining the API for converting a JAR file to an output stream in the Pack200 format. 
Pack200.UnpackerThe interface defining the API for converting a packed stream in the Pack200 format to a JAR file. 
PackageContains information about a Java package. 
PackageInfoOverall information about the contents of a package. 
PackageItemInfoBase class containing information common to all package items held by the package manager. 
PackageItemInfo.DisplayNameComparator 
PackageManagerClass for retrieving various kinds of information related to the application packages that are currently installed on the device. 
PackageManager.NameNotFoundExceptionThis exception is thrown when a given package, application, or component name can not be found. 
PackageStatsimplementation of PackageStats associated with a application package. 
PaintThe Paint class holds the style and color information about how to draw geometries, text and bitmaps. 
Paint.AlignAlign specifies how drawText aligns its text relative to the [x,y] coordinates. 
Paint.CapThe Cap specifies the treatment for the beginning and ending of stroked lines and paths. 
Paint.FontMetricsClass that describes the various metrics for a font at a given text size. 
Paint.FontMetricsIntConvenience method for callers that want to have FontMetrics values as integers. 
Paint.JoinThe Join specifies the treatment where lines and curve segments join on a stroked path. 
Paint.StyleThe Style specifies if the primitive being drawn is filled, stroked, or both (in the same color). 
PaintDrawableDrawable that draws its bounds in the given paint, with optional rounded corners. 
PaintFlagsDrawFilter 
Pair<F, S>Container to ease passing around a tuple of two objects. 
ParagraphStyleThe classes that affect paragraph-level text formatting implement this interface. 
ParameterizedTypeThis interface represents a parameterized type such as 'Set<String>'
ParameterMetaDataAn interface used to get information about the types and properties of parameters in a PreparedStatement
ParcelContainer for a message (data and object references) that can be sent through an IBinder. 
ParcelableInterface for classes whose instances can be written to and restored from a Parcel
Parcelable.Creator<T>Interface that must be implemented and provided as a public CREATOR field that generates instances of your Parcelable class from a Parcel. 
ParcelableSpanA special kind of Parcelable for objects that will serve as text spans. 
ParcelFileDescriptorThe FileDescriptor returned by readFileDescriptor(), allowing you to close it when done with it. 
ParcelFileDescriptor.AutoCloseInputStreamAn InputStream you can create on a ParcelFileDescriptor, which will take care of calling ParcelFileDescriptor.close() for you when the stream is closed. 
ParcelFileDescriptor.AutoCloseOutputStreamAn OutputStream you can create on a ParcelFileDescriptor, which will take care of calling ParcelFileDescriptor.close() for you when the stream is closed. 
ParcelFormatExceptionThe contents of a Parcel (usually during unmarshalling) does not contain the expected data. 
ParcelUuidThis class is a Parcelable wrapper around UUID which is an immutable representation of a 128-bit universally unique identifier. 
ParseExceptionWhen WebAddress Parser Fails, this exception is thrown  
ParseExceptionThrown when the string being parsed is not in the correct form. 
ParseExceptionIndicates a parse error. 
ParsePositionTracks the current position in a parsed string. 
Parser This interface is deprecated. This interface has been replaced by the SAX2 XMLReader interface, which includes Namespace support. 
ParserAdapterAdapt a SAX1 Parser as a SAX2 XMLReader. 
ParserConfigurationExceptionIndicates a serious configuration error. 
ParserCursorThis class represents a context of a parsing operation:
  • the current position the parsing operation is expected to start at
  • the bounds limiting the scope of the parsing operation
 
ParserFactory This class is deprecated. This class works with the deprecated Parser interface. 
PasswordAuthenticationThis immutable class is a data structure that encapsulates username and password which is used by the Authenticator class. 
PasswordCallbackUsed in conjunction with a CallbackHandler to retrieve a password when needed. 
PasswordTransformationMethod 
PathThe Path class encapsulates compound (multiple contour) geometric paths consisting of straight line segments, quadratic curves, and cubic curves. 
Path.DirectionSpecifies how closed shapes (e.g. 
Path.FillTypeEnum for the ways a path may be filled  
PathClassLoaderProvides a simple ClassLoader implementation that operates on a list of files and directories in the local file system, but does not attempt to load classes from the network. 
PathDashPathEffect 
PathDashPathEffect.Style 
PathEffectPathEffect is the base class for objects in the Paint that affect the geometry of a drawing primitive before it is transformed by the canvas' matrix and drawn. 
PathMeasure 
PathPermissionDescription of permissions needed to access a particular path in a ProviderInfo
PathShapeCreates geometric paths, utilizing the Path class. 
PatternPatterns are compiled regular expressions. 
PatternMatcherA simple pattern matcher, which is safe to use on untrusted data: it does not provide full reg-exp support, only simple globbing that can not be used maliciously. 
PatternsCommonly used regular expression patterns. 
PatternSyntaxExceptionEncapsulates a syntax error that occurred during the compilation of a Pattern
PBEKeyThe interface to a password-based-encryption key. 
PBEKeySpecThe key specification for a password based encryption key. 
PBEParameterSpecThe algorithm parameter specification for a password based encryption algorithm. 
PendingIntentA description of an Intent and target action to perform with it. 
PendingIntent.CanceledExceptionException thrown when trying to send through a PendingIntent that has been canceled or is otherwise no longer able to execute the request. 
PendingIntent.OnFinishedCallback interface for discovering when a send operation has completed. 
PerformanceTestCaseMore complex interface performance for test cases. 
PerformanceTestCase.IntermediatesCallbacks for PerformanceTestCase
PeriodicSyncValue type that contains information about a periodic sync. 
PermissionPermission is the common base class of all permissions that participate in the access control security framework around AccessController and AccessControlContext
PermissionThe interface that represents a permission. 
PermissionCollectionPermissionCollection is the common base class for all collections that provide a convenient method for determining whether or not a given permission is implied by any of the permissions present in this collection. 
PermissionGroupInfoInformation you can retrieve about a particular security permission group known to the system. 
PermissionInfoInformation you can retrieve about a particular security permission known to the system. 
PermissionsPermissions represents a PermissionCollection where the contained permissions can be of different types. 
PhantomReference<T>Implements a phantom reference, which is the weakest of the three types of references. 
PhoneNumberFormattingTextWatcherWatches a TextView and if a phone number is entered will format it using formatNumber(Editable, int)
PhoneNumberUtilsVarious utilities for dealing with phone number strings. 
PhoneStateListenerA listener class for monitoring changes in specific telephony states on the device, including service state, signal strength, message waiting indicator (voicemail), and others. 
PictureA picture records drawing calls (via the canvas returned by beginRecording) and can then play them back (via picture.draw(canvas) or canvas.drawPicture). 
PictureDrawableDrawable subclass that wraps a Picture, allowing the picture to be used whereever a Drawable is supported. 
PipeA pipe contains two channels, forming a unidirectional pipe. 
Pipe.SinkChannelWritable sink channel used to write to a pipe. 
Pipe.SourceChannelReadable source channel used to read from a pipe. 
PipedInputStreamReceives information from a communications pipe. 
PipedOutputStreamPlaces information on a communications pipe. 
PipedReaderReceives information on a communications pipe. 
PipedWriterPlaces information on a communications pipe. 
PixelFormat 
PixelXorXfermodePixelXorXfermode implements a simple pixel xor (op ^ src ^ dst). 
PKCS8EncodedKeySpecThe key specification for an encoded private key in ASN.1 format as defined in the PKCS#8 standard. 
PKIXBuilderParametersThe parameter specification for a PKIX CertPathBuilder algorithm used to build certificate chains validated with the PKIX certification path validation. 
PKIXCertPathBuilderResultThe result of the PKIX certification path builder, returned by build(CertPathParameters)
PKIXCertPathCheckerThe class specifying the interface to extend the certification path validation algorithm by checks to perform on an X509Certificate
PKIXCertPathValidatorResultThe implementation of the result of the PKIX certification path validation. 
PKIXParametersThis class implements the parameters for the PKIX CertPathValidator
PlainSocketFactoryThe default class for creating sockets. 
Plugin This class is deprecated. This interface was intended to be used by Gears. Since Gears was deprecated, so is this class.  
Plugin.PreferencesClickHandler 
PluginData This class is deprecated. This class was intended to be used by Gears. Since Gears was deprecated, so is this class.  
PluginList This class is deprecated. This interface was intended to be used by Gears. Since Gears was deprecated, so is this class.  
PluginStubThis interface is used to implement plugins in a WebView. 
PointPoint holds two integer coordinates  
PointFPointF holds two float coordinates  
PolicyPolicy is the common super type of classes which represent a system security policy. 
Policy.ParametersA marker interface for Policy parameters. 
PolicyNodeThe interface to a valid policy tree node for the PKIX certification path validation algorithm. 
PolicyQualifierInfoThis class implements a policy qualifier as defined by the ASN.1 PolicyQualifierInfo structure. 
PolicySpiRepresents the Service Provider Interface (SPI) for java.security.Policy class. 
PooledConnectionAn interface which provides facilities for handling connections to a database which are pooled. 
PoolEntryRequestEncapsulates a request for a BasicPoolEntry
PopupWindow

A popup window that can be used to display an arbitrary view. 

PopupWindow.OnDismissListenerListener that is called when this popup window is dismissed. 
PorterDuff 
PorterDuff.Mode 
PorterDuffColorFilter 
PorterDuffXfermode 
PortUnreachableExceptionThis PortUnreachableException will be thrown if an ICMP_Port_Unreachable message has been received. 
PowerManagerThis class gives you control of the power state of the device. 
PowerManager.WakeLockClass lets you say that you need to have the device on. 
Prediction 
PreferenceRepresents the basic Preference UI building block displayed by a PreferenceActivity in the form of a ListView
Preference.BaseSavedStateA base class for managing the instance state of a Preference
Preference.OnPreferenceChangeListenerInterface definition for a callback to be invoked when the value of this Preference has been changed by the user and is about to be set and/or persisted. 
Preference.OnPreferenceClickListenerInterface definition for a callback to be invoked when a Preference is clicked. 
PreferenceActivityShows a hierarchy of Preference objects as lists, possibly spanning multiple screens. 
PreferenceCategoryUsed to group Preference objects and provide a disabled title above the group. 
PreferenceChangeEventThis is the event class to indicate that a preference has been added, deleted or updated. 
PreferenceChangeListenerThis interface is used to handle preferences change events. 
PreferenceGroupA container for multiple Preference objects. 
PreferenceManagerUsed to help create Preference hierarchies from activities or XML. 
PreferenceManager.OnActivityDestroyListenerInterface definition for a class that will be called when the container's activity is destroyed. 
PreferenceManager.OnActivityResultListenerInterface definition for a class that will be called when the container's activity receives an activity result. 
PreferenceManager.OnActivityStopListenerInterface definition for a class that will be called when the container's activity is stopped. 
PreferencesAn instance of the class Preferences represents one node in a preference tree, which provides a mechanism to store and access configuration data in a hierarchical way. 
PreferenceScreenRepresents a top-level Preference that is the root of a Preference hierarchy. 
PreferencesFactoryThis interface is used by the Preferences class as factory class to create Preferences instances. 
PreparedStatementAn interface for a precompiled SQL Statement. 
PresetReverbA sound generated within a room travels in many directions. 
PresetReverb.OnParameterChangeListenerThe OnParameterChangeListener interface defines a method called by the PresetReverb when a parameter value has changed. 
PresetReverb.SettingsThe Settings class regroups all preset reverb parameters. 
PrincipalPrincipals are objects which have identities. 
PrinterSimple interface for printing text, allowing redirection to various targets. 
PrintStreamWraps an existing OutputStream and provides convenience methods for writing common data types in a human readable format. 
PrintStreamPrinterImplementation of a Printer that sends its output to a PrintStream
PrintWriterWraps either an existing OutputStream or an existing Writer and provides convenience methods for printing common data types in a human readable format. 
PrintWriterPrinterImplementation of a Printer that sends its output to a PrintWriter
PriorityBlockingQueue<E>An unbounded blocking queue that uses the same ordering rules as class PriorityQueue and supplies blocking retrieval operations. 
PriorityQueue<E>A PriorityQueue holds elements on a priority heap, which orders the elements according to their natural order or according to the comparator specified at construction time. 
PrivateCredentialPermissionProtects private credential objects belonging to a Subject
PrivateKeyPrivateKey is the common interface for private keys. 
PrivilegedAction<T>PrivilegedAction represents an action that can be executed privileged regarding access control. 
PrivilegedActionExceptionPrivilegedActionException wraps exceptions which are thrown from within privileged operations. 
PrivilegedExceptionAction<T>PrivilegedAction represents an action, that can be executed privileged regarding access control. 
ProcessTools for managing OS processes. 
ProcessRepresents an external process. 
ProcessBuilderCreates operating system processes. 
ProcessingInstructionThe ProcessingInstruction interface represents a "processing instruction", used in XML as a way to keep processor-specific information in the text of the document. 
ProgressBar

Visual indicator of progress in some operation. 

ProgressDialog

A dialog showing a progress indicator and an optional text message or view. 

PropertiesA Properties object is a Hashtable where the keys and values must be Strings. 
PropertyChangeEventAn event that indicates that a constraint or a boundary of a property has changed. 
PropertyChangeListenerA PropertyChangeListener can subscribe with a event source. 
PropertyChangeListenerProxyThe implementation of this listener proxy just delegates the received events to its listener. 
PropertyChangeSupportThis utility class  
PropertyPermissionPropertyPermission objects represent a permission to access system properties. 
PropertyResourceBundlePropertyResourceBundle loads resources from an InputStream
ProtectableA Protectable can be run and can throw a Throwable. 
ProtectionDomainProtectionDomain represents all permissions that are granted to a specific code source. 
ProtocolExceptionSignals that either a connection attempt to a socket of the wrong type, the application of an unsupported operation or that a general error in the underlying protocol has occurred. 
ProtocolExceptionSignals that an HTTP protocol violation has occurred. 
ProtocolVersionRepresents a protocol version, as specified in RFC 2616. 
ProviderProvider is the abstract superclass for all security providers in the Java security infrastructure. 
Provider.ServiceService represents a service in the Java Security infrastructure. 
ProviderExceptionProviderException is a general exception, thrown by security Providers
ProviderInfoHolds information about a specific content provider
ProviderTestCase<T extends ContentProvider> This class is deprecated. this class extends InstrumentationTestCase but should extend AndroidTestCase. Use ProviderTestCase2, which corrects this problem, instead.  
ProviderTestCase2<T extends ContentProvider>This test case class provides a framework for testing a single ContentProvider and for testing your app code with an isolated content provider. 
ProxyA convenience class for accessing the user and default proxy settings. 
ProxyProxy defines methods for creating dynamic proxy classes and instances. 
ProxyThis class represents proxy server settings. 
Proxy.TypeEnum class for the proxy type. 
ProxySelectorSelects an applicable proxy server when connecting to a resource specified by a URL. 
ProxySelectorRoutePlannerDefault implementation of an HttpRoutePlanner
PSourceThe source of the label L as specified in PKCS #1
PSource.PSpecifiedThe explicit specification of the parameter P used in the source algorithm. 
PSSParameterSpecThe parameter specification for the RSA-PSS Signature scheme. 
PublicKeyPublicKey is the common interface for public keys. 
PushbackInputStreamWraps an existing InputStream and adds functionality to "push back" bytes that have been read, so that they can be read again. 
PushbackReaderWraps an existing Reader and adds functionality to "push back" characters that have been read, so that they can be read again. 

Q

QName

QName represents a qualified name as defined in the XML specifications: XML Schema Part2: Datatypes specification, Namespaces in XML, Namespaces in XML Errata

Queue<E>This kind of collection provides advanced operations compared to basic collections, such as insertion, extraction, and inspection. 
QuickContactBadgeWidget used to show an image with the standard QuickContact badge and on-click behavior. 
QuoteSpan 
QwertyKeyListenerThis is the standard key listener for alphabetic input on qwerty keyboards. 

R

R 
R.anim 
R.array 
R.attr 
R.bool 
R.color 
R.dimen 
R.drawable 
R.id 
R.integer 
R.layout 
R.plurals 
R.raw 
R.string 
R.style 
R.styleable 
R.xml 
RadialGradient 
RadioButton

A radio button is a two-states button that can be either checked or unchecked. 

RadioGroup

This class is used to create a multiple-exclusion scope for a set of radio buttons. 

RadioGroup.LayoutParams

This set of layout parameters defaults the width and the height of the children to WRAP_CONTENT when they are not specified in the XML file. 

RadioGroup.OnCheckedChangeListener

Interface definition for a callback to be invoked when the checked radio button changed in this group. 

RandomThis class provides methods that generates pseudo-random numbers of different types, such as int, long, double, and float
RandomAccessRandomAccess is implemented by List implementations that support fast (usually constant time) random access. 
RandomAccessFileAllows reading from and writing to a file in a random-access manner. 
Rasterizer 
RasterizerSpan 
RatingBarA RatingBar is an extension of SeekBar and ProgressBar that shows a rating in stars. 
RatingBar.OnRatingBarChangeListenerA callback that notifies clients when the rating has been changed. 
RC2ParameterSpecThe algorithm parameter specification for the RC2 algorithm. 
RC5ParameterSpecThe algorithm parameter specification for the RC5 algorithm. 
ReadableRepresents a sequence of characters that can be incrementally read (copied) into a CharBuffer
ReadableByteChannelA ReadableByteChannel is a type of Channel that can read bytes. 
ReaderThe base class for all readers. 
ReadOnlyBufferExceptionA ReadOnlyBufferException is thrown when some write operation is called on a read-only buffer. 
ReadWriteLockA ReadWriteLock maintains a pair of associated locks, one for read-only operations and one for writing. 
ReasonPhraseCatalogInterface for obtaining reason phrases for HTTP status codes. 
ReceiverCallNotAllowedExceptionThis exception is thrown from registerReceiver(BroadcastReceiver, IntentFilter) and bindService(Intent, ServiceConnection, int) when these methods are being used from an BroadcastReceiver component. 
RecognitionListenerUsed for receiving notifications from the SpeechRecognizer when the recognition related events occur. 
RecognitionServiceThis class provides a base class for recognition service implementations. 
RecognitionService.CallbackThis class receives callbacks from the speech recognition service and forwards them to the user. 
RecognizerIntentConstants for supporting speech recognition through starting an Intent  
RecoverySystemRecoverySystem contains methods for interacting with the Android recovery system (the separate partition that can be used to install system updates, wipe user data, etc.)  
RecoverySystem.ProgressListenerInterface definition for a callback to be invoked regularly as verification proceeds. 
RectRect holds four integer coordinates for a rectangle. 
RectFRectF holds four float coordinates for a rectangle. 
RectShapeDefines a rectangle shape. 
RedirectExceptionSignals violation of HTTP specification caused by an invalid redirect 
RedirectHandlerA handler for determining if an HTTP request should be redirected to a new location in response to an HTTP response received from the target server. 
RedirectLocationsA collection of URIs that were used as redirects. 
ReentrantLockA reentrant mutual exclusion Lock with the same basic behavior and semantics as the implicit monitor lock accessed using synchronized methods and statements, but with extended capabilities. 
ReentrantReadWriteLockAn implementation of ReadWriteLock supporting similar semantics to ReentrantLock
ReentrantReadWriteLock.ReadLockThe lock returned by method readLock()
ReentrantReadWriteLock.WriteLockThe lock returned by method writeLock()
RefThis interface represents an SQL Ref - a data object containing a cursor or pointer to a result table. 
Reference<T>Provides an abstract class which describes behavior common to all reference objects. 
ReferenceQueue<T>The ReferenceQueue is the container on which reference objects are enqueued when the garbage collector detects the reachability type specified for the referent. 
ReflectPermissionA ReflectPermission object represents a permission to access operations in the reflection layer. 
RefQueueHandlerCallback handler for RefQueueWorker
RefQueueWorkerA worker thread for processing queued references. 
Region 
Region.Op 
RegionIterator 
RejectedExecutionExceptionException thrown by an Executor when a task cannot be accepted for execution. 
RejectedExecutionHandlerA handler for tasks that cannot be executed by a ThreadPoolExecutor
RelativeLayoutA Layout where the positions of the children can be described in relation to each other or to the parent. 
RelativeLayout.LayoutParamsPer-child layout information associated with RelativeLayout. 
RelativeSizeSpan 
RemoteCallbackList<E extends IInterface>Takes care of the grunt work of maintaining a list of remote interfaces, typically for the use of performing callbacks from a Service to its clients. 
RemoteExceptionParent exception for all Binder remote-invocation errors  
RemoteViewsA class that describes a view hierarchy that can be displayed in another process. 
RemoteViews.ActionExceptionException to send when something goes wrong executing an action  
RemoteViews.RemoteViewThis annotation indicates that a subclass of View is alllowed to be used with the RemoteViews mechanism. 
RenamingDelegatingContextThis is a class which delegates to the given context, but performs database and file operations with a renamed database/file name (prefixes default names with a given prefix). 
ReplacementSpan 
ReplacementTransformationMethodThis transformation method causes the characters in the getOriginal() array to be replaced by the corresponding characters in the getReplacement() array. 
RequestAddCookiesRequest interceptor that matches cookies available in the current CookieStore to the request being executed and generates corresponding cookierequest headers. 
RequestConnControlA request interceptor that suggests connection keep-alive to the server. 
RequestContentA request interceptor that decides about the transport encoding. 
RequestDateA request interceptor that adds a Date header. 
RequestDefaultHeadersRequest interceptor that adds default request headers. 
RequestDirectorA client-side request director. 
RequestExpectContinueA request interceptor that enables the expect-continue handshake. 
RequestLineThe first line of an HttpRequest
RequestProxyAuthentication 
RequestTargetAuthentication 
RequestTargetHostA request interceptor that sets the Host header for HTTP/1.1 requests. 
RequestUserAgentA request interceptor that adds a User-Agent header. 
RequestWrapperA wrapper class for HttpRequests that can be used to change properties of the current request without modifying the original object. 
ResolveInfoInformation that is returned from resolving an intent against an IntentFilter. 
ResolveInfo.DisplayNameComparator 
ResourceBundleResourceBundle is an abstract class which is the superclass of classes which provide Locale-specific resources. 
ResourceBundle.Control 
ResourceCursorAdapterAn easy adapter that creates views defined in an XML file. 
ResourceCursorTreeAdapterA fairly simple ExpandableListAdapter that creates views defined in an XML file. 
ResourcesClass for accessing an application's resources. 
Resources.NotFoundExceptionThis exception is thrown by the resource APIs when a requested resource can not be found. 
Resources.ThemeThis class holds the current attribute values for a particular theme. 
ResponseCacheCaches URLConnection responses. 
ResponseConnControlA response interceptor that suggests connection keep-alive to the client. 
ResponseContentA response interceptor that sets up entity-related headers. 
ResponseDateA response interceptor that adds a Date header. 
ResponseHandler<T>Handler that encapsulates the process of generating a response object from a HttpResponse
ResponseProcessCookiesResponse interceptor that populates the current CookieStore with data contained in response cookies received in the given the HTTP response. 
ResponseServerA response interceptor that adds a Server header. 
RestoreObserverCallback class for receiving progress reports during a restore operation. 
Result

An object that implements this interface contains the information needed to build a transformation result tree. 

ResultReceiverGeneric interface for receiving a callback result from someone. 
ResultSetAn interface for an object which represents a database table entry, returned as the result of the query to the database. 
ResultSetMetaDataProvides information about the columns returned in a ResultSet
RetentionDefines a meta-annotation for determining the scope of retention for an annotation. 
RetentionPolicyDefines an enumeration for annotation retention policies. 
RFC2109DomainHandler 
RFC2109SpecRFC 2109 compliant cookie policy 
RFC2109SpecFactory 
RFC2109VersionHandler 
RFC2617SchemeAbstract authentication scheme class that lays foundation for all RFC 2617 compliant authetication schemes and provides capabilities common to all authentication schemes defined in RFC 2617. 
RFC2965CommentUrlAttributeHandler"CommantURL" cookie attribute handler for RFC 2965 cookie spec. 
RFC2965DiscardAttributeHandler"Discard" cookie attribute handler for RFC 2965 cookie spec. 
RFC2965DomainAttributeHandler"Domain" cookie attribute handler for RFC 2965 cookie spec. 
RFC2965PortAttributeHandler"Port" cookie attribute handler for RFC 2965 cookie spec. 
RFC2965Spec

RFC 2965 specific cookie management functions. 

RFC2965SpecFactory 
RFC2965VersionAttributeHandler"Version" cookie attribute handler for RFC 2965 cookie spec. 
Rfc822TokenThis class stores an RFC 822-like name, address, and comment, and provides methods to convert them to quoted strings. 
Rfc822TokenizerThis class works as a Tokenizer for MultiAutoCompleteTextView for address list fields, and also provides a method for converting a string of addresses (such as might be typed into such a field) into a series of Rfc822Tokens. 
RingtoneRingtone provides a quick method for playing a ringtone, notification, or other similar types of sounds. 
RingtoneManagerRingtoneManager provides access to ringtones, notification, and other types of sounds. 
RingtonePreferenceA Preference that allows the user to choose a ringtone from those on the device. 
RootElementThe root XML element. 
RotateAnimationAn animation that controls the rotation of an object. 
RotateDrawable

A Drawable that can rotate another Drawable based on the current level value. 

RoundingModeSpecifies the rounding behavior for operations whose results cannot be represented exactly. 
RoundRectShapeCreates a rounded-corner rectangle. 
RoutedRequestA request with the route along which it should be sent. 
RouteInfoRead-only interface for route information. 
RouteInfo.LayerTypeThe layering type of a route. 
RouteInfo.TunnelTypeThe tunnelling type of a route. 
RouteSpecificPoolA connection sub-pool for a specific route, used by ConnPoolByRoute
RouteTrackerHelps tracking the steps in establishing a route. 
RowIdMaps SQL's ROWID type into Java. 
RowIdLifetimeAn enumeration to describe the life-time of RowID. 
RowSetAn interface which provides means to access data which persists on a database. 
RowSetEventAn event which is sent when specific events happen to a RowSet object. 
RowSetInternalAn interface provided by a RowSet object to let either a RowSetReader or a RowSetWriter access its internal state, thereby providing facilities to read and update the state of the RowSet
RowSetListenerAn interface used to send notification of events occurring in the context of a RowSet
RowSetMetaDataAn interface which provides facilities for getting information about the columns in a RowSet
RowSetReaderAn interface which provides functionality for a disconnected RowSet to get data from a database into its rows. 
RowSetWriterAn interface which provides functionality for a disconnected RowSet to put data updates back to the data source from which the RowSet was originally populated. 
RSAKeyThe base interface for PKCS#1 RSA public and private keys. 
RSAKeyGenParameterSpecThe parameter specification for generating an RSA key pair. 
RSAMultiPrimePrivateCrtKeyThe interface for a Multi-Prime RSA private key. 
RSAMultiPrimePrivateCrtKeySpecThe key specification of a RSA multi-prime private key with the Chinese Remainder Theorem (CRT) information values used. 
RSAOtherPrimeInfoThe additional prime information specified as triplet of primes, a prime exponent, and a Chinese Remainder Theorem (CRT) coefficient. 
RSAPrivateCrtKeyThe interface for a PKCS#1 RSA private key using CRT information values. 
RSAPrivateCrtKeySpecThe key specification of a RSA private key using Chinese Remainder Theorem (CRT) values. 
RSAPrivateKeyThe interface for an PKCS#1 RSA private key. 
RSAPrivateKeySpecThe key specification of a RSA private key. 
RSAPublicKeyThe interface for a PKCS#1 RSA public key. 
RSAPublicKeySpecThe key specification of a RSA public key. 
RuleBasedCollatorA concrete implementation class for Collation
RunnableRepresents a command that can be executed. 
RunnableFuture<V>A Future that is Runnable
RunnableScheduledFuture<V>A ScheduledFuture that is Runnable
RuntimeAllows Java applications to interface with the environment in which they are running. 
RuntimeExceptionRuntimeException is the superclass of all classes that represent exceptional conditions which occur as a result of executing an application in the virtual machine. 
RuntimePermissionRepresents the permission to execute a runtime-related function. 

S

SavepointA savepoint is an instant during the current transaction that can be utilized by a rollback via the rollback() command. 
SAXExceptionEncapsulate a general SAX error or warning. 
SAXNotRecognizedExceptionException class for an unrecognized identifier. 
SAXNotSupportedExceptionException class for an unsupported operation. 
SAXParseExceptionEncapsulate an XML parse error or warning. 
SAXParserDefines the API that wraps an XMLReader implementation class. 
SAXParserFactoryDefines a factory API that enables applications to configure and obtain a SAX based parser to parse XML documents. 
SAXResult

Acts as an holder for a transformation Result. 

SAXSource

Acts as an holder for SAX-style Source. 

SAXTransformerFactoryThis class extends TransformerFactory to provide SAX-specific factory methods. 
ScaleAnimationAn animation that controls the scale of an object. 
ScaleDrawableA Drawable that changes the size of another Drawable based on its current level value. 
ScaleGestureDetectorDetects transformation gestures involving more than one pointer ("multitouch") using the supplied MotionEvents. 
ScaleGestureDetector.OnScaleGestureListenerThe listener for receiving notifications when gestures occur. 
ScaleGestureDetector.SimpleOnScaleGestureListenerA convenience class to extend when you only want to listen for a subset of scaling-related events. 
ScaleXSpan 
ScannerA parser that parses a text string of primitive types and strings with the help of regular expressions. 
ScanResultDescribes information about a detected access point. 
ScatteringByteChannelThe interface for channels that can read data into a set of buffers in a single operation. 
ScheduledExecutorServiceAn ExecutorService that can schedule commands to run after a given delay, or to execute periodically. 
ScheduledFuture<V>A delayed result-bearing action that can be cancelled. 
ScheduledThreadPoolExecutorA ThreadPoolExecutor that can additionally schedule commands to run after a given delay, or to execute periodically. 
SchemaImmutable in-memory representation of grammar. 
SchemaFactoryFactory that creates Schema objects. Entry-point to the validation API. 
SchemaFactoryLoader

This class was removed from JAXP 1.3 before it was finalized but was mistakenly included in Java 5. 

SchemeEncapsulates specifics of a protocol scheme such as "http" or "https". 
SchemeRegistryA set of supported protocol schemes
ScrollerThis class encapsulates scrolling. 
ScrollingMovementMethod 
ScrollViewLayout container for a view hierarchy that can be scrolled by the user, allowing it to be larger than the physical display. 
SealedObjectA SealedObject is a wrapper around a serializable object instance and encrypts it using a cryptographic cipher. 
SearchableInfoSearchability meta-data for an activity. 
SearchManagerThis class provides access to the system search services. 
SearchManager.OnCancelListenerSee setOnCancelListener(SearchManager.OnCancelListener) for configuring your activity to monitor search UI state. 
SearchManager.OnDismissListenerSee setOnDismissListener(SearchManager.OnDismissListener) for configuring your activity to monitor search UI state. 
SearchRecentSuggestionsThis is a utility class providing access to SearchRecentSuggestionsProvider
SearchRecentSuggestionsProviderThis superclass can be used to create a simple search suggestions provider for your application. 
SecretKeyA cryptographic secret (symmetric) key. 
SecretKeyFactoryThe public API for SecretKeyFactory implementations. 
SecretKeyFactorySpiThe Service Provider Interface (SPI) definition for the SecretKeyFactory class. 
SecretKeySpecA key specification for a SecretKey and also a secret key implementation that is provider-independent. 
SectionIndexerInterface that should be implemented on Adapters to enable fast scrolling in an AbsListView between sections of the list. 
SecureCacheResponseA secure cache response represents data which is originally retrieved over a secure connection. 
SecureClassLoaderSecureClassLoader represents a ClassLoader which associates the classes it loads with a code source and provide mechanisms to allow the relevant permissions to be retrieved. 
SecureRandomThis class generates cryptographically secure pseudo-random numbers. 
SecureRandomSpiSecureRandomSpi is the Service Provider Interface (SPI) definition for SecureRandom
SecuritySecurity is the central class in the Java Security API. 
SecurityExceptionThrown when a security manager check fails. 
SecurityManagerWarning: security managers do not provide a secure environment for executing untrusted code. 
SecurityPermissionSecurityPermission objects guard access to the mechanisms which implement security. 
SeekBarA SeekBar is an extension of ProgressBar that adds a draggable thumb. 
SeekBar.OnSeekBarChangeListenerA callback that notifies clients when the progress level has been changed. 
SelectableChannelA channel that can be used with a Selector
SelectionUtility class for manipulating cursors and selections in CharSequences. 
SelectionKeyA SelectionKey represents the relationship between a channel and a selector for which the channel is registered. 
SelectorA controller for the selection of SelectableChannel objects. 
SelectorProviderSelectorProvider is an abstract base class that declares methods for providing instances of DatagramChannel, Pipe, Selector , ServerSocketChannel, and SocketChannel
SemaphoreA counting semaphore. 
SensorClass representing a sensor. 
SensorEvent

This class represents a Sensor event and holds informations such as the sensor's type, the time-stamp, accuracy and of course the sensor's data

SensorEventListenerUsed for receiving notifications from the SensorManager when sensor values have changed. 
SensorListener This interface is deprecated. Use SensorEventListener instead.  
SensorManager

SensorManager lets you access the device's sensors

SequenceInputStreamConcatenates two or more existing InputStreams. 
SerializableAn empty marker interface for classes that want to support serialization and deserialization based on the ObjectOutputStream and ObjectInputStream classes. 
SerializableEntity 
SerializablePermissionIs used to enable access to potentially unsafe serialization operations. 
ServerSocketThis class represents a server-side socket that waits for incoming client connections. 
ServerSocketChannelA ServerSocketChannel is a partial abstraction of a selectable, stream-oriented listening socket. 
ServerSocketFactoryThis abstract class defines methods to create server sockets. 
ServiceA Service is an application component representing either an application's desire to perform a longer-running operation while not interacting with the user or to supply functionality for other applications to use. 
ServiceConfigurationErrorThrown when a service provider can't be loaded by ServiceLoader
ServiceConnectionInterface for monitoring the state of an application service. 
ServiceInfoInformation you can retrieve about a particular application service. 
ServiceLoader<S>A service-provider loader. 
ServiceStateContains phone state and service related information. 
ServiceTestCase<T extends Service>This test case provides a framework in which you can test Service classes in a controlled environment. 
SessionInputBufferSession input buffer for blocking connections. 
SessionOutputBufferSession output buffer for blocking connections. 
Set<E>A Set is a data structure which does not allow duplicate elements. 
SetCookieThis interface represents a SetCookie response header sent by the origin server to the HTTP agent in order to maintain a conversational state. 
SetCookie2This interface represents a SetCookie2 response header sent by the origin server to the HTTP agent in order to maintain a conversational state. 
SettingsThe Settings provider contains global system-level device preferences. 
Settings.NameValueTableCommon base for tables of name/value settings. 
Settings.SecureSecure system settings, containing system preferences that applications can read but are not allowed to write. 
Settings.SettingNotFoundException 
Settings.SystemSystem settings, containing miscellaneous system preferences. 
ShaderShader is the based class for objects that return horizontal spans of colors during drawing. 
Shader.TileMode 
ShapeDefines a generic graphical "shape." Any Shape can be drawn to a Canvas with its own draw() method, but more graphical control is available if you instead pass it to a ShapeDrawable
ShapeDrawableA Drawable object that draws primitive shapes. 
ShapeDrawable.ShaderFactoryBase class defines a factory object that is called each time the drawable is resized (has a new width or height). 
SharedPreferencesInterface for accessing and modifying preference data returned by getSharedPreferences(String, int)
SharedPreferences.EditorInterface used for modifying values in a SharedPreferences object. 
SharedPreferences.OnSharedPreferenceChangeListenerInterface definition for a callback to be invoked when a shared preference is changed. 
SharedPreferencesBackupHelperA helper class that can be used in conjunction with BackupAgentHelper to manage the backup of SharedPreferences
ShortThe wrapper for the primitive type short
ShortBufferA buffer of shorts. 
ShortBufferExceptionThe exception that is thrown when the result of an operation is attempted to store in a user provided buffer that is too small. 
SignalStrengthContains phone signal strength related information. 
SignatureOpaque, immutable representation of a signature associated with an application package. 
SignatureSignature is an engine class which is capable of creating and verifying digital signatures, using different algorithms that have been registered with the Security class. 
SignatureExceptionSignatureException is a general Signature exception. 
SignatureSpiSignatureSpi is the Service Provider Interface (SPI) definition for Signature
SignedObjectA SignedObject instance acts as a container for another object. 
Signer This class is deprecated. Replaced by behavior in java.security.cert package and Principal  
SimpleAdapterAn easy adapter to map static data to views defined in an XML file. 
SimpleAdapter.ViewBinderThis class can be used by external clients of SimpleAdapter to bind values to views. 
SimpleCursorAdapterAn easy adapter to map columns from a cursor to TextViews or ImageViews defined in an XML file. 
SimpleCursorAdapter.CursorToStringConverterThis class can be used by external clients of SimpleCursorAdapter to define how the Cursor should be converted to a String. 
SimpleCursorAdapter.ViewBinderThis class can be used by external clients of SimpleCursorAdapter to bind values fom the Cursor to views. 
SimpleCursorTreeAdapterAn easy adapter to map columns from a cursor to TextViews or ImageViews defined in an XML file. 
SimpleCursorTreeAdapter.ViewBinderThis class can be used by external clients of SimpleCursorTreeAdapter to bind values from the Cursor to views. 
SimpleDateFormatA concrete class for formatting and parsing dates in a locale-sensitive manner. 
SimpleExpandableListAdapterAn easy adapter to map static data to group and child views defined in an XML file. 
SimpleFormatterSimpleFormatter can be used to print a summary of the information contained in a LogRecord object in a human readable format. 
SimpleTimeZoneSimpleTimeZone is a concrete subclass of TimeZone that represents a time zone for use with a Gregorian calendar. 
SingleClientConnManagerA connection "manager" for a single connection. 
SingleClientConnManager.ConnAdapterThe connection adapter used by this manager. 
SingleClientConnManager.PoolEntryThe pool entry for this connection manager. 
SingleLaunchActivityTestCase<T extends Activity>If you would like to test a single activity with an InstrumentationTestCase, this provides some of the boiler plate to launch and finish the activity in setUp() and tearDown()
SingleLineTransformationMethodThis transformation method causes any newline characters (\n) to be displayed as spaces instead of causing line breaks, and causes carriage return characters (\r) to have no appearance. 
SipAudioCallHandles an Internet audio call over SIP. 
SipAudioCall.ListenerListener for events relating to a SIP call, such as when a call is being recieved ("on ringing") or a call is outgoing ("on calling"). 
SipErrorCodeDefines error codes returned during SIP actions. 
SipExceptionIndicates a general SIP-related exception. 
SipManagerProvides APIs for SIP tasks, such as initiating SIP connections, and provides access to related SIP services. 
SipProfileDefines a SIP profile, including a SIP account, domain and server information. 
SipProfile.BuilderHelper class for creating a SipProfile
SipRegistrationListenerListener for SIP registration events. 
SipSessionRepresents a SIP session that is associated with a SIP dialog or a standalone transaction not within a dialog. 
SipSession.ListenerListener for events relating to a SIP session, such as when a session is being registered ("on registering") or a call is outgoing ("on calling"). 
SipSession.StateDefines SIP session states, such as "registering", "outgoing call", and "in call". 
SlidingDrawerSlidingDrawer hides content out of the screen and allows the user to drag a handle to bring the content on screen. 
SlidingDrawer.OnDrawerCloseListenerCallback invoked when the drawer is closed. 
SlidingDrawer.OnDrawerOpenListenerCallback invoked when the drawer is opened. 
SlidingDrawer.OnDrawerScrollListenerCallback invoked when the drawer is scrolled. 
SMConstants and static helpers related to the HTTP state management. 
SmallTestMarks a test that should run as part of the small tests. 
SmokeMarks a test that should run as part of the smoke tests. 
SmsManagerManages SMS operations such as sending data, text, and pdu SMS messages. 
SmsManager This class is deprecated. Replaced by android.telephony.SmsManager that supports both GSM and CDMA.  
SmsMessageA Short Message Service message. 
SmsMessage This class is deprecated. Replaced by android.telephony.SmsMessage that supports both GSM and CDMA.  
SmsMessage.MessageClassSMS Class enumeration. 
SmsMessage.MessageClass This enum is deprecated. Use android.telephony.SmsMessage.  
SmsMessage.SubmitPdu 
SmsMessage.SubmitPdu This class is deprecated. Use android.telephony.SmsMessage.  
SocketProvides a client-side TCP socket. 
SocketAddressThis abstract class represents a protocol-independent base for socket-endpoint representing classes. 
SocketChannelA SocketChannel is a selectable channel that provides a partial abstraction of stream connecting socket. 
SocketExceptionThis SocketException may be thrown during socket creation or setting options, and is the superclass of all other socket related exceptions. 
SocketFactoryThis abstract class defines methods to create sockets. 
SocketFactoryA factory for creating and connecting sockets. 
SocketHandlerA handler that writes log messages to a socket connection. 
SocketHttpClientConnectionImplementation of a client-side HTTP connection that can be bound to a network Socket in order to receive and transmit data. 
SocketHttpServerConnectionImplementation of a server-side HTTP connection that can be bound to a network Socket in order to receive and transmit data. 
SocketImplThis class is the base of all streaming socket implementation classes. 
SocketImplFactoryThis interface defines a factory for socket implementations. 
SocketInputBufferSocket bound session input buffer. 
SocketOptionsDefines an interface for socket implementations to get and set socket options. 
SocketOutputBufferSocket bound session output buffer. 
SocketPermissionRegulates the access to network operations available through sockets through permissions. 
SocketTimeoutExceptionThis exception is thrown when a timeout expired on a socket read or accept operation. 
SoftReference<T>Implements a soft reference, which is the least-weak of the three types of references. 
SortedMap<K, V>A map that has its keys ordered. 
SortedSet<E>SortedSet is a Set which iterates over its elements in a sorted order. 
SoundEffectConstantsConstants to be used to play sound effects via playSoundEffect(int)  
SoundPoolThe SoundPool class manages and plays audio resources for applications. 
SoundPool.OnLoadCompleteListenerInterface definition for a callback to be invoked when all the sounds are loaded. 
SourceAn object that implements this interface contains the information needed to act as source input (XML source or transformation instructions). 
SourceLocatorThis interface is primarily for the purposes of reporting where an error occurred in the XML source or transformation instructions. 
SpannableThis is the interface for text to which markup objects can be attached and detached. 
Spannable.FactoryFactory used by TextView to create new Spannables. 
SpannableStringThis is the class for text whose content is immutable but to which markup objects can be attached and detached. 
SpannableStringBuilderThis is the class for text whose content and markup can both be changed. 
SpannedThis is the interface for text that has markup objects attached to ranges of it. 
SpannedStringThis is the class for text whose content and markup are immutable. 
SpanWatcherWhen an object of this type is attached to a Spannable, its methods will be called to notify it that other markup objects have been added, changed, or removed. 
SparseArray<E>SparseArrays map integers to Objects. 
SparseBooleanArraySparseBooleanArrays map integers to booleans. 
SparseIntArraySparseIntArrays map integers to integers. 
SpeechRecognizerThis class provides access to the speech recognition service. 
SpinnerA view that displays one child at a time and lets the user pick among them. 
SpinnerAdapterExtended Adapter that is the bridge between a Spinner and its data. 
SQLClientInfoExceptionAn exception, which is subclass of SQLException, is thrown when one or more client info properties could not be set on a Connection. 
SQLDataAn interface for the custom mapping of an SQL User Defined Type (UDT) to a Java class. 
SQLDataExceptionAn exception, which is subclass of SQLException, is thrown when various data errors arise. 
SQLExceptionAn exception that indicates there was an error with SQL parsing or execution. 
SQLExceptionAn exception that indicates a failed JDBC operation. 
SQLFeatureNotSupportedExceptionAn exception, which is subclass of SQLNonTransientException, is thrown when various the JDBC driver does not support an optional JDBC feature. 
SQLInputThe SQLInput interface defines operations which apply to a type of input stream which carries a series of values representing an instance of an SQL structured type or SQL distinct type. 
SQLIntegrityConstraintViolationExceptionAn exception, which is subclass of SQLNonTransientException, is thrown when various the an integrity constraint (foreign key, primary key or unique key) has been violated. 
SQLInvalidAuthorizationSpecExceptionAn exception, which is subclass of SQLNonTransientException, is thrown when the authorization credentials presented during connection establishment are not valid. 
SQLiteAbortExceptionAn exception that indicates that the SQLite program was aborted. 
SQLiteClosableAn object created from a SQLiteDatabase that can be closed. 
SQLiteConstraintExceptionAn exception that indicates that an integrity constraint was violated. 
SQLiteCursorA Cursor implementation that exposes results from a query on a SQLiteDatabase
SQLiteCursorDriverA driver for SQLiteCursors that is used to create them and gets notified by the cursors it creates on significant events in their lifetimes. 
SQLiteDatabaseExposes methods to manage a SQLite database. 
SQLiteDatabase.CursorFactoryUsed to allow returning sub-classes of Cursor when calling query. 
SQLiteDatabaseCorruptExceptionAn exception that indicates that the SQLite database file is corrupt. 
SQLiteDiskIOExceptionAn exception that indicates that an IO error occured while accessing the SQLite database file. 
SQLiteDoneExceptionAn exception that indicates that the SQLite program is done. 
SQLiteExceptionA SQLite exception that indicates there was an error with SQL parsing or execution. 
SQLiteFullExceptionAn exception that indicates that the SQLite database is full. 
SQLiteMisuseException 
SQLiteOpenHelperA helper class to manage database creation and version management. 
SQLiteProgramA base class for compiled SQLite programs. 
SQLiteQueryA SQLite program that represents a query that reads the resulting rows into a CursorWindow. 
SQLiteQueryBuilderThis is a convience class that helps build SQL queries to be sent to SQLiteDatabase objects. 
SQLiteStatementA pre-compiled statement against a SQLiteDatabase that can be reused. 
SQLiteTransactionListenerA listener for transaction events. 
SQLNonTransientConnectionExceptionAn exception, which is subclass of SQLException, is thrown when the connection operation that failed will not succeed when the operation is retried without the cause of the failure being corrected. 
SQLNonTransientException 
SQLOutputThe interface for an output stream used to write attributes of an SQL User Defined Type (UDT) to the database. 
SQLPermissionA Permission relating to security access control in the java.sql package. 
SQLRecoverableException 
SQLSyntaxErrorException 
SQLTimeoutException 
SQLTransactionRollbackException 
SQLTransientConnectionException 
SQLTransientException 
SQLWarningAn exception class that holds information about Database access warnings. 
SQLXMLMaps SQL's XML type into Java. 
SslCertificateSSL certificate info (certificate details) class  
SslCertificate.DNameA distinguished name helper class: a 3-tuple of: - common name (CN), - organization (O), - organizational unit (OU)  
SSLCertificateSocketFactorySSLSocketFactory implementation with several extra features:
  • Timeout specification for SSL handshake operations
  • Hostname verification in most cases (see WARNINGs below)
  • Optional SSL session caching with SSLSessionCache
  • Optionally bypass all SSL certificate checks
The handshake timeout does not apply to actual TCP socket connection. 
SSLContextThe public API for secure socket protocol implementations. 
SSLContextSpiThe Service Provider Interface (SPI) for the SSLContext class. 
SSLEngineThe abstract implementation of secure communications using SSL, TLS, or other protocols. 
SSLEngineResultThe result object describing the state of the SSLEngine produced by the wrap() and unwrap() operations. 
SSLEngineResult.HandshakeStatusThe enum describing the state of the current handshake. 
SSLEngineResult.StatusThe enum describing the result of the SSLEngine operation. 
SslErrorOne or more individual SSL errors and the associated SSL certificate  
SslErrorHandlerSslErrorHandler: class responsible for handling SSL errors. 
SSLExceptionThe base class for all SSL related exceptions. 
SSLHandshakeExceptionThe exception that is thrown when a handshake could not be completed successfully. 
SSLKeyExceptionThe exception that is thrown when an invalid SSL key is encountered. 
SSLParametersSSL handshake parameters that include protocols, cipher suites, and client authentication requirements. 
SSLPeerUnverifiedExceptionThe exception that is thrown when the identity of a peer has not beed verified. 
SSLPermissionThe class representing a network permission. 
SSLProtocolExceptionThe exception that is thrown when an error in the operation of the SSL protocol is encountered. 
SSLServerSocketThe extension of ServerSocket which provides secure server sockets based on protocols like SSL, TLS, or others. 
SSLServerSocketFactoryThe factory for SSL server sockets. 
SSLSessionThe interface representing an SSL session. 
SSLSessionBindingEventThe event sent to an SSLSessionBindingListener when the listener object is bound (putValue(String, Object)) or unbound (removeValue(String)) to an SSLSession
SSLSessionBindingListenerThe interface to be implemented by any object that requires notification when data objects are bound to (or unbound from) an SSLSession
SSLSessionCacheFile-based cache of established SSL sessions. 
SSLSessionContextA collection of SSLSessions. 
SSLSocketThe extension of Socket providing secure protocols like SSL (Secure Socket Layer") or TLS (Transport Layer Security). 
SSLSocketFactoryThe abstract factory implementation to create SSLSockets. 
SSLSocketFactoryLayered socket factory for TLS/SSL connections, based on JSSE. 
Stack<E>Stack is a Last-In/First-Out(LIFO) data structure which represents a stack of objects. 
StackOverflowErrorThrown when the depth of the callstack of the running program excedes some platform or virtual machine specific limit. 
StackTraceElementA representation of a single stack frame. 
StaleDataExceptionThis exception is thrown when a Cursor contains stale data and must be requeried before being used again. 
StartElementListenerListens for the beginning of elements. 
StateListDrawableLets you assign a number of graphic images to a single Drawable and swap out the visible item by a string ID value. 
StatementInterface used for executing static SQL statements to retrieve query results. 
StatementEventA statement event that a PreparedStatement is closed 
StatementEventListenerAn object that registers to be notified of events that occur on PreparedStatements that are in the Statement pool. 
StateSetState sets are arrays of positive ints where each element represents the state of a View (e.g. 
StatFsRetrieve overall information about the space on a filesystem. 
StaticLayoutStaticLayout is a Layout for text that will not be edited after it is laid out. 
StatusLineRepresents a status line as returned from a HTTP server. 
StorageManagerStorageManager is the interface to the systems storage service. 
StreamCorruptedExceptionSignals that the readObject() method could not read an object due to missing information (for example, a cyclic reference that doesn't match a previous instance, or a missing class descriptor for the object to be loaded). 
StreamHandlerA StreamHandler object writes log messages to an output stream, that is, objects of the class OutputStream
StreamResult

Acts as an holder for a transformation result, which may be XML, plain Text, HTML, or some other form of markup. 

StreamSource

Acts as an holder for a transformation Source in the form of a stream of XML markup. 

StreamTokenizerParses a stream into a set of defined tokens, one at a time. 
StrictContentLengthStrategyThe strict implementation of the content length strategy. 
StrictHostnameVerifierThe Strict HostnameVerifier works the same way as Sun Java 1.4, Sun Java 5, Sun Java 6-rc. 
StrictMathClass StrictMath provides basic math constants and operations such as trigonometric functions, hyperbolic functions, exponential, logarithms, etc. 
StrictMode

StrictMode is a developer tool which detects things you might be doing by accident and brings them to your attention so you can fix them. 

StrictMode.ThreadPolicyStrictMode policy applied to a certain thread. 
StrictMode.ThreadPolicy.BuilderCreates ThreadPolicy instances. 
StrictMode.VmPolicyStrictMode policy applied to all threads in the virtual machine's process. 
StrictMode.VmPolicy.BuilderCreates StrictMode.VmPolicy instances. 
StrikethroughSpan 
StringAn immutable sequence of characters/code units (chars). 
StringBufferA modifiable sequence of characters for use in creating strings, where all accesses are synchronized. 
StringBufferInputStream This class is deprecated. Use StringReader  
StringBuilderA modifiable sequence of characters for use in creating strings. 
StringBuilderPrinterImplementation of a Printer that sends its output to a StringBuilder
StringCharacterIteratorAn implementation of CharacterIterator for strings. 
StringEntityAn entity whose content is retrieved from a string. 
StringIndexOutOfBoundsExceptionThrown when the a string is indexed with a value less than zero, or greater than or equal to the size of the array. 
StringReaderA specialized Reader that reads characters from a String in a sequential manner. 
StringTokenizerThe StringTokenizer class allows an application to break a string into tokens by performing code point comparison. 
StringWriterA specialized Writer that writes characters to a StringBuffer in a sequential manner, appending them in the process. 
StructAn interface which provides facilities for manipulating an SQL structured type as a Java object. 
StyleSpanDescribes a style in a span. 
SubjectThe central class of the javax.security.auth package representing an authenticated user or entity (both referred to as "subject"). 
SubjectDomainCombinerMerges permissions based on code source and code signers with permissions granted to the specified Subject
SubMenuSubclass of Menu for sub menus. 
SubscriptSpan 
SumPathEffect 
SuperscriptSpan 
SupplicantStateFrom defs.h in wpa_supplicant
SuppressUse this annotation on test classes or test methods that should not be included in a test suite. 
SuppressWarningsAnnotation type used to indicate that the compiler should not issue the specified warnings for the marked program element. 
SurfaceHandle on to a raw buffer that is being managed by the screen compositor. 
Surface.OutOfResourcesExceptionException thrown when a surface couldn't be created or resized  
SurfaceHolderAbstract interface to someone holding a display surface. 
SurfaceHolder.BadSurfaceTypeExceptionException that is thrown from lockCanvas() when called on a Surface whose is SURFACE_TYPE_PUSH_BUFFERS. 
SurfaceHolder.CallbackA client may implement this interface to receive information about changes to the surface. 
SurfaceHolder.Callback2Additional callbacks that can be received for SurfaceHolder.Callback
SurfaceViewProvides a dedicated drawing surface embedded inside of a view hierarchy. 
SweepGradient 
SyncAdapterTypeValue type that represents a SyncAdapterType. 
SyncBaseInstrumentationIf you would like to test sync a single provider with an InstrumentationTestCase, this provides some of the boiler plate in setUp() and tearDown()
SyncBasicHttpContextThread-safe extension of the BasicHttpContext
SyncContext 
SyncFailedExceptionSignals that the sync() method has failed to complete. 
SynchronousQueue<E>A blocking queue in which each insert operation must wait for a corresponding remove operation by another thread, and vice versa. 
SyncInfoInformation about the sync operation that is currently underway. 
SyncResultThis class is used to communicate the results of a sync operation to the SyncManager. 
SyncStateContractThe ContentProvider contract for associating data with ana data array account. 
SyncStateContract.Columns 
SyncStateContract.Constants 
SyncStateContract.Helpers 
SyncStatsUsed to record various statistics about the result of a sync operation. 
SyncStatusObserver 
SystemProvides access to system-related information and resources including standard input and output. 
SystemClockCore timekeeping facilities. 

T

TabActivityAn activity that contains and runs multiple embedded activities or views. 
TabHostContainer for a tabbed window view. 
TabHost.OnTabChangeListenerInterface definition for a callback to be invoked when tab changed  
TabHost.TabContentFactoryMakes the content of a tab when it is selected. 
TabHost.TabSpecA tab has a tab indicator, content, and a tag that is used to keep track of it. 
TableLayout

A layout that arranges its children into rows and columns. 

TableLayout.LayoutParams

This set of layout parameters enforces the width of each child to be MATCH_PARENT and the height of each child to be WRAP_CONTENT, but only if the height is not specified. 

TableRow

A layout that arranges its children horizontally. 

TableRow.LayoutParams

Set of layout parameters used in table rows. 

TabStopSpanRepresents a single tab stop on a line. 
TabStopSpan.StandardThe default implementation of TabStopSpan. 
TabWidgetDisplays a list of tab labels representing each page in the parent's tab collection. 
TargetDefines a meta-annotation for determining what ElementTypes an annotation can be applied to. 
TelephonyManagerProvides access to information about the telephony services on the device. 
TemplatesAn object that implements this interface is the runtime representation of processed transformation instructions. 
TemplatesHandlerA SAX ContentHandler that may be used to process SAX parse events (parsing transformation instructions) into a Templates object. 
TestA Test can be run and collect its results. 
TestCaseA test case defines the fixture to run multiple tests. 
TestFailureA TestFailure collects a failed test together with the caught exception. 
TestListenerA Listener for test progress  
TestMethodRepresents a test to be run. 
TestResultA TestResult collects the results of executing a test case. 
TestSuiteA TestSuite is a Composite of Tests. 
TestSuiteBuilderBuild suites based on a combination of included packages, excluded packages, and predicates that must be satisfied. 
TestSuiteBuilder.FailedToCreateTestsA special TestCase used to indicate a failure during the build() step. 
TestSuiteLoaderAn interface to define how a test suite should be loaded. 
TestSuiteProviderImplementors will know how to get a test suite. 
TestTargetDefines an annotation used be used within the TestInfo annotation. 
TestTargetClassDefines an annotation for test classes that allows to link them to the class that is being tested. 
TextThe Text interface inherits from CharacterData and represents the textual content (termed character data in XML) of an Element or Attr
TextAppearanceSpanSets the text color, size, style, and typeface to match a TextAppearance resource. 
TextAttributeThe TextAttribute class defines attribute keys and attribute values for text rendering. 
TextElementListenerListens for the beginning and ending of text elements. 
TextKeyListenerThis is the key listener for typing normal text. 
TextKeyListener.Capitalize 
TextPaintTextPaint is an extension of Paint that leaves room for some extra data used during text measuring and drawing. 
TextSwitcherSpecialized ViewSwitcher that contains only children of type TextView
TextToSpeechSynthesizes speech from text for immediate playback or to create a sound file. 
TextToSpeech.EngineInternal constants for the TextToSpeech functionality  
TextToSpeech.OnInitListenerInterface definition of a callback to be invoked indicating the completion of the TextToSpeech engine initialization. 
TextToSpeech.OnUtteranceCompletedListenerInterface definition of a callback to be invoked indicating the TextToSpeech engine has completed synthesizing an utterance with an utterance ID set. 
TextUtils 
TextUtils.EllipsizeCallback 
TextUtils.SimpleStringSplitterA simple string splitter. 
TextUtils.StringSplitterAn interface for splitting strings according to rules that are opaque to the user of this interface. 
TextUtils.TruncateAt 
TextViewDisplays text to the user and optionally allows them to edit it. 
TextView.BufferType 
TextView.OnEditorActionListenerInterface definition for a callback to be invoked when an action is performed on the editor. 
TextView.SavedStateUser interface state that is stored by TextView for implementing onSaveInstanceState()
TextWatcherWhen an object of a type is attached to an Editable, its methods will be called when the text is changed. 
ThreadA Thread is a concurrent unit of execution. 
Thread.StateA representation of a thread's state. 
Thread.UncaughtExceptionHandlerImplemented by objects that want to handle cases where a thread is being terminated by an uncaught exception. 
ThreadDeathThreadDeath is thrown when a thread stops executing. 
ThreadFactoryAn object that creates new threads on demand. 
ThreadGroupThreadGroup is a means of organizing threads into a hierarchical structure. 
ThreadLocal<T>Implements a thread-local storage, that is, a variable for which each thread has its own value. 
ThreadPoolExecutorAn ExecutorService that executes each submitted task using one of possibly several pooled threads, normally configured using Executors factory methods. 
ThreadPoolExecutor.AbortPolicyA handler for rejected tasks that throws a RejectedExecutionException
ThreadPoolExecutor.CallerRunsPolicyA handler for rejected tasks that runs the rejected task directly in the calling thread of the execute method, unless the executor has been shut down, in which case the task is discarded. 
ThreadPoolExecutor.DiscardOldestPolicyA handler for rejected tasks that discards the oldest unhandled request and then retries execute, unless the executor is shut down, in which case the task is discarded. 
ThreadPoolExecutor.DiscardPolicyA handler for rejected tasks that silently discards the rejected task. 
ThreadSafeClientConnManagerManages a pool of client connections
ThrowableThe superclass of all classes which can be thrown by the virtual machine. 
ThumbnailUtilsThumbnail generation routines for media provider. 
TimeThe Time class is a faster replacement for the java.util.Calendar and java.util.GregorianCalendar classes. 
TimeJava representation of an SQL TIME value. 
TimeFormatException 
TimeKeyListenerFor entering times in a text field. 
TimeoutExceptionException thrown when a blocking operation times out. 
TimePickerA view for selecting the time of day, in either 24 hour or AM/PM mode. 
TimePicker.OnTimeChangedListenerThe callback interface used to indicate the time has been adjusted. 
TimePickerDialogA dialog that prompts the user for the time of day using a TimePicker
TimePickerDialog.OnTimeSetListenerThe callback interface used to indicate the user is done filling in the time (they clicked on the 'Set' button). 
TimerTimers schedule one-shot or recurring tasks for execution. 
TimerTaskThe TimerTask class represents a task to run at a specified time. 
TimestampTimestamp represents a signed time stamp. 
TimestampA Java representation of the SQL TIMESTAMP type. 
TimeUnitA TimeUnit represents time durations at a given unit of granularity and provides utility methods to convert across units, and to perform timing and delay operations in these units. 
TimeUtilsA class containing utility methods related to time zones. 
TimeZoneTimeZone represents a time zone, primarily used for configuring a Calendar or SimpleDateFormat instance. 
TimingLoggerA utility class to help log timings splits throughout a method call. 
ToastA toast is a view containing a quick little message for the user. The toast class helps you create and show those.  
ToggleButtonDisplays checked/unchecked states as a button with a "light" indicator and by default accompanied with the text "ON" or "OFF". 
TokenIteratorAn iterator for String tokens. 
TokenWatcherHelper class that helps you use IBinder objects as reference counted tokens. 
ToneGeneratorThis class provides methods to play DTMF tones (ITU-T Recommendation Q.23), call supervisory tones (3GPP TS 22.001, CEPT) and proprietary tones (3GPP TS 31.111). 
TooManyListenersExceptionA TooManyListenersException is thrown when an attempt is made to add more than one listener to an event source which only supports a single listener. 
Touch 
TouchDelegateHelper class to handle situations where you want a view to have a larger touch area than its actual view bounds. 
TouchUtilsReusable methods for generating touch events. 
TrafficStatsClass that provides network traffic statistics. 
TransformationDefines the transformation to be applied at one point in time of an Animation. 
TransformationMethodTextView uses TransformationMethods to do things like replacing the characters of passwords with dots, or keeping the newline characters from causing line breaks in single-line text fields. 
TransformerAn instance of this abstract class can transform a source tree into a result tree. 
TransformerConfigurationExceptionIndicates a serious configuration error. 
TransformerExceptionThis class specifies an exceptional condition that occurred during the transformation process. 
TransformerFactory

A TransformerFactory instance can be used to create Transformer and Templates objects. 

TransformerFactoryConfigurationErrorThrown when a problem with configuration with the Transformer Factories exists. 
TransformerHandlerA TransformerHandler listens for SAX ContentHandler parse events and transforms them to a Result. 
TransitionDrawableAn extension of LayerDrawables that is intended to cross-fade between the first and second layer. 
TranslateAnimationAn animation that controls the position of an object. 
TreeMap<K, V>A map whose entries are sorted by their keys. 
TreeSet<E>TreeSet is an implementation of SortedSet. 
TrustAnchorThis class represents a trust anchor for validation of X.509 certification path. 
TrustManagerThe marker interface for JSSE trust managers. 
TrustManagerFactoryThe factory for TrustManagers based on KeyStore or provider specific implementation. 
TrustManagerFactorySpiThe Service Provider Interface (SPI) for the TrustManagerFactory class. 
TunnelRefusedException 
TwoLineListItem

A view group with two children, intended for use in ListViews. 

TypeCommon interface implemented by all Java types. 
TypedArrayContainer for an array of values that were retrieved with obtainStyledAttributes(AttributeSet, int[], int, int) or obtainAttributes(AttributeSet, int[])
TypedValueContainer for a dynamically typed data value. 
TypefaceThe Typeface class specifies the typeface and intrinsic style of a font. 
TypefaceSpanChanges the typeface family of the text to which the span is attached. 
TypeInfoThe TypeInfo interface represents a type referenced from Element or Attr nodes, specified in the schemas associated with the document. 
TypeInfoProviderThis class provides access to the type information determined by ValidatorHandler
TypeNotPresentExceptionThrown when a program tries to access a class, interface, enum or annotation type through a string that contains the type's name and the type cannot be found. 
TypesA class which defines constants used to identify generic SQL types, also called JDBC types. 
TypeVariable<D extends GenericDeclaration>This interface represents a type variables such as 'T' in 'public interface Comparable<T>', the bounded 'T' in 'public interface A<T extends Number>' or the multiple bounded 'T' in 'public interface B<T extends Number & Cloneable>'

U

UiModeManagerThis class provides access to the system uimode services. 
UiThreadTestThis annotation can be used on an InstrumentationTestCase's test methods. 
UndeclaredThrowableExceptionThis class provides a wrapper for an undeclared, checked exception thrown by an InvocationHandler. 
UnderlineSpan 
UnknownErrorThrown when the virtual machine must throw an error which does not match any known exceptional condition. 
UnknownFormatConversionExceptionAn UnknownFormatConversionException will be thrown if the format conversion is unknown. 
UnknownFormatFlagsExceptionAn UnknownFormatFlagsException will be thrown if there is an unknown flag. 
UnknownHostExceptionIs thrown when a hostname can not be resolved. 
UnknownServiceExceptionIs thrown if no appropriate ContentHandler could be found for a particular service requested by the URL connection. 
UnmappableCharacterExceptionAn UnmappableCharacterException is thrown when an unmappable character for the given charset is encountered. 
UnrecoverableEntryExceptionUnrecoverableEntryException indicates, that a KeyStore.Entry cannot be recovered from a KeyStore
UnrecoverableKeyExceptionUnrecoverableKeyException indicates, that a key cannot be recovered from a KeyStore
UnresolvedAddressExceptionAn UnresolvedAddressException is thrown when trying to use an unresolved network address in a network operation. 
UnresolvedPermissionAn UnresolvedPermission represents a Permission whose type should be resolved lazy and not during initialization time of the Policy
UnsatisfiedLinkErrorThrown when an attempt is made to invoke a native for which an implementation could not be found. 
UnsupportedAddressTypeExceptionAn UnsupportedAddressTypeException is thrown when connecting or binding to an unsupported address type. 
UnsupportedCallbackExceptionThrown when a CallbackHandler does not support a particular Callback
UnsupportedCharsetExceptionAn UnsupportedCharsetException is thrown when an unsupported charset name is encountered. 
UnsupportedClassVersionErrorThrown when an attempt is made to load a class with a format version that is not supported by the virtual machine. 
UnsupportedDigestAlgorithmExceptionAuthentication credentials required to respond to a authentication challenge are invalid 
UnsupportedEncodingExceptionThrown when a program asks for a particular character converter that is unavailable. 
UnsupportedHttpVersionExceptionIndicates an unsupported version of the HTTP protocol. 
UnsupportedOperationExceptionThrown when an unsupported operation is attempted. 
UpdateAppearanceThe classes that affect character-level text in a way that modifies their appearance when one is added or removed must implement this interface. 
UpdateLayoutThe classes that affect character-level text formatting in a way that triggers a text layout update when one is added or removed must implement this interface. 
UriImmutable URI reference. 
URIThis class represents an instance of a URI as defined by RFC 2396. 
Uri.BuilderHelper class for building or manipulating URI references. 
UriMatcherUtility class to aid in matching URIs in content providers. 
UriPatternMatcherMaintains a map of objects keyed by a request URI pattern. 
URIResolver

An object that implements this interface that can be called by the processor to turn a URI used in document(), xsl:import, or xsl:include into a Source object. 

URISyntaxExceptionA URISyntaxException will be thrown if some information could not be parsed while creating a URI. 
URIUtilsA collection of utilities for URIs, to workaround bugs within the class or for ease-of-use features. 
URLA URL instance specifies the location of a resource on the internet as specified by RFC 1738. 
URLClassLoaderThis class loader is responsible for loading classes and resources from a list of URLs which can refer to either directories or JAR files. 
URLConnectionA connection to a URL for reading or writing. 
URLDecoderThis class is used to decode a string which is encoded in the application/x-www-form-urlencoded MIME content type. 
UrlEncodedFormEntityAn entity composed of a list of url-encoded pairs. 
URLEncodedUtilsA collection of utilities for encoding URLs. 
URLEncoderThis class is used to encode a string using the format required by application/x-www-form-urlencoded MIME content type. 
UrlInterceptHandler This interface is deprecated. This interface was inteded to be used by Gears. Since Gears was deprecated, so is this class.  
UrlInterceptRegistry This class is deprecated. This class was intended to be used by Gears. Since Gears was deprecated, so is this class.  
UrlQuerySanitizerSanitizes the Query portion of a URL. 
UrlQuerySanitizer.IllegalCharacterValueSanitizerSanitize values based on which characters they contain. 
UrlQuerySanitizer.ParameterValuePairA simple tuple that holds parameter-value pairs. 
UrlQuerySanitizer.ValueSanitizerA functor used to sanitize a single query value. 
URLSpan 
URLStreamHandlerThe abstract class URLStreamHandler is the base for all classes which can handle the communication with a URL object over a particular protocol type. 
URLStreamHandlerFactoryDefines a factory which creates an URLStreamHandler for a specified protocol. 
URLUtil 
UserDataHandlerWhen associating an object to a key on a node using Node.setUserData() the application can provide a handler that gets called when the node the object is associated to is being cloned, imported, or renamed. 
UserDictionaryA provider of user defined words for input methods to use for predictive text input. 
UserDictionary.WordsContains the user defined words. 
UsernamePasswordCredentialsUsername and password Credentials 
UserTokenHandlerA handler for determining if the given execution context is user specific or not. 
UTFDataFormatExceptionSignals that an incorrectly encoded UTF-8 string has been encountered, most likely while reading some DataInputStream
UUIDUUID is an immutable representation of a 128-bit universally unique identifier (UUID). 

V

Validator

A processor that checks an XML document against Schema

ValidatorHandlerStreaming validator that works on SAX stream. 
ValueCallback<T>A callback interface used to returns values asynchronously  
Vector<E>Vector is an implementation of List, backed by an array and synchronized. 
VelocityTrackerHelper for tracking the velocity of touch events, for implementing flinging and other such gestures. 
VerifyErrorThrown when the virtual machine notices that an attempt is made to load a class which does not pass the class verification phase. 
VersionThis class defines the current version of JUnit  
VersionInfoProvides access to version information for HTTP components. 
VibratorClass that operates the vibrator on the device. 
VideoViewDisplays a video file. 
View

This class represents the basic building block for user interface components. 

View.BaseSavedStateBase class for derived classes that want to save and restore their own state in onSaveInstanceState()
View.MeasureSpecA MeasureSpec encapsulates the layout requirements passed from parent to child. 
View.OnClickListenerInterface definition for a callback to be invoked when a view is clicked. 
View.OnCreateContextMenuListenerInterface definition for a callback to be invoked when the context menu for this view is being built. 
View.OnFocusChangeListenerInterface definition for a callback to be invoked when the focus state of a view changed. 
View.OnKeyListenerInterface definition for a callback to be invoked when a key event is dispatched to this view. 
View.OnLongClickListenerInterface definition for a callback to be invoked when a view has been clicked and held. 
View.OnTouchListenerInterface definition for a callback to be invoked when a touch event is dispatched to this view. 
ViewAnimatorBase class for a FrameLayout container that will perform animations when switching between its views. 
ViewAssertsSome useful assertions about views. 
ViewConfigurationContains methods to standard constants used in the UI for timeouts, sizes, and distances. 
ViewDebugVarious debugging/tracing tools related to View and the view hierarchy. 
ViewDebug.CapturedViewPropertyThis annotation can be used to mark fields and methods to be dumped when the view is captured. 
ViewDebug.ExportedPropertyThis annotation can be used to mark fields and methods to be dumped by the view server. 
ViewDebug.FlagToStringDefines a mapping from an flag to a String. 
ViewDebug.HierarchyTraceTypeDefines the type of hierarhcy trace to output to the hierarchy traces file. 
ViewDebug.IntToStringDefines a mapping from an int value to a String. 
ViewDebug.RecyclerTraceTypeDefines the type of recycler trace to output to the recycler traces file. 
ViewFlipperSimple ViewAnimator that will animate between two or more views that have been added to it. 
ViewGroup

A ViewGroup is a special view that can contain other views (called children.) The view group is the base class for layouts and views containers. 

ViewGroup.LayoutParamsLayoutParams are used by views to tell their parents how they want to be laid out. 
ViewGroup.MarginLayoutParamsPer-child layout information for layouts that support margins. 
ViewGroup.OnHierarchyChangeListenerInterface definition for a callback to be invoked when the hierarchy within this view changed. 
ViewManagerInterface to let you add and remove child views to an Activity. 
ViewParentDefines the responsibilities for a class that will be a parent of a View. 
ViewStubA ViewStub is an invisible, zero-sized View that can be used to lazily inflate layout resources at runtime. 
ViewStub.OnInflateListenerListener used to receive a notification after a ViewStub has successfully inflated its layout resource. 
ViewSwitcherViewAnimator that switches between two views, and has a factory from which these views are created. 
ViewSwitcher.ViewFactoryCreates views in a ViewSwitcher. 
ViewTreeObserverA view tree observer is used to register listeners that can be notified of global changes in the view tree. 
ViewTreeObserver.OnGlobalFocusChangeListenerInterface definition for a callback to be invoked when the focus state within the view tree changes. 
ViewTreeObserver.OnGlobalLayoutListenerInterface definition for a callback to be invoked when the global layout state or the visibility of views within the view tree changes. 
ViewTreeObserver.OnPreDrawListenerInterface definition for a callback to be invoked when the view tree is about to be drawn. 
ViewTreeObserver.OnScrollChangedListenerInterface definition for a callback to be invoked when something in the view tree has been scrolled. 
ViewTreeObserver.OnTouchModeChangeListenerInterface definition for a callback to be invoked when the touch mode changes. 
VirtualizerAn audio virtualizer is a general name for an effect to spatialize audio channels. 
Virtualizer.OnParameterChangeListenerThe OnParameterChangeListener interface defines a method called by the Virtualizer when a parameter value has changed. 
Virtualizer.SettingsThe Settings class regroups all virtualizer parameters. 
VirtualMachineErrorVirtualMachineError is the superclass of all error classes that occur during the operation of the virtual machine. 
VisibilityA collection of utility methods for computing the visibility of triangle meshes. 
VisualizerThe Visualizer class enables application to retrieve part of the currently playing audio for visualization purpose. 
Visualizer.OnDataCaptureListenerThe OnDataCaptureListener interface defines methods called by the Visualizer to periodically update the audio visualization capture. 
VoidPlaceholder class for the Java keyword void

W

WaitingThreadRepresents a thread waiting for a connection. 
WaitingThreadAborterA simple class that can interrupt a WaitingThread
WallpaperInfoThis class is used to specify meta information of a wallpaper service. 
WallpaperManagerProvides access to the system wallpaper. 
WallpaperServiceA wallpaper service is responsible for showing a live wallpaper behind applications that would like to sit on top of it. 
WallpaperService.EngineThe actual implementation of a wallpaper. 
WeakHashMap<K, V>WeakHashMap is an implementation of Map with keys which are WeakReferences. 
WeakReference<T>Implements a weak reference, which is the middle of the three types of references. 
WebBackForwardListThis class contains the back/forward list for a WebView. 
WebChromeClient 
WebChromeClient.CustomViewCallbackA callback interface used by the host application to notify the current page that its custom view has been dismissed. 
WebHistoryItemA convenience class for accessing fields in an entry in the back/forward list of a WebView. 
WebIconDatabaseFunctions for manipulating the icon database used by WebView. 
WebIconDatabase.IconListenerInterface for receiving icons from the database. 
WebSettingsManages settings state for a WebView. 
WebSettings.LayoutAlgorithmEnum for controlling the layout of html. 
WebSettings.PluginStateThe plugin state effects how plugins are treated on a page. 
WebSettings.RenderPriority 
WebSettings.TextSizeEnum for specifying the text size. 
WebSettings.ZoomDensityEnum for specifying the WebView's desired density. 
WebStorageFunctionality for manipulating the webstorage databases. 
WebStorage.QuotaUpdaterEncapsulates a callback function to be executed when a new quota is made available. 
WebView

A View that displays web pages. 

WebView.HitTestResult 
WebView.PictureListenerInterface to listen for new pictures as they change. 
WebView.WebViewTransportTransportation object for returning WebView across thread boundaries. 
WebViewClient 
WebViewDatabase 
WifiConfigurationA class representing a configured Wi-Fi network, including the security configuration. 
WifiConfiguration.AuthAlgorithmRecognized IEEE 802.11 authentication algorithms. 
WifiConfiguration.GroupCipherRecognized group ciphers. 
WifiConfiguration.KeyMgmtRecognized key management schemes. 
WifiConfiguration.PairwiseCipherRecognized pairwise ciphers for WPA. 
WifiConfiguration.ProtocolRecognized security protocols. 
WifiConfiguration.StatusPossible status of a network configuration. 
WifiInfoDescribes the state of any Wifi connection that is active or is in the process of being set up. 
WifiManagerThis class provides the primary API for managing all aspects of Wi-Fi connectivity. 
WifiManager.MulticastLockAllows an application to receive Wifi Multicast packets. 
WifiManager.WifiLockAllows an application to keep the Wi-Fi radio awake. 
WildcardTypeThis interface represents a wildcard type, such as the simple wildcard '?', the upper bounded wildcard '? extends Closeable', the multiple upper bounded wildcard '? extends Closeable & Flushable' or the lower bounded wildcard '? super OutputStream'
WindowAbstract base class for a top-level window look and behavior policy. 
Window.CallbackAPI from a Window back to its caller. 
WindowManagerThe interface that apps use to talk to the window manager. 
WindowManager.BadTokenExceptionException that is thrown when trying to add view whose WindowManager.LayoutParams token is invalid. 
WindowManager.LayoutParams 
WireLogs data to the wire LOG. 
WorkSourceDescribes the source of some work that may be done by someone else. 
WrapperThis class is an actual usage of the wrapper pattern for JDBC classes. 
WrapperListAdapterList adapter that wraps another list adapter. 
WrapTogetherSpan 
WritableByteChannelA WritableByteChannel is a type of Channel that can write bytes. 
WriteAbortedExceptionSignals that the readObject() method has detected an exception marker in the input stream. 
WriterThe base class for all writers. 

X

X500PrincipalRepresents an X.500 principal, which holds the distinguished name of some network entity. 
X509CertificateAbstract base class for X.509 certificates. 
X509CertificateAbstract base class for X.509 certificates. 
X509CertSelectorA certificate selector (CertSelector for selecting X509Certificates that match the specified criteria. 
X509CRLAbstract base class for X.509 certificate revocation lists (CRL). 
X509CRLEntryAbstract base class for entries in a certificate revocation list (CRL). 
X509CRLSelectorA CRL selector (CRLSelector for selecting X509CRLs that match the specified criteria. 
X509EncodedKeySpecThe key specification of an X.509 encoded key in ASN.1 format. 
X509ExtendedKeyManagerThe abstract extension for the X509KeyManager interface. 
X509ExtensionThe interface specifying an X.509 Certificate or CRL extension. 
X509HostnameVerifierInterface for checking if a hostname matches the names stored inside the server's X.509 certificate. 
X509KeyManagerA Key Manager for X509 certificate-based key pairs. 
X509TrustManagerThe trust manager for X509 certificates to be used to perform authentication for secure sockets. 
XfermodeXfermode is the base class for objects that are called to implement custom "transfer-modes" in the drawing pipeline. 
XmlXML utility methods. 
Xml.EncodingSupported character encodings. 
XMLConstants

Utility class to contain basic XML values as constants. 

XMLFilterInterface for an XML filter. 
XMLFilterImplBase class for deriving an XML filter. 
XMLFormatterFormatter to convert a LogRecord into an XML string. 
XMLGregorianCalendar

Representation for W3C XML Schema 1.0 date/time datatypes. 

XmlPullParserXML Pull Parser is an interface that defines parsing functionality provided in XMLPULL V1 API (visit this website to learn more about API and its implementations). 
XmlPullParserExceptionThis exception is thrown to signal XML Pull Parser related faults. 
XmlPullParserFactoryThis class is used to create implementations of XML Pull Parser defined in XMPULL V1 API. 
XMLReaderInterface for reading an XML document using callbacks. 
XMLReaderAdapterAdapt a SAX2 XMLReader as a SAX1 Parser. 
XMLReaderFactoryFactory for creating an XML reader. 
XmlResourceParserThe XML parsing interface returned for an XML resource. 
XmlSerializerDefine an interface to serialization of XML Infoset. 
XPath

XPath provides access to the XPath evaluation environment and expressions. 

XPathConstants

XPath constants. 

XPathExceptionXPathException represents a generic XPath exception. 
XPathExpression

XPathExpression provides access to compiled XPath expressions. 

XPathExpressionExceptionXPathExpressionException represents an error in an XPath expression. 
XPathFactory

An XPathFactory instance can be used to create XPath objects. 

XPathFactoryConfigurationExceptionXPathFactoryConfigurationException represents a configuration error in a XPathFactory environment. 
XPathFunction

XPathFunction provides access to XPath functions. 

XPathFunctionExceptionXPathFunctionException represents an error with an XPath function. 
XPathFunctionResolver

XPathFunctionResolver provides access to the set of user defined XPathFunctions. 

XPathVariableResolver

XPathVariableResolver provides access to the set of user defined XPath variables. 

Y

YuvImageYuvImage contains YUV data and provides a method that compresses a region of the YUV data to a Jpeg. 

Z

ZipEntryAn instance of ZipEntry represents an entry within a ZIP-archive
ZipErrorThrown when an unrecoverable ZIP error has occurred. 
ZipExceptionThis runtime exception is thrown by ZipFile and ZipInputStream when the file or stream is not a valid ZIP file. 
ZipFileThis class provides random read access to a ZIP-archive file. 
ZipInputStreamThis class provides an implementation of FilterInputStream that uncompresses data from a ZIP-archive input stream. 
ZipOutputStreamThis class provides an implementation of FilterOutputStream that compresses data entries into a ZIP-archive output stream. 
ZoomButton 
ZoomButtonsControllerThe ZoomButtonsController handles showing and hiding the zoom controls and positioning it relative to an owner view. 
ZoomButtonsController.OnZoomListenerInterface that will be called when the user performs an interaction that triggers some action, for example zooming. 
ZoomControlsThe ZoomControls class displays a simple set of controls used for zooming and provides callbacks to register for events.