Class Index - Android SDK

A B C D E F G H I J K L M N O P Q R S T U V W X Z

A

AbortableHttpRequest	Interface representing an HTTP request that can be aborted by shutting down the underlying HTTP connection.
AbsListView	Common code shared between ListView and GridView
AbsListView.LayoutParams	AbsListView extends LayoutParams to provide a place to hold the view type.
AbsListView.OnScrollListener	Interface definition for a callback to be invoked when the list or grid has been scrolled.
AbsListView.RecyclerListener	A 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.LayoutParams	Per-child layout information associated with AbsoluteLayout.
AbsoluteSizeSpan
AbsSavedState	A Parcelable implementation that should be used by inheritance hierarchies to ensure the state of all classes along the chain is saved.
AbsSeekBar
AbsSpinner	An abstract base class for spinner widgets.
AbstractAuthenticationHandler
AbstractClientConnAdapter	Abstract adapter from operated to managed client connections.
AbstractCollection<E>	Class `AbstractCollection` is an abstract implementation of the `Collection` interface.
AbstractConnPool	An abstract connection pool.
AbstractCookieAttributeHandler
AbstractCookieSpec	Abstract cookie specification which can delegate the job of parsing, validation or matching cookie attributes to a number of arbitrary CookieAttributeHandlers.
AbstractCursor	This 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.SelfContentObserver	Cursors use this class to track changes others make to their URI.
AbstractExecutorService	Provides default implementation of ExecutorService execution methods.
AbstractHttpClient	Convenience base class for HTTP client implementations.
AbstractHttpClientConnection	Abstract client-side HTTP connection capable of transmitting and receiving data using arbitrary SessionInputBuffer and SessionOutputBuffer
AbstractHttpEntity	Abstract base class for entities.
AbstractHttpMessage	Basic implementation of an HTTP message that can be modified.
AbstractHttpParams	Abstract base class for parameter collections.
AbstractHttpServerConnection	Abstract server-side HTTP connection capable of transmitting and receiving data using arbitrary SessionInputBuffer and SessionOutputBuffer
AbstractInputMethodService	AbstractInputMethodService provides a abstract base class for input methods.
AbstractInputMethodService.AbstractInputMethodImpl	Base class for derived classes to implement their InputMethod interface.
AbstractInputMethodService.AbstractInputMethodSessionImpl	Base class for derived classes to implement their InputMethodSession interface.
AbstractInterruptibleChannel	`AbstractInterruptibleChannel` 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>	This class is an abstract implementation of the `Map` interface.
AbstractMessageParser	Message parser base class.
AbstractMessageWriter
AbstractMethodError	Thrown by the virtual machine when an abstract method is called.
AbstractPooledConnAdapter	Abstract adapter from pool entries to managed client connections.
AbstractPoolEntry	A pool entry for use by connection manager implementations.
AbstractPreferences	This 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.
AbstractQueuedSynchronizer	Provides a framework for implementing blocking locks and related synchronizers (semaphores, events, etc) that rely on first-in-first-out (FIFO) wait queues.
AbstractQueuedSynchronizer.ConditionObject	Condition implementation for a AbstractQueuedSynchronizer serving as the basis of a Lock implementation.
AbstractSelectableChannel	`AbstractSelectableChannel` is the base implementation class for selectable channels.
AbstractSelectionKey	`AbstractSelectionKey` is the base implementation class for selection keys.
AbstractSelector	`AbstractSelector` is the base implementation class for selectors.
AbstractSequentialList<E>	AbstractSequentialList is an abstract implementation of the List interface.
AbstractSessionInputBuffer	Abstract base class for session input buffers that stream data from a InputStream.
AbstractSessionOutputBuffer	Abstract base class for session output buffers that stream data to an OutputStream.
AbstractSet<E>	An AbstractSet is an abstract implementation of the Set interface.
AbstractVerifier	Abstract base class for all standard X509HostnameVerifier implementations.
AbstractWindowedCursor	A base class for Cursors that store their data in CursorWindows.
AccelerateDecelerateInterpolator	An interpolator where the rate of change starts and ends slowly but accelerates through the middle.
AccelerateInterpolator	An interpolator where the rate of change starts out slowly and and then accelerates.
AccessControlContext	`AccessControlContext` encapsulates the `ProtectionDomain`s on which access control decisions are based.
AccessControlException	`AccessControlException` is thrown if the access control infrastructure denies protected access due to missing permissions.
AccessController	`AccessController` provides static methods to perform access control checks and privileged operations.
AccessibleObject	`AccessibleObject` is the superclass of all member reflection classes (Field, Constructor, Method).
Acl	The Access Control List (ACL) interface definition.
AclEntry	The Access Control List Entry interface definition.
AclNotFoundException	The exception, that is thrown when a reference to a non-existent Access Control List (ACL) is made.
Activity	An activity is a single, focused thing that the user can do.
ActivityGroup	A screen that contains and runs multiple embedded activities.
ActivityInfo	Information 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.
ActivityManager	Interact with the overall activities running in the system.
ActivityManager.MemoryInfo	Information you can retrieve about the available memory through getMemoryInfo(ActivityManager.MemoryInfo).
ActivityManager.ProcessErrorStateInfo	Information you can retrieve about any processes that are in an error condition.
ActivityManager.RecentTaskInfo	Information you can retrieve about tasks that the user has most recently started or visited.
ActivityManager.RunningAppProcessInfo	Information you can retrieve about a running process.
ActivityManager.RunningServiceInfo	Information you can retrieve about a particular Service that is currently running in the system.
ActivityManager.RunningTaskInfo	Information you can retrieve about a particular task that is currently "running" in the system.
ActivityNotFoundException	This 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.
ActivityTestCase	This is common code used to support Activity test cases.
ActivityUnitTestCase<T extends Activity>	This class provides isolated testing of a single activity.
Adapter	An 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.AdapterContextMenuInfo	Extra menu information provided to the onCreateContextMenu(ContextMenu, View, ContextMenuInfo) callback when a context menu is brought up for this AdapterView.
AdapterView.OnItemClickListener	Interface definition for a callback to be invoked when an item in this AdapterView has been clicked.
AdapterView.OnItemLongClickListener	Interface definition for a callback to be invoked when an item in this view has been clicked and held.
AdapterView.OnItemSelectedListener	Interface definition for a callback to be invoked when an item in this view has been selected.
Address	A class representing an Address, i.e, a set of Strings describing a location.
Adler32	The Adler-32 class is used to compute the `Adler32` checksum from a set of data.
AlarmManager	This class provides access to the system alarm services.
AlertDialog	A subclass of Dialog that can display one, two or three buttons.
AlertDialog.Builder
AlgorithmParameterGenerator	`AlgorithmParameterGenerator` is an engine class which is capable of generating parameters for the algorithm it was initialized with.
AlgorithmParameterGeneratorSpi	`AlgorithmParameterGeneratorSpi` is the Service Provider Interface (SPI) definition for `AlgorithmParameterGenerator`.
AlgorithmParameters	`AlgorithmParameters` is an engine class which provides algorithm parameters.
AlgorithmParameterSpec	The marker interface for algorithm parameter specifications.
AlgorithmParametersSpi	`AlgorithmParametersSpi` is the Service Provider Interface (SPI) definition for `AlgorithmParameters`.
AliasActivity	Stub activity that launches another activity (and then finishes itself) based on information in its component's manifest meta-data.
AlignmentSpan
AlignmentSpan.Standard
AllClientPNames	Collected parameter names for the HttpClient module.
AllocationLimitError	Is thrown when an allocation limit is exceeded.
AllowAllHostnameVerifier	The ALLOW_ALL HostnameVerifier essentially turns hostname verification off.
AllPermission	`AllPermission` represents the permission to perform any operation.
AlphaAnimation	An animation that controls the alpha level of an object.
AlphabetIndexer	A helper class for adapters that implement the SectionIndexer interface.
AlreadyConnectedException	An `AlreadyConnectedException` is thrown when an attempt is made to connect a SocketChannel that is already connected.
AlteredCharSequence	An 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.
AnalogClock	This widget display an analogic clock with two hands for hours and minutes.
AndroidCharacter	AndroidCharacter exposes some character properties that are not easily accessed from java.lang.Character.
AndroidException	Base class for all checked exceptions thrown by the Android frameworks.
AndroidRuntimeException	Base class for all unchecked exceptions thrown by the Android frameworks.
AndroidTestCase	Extend this if you need to access Resources or other things that depend on Activity Context.
AndroidTestRunner
Animation	Abstraction for an Animation that can be applied to Views, Surfaces, or other objects.
Animation.AnimationListener	An animation listener receives notifications from an animation.
Animation.Description	Utility class to parse a string description of a size.
AnimationDrawable	An 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.
AnimationSet	Represents a group of Animations that should be played together.
AnimationUtils	Defines common utilities for working with animations.
AnnotatedElement	This interface provides reflective access to annotation information.
Annotation	Annotations 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.
Annotation	Defines the interface implemented by all annotations.
Annotation	Wrapper for a text attribute value which represents an annotation.
AnnotationFormatError	Indicates that an annotation in the binary representation of a class is syntactically incorrect and the annotation parser is unable to process it.
AnnotationTypeMismatchException	Indicates that an annotation type has changed since it was compiled or serialized.
Appendable	Declares methods to append characters or character sequences.
Application	Base class for those who need to maintain global application state.
ApplicationInfo	Information 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.
AppWidgetHost	AppWidgetHost provides the interaction with the AppWidget service for apps, like the home screen, that want to embed AppWidgets in their UI.
AppWidgetHostView	Provides the glue to show AppWidget views.
AppWidgetManager	Updates AppWidget state; gets information about installed AppWidget providers and other AppWidget related state.
AppWidgetProvider	A conveience class to aid in implementing an AppWidget provider.
AppWidgetProviderInfo	Describes the meta data for an installed AppWidget provider.
ArcShape	Creates an arc shape.
ArithmeticException	Thrown when the an invalid arithmetic operation is attempted.
Array	This class provides static methods to create and access arrays dynamically.
Array	A 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.
ArrayIndexOutOfBoundsException	Thrown 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.
Arrays	`Arrays` contains static methods which operate on arrays.
ArrayStoreException	Thrown when a program attempts to store an element of an incompatible type in an array.
ArrowKeyMovementMethod
Assert	A set of assert methods.
AssertionError	Thrown when an assertion has failed.
AssertionFailedError	Thrown when an assertion failed.
AssertionFailedError	Thrown when an assertion failed.
AssetFileDescriptor	File descriptor of an entry in the AssetManager.
AssetFileDescriptor.AutoCloseInputStream	An InputStream you can create on a ParcelFileDescriptor, which will take care of calling ParcelFileDescritor.close() for you when the stream is closed.
AssetFileDescriptor.AutoCloseOutputStream	An OutputStream you can create on a ParcelFileDescriptor, which will take care of calling ParcelFileDescritor.close() for you when the stream is closed.
AssetManager	Provides access to an application's raw asset files; see Resources for the way most applications will want to retrieve their resource data.
AssetManager.AssetInputStream
AsynchronousCloseException	An `AsynchronousCloseException` is thrown when the underlying channel for an I/O operation is closed by another thread.
AsyncPlayer	Plays 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.
AsyncQueryHandler	A 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.Status	Indicates the current status of the task.
AtomicBoolean	A `boolean` value that may be updated atomically.
AtomicInteger	An `int` value that may be updated atomically.
AtomicIntegerArray	An `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.
AtomicLong	A `long` value that may be updated atomically.
AtomicLongArray	A `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.
Attr	The `Attr` interface represents an attribute in an `Element` object.
AttributedCharacterIterator	Extends the CharacterIterator interface, adding support for iterating over attributes and not only characters.
AttributedCharacterIterator.Attribute	Defines keys for text attributes.
AttributedString	Holds 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.
Attributes	The `Attributes` class is used to store values for manifest entries.
Attributes	Interface for a list of XML attributes.
Attributes.Name	The name part of the name/value pairs constituting an attribute as defined by the specification of the JAR manifest.
Attributes2	SAX2 extension to augment the per-attribute information provided though Attributes.
Attributes2Impl	SAX2 extension helper for additional Attributes information, implementing the Attributes2 interface.
AttributeSet	A collection of attributes, as found associated with a tag in an XML document.
AttributesImpl	Default implementation of the Attributes interface.
AudioFormat	The AudioFormat class is used to access a number of audio format and channel configuration constants.
AudioManager	AudioManager provides access to volume and ringer mode control.
AudioRecord	The AudioRecord class manages the audio resources for Java applications to record audio from the audio input hardware of the platform.
AudioRecord.OnRecordPositionUpdateListener	Interface 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).
AudioTrack	The AudioTrack class manages and plays a single audio resource for Java applications.
AudioTrack.OnPlaybackPositionUpdateListener	Interface 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.
AUTH	Constants and static helpers related to the HTTP authentication.
AuthenticationException	Signals a failure in authentication process
AuthenticationHandler
Authenticator	An implementation of this class is able to obtain authentication information for a connection in several ways.
Authenticator.RequestorType	Enumeration class for the origin of the authentication request.
AuthParamBean
AuthParams	This class implements an adaptor around the HttpParams interface to simplify manipulation of the HTTP authentication specific parameters.
AuthPermission	Governs the use of methods in this package and also its subpackages.
AuthPNames	Parameter names for HttpAuth.
AuthPolicy
AuthProvider	`AuthProvider` is an abstract superclass for Java Security `Provider` which provide login and logout.
AuthScheme	This interface represents an abstract challenge-response oriented authentication scheme.
AuthSchemeBase	Abstract authentication scheme class that serves as a basis for all authentication schemes supported by HttpClient.
AuthSchemeFactory
AuthSchemeRegistry	Authentication scheme registry that can be used to obtain the corresponding authentication scheme implementation for a given type of authorization challenge.
AuthScope	The 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.
AuthState	This 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.Validator	This interface is used to make sure that the text entered in this TextView complies to a certain format.
AutoText	This class accesses a dictionary of corrections to frequent misspellings.
AvoidXfermode	AvoidXfermode 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
BackingStoreException	An exception to indicate that an error was encountered while accessing the backing store.
BadPaddingException	The 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.
BadParcelableException	The object you are calling has died, because its hosting process no longer exists.
BaseAdapter	Common 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
BaseExpandableListAdapter	Base class for a ExpandableListAdapter used to provide data and Views from some data to an expandable list view.
BaseInputConnection	Base class for implementors of the InputConnection interface, taking care of most of the common behavior for providing a connection to an Editable.
BaseKeyListener
BaseTestRunner	Base class for all test runners.
BasicClientCookie	HTTP "magic-cookie" represents a piece of state information that the HTTP agent and the target server can exchange to maintain a session.
BasicClientCookie2	HTTP "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
BasicCookieStore	Default implementation of CookieStore
BasicCredentialsProvider	Default implementation of CredentialsProvider
BasicDomainHandler
BasicEofSensorWatcher	Basic implementation of EofSensorWatcher.
BasicExpiresHandler
BasicHeader	Represents an HTTP header field.
BasicHeaderElement	One element of an HTTP header's value.
BasicHeaderElementIterator	Basic implementation of a HeaderElementIterator.
BasicHeaderIterator	Basic implementation of a HeaderIterator.
BasicHeaderValueFormatter	Basic implementation for formatting header value elements.
BasicHeaderValueParser	Basic implementation for parsing header values into elements.
BasicHttpContext	Default implementation of the HttpContext.
BasicHttpEntity	A generic streamed entity being received on a connection.
BasicHttpEntityEnclosingRequest	Basic implementation of a request with an entity that can be modified.
BasicHttpParams	This class represents a collection of HTTP protocol parameters.
BasicHttpProcessor	Keeps lists of interceptors for processing requests and responses.
BasicHttpRequest	Basic implementation of an HTTP request that can be modified.
BasicHttpResponse	Basic implementation of an HTTP response that can be modified.
BasicLineFormatter	Interface for formatting elements of the HEAD section of an HTTP message.
BasicLineParser	Basic parser for lines in the head section of an HTTP message.
BasicListHeaderIterator	Implementation of a HeaderIterator based on a List.
BasicManagedEntity	An entity that releases a connection.
BasicMaxAgeHandler
BasicNameValuePair	A simple class encapsulating an attribute/value pair.
BasicPathHandler
BasicPermission	`BasicPermission` is the common base class of all permissions which have a name but no action lists.
BasicPooledConnAdapter	A connection wrapper and callback handler.
BasicPoolEntry	Basic implementation of a connection pool entry.
BasicPoolEntryRef	A weak reference to a BasicPoolEntry.
BasicRequestLine	The first line of an HttpRequest.
BasicResponseHandler	A ResponseHandler that returns the response body as a String for successful (2xx) responses.
BasicRouteDirector	Basic implementation of an HttpRouteDirector.
BasicScheme	Basic authentication scheme as defined in RFC 2617.
BasicSchemeFactory
BasicSecureHandler
BasicStatusLine	Represents a status line as returned from a HTTP server.
BasicTokenIterator	Basic implementation of a TokenIterator.
BasicUserPrincipal	Basic user principal used for HTTP authentication
BatchUpdateException	This exception is thrown if a problem occurs during a batch update operation.
BatteryManager	The 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
Bidi	Provides the Unicode Bidirectional Algorithm.
BigDecimal	This class represents immutable arbitrary precision decimal numbers.
BigInteger	This class represents immutable integer numbers of arbitrary length.
Binder	Base class for a remotable object, the core part of a lightweight remote procedure call mechanism defined by IBinder.
BindException	A `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.CompressFormat	Specifies the known formats a bitmap can be compressed into
Bitmap.Config
BitmapDrawable	A Drawable that wraps a bitmap and can be tiled, stretched, or aligned.
BitmapFactory	Creates Bitmap objects from various sources, including files, streams, and byte-arrays.
BitmapFactory.Options
BitmapShader
BitSet	The `BitSet` class implements a bit field.
Blob	A Java interface representing the SQL `BLOB` type.
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.
BlurMaskFilter
BlurMaskFilter.Blur
Boolean	The wrapper for the primitive type `boolean`.
BoringLayout	A BoringLayout is a very simple Layout implementation for text that fits on a single line and is all left-to-right characters.
BoringLayout.Metrics
BreakIterator	Locates boundaries in text.
BroadcastReceiver	Base class for code that will receive intents sent by sendBroadcast().
BrokenBarrierException	Exception 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
BrowserCompatHostnameVerifier	The HostnameVerifier that works the same way as Curl and Firefox.
BrowserCompatSpec	Cookie specification that strives to closely mimic (mis)behavior of common web browser applications such as Microsoft Internet Explorer and Mozilla FireFox.
BrowserCompatSpecFactory
Buffer	A buffer is a list of elements of a specific primitive type.
BufferedHeader	This class represents a raw HTTP header whose content is parsed 'on demand' only when the header value needs to be consumed.
BufferedHttpEntity	A wrapping entity that buffers it content if necessary.
BufferedInputStream	Wraps an existing InputStream and buffers the input.
BufferedOutputStream	Wraps an existing OutputStream and buffers the output.
BufferedReader	Wraps an existing Reader and buffers the input.
BufferedWriter	Wraps an existing Writer and buffers the output.
BufferOverflowException	A `BufferOverflowException` is thrown when elements are written to a buffer but there is not enough remaining space in the buffer.
BufferUnderflowException	A `BufferUnderflowException` is thrown when elements are read from a buffer but there are not enough remaining elements in the buffer.
Build	Information about the current build, extracted from system properties.
Build.VERSION	Various version strings.
BulletSpan
Bundle	A mapping from String values to various Parcelable types.
Button	`Button` represents a push-button widget.
Byte	The wrapper for the primitive type `byte`.
ByteArrayBuffer	A resizable byte array.
ByteArrayEntity	An entity whose content is retrieved from a byte array.
ByteArrayInputStream	A specialized InputStream for reading the contents of a byte array.
ByteArrayOutputStream	A specialized OutputStream for class for writing content to an (internal) byte array.
ByteBuffer	A buffer for bytes.
ByteChannel	A ByteChannel is both readable and writable.
ByteOrder	Defines byte order constants.

C

CacheManager	The class CacheManager provides the persistent cache of content that is received over the network.
CacheManager.CacheResult
CacheRequest	`CacheRequest` is a kind of channel for storing resource data in the `ResponseCache`.
CacheResponse	`CacheResponse` is used for getting resource data from the installed `ResponseCache`.
Calendar	`Calendar` 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.
CallableStatement	An interface used to call Stored Procedures.
Callback	Defines an empty base interface for all `Callback`s used during authentication.
CallbackHandler	Needs to be implemented by classes that want to handle authentication Callbacks.
CallLog	The CallLog provider contains information about placed and received calls.
CallLog.Calls	Contains the recent calls.
Camera
Camera	The Camera class is used to connect/disconnect with the camera service, set capture settings, start/stop preview, snap a picture, and retrieve frames for encoding for video.
Camera.AutoFocusCallback	Handles the callback for the camera auto focus.
Camera.ErrorCallback	Handles the camera error callback.
Camera.Parameters	Handles the parameters for pictures created by a Camera service.
Camera.PictureCallback	Handles the callback for when a picture is taken.
Camera.PreviewCallback	Used to get a copy of each preview frame.
Camera.ShutterCallback	An interface which contains a callback for the shutter closing after taking a picture.
Camera.Size	Handles the picture size (dimensions).
CancellationException	Exception indicating that the result of a value-producing task, such as a FutureTask, cannot be retrieved because the task was cancelled.
CancelledKeyException	A `CancelledKeyException` is thrown when an invalid selection key is used.
Canvas	The Canvas class holds the "draw" calls.
Canvas.EdgeType
Canvas.VertexMode
CDATASection	CDATA sections are used to escape blocks of text containing characters that would otherwise be regarded as markup.
CellLocation	Abstract class that represents the location of the device. Currently the only subclass is GsmCellLocation.
Certificate	This interface is deprecated. Replaced by behavior in javax.security.cert
Certificate	Abstract class to represent identity certificates.
Certificate	Abstract class to represent identity certificates.
Certificate.CertificateRep	The alternate `Serializable` class to be used for serialization and deserialization of `Certificate` objects.
CertificateEncodingException	The exception that is thrown when an error occurs while a `Certificate` is being encoded.
CertificateEncodingException	The exception that is thrown when an error occurs while a `Certificate` is being encoded.
CertificateException	The base class for all `Certificate` related exceptions.
CertificateException	The base class for all `Certificate` related exceptions.
CertificateExpiredException	The exception that is thrown when a `Certificate` has expired.
CertificateExpiredException	The exception that is thrown when a `Certificate` has expired.
CertificateFactory	This class implements the functionality of a certificate factory algorithm, relying on parsing a stream of bytes.
CertificateFactorySpi	This class defines the Service Provider Interface (SPI) for the `CertificateFactory` class.
CertificateNotYetValidException	The exception that is thrown when a `Certificate` is not yet valid or will not yet be valid on a specified date.
CertificateNotYetValidException	The exception that is thrown when a `Certificate` is not yet valid.
CertificateParsingException	The exception that is thrown when a `Certificate` can not be parsed.
CertificateParsingException	The exception that is thrown when a `Certificate` can not be parsed.
CertPath	An immutable certificate path that can be validated.
CertPath.CertPathRep	The alternate `Serializable` class to be used for serialization and deserialization on `CertPath` objects.
CertPathBuilder	This class implements the functionality of a builder for an unverified Certification Paths from a specified certificate to a trust anchor.
CertPathBuilderException	The exception that is thrown when a `CertPathBuilder` method fails.
CertPathBuilderResult	The interface for results generated by build(CertPathParameters).
CertPathBuilderSpi	The Service Provider Interface (SPI) for the `CertPathBuilder` class to be implemented by security providers.
CertPathParameters	The interface specification for certification path algorithm parameters.
CertPathTrustManagerParameters	Certification path parameters to provide to certification path based TrustManager.
CertPathValidator	This class provides the functionality for validating certification paths (certificate chains) establishing a trust chain from a certificate to a trust anchor.
CertPathValidatorException	The exception that is thrown when a certification path (or certificate chain) cannot be validated.
CertPathValidatorResult	The interface specification for certification path validation results.
CertPathValidatorSpi	The Service Provider Interface (SPI) for the `CertPathValidator` class to be implemented by security providers.
CertSelector	The interface specification to determine whether a `Certificate` meets some criteria.
CertStore	This class provides the functionality to retrieve `Certificate`s and `CRL`s from a read-only repository.
CertStoreException	The exception that is thrown when an access to a `CertStore` fails.
CertStoreParameters	The marker interface specifying the parameters used to initialize a `CertStore` instance.
CertStoreSpi	The Service Provider Interface (SPI) definition for the `CertStore` class to be implemented by security providers.
Channel	A channel is a conduit to I/O services covering such items as files, sockets, hardware devices, I/O ports or some software component.
Channels	This class provides several utilities to get I/O streams from channels.
Character	The wrapper for the primitive type `char`.
Character.Subset	Represents a subset of the Unicode character set.
Character.UnicodeBlock	Represents a block of Unicode characters, as defined by the Unicode 4.0.1 specification.
CharacterCodingException	A `CharacterCodingException` is thrown when an encoding or decoding error occurs.
CharacterData	The `CharacterData` interface extends Node with a set of attributes and methods for accessing character data in the DOM.
CharacterIterator	An interface for the bidirectional iteration over a group of characters.
CharacterPickerDialog	Dialog for choosing accented characters related to a base character.
CharacterStyle	The classes that affect character-level text formatting extend this class.
CharArrayBuffer	This is used for copyStringToBuffer(int, CharArrayBuffer)
CharArrayBuffer	A resizable char array.
CharArrayReader	A specialized Reader for reading the contents of a char array.
CharArrayWriter	A specialized Writer for class for writing content to an (internal) char array.
CharBuffer	A buffer of chars.
CharConversionException	The top level class for character conversion exceptions.
CharSequence	This interface represents an ordered set of characters and defines the methods to probe them.
Charset	A charset defines a mapping between a Unicode character sequence and a byte sequence.
CharsetDecoder	A converter that can convert a byte sequence from a charset into a 16-bit Unicode character sequence.
CharsetEncoder	A converter that can converts a 16-bit Unicode character sequence to a byte sequence in some charset.
CharsetProvider	The service provider class for character sets.
Checkable	Defines 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.
CheckBoxPreference	A Preference that provides checkbox widget functionality.
CheckedInputStream	The `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.
CheckedOutputStream	The `CheckedOutputStream` class is used to maintain a running checksum of all data written to a stream.
CheckedTextView	An extension to TextView that supports the Checkable interface.
Checksum	Holds information about a checksum which was computed with the methods implementing a checksum algorithm.
ChoiceFormat	Returns a fixed string based on a numeric value.
Chronometer	Class that implements a simple timer.
Chronometer.OnChronometerTickListener	A callback that notifies when the chronometer has incremented on its own.
ChunkedInputStream	Implements chunked transfer coding.
ChunkedOutputStream	Implements chunked transfer coding.
Cipher	This class provides access to implementations of cryptographic ciphers for encryption and decryption.
CipherInputStream	This 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.
CipherOutputStream	This 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.
CipherSpi	This class defines the Service Provider Interface (SPI) for cryptographic ciphers.
CircularRedirectException	Signals a circular redirect
Class<T>	The in-memory representation of a Java class.
ClassCastException	Thrown when a program attempts to cast a an object to a type with which it is not compatible.
ClassCircularityError	Thrown 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.
ClassFormatError	Thrown 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.
ClassLoader	Loads classes and resources from a repository.
ClassNotFoundException	Thrown when a class loader is unable to find a class.
ClickableSpan	If 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.
ClientConnectionManager	Management interface for client connections.
ClientConnectionManagerFactory	A factory for creating new ClientConnectionManager instances.
ClientConnectionOperator	Interface for opening connections.
ClientConnectionRequest	Encapsulates a request for a ManagedClientConnection.
ClientContext	Context attribute names for client.
ClientContextConfigurer
ClientCookie	ClientCookie 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.
ClientParamBean
ClientParamsStack	Represents a stack of parameter collections.
ClientPNames	Parameter names for the HttpClient module.
ClientProtocolException	Signals an error in the HTTP protocol.
ClipboardManager	Interface to the clipboard service, for placing and retrieving text in the global clipboard.
ClipDrawable	A Drawable that clips another Drawable based on this Drawable's current level value.
Clob	A Java interface mapping for the SQL CLOB type.
Cloneable	This (empty) interface must be implemented by all classes that wish to support cloning.
CloneNotSupportedException	Thrown when a program attempts to clone an object which does not support the Cloneable interface.
CloneUtils	A collection of utilities to workaround limitations of Java clone framework.
Closeable	Defines an interface for classes that can (or need to) be closed once they are not used any longer.
ClosedByInterruptException	A `ClosedByInterruptException` is thrown when a thread is interrupted in a blocking I/O operation.
ClosedChannelException	A `ClosedChannelException` is thrown when a channel is closed for the type of operation attempted.
ClosedSelectorException	A `ClosedSelectorException` is thrown when a selector is closed and an I/O operation is attempted.
CoderMalfunctionError	A `CoderMalfunctionError` is thrown when the encoder/decoder is malfunctioning.
CoderResult	Used to indicate the result of encoding/decoding.
CodeSigner	`CodeSigner` represents a signer of code.
CodeSource	`CodeSource` encapsulates the location from where code is loaded and the certificates that were used to verify that code.
CodingErrorAction	Used to indicate what kind of actions to take in case of encoding/decoding errors.
CollationElementIterator	Created by a `RuleBasedCollator` to iterate through a string.
CollationKey	Represents a string under the rules of a specific `Collator` object.
Collator	Performs locale-sensitive string comparison.
Collection<E>	`Collection` is the root of the collection hierarchy.
CollectionCertStoreParameters	The parameters to initialize a Collection type `CertStore` instance.
Collections	`Collections` contains static methods which operate on `Collection` classes.
Color	The Color class defines methods for creating and converting color ints.
ColorDrawable	A specialized Drawable that fills the Canvas with a specified color, with respect to the clip region.
ColorFilter
ColorMatrix	5x4 matrix for transforming the color+alpha components of a Bitmap.
ColorMatrixColorFilter
ColorStateList	Lets you map View state sets to colors.
Comment	This interface inherits from `CharacterData` and represents the content of a comment, i.e., all the characters between the starting ' `<!--`' and ending '`-->`'.
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.
ComparisonFailure	Thrown when an assert equals for Strings failed.
ComparisonFailure	Thrown when an assert equals for Strings failed.
Compiler	Placeholder class for environments which explicitly manage the action of a Just In Time (JIT) compiler.
CompletionInfo	Information 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.
ComponentCallbacks	The set of callback APIs that are common to all application components (Activity, Service, ContentProvider, and Application).
ComponentInfo	Base class containing information common to all application components (ActivityInfo, ServiceInfo).
ComponentName	Identifier for a specific application component (Activity, Service, BroadcastReceiver, or ContentProvider) that is available.
ComposePathEffect
ComposeShader	A 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.OnCheckedChangeListener	Interface 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.
ConcurrentModificationException	An `ConcurrentModificationException` is thrown when a Collection is modified and an existing iterator on the Collection is used to modify the Collection as well.
Condition	`Condition` 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.
ConditionVariable	Class that implements the condition variable locking paradigm.
Config	Build configuration. The constants in this class vary depending on release vs. debug build. This is the configuration for release builds.
Configuration	This class describes all device configuration information that can impact the resources the application retrieves.
ConfigurationInfo	Information you can retrieve about hardware configuration preferences declared by an application.
ConnConnectionParamBean	Allows for setting parameters relating to connections on HttpParams.
ConnConnectionPNames	Parameter names for connections in HttpConn.
ConnectException	A `ConnectException` is thrown if a connection cannot be established to a remote host on a specific port.
Connection	A connection represents a link from a Java application to a database.
ConnectionClosedException	Indicates that a connection has been closed.
ConnectionEvent	Sent when specific events happen on a PooledConnection object.
ConnectionEventListener	An interface used to receive events generated by a PooledConnection.
ConnectionKeepAliveStrategy	Interface for deciding how long a connection can remain idle before being reused.
ConnectionPendingException	A `ConnectionPendingException` is thrown when an attempt is made to connect a SocketChannel that has a non-blocking connection already underway.
ConnectionPoolDataSource	An interface for the creation of `ConnectionPoolDataSource` objects.
ConnectionPoolTimeoutException	A timeout while waiting for an available connection from a connection manager.
ConnectionReleaseTrigger	Interface for releasing a connection.
ConnectionReuseStrategy	Interface for deciding whether a connection should be kept alive.
ConnectivityManager	Class that answers queries about the state of network connectivity.
ConnectTimeoutException	A timeout while connecting to an HTTP server or waiting for an available connection from an HttpConnectionManager.
ConnManagerParamBean	Allows for setting parameters relating to connection managers on HttpParams.
ConnManagerParams	This class represents a collection of HTTP protocol parameters applicable to client-side connection managers.
ConnManagerPNames	Parameter names for connection managers in HttpConn.
ConnPerRoute	This interface is intended for looking up maximum number of connections allowed for for a given route.
ConnPerRouteBean	This class maintains a map of HTTP routes to maximum number of connections allowed for those routes.
ConnPoolByRoute	A connection pool that maintains connections by route.
ConnRouteParamBean	Allows for setting parameters relating to connection routes on HttpParams.
ConnRouteParams	An adaptor for accessing route related parameters in HttpParams.
ConnRoutePNames	Parameter names for routing in HttpConn.
ConsoleHandler	A handler that writes log messages to the standard output stream `System.err`.
Constructor<T>	This class represents a constructor.
Contacts	The Contacts provider stores all information about contacts.
Contacts.ContactMethods	This table stores all non-phone contact methods and a reference to the person that the contact method belongs to.
Contacts.ContactMethodsColumns	Columns from the ContactMethods table that other tables join into themseleves.
Contacts.Extensions	The extensions for a person
Contacts.ExtensionsColumns
Contacts.GroupMembership
Contacts.Groups	This table contains the groups for an account.
Contacts.GroupsColumns	Columns from the groups table.
Contacts.Intents	Contains helper classes used to create or manage Intents that involve contacts.
Contacts.Intents.Insert	Convenience class that contains string constants used to create contact Intents.
Contacts.Intents.UI	Intents related to the Contacts app UI.
Contacts.OrganizationColumns	Columns from the Organizations table that other columns join into themselves.
Contacts.Organizations	A sub directory of a single person that contains all of their Phones.
Contacts.People	This table contains people.
Contacts.People.ContactMethods	A subdirectory of a single person that contains all of their ContactMethods.
Contacts.People.Extensions	The extensions for a person
Contacts.People.Phones	A sub directory of a single person that contains all of their Phones.
Contacts.PeopleColumns	Columns from the People table that other tables join into themselves.
Contacts.Phones	This table stores phone numbers and a reference to the person that the contact method belongs to.
Contacts.PhonesColumns	Columns from the Phones table that other columns join into themselves.
Contacts.Photos	The photos over all of the people
Contacts.PhotosColumns	Columns from the Photos table that other columns join into themselves.
Contacts.PresenceColumns	The IM presence columns with some contacts specific columns mixed in.
Contacts.Settings	The settings over all of the people
Contacts.SettingsColumns	Columns from the Settings table that other columns join into themselves.
ContentHandler	This class converts the content of a certain format (i.e.
ContentHandler	Receive notification of the logical content of a document.
ContentHandlerFactory	Defines a factory which is responsible for creating a `ContentHandler`.
ContentLengthInputStream	Stream that cuts off after a specified number of bytes.
ContentLengthOutputStream	A stream wrapper that closes itself after a defined number of bytes.
ContentLengthStrategy	Represents a strategy to determine the content length based on the properties of an HTTP message.
ContentObservable	A specialization of Observable for ContentObserver that provides methods for invoking the various callback methods of ContentObserver.
ContentObserver	Receives call backs for changes to content.
ContentProducer	An abstract entity content producer.
ContentProvider	Content providers are one of the primary building blocks of Android applications, providing content to applications.
ContentQueryMap	Caches 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.
ContentResolver	This class provides applications access to the content model.
ContentUris	Utility methods useful for working with content Uris, those with a "content" scheme.
ContentValues	This class is used to store a set of values that the ContentResolver can process.
Context	Interface to global information about an application environment.
ContextMenu	Extension of Menu for context menus providing functionality to modify the header of the context menu.
ContextMenu.ContextMenuInfo	Additional information regarding the creation of the context menu.
ContextThemeWrapper	A ContextWrapper that allows you to modify the theme from what is in the wrapped context.
ContextWrapper	Proxying implementation of Context that simply delegates all of its calls to another Context.
Cookie	HTTP "magic-cookie" represents a piece of state information that the HTTP agent and the target server can exchange to maintain a session.
CookieAttributeHandler	Ths interface represents a cookie attribute handler responsible for parsing, validating, and matching a specific cookie attribute, such as path, domain, port, etc.
CookieHandler	This class provides a way to manage cookies with a HTTP protocol handler.
CookieIdentityComparator	This cookie comparator can be used to compare identity of cookies.
CookieManager	CookieManager manages cookies according to RFC2109 spec.
CookieOrigin	CookieOrigin class incapsulates details of an origin server that are relevant when parsing, validating or matching HTTP cookies.
CookiePathComparator	This 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.
CookiePolicy
CookieSpec	Defines the cookie management specification.
CookieSpecBase	Cookie management functions shared by all specification.
CookieSpecFactory
CookieSpecParamBean
CookieSpecPNames	Parameter names for cookie specifications in HttpCookie.
CookieSpecRegistry	Cookie specification registry that can be used to obtain the corresponding cookie specification implementation for a given type of type or version of cookie.
CookieStore	Abstract cookie store.
CookieSyncManager	The class CookieSyncManager is used to synchronize the browser cookies between RAM and FLASH.
CopyOnWriteArrayList<E>	Implements a ArrayList variant that is thread-safe.
CopyOnWriteArraySet<E>	A Set that uses CopyOnWriteArrayList for all of its operations.
CoreConnectionPNames	Defines parameter names for connections in HttpCore.
CoreProtocolPNames	Defines parameter names for protocol execution in HttpCore.
CornerPathEffect
CountDownLatch	A synchronization aid that allows one or more threads to wait until a set of operations being performed in other threads completes.
CountDownTimer	Schedule a countdown until a time in the future, with regular notifications on intervals along the way.
CRC32	The CRC32 class is used to compute a CRC32 checksum from data provided as input value.
Credentials	A class for representing UNIX credentials passed via ancillary data on UNIX domain sockets.
Credentials	User name and password based authentication credentials.
CredentialsProvider	Abstract credentials provider.
Criteria	A class indicating the application criteria for selecting a location provider.
CRL	This class represents Certificate Revocation Lists (CRLs) maintained by a certificate authority.
CRLException	The exception that is thrown if errors occur during handling of `CRL`s.
CRLSelector	The interface specification for determining whether a CRL meets some criteria to select CRL objects among a set of `CRL`s.
CrossProcessCursor
Currency	This class represents a currency as identified in the ISO 4217 currency codes.
Cursor	This interface provides random read-write access to the result set returned by a database query.
CursorAdapter	Adapter that exposes data from a Cursor to a ListView widget.
CursorIndexOutOfBoundsException	An exception indicating that a cursor is out of bounds.
CursorJoiner	Does a join on two cursors using the specified columns.
CursorJoiner.Result	The result of a call to next().
CursorTreeAdapter	An adapter that exposes data from a series of Cursors to an ExpandableListView widget.
CursorWindow	A buffer containing multiple cursor rows.
CursorWrapper	Wrapper class for Cursor that delegates all calls to the actual cursor object
CycleInterpolator	Repeats the animation for a specified number of cycles.
CyclicBarrier	A synchronization aid that allows a set of threads to all wait for each other to reach a common barrier point.

D

DashPathEffect
DatabaseMetaData	An interface which provides comprehensive information about the database management system and its supported features.
DatabaseUtils	Static utility methods for dealing with databases and Cursors.
DatabaseUtils.InsertHelper	This class allows users to do multiple inserts into a table but compile the SQL insert statement only once, which may increase performance.
DataFormatException	`DataFormatException` is used to indicate an error in the format of a particular data stream which is to be uncompressed.
DatagramChannel	A `DatagramChannel` is a selectable channel that represents a partial abstraction of a datagram socket.
DatagramPacket	This class represents a datagram packet which contains data either to be sent or received through a `DatagramSocket`.
DatagramSocket	This class implements a UDP socket for sending and receiving `DatagramPacket`.
DatagramSocketImpl	The abstract superclass for datagram and multicast socket implementations.
DatagramSocketImplFactory	This interface defines a factory for datagram socket implementations.
DataInput	Defines an interface for classes that are able to read typed data from some source.
DataInputStream	Wraps an existing InputStream and reads typed data from it.
DataOutput	Defines an interface for classes that are able to write typed data to some target.
DataOutputStream	Wraps an existing OutputStream and writes typed data to it.
DataSetObservable	A specialization of Observable for DataSetObserver that provides methods for invoking the various callback methods of DataSetObserver.
DataSetObserver	Receives call backs when a data set has been changed, or made invalid.
DataSource	An interface for the creation of `Connection` objects which represent a connection to a database.
DataTruncation	An 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).
Date	A class which can consume and produce dates in SQL `Date` format.
Date	`Date` represents a specific moment in time, to the millisecond.
DateFormat	Utility class for producing strings with formatted date/time.
DateFormat	An abstract class for date/time formatting subclasses which formats and parses dates or time in a language-independent manner.
DateFormat.Field	The instances of this inner class are used as attribute keys and values in `AttributedCharacterIterator` that the formatToCharacterIterator(Object) method returns.
DateFormatSymbols	Encapsulates localizable date-time formatting data, such as the names of the months, the names of the days of the week, and the time zone data.
DateKeyListener	For entering dates in a text field.
DateParseException	An exception to indicate an error parsing a date string.
DatePicker	A view for selecting a month / year / day based on a calendar like layout.
DatePicker.OnDateChangedListener	The callback used to indicate the user changes the date.
DatePickerDialog	A simple dialog containing an DatePicker.
DatePickerDialog.OnDateSetListener	The callback used to indicate the user is done filling in the date.
DateSorter	Sorts dates into the following groups: Today Yesterday five days ago one month ago older than a month ago
DateTimeKeyListener	For entering dates and times in the same text field.
DateUtils	This 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.
DateUtils	A utility class for parsing and formatting HTTP dates as used in cookies and other headers.
DeadObjectException	The object you are calling has died, because its hosting process no longer exists.
Debug	Provides various debugging functions for Android applications, including tracing and allocation counts.
Debug.InstructionCount	API for gathering and querying instruction counts.
Debug.MemoryInfo	This class is used to retrieved various statistics about the memory mappings for this process.
DebugUtils	Various utilities for debugging and logging.
DecelerateInterpolator	An interpolator where the rate of change starts out quickly and and then decelerates.
DecimalFormat	A concrete subclass of NumberFormat that formats decimal numbers.
DecimalFormatSymbols	Encapsulates the set of symbols (such as the decimal separator, the grouping separator, and so on) needed by `DecimalFormat` to format numbers.
DeclHandler	SAX2 extension handler for DTD declaration events.
DefaultClientConnection	Default implementation of an operated client connection.
DefaultClientConnectionOperator	Default implementation of a ClientConnectionOperator.
DefaultConnectionKeepAliveStrategy	Default implementation of a strategy deciding duration that a connection can remain idle.
DefaultConnectionReuseStrategy	Default implementation of a strategy deciding about connection re-use.
DefaultedHttpContext	HttpContext implementation that delegates resolution of an attribute to the given default HttpContext instance if the attribute is not present in the local one.
DefaultedHttpParams	HttpParams implementation that delegates resolution of a parameter to the given default HttpParams instance if the parameter is not present in the local one.
DefaultHandler	Default base class for SAX2 event handlers.
DefaultHandler2	This class extends the SAX2 base handler class to support the SAX2 LexicalHandler, DeclHandler, and EntityResolver2 extensions.
DefaultHttpClient	Default implementation of an HTTP client.
DefaultHttpClientConnection	Default implementation of a client-side HTTP connection.
DefaultHttpRequestFactory	Default implementation of a factory for creating request objects.
DefaultHttpRequestRetryHandler	The default HttpRequestRetryHandler used by request executors.
DefaultHttpResponseFactory	Default implementation of a factory for creating response objects.
DefaultHttpRoutePlanner	Default implementation of an HttpRoutePlanner.
DefaultHttpServerConnection	Default implementation of a server-side HTTP connection.
DefaultProxyAuthenticationHandler
DefaultRedirectHandler	Default implementation of RedirectHandler.
DefaultRequestDirector	Default implementation of RequestDirector.
DefaultResponseParser
DefaultTargetAuthenticationHandler
DefaultUserTokenHandler
Deflater	This class compresses data using the DEFLATE algorithm (see specification).
DeflaterOutputStream	This class provides an implementation of `FilterOutputStream` that compresses data using the DEFLATE algorithm.
Delayed	A 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.
Deprecated	Annotation type used to mark program elements that should no longer be used by programmers.
DESedeKeySpec	The key specification for a triple-DES (DES-EDE) key.
DESKeySpec	The key specification for a DES key.
Destroyable	Allows for special treatment of sensitive information, when it comes to destroying or clearing of the data.
DestroyFailedException	Signals that the destroy() method failed.
DexClassLoader	Provides a simple ClassLoader implementation that operates on a list of jar/apk files with classes.dex entries.
DexFile	Manipulates DEX files.
DhcpInfo	A simple object for retrieving the results of a DHCP request.
DHGenParameterSpec	The algorithm parameter specification for generating Diffie-Hellman parameters used in Diffie-Hellman key agreement.
DHKey	The interface for a Diffie-Hellman key.
DHParameterSpec	The algorithm parameter specification for the Diffie-Hellman algorithm.
DHPrivateKey	The interface for a private key in the Diffie-Hellman key exchange protocol.
DHPrivateKeySpec	The key specification for a Diffie-Hellman private key.
DHPublicKey	The interface for a public key in the Diffie-Hellman key exchange protocol.
DHPublicKeySpec	The key specification for a Diffie-Hellman public key.
DialerFilter
DialerKeyListener	For dialing-only text entry
Dialog	Base class for Dialogs.
DialogInterface
DialogInterface.OnCancelListener	Interface used to allow the creator of a dialog to run some code when the dialog is canceled.
DialogInterface.OnClickListener	Interface used to allow the creator of a dialog to run some code when an item on the dialog is clicked..
DialogInterface.OnDismissListener	Interface used to allow the creator of a dialog to run some code when the dialog is dismissed.
DialogInterface.OnKeyListener	Interface definition for a callback to be invoked when a key event is dispatched to this dialog.
DialogInterface.OnMultiChoiceClickListener	Interface used to allow the creator of a dialog to run some code when an item in a multi-choice dialog is clicked.
DialogPreference	A base class for Preference objects that are dialog-based.
Dictionary<K, V>	Note: Do not use this class since it is obsolete.
DigestException	`DigestException` is a general message digest exception.
DigestInputStream	`DigestInputStream` is a `FilterInputStream` which maintains an associated message digest.
DigestOutputStream	`DigestOutputStream` is a `FilterOutputStream` which maintains an associated message digest.
DigestScheme	Digest authentication scheme as defined in RFC 2617.
DigestSchemeFactory
DigitalClock	Like AnalogClock, but digital.
DigitsKeyListener	For digits-only text entry
DiscretePathEffect
Display
DisplayMetrics	A structure describing general information about a display, such as its size, density, and font scaling.
Document	The `Document` interface represents the entire HTML or XML document.
DocumentBuilder	Defines a bridge from XML sources (files, stream etc.) to DOM trees.
DocumentBuilderFactory	Provides a factory for DocumentBuilder instances.
Documented	Defines a meta-annotation for indicating that an annotation is documented and considered part of the public API.
DocumentFragment	`DocumentFragment` 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.
DocumentType	Each `Document` has a `doctype` attribute whose value is either `null` or a `DocumentType` object.
DomainCombiner	`DomainCombiner` is used to update and optimize `ProtectionDomain`s from an `AccessControlContext`.
DOMException	DOM 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).
DOMImplementation	The `DOMImplementation` interface provides a number of methods for performing operations that are independent of any particular instance of the document object model.
Double	The wrapper for the primitive type `double`.
DoubleBuffer	A buffer of doubles.
DownloadListener
Drawable	A 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.Callback	Implement this interface if you want to create an animated drawable that extends Drawable.
Drawable.ConstantState
DrawableContainer
DrawableContainer.DrawableContainerState
DrawableMarginSpan
DrawFilter	A DrawFilter subclass can be installed in a Canvas.
Driver	An interface to a JDBC driver.
Driver	SAX2 Driver that pulls events from XmlPullParser and comverts them into SAX2 callbacks.
DriverManager	Provides facilities for managing JDBC drivers.
DriverPropertyInfo	A class holding information about driver properties of a database connection.
DSAKey	The base interface for Digital Signature Algorithm (DSA) public or private keys.
DSAKeyPairGenerator	The interface for key generators that can generate DSA key pairs.
DSAParameterSpec	The parameter specification used with the Digital Signature Algorithm (DSA).
DSAParams	The interface for Digital Signature Algorithm (DSA) specific parameters.
DSAPrivateKey	The interface for a Digital Signature Algorithm (DSA) private key.
DSAPrivateKeySpec	The parameters specifying a DSA private key.
DSAPublicKey	The interface for a Digital Signature Algorithm (DSA) public key.
DSAPublicKeySpec	The parameters specifying a DSA public key.
DTDHandler	Receive notification of basic DTD-related events.
DuplicateFormatFlagsException	The unchecked exception will be thrown out if there are duplicate flags given out in the format specifier.
DynamicDrawableSpan
DynamicLayout	DynamicLayout is a text layout that updates itself as the text is edited.

E

ECField	The base interface for a Finite Field of an Elliptic Curve.
ECFieldF2m	The parameters specifying a characteristic 2 finite field of an elliptic curve.
ECFieldFp	The parameters specifying a prime finite field of an elliptic curve.
ECGenParameterSpec	The parameter specification used to generate elliptic curve domain parameters.
ECKey	The base interface for Elliptic Curve (EC) public or private keys.
ECParameterSpec	The parameter specification used with Elliptic Curve Cryptography (ECC).
ECPoint	A Point on an Elliptic Curve in barycentric (or affine) coordinates.
ECPrivateKey	The interface for an Elliptic Curve (EC) private key.
ECPrivateKeySpec	The parameters specifying an Elliptic Curve (EC) private key.
ECPublicKey	The interface for an Elliptic Curve (EC) public key.
ECPublicKeySpec	The parameters specifying an Elliptic Curve (EC) public key.
Editable	This is the interface for text whose content and markup can be changed (as opposed to immutable text like Strings).
Editable.Factory	Factory used by TextView to create new Editables.
EditorInfo	An 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.
EditText	EditText is a thin veneer over TextView that configures itself to be editable.
EditTextPreference	A Preference that allows for string input.
EGL
EGL10
EGL11
EGLConfig
EGLContext
EGLDisplay
EGLSurface
Element	An XML element.
Element	The `Element` interface represents an element in an HTML or XML document.
ElementListener	Listens for the beginning and ending of elements.
ElementType	Defines an enumeration for Java program elements.
EllipticCurve	An Elliptic Curve with its necessary values.
EmbossMaskFilter
EmptyStackException	An `EmptyStackException` is thrown if the pop/peek method of a stack is executed on an empty stack.
EncodedKeySpec	The abstract key specification for a public or a private key in encoded format.
EncodingUtils	The home for utility methods that handle various encoding tasks.
EncryptedPrivateKeyInfo	This class implements the `EncryptedPrivateKeyInfo` ASN.1 type as specified in PKCS #8 - Private-Key Information Syntax Standard.
EndElementListener	Listens for the end of elements.
EndTextElementListener	Listens for the end of text elements.
EnglishReasonPhraseCatalog	English reason phrases for HTTP status codes.
Entity	This interface represents an entity, either parsed or unparsed, in an XML document.
EntityDeserializer	Default implementation of an entity deserializer.
EntityEnclosingRequestWrapper	A wrapper class for HttpEntityEnclosingRequests that can be used to change properties of the current request without modifying the original object.
EntityReference	`EntityReference` objects may be inserted into the structure model when an entity reference is in the source document, or when the user wishes to insert an entity reference.
EntityResolver	Basic interface for resolving entities.
EntityResolver2	Extended interface for mapping external entity references to input sources, or providing a missing external subset.
EntitySerializer	Default implementation of an entity serializer.
EntityTemplate	Entity that delegates the process of content generation to an abstract content producer.
EntityUtils	Static helpers for dealing with entities.
Enum<E extends Enum<E>>	The superclass of all enumerated types.
EnumConstantNotPresentException	Thrown if an `enum` constant does not exist for a particular name.
Enumeration<E>	An Enumeration is used to sequence over a collection of objects.
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.
Environment	Provides access to environment variables.
EOFException	Thrown when a program encounters the end of a file or stream during an input operation.
EofSensorInputStream	A stream wrapper that triggers actions on close() and EOF.
EofSensorWatcher	A watcher for EofSensorInputStream.
Error	`Error` is the superclass of all classes that represent unrecoverable errors.
ErrorHandler	Basic interface for SAX error handlers.
ErrorManager	An error reporting facility for Handler implementations to record any error that may happen during logging.
EventListener	EventListener is the superclass of all event listener interfaces.
EventListenerProxy	This abstract class provides a simple wrapper for objects of type `EventListener`.
EventLogTags	Parsed representation of /etc/event-log-tags.
EventLogTags.Description
EventObject	`EventObject`s represent events.
Exception	`Exception` is the superclass of all classes that represent recoverable exceptions.
ExceptionInInitializerError	Thrown when an exception occurs during class initialization.
ExceptionUtils	The home for utility methods that handle various exception-related tasks.
Exchanger<V>	A synchronization point at which two threads can exchange objects.
ExecutionContext	Context attribute names for protocol execution.
ExecutionException	Exception thrown when attempting to retrieve the result of a task that aborted by throwing an exception.
Executor	An object that executes submitted Runnable tasks.
ExecutorCompletionService<V>	A CompletionService that uses a supplied Executor to execute tasks.
Executors	Factory and utility methods for Executor, ExecutorService, ScheduledExecutorService, ThreadFactory, and Callable classes defined in this package.
ExecutorService	An Executor that provides methods to manage termination and methods that can produce a Future for tracking progress of one or more asynchronous tasks.
ExemptionMechanism	This class implements the functionality of an exemption mechanism such as key recovery, key weakening, or key escrow.
ExemptionMechanismException	This is the base class for `ExemptionMechanismException`.
ExemptionMechanismSpi	The Service Provider Interface (SPI) definition for the `ExemptionMechanism` class.
ExpandableListActivity	An 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.
ExpandableListAdapter	An adapter that links a ExpandableListView with the underlying data.
ExpandableListView	A view that shows items in a vertically scrolling two-level list.
ExpandableListView.ExpandableListContextMenuInfo	Extra 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.OnChildClickListener	Interface definition for a callback to be invoked when a child in this expandable list has been clicked.
ExpandableListView.OnGroupClickListener	Interface definition for a callback to be invoked when a group in this expandable list has been clicked.
ExpandableListView.OnGroupCollapseListener	Used for being notified when a group is collapsed
ExpandableListView.OnGroupExpandListener	Used for being notified when a group is expanded
Externalizable	Defines an interface for classes that want to be serializable, but have their own binary representation.
ExtractEditText	Specialization of EditText for showing and interacting with the extracted text in a full-screen input method.
ExtractedText	Information about text that has been extracted for use by an input method.
ExtractedTextRequest	Description of what an input method would like from an application when extract text from its input editor.

F

FaceDetector	Identifies the faces of people in a Bitmap graphic object.
FaceDetector.Face	A Face contains all the information identifying the location of a face in a bitmap.
FactoryConfigurationError	Represents an error that occurred during the configuration of parser factory.
Field	This class represents a field.
FieldPosition	Identifies fields in formatted strings.
File	An "abstract" representation of a file system entity identified by a pathname.
FileChannel	An abstract channel type for interaction with a platform file.
FileChannel.MapMode	`MapMode` defines file mapping mode constants.
FileDescriptor	The lowest-level representation of a file, device, or socket.
FileEntity	An entity whose content is retrieved from a file.
FileFilter	An interface for filtering File objects based on their names or other information.
FileHandler	A `FileHandler` writes logging records into a specified file or a rotating set of files.
FileInputStream	A specialized InputStream that reads from a file in the file system.
FileLock	A `FileLock` represents a locked region of a file.
FileLockInterruptionException	A `FileLockInterruptionException` is thrown when a thread is interrupted while waiting to acquire a file lock.
FilenameFilter	An interface for filtering File objects based on their names or the directory they reside in.
FileNameMap	Defines a scheme for mapping a filename type to a MIME content type.
FileNotFoundException	Thrown when a file specified by a program cannot be found.
FileObserver
FileOutputStream	A specialized OutputStream that writes to a file in the file system.
FilePermission	A permission for accessing a file or directory.
FileReader	A specialized Reader that reads from a file in the file system.
FileWriter	A specialized Writer that writes to a file in the file system.
Filter	A filter constrains data with a filtering pattern.
Filter	A `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.
FilterInputStream	Wraps an existing InputStream and performs some transformation on the input data while it is being read.
FilterOutputStream	Wraps an existing OutputStream and performs some transformation on the output data while it is being written.
FilterQueryProvider	This class can be used by external clients of CursorAdapter and CursorTreeAdapter to define how the content of the adapter should be filtered.
FilterReader	Wraps an existing Reader and performs some transformation on the input data while it is being read.
FilterWriter	Wraps an existing Writer and performs some transformation on the output data while it is being written.
FlakyTest	This annotation can be used on an InstrumentationTestCase's test methods.
Float	The wrapper for the primitive type `float`.
FloatBuffer	A buffer of floats.
FloatMath	Math routines similar to those found in Math.
Flushable	Defines 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.
FocusFinder	The algorithm used for finding the next focusable view in a given direction from a view that currently has focus.
ForegroundColorSpan
Format	The base class for all formats.
Format.Field	Inner class used to represent `Format` attributes in the `AttributedCharacterIterator` that the `formatToCharacterIterator()` method returns in `Format` subclasses.
FormatFlagsConversionMismatchException	A `FormatFlagsConversionMismatchException` will be thrown if a conversion and the flags are incompatible.
Formattable	Classes that handle custom formatting for the 's' specifier of `Formatter` should implement the `Formattable` interface.
FormattableFlags	FormattableFlags are used as a parameter to formatTo(Formatter, int, int, int) and change the output format in `Formattable`s.
FormattedHeader	An HTTP header which is already formatted.
Formatter	Utility class to aid in formatting common values that are not covered by the standard java.util.Formatter.
Formatter	The `Formatter` class is a String-formatting utility that is designed to work like the `printf` function of the C programming language.
Formatter	`Formatter` objects are used to format LogRecord objects into a string representation.
Formatter.BigDecimalLayoutForm	The enumeration giving the available styles for formatting very large decimal numbers.
FormatterClosedException	A `FormatterClosedException` will be thrown if the formatter has been closed.
FrameLayout	FrameLayout is designed to block out an area on the screen to display a single item.
FrameLayout.LayoutParams	Per-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

Gallery	A view that shows items in a center-locked, horizontally scrolling list.
Gallery.LayoutParams	Gallery extends LayoutParams to provide a place to hold current Transformation information along with previous position/transformation info.
GatheringByteChannel	The interface for channels that can write a set of buffers in a single operation.
GeneralSecurityException	`GeneralSecurityException` is a general security exception and the superclass for all security specific exceptions.
GenericArrayType	This interface represents an array type with a component type that is either a parameterized type or a type variable.
GenericDeclaration	Common interface for language constructs that declare type parameters.
GenericSignatureFormatError	Indicates that a malformed signature has been encountered via a reflective method.
Geocoder	A class for handling geocoding and reverse geocoding.
GeomagneticField	This 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.
GestureDetector	Detects various gestures and events using the supplied MotionEvents.
GestureDetector.OnDoubleTapListener	The listener that is used to notify when a double-tap or a confirmed single-tap occur.
GestureDetector.OnGestureListener	The listener that is used to notify when gestures occur.
GestureDetector.SimpleOnGestureListener	A convenience class to extend when you only want to listen for a subset of all the gestures.
GetChars	Please 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
GLDebugHelper	A helper class for debugging OpenGL ES applications.
GLException	An exception class for OpenGL errors.
GLSurfaceView	An implementation of SurfaceView that uses the dedicated surface for displaying OpenGL rendering.
GLSurfaceView.EGLConfigChooser	An interface for choosing an EGLConfig configuration from a list of potential configurations.
GLSurfaceView.GLWrapper	An interface used to wrap a GL interface.
GLSurfaceView.Renderer	A generic renderer interface.
GLU	A set of GL utilities inspired by the OpenGL Utility Toolkit.
GLUtils	Utility class to help bridging OpenGL ES and Android APIs.
GpsSatellite	This class represents the current state of a GPS satellite.
GpsStatus	This class represents the current state of the GPS engine.
GpsStatus.Listener	Used for receiving notifications when GPS status has changed.
GradientDrawable	A Drawable with a color gradient for buttons, backgrounds, etc.
GradientDrawable.Orientation	Controls how the gradient is oriented relative to the drawable's bounds
Gravity	Standard constants and tools for placing an object within a potentially larger container.
GregorianCalendar	`GregorianCalendar` is a concrete subclass of Calendar and provides the standard calendar used by most of the world.
GridLayoutAnimationController	A layout animation controller is used to animated a grid layout's children.
GridLayoutAnimationController.AnimationParameters	The set of parameters that has to be attached to each view contained in the view group animated by the grid layout animation controller.
GridView	A view that shows items in two-dimensional scrolling grid.
Group	A `Principal` that represents a group of principals.
GsmCellLocation	Represents the cell location on a GSM phone.
Guard	`Guard` implementors protect access to other objects.
GuardedObject	`GuardedObject` controls access to an object, by checking all requests for the object with a `Guard`.
GZIPInputStream	The `GZIPInputStream` class is used to read data stored in the GZIP format, reading and decompressing GZIP data from the underlying stream into its buffer.
GZIPOutputStream	The `GZIPOutputStream` class is used to write data to a stream in the GZIP storage format.

H

Handler	A Handler allows you to send and process Message and Runnable objects associated with a thread's MessageQueue.
Handler	A `Handler` object accepts a logging request and exports the desired messages to a target, for example, a file, the console, etc.
Handler.Callback	Callback 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.
HandlerThread	Handy class for starting a new thread that has a looper.
HandshakeCompletedEvent	The event object encapsulating the information about a completed SSL handshake on a SSL connection.
HandshakeCompletedListener	The listener to be implemented to receive event notifications on completion of SSL handshake on an SSL connection.
HapticFeedbackConstants	Constants 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 associates keys with values.
Header	Represents an HTTP header field.
HeaderElement	One element of an HTTP header value.
HeaderElementIterator	A type-safe iterator for HeaderElement objects.
HeaderGroup	A class for combining a set of headers.
HeaderIterator	A type-safe iterator for Header objects.
HeaderValueFormatter	Interface for formatting elements of a header value.
HeaderValueParser	Interface for parsing header values into elements.
HeaderViewListAdapter	ListAdapter used when a ListView has header views.
HideReturnsTransformationMethod	This transformation method causes any carriage return characters (\r) to be hidden by displaying them as zero-width non-breaking space characters (?).
HorizontalScrollView	Layout container for a view hierarchy that can be scrolled by the user, allowing it to be larger than the physical display.
HostNameResolver
HostnameVerifier	The interface to be used to provide hostname verification functionality.
Html	This class processes HTML strings into displayable styled text.
Html.ImageGetter	Retrieves images for HTML <img> tags.
Html.TagHandler	Is notified when HTML tags are encountered that the parser does not know how to interpret.
HTTP	Constants and static helpers related to the HTTP protocol.
HttpAbstractParamBean
HttpAuthHandler	HTTP authentication handler: local handler that takes care of HTTP authentication requests.
HttpClient	Interface for an HTTP client.
HttpClientConnection	An HTTP connection for use on the client side.
HttpClientParams	An adaptor for accessing HTTP client parameters in HttpParams.
HttpConnection	A generic HTTP connection, useful on client and server side.
HttpConnectionMetrics	The point of access to the statistics of an HttpConnection.
HttpConnectionMetricsImpl	Implementation of the metrics interface.
HttpConnectionParamBean
HttpConnectionParams	An adaptor for accessing connection parameters in HttpParams.
HttpContext	A context for executing a request.
HttpDateGenerator	Generates a date in the format required by the HTTP protocol.
HttpDelete	HTTP 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.
HttpEntity	An entity that can be sent or received with an HTTP message.
HttpEntityEnclosingRequest	A request with an entity.
HttpEntityEnclosingRequestBase	Basic implementation of an HTTP request that can be modified.
HttpEntityWrapper	Base class for wrapping entities.
HttpException	Signals that an HTTP exception has occurred.
HttpExpectationVerifier	Defines an interface to verify whether an incoming HTTP request meets the target server's expectations.
HttpGet	HTTP GET method.
HttpHead	HTTP HEAD method.
HttpHost	Holds all of the variables needed to describe an HTTP connection to a host.
HttpHostConnectException	A ConnectException that specifies the HttpHost that was being connected to.
HttpInetConnection	An HTTP connection over the Internet Protocol (IP).
HttpMessage	A generic HTTP message.
HttpMessageParser	Generic message parser interface.
HttpMessageWriter	Generic message writer interface.
HttpOptions	HTTP OPTIONS method.
HttpParams	Represents a collection of HTTP protocol and framework parameters.
HttpPost	HTTP POST method.
HttpProcessor	Performs interceptor processing of requests and responses.
HttpProtocolParamBean
HttpProtocolParams	This class implements an adaptor around the HttpParams interface to simplify manipulation of the HTTP protocol specific parameters.
HttpPut	HTTP PUT method.
HttpRequest	An HTTP request.
HttpRequestBase	Basic implementation of an HTTP request that can be modified.
HttpRequestExecutor	Sends HTTP requests and receives the responses.
HttpRequestFactory	A factory for HttpRequest objects.
HttpRequestHandler
HttpRequestHandlerRegistry	Maintains a map of HTTP request handlers keyed by a request URI pattern.
HttpRequestHandlerResolver	Interface to be implemented by objects that can resolve HttpRequestHandler instances by request URI.
HttpRequestInterceptor	Processes a request.
HttpRequestInterceptorList	Provides access to an ordered list of request interceptors.
HttpRequestParser
HttpRequestRetryHandler	A handler for determining if an HttpRequest should be retried after a recoverable exception during execution.
HttpRequestWriter
HttpResponse	An HTTP response.
HttpResponseException	Signals a non 2xx HTTP response.
HttpResponseFactory	A factory for HttpResponse objects.
HttpResponseInterceptor	Processes a response.
HttpResponseInterceptorList	Provides access to an ordered list of response interceptors.
HttpResponseParser
HttpResponseWriter
HttpRetryException	If a HTTP request has to be retried, this exception will be thrown if the request cannot be retried automatically.
HttpRoute	The route for a request.
HttpRouteDirector	Provides directions on establishing a route.
HttpRoutePlanner	Encapsulates logic to compute a HttpRoute to a target host.
HttpServerConnection	An HTTP connection for use on the server side.
HttpService	Minimalistic server-side implementation of an HTTP processor.
HttpStatus	Constants enumerating the HTTP status codes.
HttpsURLConnection	This abstract subclass of `HttpURLConnection` defines methods for managing HTTPS connections according to the description given by RFC 2818.
HttpTrace	HTTP TRACE method.
HttpTransportMetrics
HttpTransportMetricsImpl	Default implementation of HttpTransportMetrics.
HttpUriRequest	Extended version of the HttpRequest interface that provides convenience methods to access request properties such as request URI and method type.
HttpURLConnection	This abstract subclass of `URLConnection` defines methods for managing HTTP connection according to the description given by RFC 2068.
HttpVersion	Represents an HTTP version, as specified in RFC 2616.

I

IBinder	Base 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.DeathRecipient	Interface 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.
IdentityInputStream	A stream for reading from a session input buffer.
IdentityOutputStream	A 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.
IdleConnectionHandler	A helper class for connection managers to track idle connections.
IInterface	Base class for Binder interfaces.
IllegalAccessError	Thrown when the virtual machine notices that a program tries access a field which is not accessible from where it is referenced.
IllegalAccessException	Thrown when a program attempts to access a field or method which is not accessible from the location where the reference is made.
IllegalArgumentException	Thrown when a method is invoked with an argument which it can not reasonably deal with.
IllegalBlockingModeException	An `IllegalBlockingModeException` is thrown when an operation that requires a specific blocking mode is invoked on a channel that is in a different blocking mode.
IllegalBlockSizeException	The exception, that is thrown when the data length provided to a block cipher does not match the block size of the cipher.
IllegalCharsetNameException	An `IllegalCharsetNameException` is thrown when an illegal charset name is encountered.
IllegalFormatCodePointException	An `IllegalFormatCodePointException` will be thrown if an invalid Unicode code point (defined by isValidCodePoint(int)) is passed as a parameter to a Formatter.
IllegalFormatConversionException	An `IllegalFormatConversionException` will be thrown when the parameter is incompatible with the corresponding format specifier.
IllegalFormatException	An `IllegalFormatException` is thrown when a format string that contains either an illegal syntax or format specifier is transferred as a parameter.
IllegalFormatFlagsException	An `IllegalFormatFlagsException` will be thrown if the combination of the format flags is illegal.
IllegalFormatPrecisionException	An `IllegalFormatPrecisionException` will be thrown if the precision is a negative other than -1 or in other cases where precision is not supported.
IllegalFormatWidthException	An `IllegalFormatWidthException` will be thrown if the width is a negative value other than -1 or in other cases where a width is not supported.
IllegalMonitorStateException	Thrown 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.
IllegalSelectorException	An `IllegalSelectorException` is thrown when a call is made to register a channel on a selector that has been created by a different provider.
IllegalStateException	Thrown when an action is attempted at a time when the virtual machine is not in the correct state.
IllegalThreadStateException	Thrown when an operation is attempted which is not possible given the state that the executing thread is in.
ImageButton	An image button displays an image that can be pressed, or clicked, by the user.
ImageSpan
ImageSwitcher
ImageView	Displays an arbitrary image, such as an icon.
ImageView.ScaleType	Options for scaling the bounds of an image to the bounds of this view.
IncompatibleClassChangeError	`IncompatibleClassChangeError` is the superclass of all classes which represent errors that occur when inconsistent class files are loaded into the same running image.
IncompleteAnnotationException	Indicates that an element of an annotation type was accessed that was added after the type was compiled or serialized.
IndexedPropertyChangeEvent	A type of PropertyChangeEvent that indicates that an indexed property has changed.
IndexOutOfBoundsException	Thrown when a program attempts to access a value in an indexable collection using a value which is outside of the range of valid indices.
Inet4Address	This class represents a 32 bit long IPv4 address.
Inet6Address	This class represents a 128 bit long IPv6 address.
InetAddress	The Internet Protocol (IP) address representation class.
InetAddressUtils	A collection of utilities relating to InetAddresses.
InetSocketAddress	This class represents a socket endpoint described by a IP address and a port number.
InflateException	This exception is thrown by an inflater on error conditions.
Inflater	This class uncompresses data that was compressed using the DEFLATE algorithm (see specification).
InflaterInputStream	This class provides an implementation of `FilterInputStream` that uncompresses data that was compressed using the DEFLATE algorithm (see specification).
InheritableThreadLocal<T>	A thread-local variable whose value is passed from parent to child thread.
Inherited	Defines a meta-annotation for indicating that an annotation is automatically inherited.
InputBinding	Information given to an InputMethod about a client connecting to it.
InputConnection	The 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.
InputFilter	InputFilters can be attached to Editables to constrain the changes that can be made to them.
InputFilter.AllCaps	This filter will capitalize all the lower case letters that are added through edits.
InputFilter.LengthFilter	This filter will constrain edits not to make the length of the text greater than the specified length.
InputMethod	The 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
InputMethodInfo	This class is used to specify meta information of an input method.
InputMethodManager	Central system API to the overall input method framework (IMF) architecture, which arbitrates interaction between applications and the current input method.
InputMethodService	InputMethodService provides a standard implementation of an InputMethod, which final implementations can derive from and customize.
InputMethodService.InputMethodImpl	Concrete implementation of AbstractInputMethodService.AbstractInputMethodImpl that provides all of the standard behavior for an input method.
InputMethodService.InputMethodSessionImpl	Concrete implementation of AbstractInputMethodService.AbstractInputMethodSessionImpl that provides all of the standard behavior for an input method session.
InputMethodService.Insets	Information about where interesting parts of the input method UI appear.
InputMethodSession	The InputMethodSession interface provides the per-client functionality of InputMethod that is safe to expose to applications.
InputMethodSession.EventCallback
InputMismatchException	An `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.
InputSource	A single input source for an XML entity.
InputStream	The base class for all input streams.
InputStreamEntity	A streamed entity obtaining content from an InputStream.
InputStreamReader	A class for turning a byte stream into a character stream.
InputType	Bit definitions for an integer defining the basic content type of text held in an Editable object.
InsetDrawable	A Drawable that insets another Drawable by a specified distance.
InstantiationError	Thrown 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.
InstantiationException	Thrown when a program attempts to access a constructor which is not accessible from the location where the reference is made.
Instrumentation	Base class for implementing application instrumentation code.
Instrumentation.ActivityMonitor	Information about a particular kind of Intent that is being monitored.
Instrumentation.ActivityResult	Description of a Activity execution result to return to the original activity.
InstrumentationInfo	Information you can retrieve about a particular piece of test instrumentation.
InstrumentationTestCase	A test case that has access to Instrumentation.
InstrumentationTestRunner	An Instrumentation that runs various types of TestCases against an Android package (application).
InstrumentationTestSuite	A TestSuite that injects Instrumentation into InstrumentationTestCase before running them.
IntBuffer	A buffer of ints.
Integer	The wrapper for the primitive type `int`.
Intent	An intent is an abstract description of an operation to be performed.
Intent.FilterComparison	Wrapper class holding an Intent and implementing comparisons on it for the purpose of filtering.
Intent.ShortcutIconResource	Represents a shortcut/live folder icon resource.
IntentFilter	Structured description of Intent values to be matched.
IntentFilter.AuthorityEntry	This is an entry for a single authority in the Iterator returned by authoritiesIterator().
IntentFilter.MalformedMimeTypeException	This exception is thrown when a given MIME type does not have a valid syntax.
IntentService	An abstract Service that serializes the handling of the Intents passed upon service start and handles them on a handler thread.
InternalError	Thrown when the virtual machine notices that it has gotten into an undefined state.
Interpolator
Interpolator	An interpolator defines the rate of change of an animation.
Interpolator.Result
InterruptedException	Thrown when a waiting thread is activated before the condition it was waiting for has been satisfied.
InterruptedIOException	Signals that a blocking I/O operation has been interrupted.
InterruptibleChannel	Channels that implement this interface can be asynchronously closed and interrupted.
InvalidAlgorithmParameterException	`InvalidAlgorithmParameterException` indicates the occurrence of invalid algorithm parameters.
InvalidClassException	Signals a problem during the serialization or or deserialization of an object.
InvalidCredentialsException	Authentication credentials required to respond to a authentication challenge are invalid
InvalidKeyException	`InvalidKeyException` indicates exceptional conditions, caused by an invalid key.
InvalidKeySpecException	The exception that is thrown when an invalid key specification is encountered.
InvalidMarkException	An `InvalidMarkException` is thrown when `reset()` is called on a buffer, but no mark has been set previously.
InvalidObjectException	Signals that, during deserialization, the validation of an object has failed.
InvalidParameterException	`InvalidParameterException` indicates exceptional conditions, caused by invalid parameters.
InvalidParameterSpecException	The exception that is thrown when an invalid parameter specification is encountered.
InvalidPreferencesFormatException	An 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`).
InvalidPropertiesFormatException	An `InvalidPropertiesFormatException` is thrown if loading the XML document defining the properties does not follow the `Properties` specification.
InvocationHandler	Implementors of this interface dispatch methods invoked on proxy instances.
InvocationTargetException	This class provides a wrapper for an exception thrown by a `Method` or `Constructor` invocation.
IOException	Signals a general, I/O-related error.
IPackageInstallObserver	API for installation callbacks from the Package Manager.
IPackageInstallObserver.Stub	Local-side IPC implementation stub class.
IsolatedContext	A 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>	Objects of classes that implement this interface can be used within a `foreach` statement.
Iterator<E>	An Iterator is used to sequence over a collection of objects.
IvParameterSpec	The algorithm parameter specification for an initialization vector.

J

JarEntry	Represents a single file in a JAR archive together with the manifest attributes and digital signatures associated with it.
JarException	This runtime exception is thrown when a problem occurs while reading a JAR file.
JarFile	`JarFile` is used to read jar entries and their associated data from jar files.
JarInputStream	The input stream from which the JAR file to be read may be fetched.
JarOutputStream	The `JarOutputStream` is used to write data in the `JarFile` format to an arbitrary output stream
JarURLConnection	This class establishes a connection to a `jar:` URL using the `JAR` protocol.
JetPlayer	JetPlayer provides access to JET content playback and control.
JetPlayer.OnJetEventListener	Handles the notification when the JET engine generates an event.
JSONArray	A JSONArray is an ordered sequence of values.
JSONException	The JSONException is thrown by the JSON.org classes then things are amiss.
JSONObject	A JSONObject is an unordered collection of name/value pairs.
JSONStringer	JSONStringer provides a quick and convenient way of producing JSON text.
JSONTokener	A JSONTokener takes a source string and extracts characters and tokens from it.
JsPromptResult	Public class for handling javascript prompt requests.
JsResult

K

Key	`Key` is the common interface for all keys.
KeyAgreement	This class provides the functionality for a key exchange protocol.
KeyAgreementSpi	The Service Provider Interface (SPI) definition for the `KeyAgreement` class.
Keyboard	Loads an XML description of a keyboard and stores the attributes of the keys.
Keyboard.Key	Class for describing the position and characteristics of a single key in the keyboard.
Keyboard.Row	Container for keys in the keyboard.
KeyboardView	A view that renders a virtual Keyboard.
KeyboardView.OnKeyboardActionListener	Listener for virtual keyboard events.
KeyCharacterMap
KeyCharacterMap.KeyData
KeyEvent	Contains constants for key events.
KeyEvent.Callback
KeyException	`KeyException` is the common superclass of all key related exceptions.
KeyFactory	`KeyFactory` 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.
KeyFactorySpi	`KeyFactorySpi` is the Service Provider Interface (SPI) definition for KeyFactory.
KeyGenerator	This class provides the public API for generating symmetric cryptographic keys.
KeyGeneratorSpi	The Service Provider Interface (SPI) definition for the `KeyGenerator` class.
KeyguardManager	Class that can be used to lock and unlock the keyboard.
KeyguardManager.KeyguardLock	Handle returned by newKeyguardLock(String) that allows you to disable / reenable the keyguard.
KeyguardManager.OnKeyguardExitResult	Callback passed to exitKeyguardSecurely(KeyguardManager.OnKeyguardExitResult) to notify caller of result.
KeyListener	Interface for converting text key events into edit operations on an Editable class.
KeyManagementException	`KeyManagementException` is a general exception, thrown to indicate an exception during processing an operation concerning key management.
KeyManager	This is the interface to implement in order to mark a class as a JSSE key managers so that key managers can be easily grouped.
KeyManagerFactory	The public API for `KeyManagerFactory` implementations.
KeyManagerFactorySpi	The Service Provider Interface (SPI) for the `KeyManagerFactory` class.
KeyPair	`KeyPair` is a container for a public key and a private key.
KeyPairGenerator	`KeyPairGenerator` is an engine class which is capable of generating a private key and its related public key utilizing the algorithm it was initialized with.
KeyPairGeneratorSpi	`KeyPairGeneratorSpi` is the Service Provider Interface (SPI) definition for KeyPairGenerator.
KeyRep	`KeyRep` is a standardized representation for serialized Key objects.
KeyRep.Type	`Type` enumerates the supported key types.
KeySpec	The marker interface for key specifications.
KeyStore	`KeyStore` is responsible for maintaining cryptographic keys and their owners.
KeyStore.Builder	`Builder` is used to construct new instances of `KeyStore`.
KeyStore.CallbackHandlerProtection	`CallbackHandlerProtection` is a `ProtectionParameter` that encapsulates a CallbackHandler.
KeyStore.Entry	`Entry` is the common marker interface for a `KeyStore` entry.
KeyStore.LoadStoreParameter	`LoadStoreParameter` represents a parameter that specifies how a `KeyStore` can be loaded and stored.
KeyStore.PasswordProtection	`PasswordProtection` is a `ProtectionParameter` that protects a `KeyStore` using a password.
KeyStore.PrivateKeyEntry	`PrivateKeyEntry` represents a `KeyStore` entry that holds a private key.
KeyStore.ProtectionParameter	`ProtectionParameter` is a marker interface for protection parameters.
KeyStore.SecretKeyEntry	`SecretKeyEntry` represents a `KeyStore` entry that holds a secret key.
KeyStore.TrustedCertificateEntry	`TrustedCertificateEntry` represents a `KeyStore` entry that holds a trusted certificate.
KeyStoreBuilderParameters	The parameters for `KeyManager`s.
KeyStoreException	`KeyStoreException` is a general `KeyStore` exception.
KeyStoreSpi	`KeyStoreSpi` is the Service Provider Interface (SPI) definition for KeyStore.

L

LangUtils	A set of utility methods to help produce consistent equals and hashCode methods.
LargeTest	Marks a test that should run as part of the large tests.
LastOwnerException	The exception that is thrown when an attempt is made to remove the the last `Owner` from an `Owner`.
LauncherActivity	Displays a list of all activities which can be performed for a given intent.
LauncherActivity.IconResizer	Utility class to resize icons to match default icon size.
LauncherActivity.ListItem	An item in the list
LaxContentLengthStrategy	The lax implementation of the content length strategy.
LayerDrawable	A Drawable that manages an array of other Drawables.
LayeredSocketFactory	A SocketFactory for layered sockets (SSL/TLS).
LayerRasterizer
Layout	A base class that manages text layout in visual elements on the screen.
Layout.Alignment
Layout.Directions	Stores information about bidirectional (left-to-right or right-to-left) text within the layout of a line.
LayoutAnimationController	A layout animation controller is used to animated a layout's, or a view group's, children.
LayoutAnimationController.AnimationParameters	The set of parameters that has to be attached to each view contained in the view group animated by the layout animation controller.
LayoutInflater	This class is used to instantiate layout XML file into its corresponding View objects.
LayoutInflater.Factory
LayoutInflater.Filter	Hook to allow clients of the LayoutInflater to restrict the set of Views that are allowed to be inflated.
LDAPCertStoreParameters	The parameters to initialize a LDAP `CertStore` instance.
LeadingMarginSpan
LeadingMarginSpan.Standard
Level	`Level` objects are used to indicate the level of logging.
LevelListDrawable	A resource that manages a number of alternate Drawables, each assigned a maximum numerical value.
LexicalHandler	SAX2 extension handler for lexical events.
LightingColorFilter
LinearGradient
LinearInterpolator	An interpolator where the rate of change is constant
LinearLayout	A Layout that arranges its children in a single column or a single row.
LinearLayout.LayoutParams	Per-child layout information associated with ViewLinearLayout.
LineBackgroundSpan
LineFormatter	Interface for formatting elements of the HEAD section of an HTTP message.
LineHeightSpan
LineNumberInputStream	This class is deprecated. Use LineNumberReader
LineNumberReader	Wraps an existing Reader and counts the line terminators encountered while reading the data.
LineParser	Interface for parsing lines in the HEAD section of an HTTP message.
LinkageError	`LinkageError` is the superclass of all error classes that occur when loading and linking class files.
LinkedBlockingQueue<E>	An optionally-bounded blocking queue based on linked nodes.
LinkedHashMap<K, V>	LinkedHashMap is a variant of HashMap.
LinkedHashSet<E>	LinkedHashSet is a variant of HashSet.
LinkedList<E>	LinkedList is an implementation of List, backed by a linked list.
Linkify	Linkify take a piece of text and a regular expression and turns all of the regex matches in the text into clickable links.
Linkify.MatchFilter	MatchFilter enables client code to have more control over what is allowed to match and become a link, and what is not.
Linkify.TransformFilter	TransformFilter 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.
ListActivity	An 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.
ListAdapter	Extended 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.
ListPreference	A Preference that displays a list of entries as a dialog.
ListResourceBundle	`ListResourceBundle` is the abstract superclass of classes which provide resources by implementing the `getContents()` method to return the list of resources.
ListView	A view that shows items in a vertically scrolling list.
ListView.FixedViewInfo	A 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.
LocalActivityManager	Helper class for managing multiple running embedded activities in the same process.
Locale	`Locale` represents a language/country/variant combination.
LocalServerSocket	non-standard class for creating inbound UNIX-domain socket on the Android platform, this is created in the Linux non-filesystem namespace.
LocalSocket	Creates a (non-server) socket in the UNIX-domain namespace.
LocalSocketAddress	A UNIX-domain (AF_LOCAL) socket address.
LocalSocketAddress.Namespace	The namespace that this address exists in.
Location	A class representing a geographic location sensed at a particular time (a "fix").
LocationListener	Used for receiving notifications from the LocationManager when the location has changed.
LocationManager	This class provides access to the system location services.
LocationProvider	An abstract superclass for location providers.
Locator	Interface for associating a SAX event with a document location.
Locator2	SAX2 extension to augment the entity information provided though a Locator.
Locator2Impl	SAX2 extension helper for holding additional Entity information, implementing the Locator2 interface.
LocatorImpl	Provide an optional convenience implementation of Locator.
Lock	`Lock` implementations provide more extensive locking operations than can be obtained using `synchronized` methods and statements.
LockSupport	Basic thread blocking primitives for creating locks and other synchronization classes.
Log	API for sending log output.
Logger	Loggers are used to log records to certain outputs, including file, console, etc.
LoggingMXBean	`LoggingMXBean` is the management interface for the logging sub-system.
LoggingPermission	The permission required to control the logging when run with a `SecurityManager`.
LoggingSessionInputBuffer	Logs all data read to the wire LOG.
LoggingSessionOutputBuffer	Logs all data written to the wire LOG.
LoginException	Base class for exceptions that are thrown when a login error occurs.
LoginFilter	Abstract class for filtering login-related text (user names and passwords)
LoginFilter.PasswordFilterGMail	This filter is compatible with GMail passwords which restricts characters to the Latin-1 (ISO8859-1) char set.
LoginFilter.UsernameFilterGeneric	This filter rejects characters in the user name that are not compatible with Google login.
LoginFilter.UsernameFilterGMail	This filter rejects characters in the user name that are not compatible with GMail account creation.
LogManager	`LogManager` is used to maintain configuration properties of the logging framework, and to manage a hierarchical namespace of all named `Logger` objects.
LogPrinter	Implementation of a Printer that sends its output to the system log.
LogRecord	A `LogRecord` object represents a logging request.
Long	The wrapper for the primitive type `long`.
LongBuffer	A buffer of longs.
Looper	Class used to run a message loop for a thread.

M

Mac	This class provides the public API for Message Authentication Code (MAC) algorithms.
MacSpi	The Service-Provider Interface (SPI) definition for the `Mac` class.
MailTo	MailTo URL parser This class parses a mailto scheme URL and then can be queried for the parsed parameters.
MalformedChallengeException	Signals that authentication challenge is in some way invalid or illegal in the given context
MalformedChunkCodingException	Signals a malformed chunked stream.
MalformedCookieException	Signals that a cookie is in some way invalid or illegal in a given context
MalformedInputException	A `MalformedInputException` is thrown when a malformed input is encountered, for example if a byte sequence is illegal for the given charset.
MalformedParameterizedTypeException	Indicates that a malformed parameterized type has been encountered by a reflective method.
MalformedURLException	This exception is thrown when a program attempts to create an URL from an incorrect specification.
ManagedClientConnection	A client-side connection with advanced connection logic.
ManagerFactoryParameters	The marker interface for key manager factory parameters.
Manifest
Manifest	The `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`.
MappedByteBuffer	`MappedByteBuffer` is a special kind of direct byte buffer which maps a region of file to memory.
MaskFilter	MaskFilter is the base class for object that perform transformations on an alpha-channel mask before drawing it.
MaskFilterSpan
Matcher	Provides a means of matching regular expressions against a given input, finding occurrences of regular expressions in a given input, or replacing parts of a given input.
MatchResult	Holds the results of a successful match of a Pattern against a given string.
Math	Class Math provides basic math constants and operations such as trigonometric functions, hyperbolic functions, exponential, logarithms, etc.
MathContext	Immutable objects describing settings such as rounding mode and digit precision for the numerical operations provided by class BigDecimal.
Matrix	The Matrix class holds a 3x3 matrix for transforming coordinates.
Matrix	Matrix math utilities.
Matrix.ScaleToFit	Controlls how the src rect should align into the dst rect for setRectToRect().
MatrixCursor	A mutable cursor implementation backed by an array of `Object`s.
MatrixCursor.RowBuilder	Builds a row, starting from the left-most column and adding one column value at a time.
MediaController	A view containing controls for a MediaPlayer.
MediaController.MediaPlayerControl
MediaPlayer	MediaPlayer class can be used to control playback of audio/video files and streams.
MediaPlayer.OnBufferingUpdateListener	Interface definition of a callback to be invoked indicating buffering status of a media resource being streamed over the network.
MediaPlayer.OnCompletionListener	Interface definition for a callback to be invoked when playback of a media source has completed.
MediaPlayer.OnErrorListener	Interface 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.OnInfoListener	Interface definition of a callback to be invoked to communicate some info and/or warning about the media or its playback.
MediaPlayer.OnPreparedListener	Interface definition for a callback to be invoked when the media source is ready for playback.
MediaPlayer.OnSeekCompleteListener	Interface definition of a callback to be invoked indicating the completion of a seek operation.
MediaPlayer.OnVideoSizeChangedListener	Interface definition of a callback to be invoked when the video size is first known or updated
MediaRecorder	Used to record audio and video.
MediaRecorder.AudioEncoder	Defines the audio encoding.
MediaRecorder.AudioSource	Defines the audio source.
MediaRecorder.OnErrorListener	Interface definition for a callback to be invoked when an error occurs while recording.
MediaRecorder.OnInfoListener	Interface definition for a callback to be invoked when an error occurs while recording.
MediaRecorder.OutputFormat	Defines the output format.
MediaRecorder.VideoEncoder	Defines the video encoding.
MediaRecorder.VideoSource	Defines the video source.
MediaScannerConnection	MediaScannerConnection provides a way for applications to pass a newly created or downloaded media file to the media scanner service.
MediaScannerConnection.MediaScannerConnectionClient	An 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.
MediaStore	The Media provider contains meta data for all available media on both internal and external storage devices.
MediaStore.Audio	Container for all audio content.
MediaStore.Audio.AlbumColumns	Columns representing an album
MediaStore.Audio.Albums	Contains artists for audio files
MediaStore.Audio.ArtistColumns	Columns representing an artist
MediaStore.Audio.Artists	Contains artists for audio files
MediaStore.Audio.Artists.Albums	Sub-directory of each artist containing all albums on which a song by the artist appears.
MediaStore.Audio.AudioColumns	Columns for audio file that show up in multiple tables.
MediaStore.Audio.Genres	Contains all genres for audio files
MediaStore.Audio.Genres.Members	Sub-directory of each genre containing all members.
MediaStore.Audio.GenresColumns	Columns representing an audio genre
MediaStore.Audio.Media
MediaStore.Audio.Playlists	Contains playlists for audio files
MediaStore.Audio.Playlists.Members	Sub-directory of each playlist containing all members.
MediaStore.Audio.PlaylistsColumns	Columns representing a playlist
MediaStore.Images	Contains meta data for all available images.
MediaStore.Images.ImageColumns
MediaStore.Images.Media
MediaStore.Images.Thumbnails
MediaStore.MediaColumns	Common fields for most MediaProvider tables
MediaStore.Video
MediaStore.Video.Media
MediaStore.Video.VideoColumns
MediumTest	Marks a test that should run as part of the medium tests.
Member	Common interface providing access to reflective information on class members.
MemoryFile	MemoryFile is a wrapper for the Linux ashmem driver.
MemoryHandler	A `Handler` put the description of log events into a cycled memory buffer.
Menu	Interface for managing the items in a menu.
MenuInflater	This class is used to instantiate menu XML files into Menu objects.
MenuItem	Interface for direct access to a previously created menu item.
MenuItem.OnMenuItemClickListener	Interface definition for a callback to be invoked when a menu item is clicked.
MergeCursor	A convience class that lets you present an array of Cursors as a single linear Cursor.
Message	Defines a message containing a description and arbitrary data object that can be sent to a Handler.
MessageDigest	`MessageDigest` is an engine class which is capable of generating one way hash values for arbitrary input, utilizing the algorithm it was initialized with.
MessageDigestSpi	`MessageDigestSpi` is the Service Provider Interface (SPI) definition for MessageDigest.
MessageFormat	Produces concatenated messages in language-neutral way.
MessageFormat.Field	The instances of this inner class are used as attribute keys in `AttributedCharacterIterator` that the formatToCharacterIterator(Object) method returns.
MessageQueue	Low-level class holding the list of messages to be dispatched by a Looper.
MessageQueue.IdleHandler	Callback interface for discovering when a thread is going to block waiting for more messages.
Messenger	Reference to a Handler, which others can use to send messages to it.
MetaKeyKeyListener	This base class encapsulates the behavior for handling the meta keys (shift and alt) and the pseudo-meta state of selecting text.
Method	This class represents a method.
MethodNotSupportedException	Indicates that an HTTP method is not supported.
MetricAffectingSpan	The classes that affect character-level text formatting in a way that changes the width or height of characters extend this class.
MGF1ParameterSpec	The parameter specification for the Mask Generation Function (MGF1) in the RSA-PSS Signature and OAEP Padding scheme.
MimeTypeMap	Two-way map that maps MIME-types to file extensions and vice versa.
MissingFormatArgumentException	A `MissingFormatArgumentException` will be thrown if there is no corresponding argument with the specified conversion or an argument index that refers to a missing argument.
MissingFormatWidthException	A `MissingFormatWidthException` will be thrown if the format width is missing but is required.
MissingResourceException	A `MissingResourceException` is thrown by ResourceBundle when a resource bundle cannot be found or a resource is missing from a resource bundle.
MockApplication	A mock Application class.
MockContentResolver	A mock ContentResolver class that isolates the test code from the real content system.
MockContext	A mock Context class.
MockDialogInterface	A mock DialogInterface class.
MockPackageManager	A mock PackageManager class.
MockResources	A mock Resources class.
Modifier	This class provides static methods to decode class and member modifiers.
MonthDisplayHelper	Helps answer common questions that come up when displaying a month in a 6 row calendar grid format.
MoreAsserts	Contains additional assertion methods not found in JUnit.
MotionEvent	Object used to report movement (mouse, pen, finger, trackball) events.
MovementMethod
Movie
MultiAutoCompleteTextView	An 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.CommaTokenizer	This simple Tokenizer can be used for lists where the items are separated by a comma and one or more spaces.
MultiAutoCompleteTextView.Tokenizer
MulticastSocket	This class implements a multicast socket for sending and receiving IP multicast datagram packets.
MultihomePlainSocketFactory	Socket factory that implements a simple multi-home fail-over on connect failure, provided the same hostname resolves to multiple InetAddresses.
MultiTapKeyListener	This is the standard key listener for alphabetic input on 12-key keyboards.
MutableContextWrapper	Special version of ContextWrapper that allows the base context to be modified after it is initially set.

N

NamedNodeMap	Objects implementing the `NamedNodeMap` interface are used to represent collections of nodes that can be accessed by name.
NamespaceSupport	Encapsulate Namespace logic for use by applications using SAX, or internally by SAX drivers.
NameValuePair	A simple class encapsulating an attribute/value pair.
NegativeArraySizeException	Thrown when an attempt is made to create an array with a size of less than zero.
NeighboringCellInfo	Represents the neighboring cell information, including Received Signal Strength and Cell ID location.
NetPermission	This class represents permissions to configure the access to network resources.
NetscapeDomainHandler
NetscapeDraftHeaderParser
NetscapeDraftSpec	Netscape cookie draft compliant cookie policy
NetscapeDraftSpecFactory
NetworkInfo	Describes the status of a network interface of a given type (currently either Mobile or Wifi).
NetworkInfo.DetailedState	The fine-grained state of a network connection.
NetworkInfo.State	Coarse-grained network state.
NetworkInterface	This class is used to represent a network interface of the local device.
NinePatch	The NinePatch class permits drawing a bitmap in nine sections.
NinePatchDrawable	A resizeable bitmap, with stretchable areas that you define.
NoClassDefFoundError	Thrown when the virtual machine is unable to locate a class which it has been asked to load.
NoConnectionPendingException	A `NoConnectionPendingException` is thrown if `SocketChannel`'s finishConnect method is called before the `SocketChannel`'s connect method completed without error.
NoConnectionReuseStrategy	A strategy that never re-uses a connection.
NoCopySpan	This 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.Concrete	Convenience equivalent for when you would just want a new Object() for a span but want it to be no-copy.
Node	The `Node` interface is the primary datatype for the entire Document Object Model.
NodeChangeEvent	This is the event class to indicate that one child of the preference node has been added or deleted.
NodeChangeListener	This interface is used to handle preference node change events.
NodeList	The `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.
NonReadableChannelException	A `NonReadableChannelException` is thrown when attempting to read from a channel that is not open for reading.
NonRepeatableRequestException	Signals failure to retry the request due to non-repeatable request entity.
NonWritableChannelException	A `NonWritableChannelException` is thrown when attempting to write to a channel that is not open for writing.
NoRouteToHostException	The `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.
NoSuchAlgorithmException	`NoSuchAlgorithmException` indicates that a requested algorithm could not be found.
NoSuchElementException	A `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.
NoSuchFieldError	Thrown when the virtual machine notices that a program tries to reference, on a class or object, a field that does not exist.
NoSuchFieldException	Thrown when the virtual machine notices that a program tries to reference, on a class or object, a field that does not exist.
NoSuchMethodError	Thrown when the virtual machine notices that a program tries to reference, on a class or object, a method that does not exist.
NoSuchMethodException	Thrown when the virtual machine notices that a program tries to reference, on a class or object, a method that does not exist.
NoSuchPaddingException	The exception that is thrown when the requested padding mechanism is not supported.
NoSuchProviderException	`NoSuchProviderException` indicates that a requested security provider could not be found.
NotActiveException	Signals that a serialization-related method has been invoked in the wrong place.
Notation	This interface represents a notation declared in the DTD.
Notification	A class that represents how a persistent notification is to be presented to the user using the NotificationManager.
NotificationManager	Class to notify the user of events that happen. This is how you tell the user that something has happened in the background.
NotOwnerException	The 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.
NotSerializableException	Signals that an object that is not serializable has been passed into the `ObjectOutput.writeObject()` mthod.
NotYetBoundException	A `NotYetBoundException` is thrown if the server socket channel is not bound before an I/O operation is made.
NotYetConnectedException	A `NotYetConnectedException` is thrown if the socket channel is not connected before an I/O operation is invoked.
NTCredentials	Credentials specific to the Windows platform.
NTLMEngine	Abstract NTLM authentication engine.
NTLMEngineException	Signals NTLM protocol failure.
NTLMScheme
NTUserPrincipal	NT (MS Windows specific) user principal used for HTTP authentication
NullCipher	This class provides an identity cipher that does not transform the input data in any way.
NullPointerException	Thrown 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`.
Number	The abstract superclass of the classes which represent numeric base types (that is Byte, Short, Integer, Long, Float, and Double.
NumberFormat	The abstract base class for all number formats.
NumberFormat.Field	The instances of this inner class are used as attribute keys and values in `AttributedCharacterIterator` that the formatToCharacterIterator(Object) method returns.
NumberFormatException	Thrown when an invalid value is passed to a string-to-number conversion method.
NumberKeyListener	For numeric text entry
NumericShaper	The Class NumericShaper provides methods to convert latin character codes to unicode character codes.

O

OAEPParameterSpec	The algorithm parameter specification for the OAEP Padding algorithm.
Object	The root class of the Java class hierarchy.
ObjectInput	Defines an interface for classes that allow reading serialized objects.
ObjectInputStream	A specialized InputStream that is able to read (deserialize) Java objects as well as primitive data types (int, byte, char etc.).
ObjectInputStream.GetField	GetField is an inner class that provides access to the persistent fields read from the source stream.
ObjectInputValidation	A callback interface for post-deserialization checks on objects.
ObjectOutput	Defines an interface for classes that allow reading serialized objects.
ObjectOutputStream	A specialized OutputStream that is able to write (serialize) Java objects as well as primitive data types (int, byte, char etc.).
ObjectOutputStream.PutField	PutField is an inner class to provide access to the persistent fields that are written to the target stream.
ObjectStreamClass	Represents a descriptor for identifying a class during serialization and deserialization.
ObjectStreamConstants	A helper interface with constants used by the serialization implementation.
ObjectStreamException	Signals some sort of problem during either serialization or deserialization of objects.
ObjectStreamField	Describes a field for the purpose of serialization.
Observable<T>	Provides methods for (un)registering arbitrary observers in an ArrayList.
Observable	Observable is used to notify a group of Observer objects when a change occurs.
Observer	`Observer` is the interface to be implemented by objects that receive notification of updates on an `Observable` object.
Opcodes	This is a list of Dalvik opcodes.
OpenableColumns	These are standard columns for openable URIs.
OperatedClientConnection	A client-side connection that relies on outside logic to connect sockets to the appropriate hosts.
OptionalDataException	Signals that the ObjectInputStream class encountered a primitive type (`int`, `char` etc.) instead of an object instance in the input stream.
OrientationEventListener	Helper 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.
OutOfMemoryError	Thrown when a request for memory is made that can not be satisfied using the available platform resources.
OutputStream	The base class for all output streams.
OutputStreamWriter	A class for turning a character stream into a byte stream.
OvalShape	Defines an oval shape.
OverlappingFileLockException	An `OverlappingFileLockException` is thrown when attempting to acquire a lock that overlaps an existing or pending lock held by this process.
Override	Annotation type used to mark methods that override a method declaration in a superclass.
Owner	The interface to manage owners of objects that require ownership.

P

Pack200	Class factory for Pack200.Packer and Pack200.Unpacker.
Pack200.Packer	The interface defining the API for converting a JAR file to an output stream in the Pack200 format.
Pack200.Unpacker	The interface defining the API for converting a packed stream in the Pack200 format to a JAR file.
Package	Contains information about a Java package.
PackageInfo	Overall information about the contents of a package.
PackageItemInfo	Base class containing information common to all package items held by the package manager.
PackageItemInfo.DisplayNameComparator
PackageManager	Class for retrieving various kinds of information related to the application packages that are currently installed on the device.
PackageManager.NameNotFoundException	This exception is thrown when a given package, application, or component name can not be found.
PackageStats	implementation of PackageStats associated with a application package.
Paint	The Paint class holds the style and color information about how to draw geometries, text and bitmaps.
Paint.Align	Align specifies how drawText aligns its text relative to the [x,y] coordinates.
Paint.Cap	The Cap specifies the treatment for the beginning and ending of stroked lines and paths.
Paint.FontMetrics	Class that describes the various metrics for a font at a given text size.
Paint.FontMetricsInt	Convenience method for callers that want to have FontMetrics values as integers.
Paint.Join	The Join specifies the treatment where lines and curve segments join on a stroked path.
Paint.Style	The Style specifies if the primitive being drawn is filled, stroked, or both (in the same color).
PaintDrawable	Drawable that draws its bounds in the given paint, with optional rounded corners.
PaintFlagsDrawFilter
ParagraphStyle	The classes that affect paragraph-level text formatting implement this interface.
ParameterizedType	This interface represents a parameterized type such as `'Set<String>'`.
ParameterMetaData	An interface used to get information about the types and properties of parameters in a `PreparedStatement`.
Parcel	Container for a message (data and object references) that can be sent through an IBinder.
Parcelable	Interface 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.
ParcelableSpan	A special kind of Parcelable for objects that will serve as text spans.
ParcelFileDescriptor	The FileDescriptor returned by readFileDescriptor(), allowing you to close it when done with it.
ParcelFileDescriptor.AutoCloseInputStream	An InputStream you can create on a ParcelFileDescriptor, which will take care of calling ParcelFileDescritor.close() for you when the stream is closed.
ParcelFileDescriptor.AutoCloseOutputStream	An OutputStream you can create on a ParcelFileDescriptor, which will take care of calling ParcelFileDescritor.close() for you when the stream is closed.
ParcelFormatException	The contents of a Parcel (usually during unmarshalling) does not contain the expected data.
ParseException	When WebAddress Parser Fails, this exception is thrown
ParseException	Thrown when the string being parsed is not in the correct form.
ParseException	Indicates a parse error.
ParsePosition	Tracks 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.
ParserAdapter	Adapt a SAX1 Parser as a SAX2 XMLReader.
ParserConfigurationException	Represents an exception that occurred during the configuration of parser.
ParserCursor	This 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.
PasswordAuthentication	This immutable class is a data structure that encapsulates username and password which is used by the `Authenticator` class.
PasswordCallback	Is used in conjunction with a CallbackHandler to retrieve a password when needed.
PasswordTransformationMethod
Path	The Path class encapsulates compound (multiple contour) geometric paths consisting of straight line segments, quadratic curves, and cubic curves.
Path.Direction	Specifies how closed shapes (e.g.
Path.FillType	Enum for the ways a path may be filled
PathClassLoader	Provides 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
PathEffect	PathEffect 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
PathShape	Creates geometric paths, utilizing the Path class.
Pattern	Represents a pattern used for matching, searching, or replacing strings.
PatternMatcher	A 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.
PatternSyntaxException	Encapsulates a syntax error that occurred during the compilation of a Pattern.
PBEKey	The interface to a password-based-encryption key.
PBEKeySpec	The key specification for a password based encryption key.
PBEParameterSpec	The algorithm parameter specification for a password based encryption algorithm.
PendingIntent	A description of an Intent and target action to perform with it.
PendingIntent.CanceledException	Exception thrown when trying to send through a PendingIntent that has been canceled or is otherwise no longer able to execute the request.
PendingIntent.OnFinished	Callback interface for discovering when a send operation has completed.
PerformanceTestCase	More complex interface performance for test cases.
PerformanceTestCase.Intermediates	Callbacks for PerformanceTestCase.
Permission	`Permission` is the common base class of all permissions that participate in the access control security framework around AccessController and AccessControlContext.
Permission	The interface that represents a permission.
PermissionCollection	`PermissionCollection` 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.
PermissionGroupInfo	Information you can retrieve about a particular security permission group known to the system.
PermissionInfo	Information you can retrieve about a particular security permission known to the system.
Permissions	`Permissions` 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.
PhoneNumberFormattingTextWatcher	Watches a TextView and if a phone number is entered will format it using formatNumber(Editable, int).
PhoneNumberUtils	Various utilities for dealing with phone number strings.
PhoneStateListener	A listener class for monitoring changes in specific telephony states on the device, including service state, signal strength, message waiting indicator (voicemail), and others.
Picture	A picture records drawing calls (via the canvas returned by beginRecording) and can then play them back (via picture.draw(canvas) or canvas.drawPicture).
PictureDrawable	Drawable subclass that wraps a Picture, allowing the picture to be used whereever a Drawable is supported.
Pipe	A pipe contains two channels.
Pipe.SinkChannel	Writable sink channel used to write to a pipe.
Pipe.SourceChannel	Readable source channel used to read from a pipe.
PipedInputStream	Receives information from a communications pipe.
PipedOutputStream	Places information on a communications pipe.
PipedReader	Receives information on a communications pipe.
PipedWriter	Places information on a communications pipe.
PixelFormat
PixelXorXfermode	PixelXorXfermode implements a simple pixel xor (op ^ src ^ dst).
PKCS8EncodedKeySpec	The key specification for an encoded private key in ASN.1 format as defined in the PKCS#8 standard.
PKIXBuilderParameters	The parameter specification for a PKIX `CertPathBuilder` algorithm used to build certificate chains validated with the PKIX certification path validation.
PKIXCertPathBuilderResult	The result of the PKIX certification path builder, returned by build(CertPathParameters).
PKIXCertPathChecker	The class specifying the interface to extend the certification path validation algorithm by checks to perform on an `X509Certificate`.
PKIXCertPathValidatorResult	The implementation of the result of the PKIX certification path validation.
PKIXParameters	This class implements the parameters for the `PKIX CertPathValidator`.
PlainSocketFactory	The default class for creating sockets.
Plugin	Represents a plugin (Java equivalent of the PluginPackageAndroid C++ class in libs/WebKitLib/WebKit/WebCore/plugins/android/)
Plugin.PreferencesClickHandler
PluginData	This class encapsulates the content generated by a plugin.
PluginList	A simple list of initialized plugins.
Point	Point holds two integer coordinates
PointF	PointF holds two float coordinates
Policy	`Policy` is the common super type of classes which represent a system security policy.
PolicyNode	The interface to a valid policy tree node for the PKIX certification path validation algorithm.
PolicyQualifierInfo	This class implements a policy qualifier as defined by the ASN.1 `PolicyQualifierInfo` structure.
PooledConnection	An interface which provides facilities for handling connections to a database which are pooled.
PoolEntryRequest	Encapsulates a request for a BasicPoolEntry.
PopupWindow	A popup window that can be used to display an arbitrary view.
PopupWindow.OnDismissListener	Listener that is called when this popup window is dismissed.
PorterDuff
PorterDuff.Mode
PorterDuffColorFilter
PorterDuffXfermode
PortUnreachableException	This `PortUnreachableException` will be thrown if an `ICMP_Port_Unreachable` message has been received.
PotentialDeadlockError	Is thrown when the VM identifies a potential deadlock.
PowerManager	This class gives you control of the power state of the device.
PowerManager.WakeLock	Class lets you say that you need to have the device on.
Preference	Represents the basic Preference UI building block displayed by a PreferenceActivity in the form of a ListView.
Preference.BaseSavedState	A base class for managing the instance state of a Preference.
Preference.OnPreferenceChangeListener	Interface 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.OnPreferenceClickListener	Interface definition for a callback to be invoked when a Preference is clicked.
PreferenceActivity	Shows a hierarchy of Preference objects as lists, possibly spanning multiple screens.
PreferenceCategory	Used to group Preference objects and provide a disabled title above the group.
PreferenceChangeEvent	This is the event class to indicate that a preference has been added, deleted or updated.
PreferenceChangeListener	This interface is used to handle preferences change events.
PreferenceGroup	A container for multiple Preference objects.
PreferenceManager	Used to help create Preference hierarchies from activities or XML.
PreferenceManager.OnActivityDestroyListener	Interface definition for a class that will be called when the container's activity is destroyed.
PreferenceManager.OnActivityResultListener	Interface definition for a class that will be called when the container's activity receives an activity result.
PreferenceManager.OnActivityStopListener	Interface definition for a class that will be called when the container's activity is stopped.
Preferences	An 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.
PreferenceScreen	Represents a top-level Preference that is the root of a Preference hierarchy.
PreferencesFactory	This interface is used by the Preferences class as factory class to create `Preferences` instances.
PreparedStatement	An interface for a precompiled SQL Statement.
Principal	`Principal`s are objects which have identities.
Printer	Simple interface for printing text, allowing redirection to various targets.
PrintStream	Wraps an existing OutputStream and provides convenience methods for writing common data types in a human readable format.
PrintStreamPrinter	Implementation of a Printer that sends its output to a PrintStream.
PrintWriter	Wraps either an existing OutputStream or an existing Writer and provides convenience methods for printing common data types in a human readable format.
PrintWriterPrinter	Implementation 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.
PrivateCredentialPermission	Protects private credential objects belonging to a `Subject`.
PrivateKey	`PrivateKey` is the common interface for private keys.
PrivilegedAction<T>	`PrivilegedAction` represents an action that can be executed privileged regarding access control.
PrivilegedActionException	`PrivilegedActionException` wraps exceptions which are thrown from within privileged operations.
PrivilegedExceptionAction<T>	`PrivilegedAction` represents an action, that can be executed privileged regarding access control.
Process	Tools for managing OS processes.
Process	Represents an external process.
ProcessBuilder	Creates operating system processes.
ProcessingInstruction	The `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.
Properties	A `Properties` object is a `Hashtable` where the keys and values must be `String`s.
PropertyChangeEvent	An event that indicates that a constraint or a boundary of a property has changed.
PropertyChangeListener	A PropertyChangeListener can subscribe with a event source.
PropertyChangeListenerProxy	The implementation of this listener proxy just delegates the received events to its listener.
PropertyChangeSupport	This utility class
PropertyPermission	`PropertyPermission` objects represent a permission to access system properties.
PropertyResourceBundle	`PropertyResourceBundle` loads resources from an `InputStream`.
Protectable	A Protectable can be run and can throw a Throwable.
ProtectionDomain	`ProtectionDomain` represents all permissions that are granted to a specific code source.
ProtocolException	Signals 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.
ProtocolException	Signals that an HTTP protocol violation has occurred.
ProtocolVersion	Represents a protocol version, as specified in RFC 2616.
Provider	`Provider` is the abstract superclass for all security providers in the Java security infrastructure.
Provider.Service	`Service` represents a service in the Java Security infrastructure.
ProviderException	`ProviderException` is a general exception, thrown by security `Providers`.
ProviderInfo	Holds 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 TestCase class provides a framework for isolated testing of a single ContentProvider.
Proxy	A convenience class for accessing the user and default proxy settings.
Proxy	`Proxy` defines methods for creating dynamic proxy classes and instances.
Proxy	This class represents proxy server settings.
Proxy.Type	`Enum` class for the proxy type.
ProxySelector	Selects an applicable proxy server when connecting to a resource specified by a URL.
ProxySelectorRoutePlanner	Default implementation of an HttpRoutePlanner.
PSource	The source of the label `L` as specified in PKCS #1.
PSource.PSpecified	The explicit specification of the parameter `P` used in the source algorithm.
PSSParameterSpec	The parameter specification for the RSA-PSS Signature scheme.
PublicKey	`PublicKey` is the common interface for public keys.
PushbackInputStream	Wraps an existing InputStream and adds functionality to "push back" bytes that have been read, so that they can be read again.
PushbackReader	Wraps an existing Reader and adds functionality to "push back" characters that have been read, so that they can be read again.

Q

Queue<E>	This kind of collection provides advanced operations compared to basic collections, such as insertion, extraction, and inspection.
QuoteSpan
QwertyKeyListener	This 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.
Random	This class provides methods that generates pseudo-random numbers of different types, such as `int`, `long`, `double`, and `float`.
RandomAccess	RandomAccess is implemented by `List` implementations that support fast (usually constant time) random access.
RandomAccessFile	Allows reading from and writing to a file in a random-access manner.
Rasterizer
RasterizerSpan
RatingBar	A RatingBar is an extension of SeekBar and ProgressBar that shows a rating in stars.
RatingBar.OnRatingBarChangeListener	A callback that notifies clients when the rating has been changed.
RC2ParameterSpec	The algorithm parameter specification for the RC2 algorithm.
RC5ParameterSpec	The algorithm parameter specification for the RC5 algorithm.
Readable	Represents a sequence of characters that can be incrementally read (copied) into a CharBuffer.
ReadableByteChannel	A `ReadableByteChannel` is a type of Channel that can read bytes.
Reader	The base class for all readers.
ReadOnlyBufferException	A `ReadOnlyBufferException` is thrown when some write operation is called on a read-only buffer.
ReadWriteLock	A `ReadWriteLock` maintains a pair of associated locks, one for read-only operations and one for writing.
ReasonPhraseCatalog	Interface for obtaining reason phrases for HTTP status codes.
ReceiverCallNotAllowedException	This exception is thrown from registerReceiver(BroadcastReceiver, IntentFilter) and bindService(Intent, ServiceConnection, int) when these methods are being used from an BroadcastReceiver component.
RecognizerIntent	Constants for supporting speech recognition through starting an Intent
Rect	Rect holds four integer coordinates for a rectangle.
RectF	RectF holds four float coordinates for a rectangle.
RectShape	Defines a rectangle shape.
RedirectException	Signals violation of HTTP specification caused by an invalid redirect
RedirectHandler	A 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.
RedirectLocations	A collection of URIs that were used as redirects.
ReentrantLock	A 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.
ReentrantReadWriteLock	An implementation of ReadWriteLock supporting similar semantics to ReentrantLock.
ReentrantReadWriteLock.ReadLock	The lock returned by method readLock().
ReentrantReadWriteLock.WriteLock	The lock returned by method writeLock().
Ref	This 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.
ReflectPermission	A `ReflectPermission` object represents a permission to access operations in the reflection layer.
RefQueueHandler	Callback handler for RefQueueWorker.
RefQueueWorker	A worker thread for processing queued references.
Region
Region.Op
RegionIterator
RejectedExecutionException	Exception thrown by an Executor when a task cannot be accepted for execution.
RejectedExecutionHandler	A handler for tasks that cannot be executed by a ThreadPoolExecutor.
RelativeLayout	A Layout where the positions of the children can be described in relation to each other or to the parent.
RelativeLayout.LayoutParams	Per-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.
RemoteException	Parent exception for all Binder remote-invocation errors
RemoteViews	A class that describes a view hierarchy that can be displayed in another process.
RemoteViews.ActionException	Exception to send when something goes wrong executing an action
RemoteViews.RemoteView	This annotation indicates that a subclass of View is alllowed to be used with the RemoteViews mechanism.
RenamingDelegatingContext	This 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
ReplacementTransformationMethod	This transformation method causes the characters in the getOriginal() array to be replaced by the corresponding characters in the getReplacement() array.
RequestAddCookies	Request interceptor that matches cookies available in the current CookieStore to the request being executed and generates corresponding cookierequest headers.
RequestConnControl	A request interceptor that suggests connection keep-alive to the server.
RequestContent	A request interceptor that decides about the transport encoding.
RequestDate	A request interceptor that adds a Date header.
RequestDefaultHeaders	Request interceptor that adds default request headers.
RequestDirector	A client-side request director.
RequestExpectContinue	A request interceptor that enables the expect-continue handshake.
RequestLine	The first line of an HttpRequest.
RequestProxyAuthentication
RequestTargetAuthentication
RequestTargetHost	A request interceptor that sets the Host header for HTTP/1.1 requests.
RequestUserAgent	A request interceptor that adds a User-Agent header.
RequestWrapper	A wrapper class for HttpRequests that can be used to change properties of the current request without modifying the original object.
ResolveInfo	Information that is returned from resolving an intent against an IntentFilter.
ResolveInfo.DisplayNameComparator
ResourceBundle	`ResourceBundle` is an abstract class which is the superclass of classes which provide `Locale`-specific resources.
ResourceCursorAdapter	An easy adapter that creates views defined in an XML file.
ResourceCursorTreeAdapter	A fairly simple ExpandableListAdapter that creates views defined in an XML file.
Resources	Class for accessing an application's resources.
Resources.NotFoundException	This exception is thrown by the resource APIs when a requested resource can not be found.
Resources.Theme	This class holds the current attribute values for a particular theme.
ResponseCache	This class is an implementation of `URLConnection` caches intended primarily for the according stream handler implementations.
ResponseConnControl	A response interceptor that suggests connection keep-alive to the client.
ResponseContent	A response interceptor that sets up entity-related headers.
ResponseDate	A response interceptor that adds a Date header.
ResponseHandler<T>	Handler that encapsulates the process of generating a response object from a HttpResponse.
ResponseProcessCookies	Response interceptor that populates the current CookieStore with data contained in response cookies received in the given the HTTP response.
ResponseServer	A response interceptor that adds a Server header.
ResultReceiver	Generic interface for receiving a callback result from someone.
ResultSet	An interface for an object which represents a database table entry, returned as the result of the query to the database.
ResultSetMetaData	Provides information about the columns returned in a `ResultSet`.
Retention	Defines a meta-annotation for determining the scope of retention for an annotation.
RetentionPolicy	Defines an enumeration for annotation retention policies.
RFC2109DomainHandler
RFC2109Spec	RFC 2109 compliant cookie policy
RFC2109SpecFactory
RFC2109VersionHandler
RFC2617Scheme	Abstract 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.
Rfc822Token	This class stores an RFC 822-like name, address, and comment, and provides methods to convert them to quoted strings.
Rfc822Tokenizer	This 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.
Ringtone	Ringtone provides a quick method for playing a ringtone, notification, or other similar types of sounds.
RingtoneManager	RingtoneManager provides access to ringtones, notification, and other types of sounds.
RingtonePreference	A Preference that allows the user to choose a ringtone from those on the device.
RootElement	The root XML element.
RotateAnimation	An animation that controls the rotation of an object.
RotateDrawable	A Drawable that can rotate another Drawable based on the current level value.
RoundingMode	Specifies the rounding behavior for operations whose results cannot be represented exactly.
RoundRectShape	Creates a rounded-corner rectangle.
RoutedRequest	A request with the route along which it should be sent.
RouteInfo	Read-only interface for route information.
RouteInfo.LayerType	The layering type of a route.
RouteInfo.TunnelType	The tunnelling type of a route.
RouteSpecificPool	A connection sub-pool for a specific route, used by ConnPoolByRoute.
RouteTracker	Helps tracking the steps in establishing a route.
RowSet	An interface which provides means to access data which persists on a database.
RowSetEvent	An event which is sent when specific events happen to a RowSet object.
RowSetInternal	An 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`.
RowSetListener	An interface used to send notification of events occurring in the context of a RowSet.
RowSetMetaData	An interface which provides facilities for getting information about the columns in a `RowSet`.
RowSetReader	An interface which provides functionality for a disconnected `RowSet` to get data from a database into its rows.
RowSetWriter	An interface which provides functionality for a disconnected `RowSet` to put data updates back to the data source from which the `RowSet` was originally populated.
RSAKey	The base interface for PKCS#1 RSA public and private keys.
RSAKeyGenParameterSpec	The parameter specification for generating an RSA key pair.
RSAMultiPrimePrivateCrtKey	The interface for a Multi-Prime RSA private key.
RSAMultiPrimePrivateCrtKeySpec	The key specification of a RSA multi-prime private key with the Chinese Remainder Theorem (CRT) information values used.
RSAOtherPrimeInfo	The additional prime information specified as triplet of primes, a prime exponent, and a Chinese Remainder Theorem (CRT) coefficient.
RSAPrivateCrtKey	The interface for a PKCS#1 RSA private key using CRT information values.
RSAPrivateCrtKeySpec	The key specification of a RSA private key using Chinese Remainder Theorem (CRT) values.
RSAPrivateKey	The interface for an PKCS#1 RSA private key.
RSAPrivateKeySpec	The key specification of a RSA private key.
RSAPublicKey	The interface for a PKCS#1 RSA public key.
RSAPublicKeySpec	The key specification of a RSA public key.
RuleBasedCollator	A concrete implementation class for `Collation`.
Runnable	Represents a command that can be executed.
Runtime	Allows Java applications to interface with the environment in which they are running.
RuntimeException	`RuntimeException` is the superclass of all classes that represent exceptional conditions which occur as a result of executing an application in the virtual machine.
RuntimePermission	Represents the permission to execute a runtime-related function.

S

Savepoint	A savepoint is an instant during the current transaction that can be utilized by a rollback via the rollback() command.
SAXException	Encapsulate a general SAX error or warning.
SAXNotRecognizedException	Exception class for an unrecognized identifier.
SAXNotSupportedException	Exception class for an unsupported operation.
SAXParseException	Encapsulate an XML parse error or warning.
SAXParser	Provides a wrapper around a SAX XMLReader.
SAXParserFactory	Provides a factory for SAXParser instances.
ScaleAnimation	An animation that controls the scale of an object.
ScaleDrawable	A Drawable that changes the size of another Drawable based on its current level value.
ScaleXSpan
Scanner	A parser that parses a text string of primitive types and strings with the help of regular expressions.
ScanResult	Describes information about a detected access point.
ScatteringByteChannel	The interface for channels that can read data into a set of buffers in a single operation.
ScheduledExecutorService	An 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.
ScheduledThreadPoolExecutor	A ThreadPoolExecutor that can additionally schedule commands to run after a given delay, or to execute periodically.
Scheme	Encapsulates specifics of a protocol scheme such as "http" or "https".
SchemeRegistry	A set of supported protocol schemes.
Scroller	This class encapsulates scrolling.
ScrollingMovementMethod
ScrollView	Layout container for a view hierarchy that can be scrolled by the user, allowing it to be larger than the physical display.
SealedObject	A `SealedObject` is a wrapper around a `serializable` object instance and encrypts it using a cryptographic cipher.
SearchManager	This class provides access to the system search services.
SearchManager.OnCancelListener	See setOnCancelListener(SearchManager.OnCancelListener) for configuring your activity to monitor search UI state.
SearchManager.OnDismissListener	See setOnDismissListener(SearchManager.OnDismissListener) for configuring your activity to monitor search UI state.
SearchRecentSuggestions	This is a utility class providing access to SearchRecentSuggestionsProvider.
SearchRecentSuggestionsProvider	This superclass can be used to create a simple search suggestions provider for your application.
SecretKey	A cryptographic secret (symmetric) key.
SecretKeyFactory	The public API for `SecretKeyFactory` implementations.
SecretKeyFactorySpi	The Service Provider Interface (SPI) definition for the `SecretKeyFactory` class.
SecretKeySpec	A key specification for a `SecretKey` and also a secret key implementation that is provider-independent.
SectionIndexer	Interface that should be implemented on Adapters to enable fast scrolling in an AbsListView between sections of the list.
SecureCacheResponse	A secure cache response represents data which is originally retrieved over a secure connection.
SecureClassLoader	`SecureClassLoader` represents a `ClassLoader` which associates the classes it loads with a code source and provide mechanisms to allow the relevant permissions to be retrieved.
SecureRandom	`SecureRandom` is an engine class which is capable of generating cryptographically secure pseudo-random numbers.
SecureRandomSpi	`SecureRandomSpi` is the Service Provider Interface (SPI) definition for SecureRandom.
Security	`Security` is the central class in the Java Security API.
SecurityException	Thrown when a security manager check fails.
SecurityManager	Provides security verification facilities for applications.
SecurityPermission	`SecurityPermission` objects guard access to the mechanisms which implement security.
SeekBar	A SeekBar is an extension of ProgressBar that adds a draggable thumb.
SeekBar.OnSeekBarChangeListener	A callback that notifies clients when the progress level has been changed.
SelectableChannel	A channel that can be used with a Selector.
Selection	Utility class for manipulating cursors and selections in CharSequences.
SelectionKey	A `SelectionKey` represents the relationship between a channel and a selector for which the channel is registered.
Selector	A controller for the selection of SelectableChannel objects.
SelectorProvider	`SelectorProvider` is an abstract base class that declares methods for providing instances of DatagramChannel, Pipe, Selector , ServerSocketChannel, and SocketChannel.
Semaphore	A counting semaphore.
Sensor	Class representing a sensor.
SensorEvent	This class represents a sensor event and holds informations such as the sensor type (eg: accelerometer, orientation, etc...), the time-stamp, accuracy and of course the sensor's data.
SensorEventListener	Used for receiving notifications from the SensorManager when sensor values have changed.
SensorListener	Used for receiving notifications from the SensorManager when sensor values have changed.
SensorManager	Class that lets you access the device's sensors.
SequenceInputStream	Concatenates two or more existing InputStreams.
Serializable	An empty marker interface for classes that want to support serialization and deserialization based on the `ObjectOutputStream` and `ObjectInputStream` classes.
SerializableEntity
SerializablePermission	Is used to enable access to potentially unsafe serialization operations.
ServerSocket	This class represents a server-side socket that waits for incoming client connections.
ServerSocketChannel	A `ServerSocketChannel` is a partial abstraction of a selectable, stream-oriented listening socket.
ServerSocketFactory	This abstract class defines methods to create server sockets.
Service	A Service is an application component that runs in the background, not interacting with the user, for an indefinite period of time.
ServiceConnection	Interface for monitoring the state of an application service.
ServiceInfo	Information you can retrieve about a particular application service.
ServiceState	Contains 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.
SessionInputBuffer	Session input buffer for blocking connections.
SessionOutputBuffer	Session output buffer for blocking connections.
Set<E>	A `Set` is a data structure which does not allow duplicate elements.
SetCookie	This interface represents a `SetCookie` response header sent by the origin server to the HTTP agent in order to maintain a conversational state.
SetCookie2	This interface represents a `SetCookie2` response header sent by the origin server to the HTTP agent in order to maintain a conversational state.
Settings	The Settings provider contains global system-level device preferences.
Settings.NameValueTable	Common base for tables of name/value settings.
Settings.Secure	Secure system settings, containing system preferences that applications can read but are not allowed to write.
Settings.SettingNotFoundException
Settings.System	System settings, containing miscellaneous system preferences.
Shader	Shader is the based class for objects that return horizontal spans of colors during drawing.
Shader.TileMode
Shape	Defines 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.
ShapeDrawable	A Drawable object that draws primitive shapes.
ShapeDrawable.ShaderFactory	Base class defines a factory object that is called each time the drawable is resized (has a new width or height).
SharedPreferences	Interface for accessing and modifying preference data returned by getSharedPreferences(String, int).
SharedPreferences.Editor	Interface used for modifying values in a SharedPreferences object.
SharedPreferences.OnSharedPreferenceChangeListener	Interface definition for a callback to be invoked when a shared preference is changed.
Short	The wrapper for the primitive type `short`.
ShortBuffer	A buffer of shorts.
ShortBufferException	The exception that is thrown when the result of an operation is attempted to store in a user provided buffer that is too small.
Signature	Opaque, immutable representation of a signature associated with an application package.
Signature	`Signature` is an engine class which is capable of creating and verifying digital signatures, using different algorithms that have been registered with the Security class.
SignatureException	`SignatureException` is a general `Signature` exception.
SignatureSpi	`SignatureSpi` is the Service Provider Interface (SPI) definition for Signature.
SignedObject	A `SignedObject` instance acts as a container for another object.
Signer	This class is deprecated. Replaced by behavior in java.security.cert package and Principal
SimpleAdapter	An easy adapter to map static data to views defined in an XML file.
SimpleAdapter.ViewBinder	This class can be used by external clients of SimpleAdapter to bind values to views.
SimpleCursorAdapter	An easy adapter to map columns from a cursor to TextViews or ImageViews defined in an XML file.
SimpleCursorAdapter.CursorToStringConverter	This class can be used by external clients of SimpleCursorAdapter to define how the Cursor should be converted to a String.
SimpleCursorAdapter.ViewBinder	This class can be used by external clients of SimpleCursorAdapter to bind values fom the Cursor to views.
SimpleCursorTreeAdapter	An easy adapter to map columns from a cursor to TextViews or ImageViews defined in an XML file.
SimpleDateFormat	A concrete class for formatting and parsing dates in a locale-sensitive manner.
SimpleExpandableListAdapter	An easy adapter to map static data to group and child views defined in an XML file.
SimpleFormatter	`SimpleFormatter` can be used to print a summary of the information contained in a `LogRecord` object in a human readable format.
SimpleTimeZone	`SimpleTimeZone` is a concrete subclass of `TimeZone` that represents a time zone for use with a Gregorian calendar.
SingleClientConnManager	A connection "manager" for a single connection.
SingleClientConnManager.ConnAdapter	The connection adapter used by this manager.
SingleClientConnManager.PoolEntry	The 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().
SingleLineTransformationMethod	This 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.
SlidingDrawer	SlidingDrawer hides content out of the screen and allows the user to drag a handle to bring the content on screen.
SlidingDrawer.OnDrawerCloseListener	Callback invoked when the drawer is closed.
SlidingDrawer.OnDrawerOpenListener	Callback invoked when the drawer is opened.
SlidingDrawer.OnDrawerScrollListener	Callback invoked when the drawer is scrolled.
SM	Constants and static helpers related to the HTTP state management.
SmallTest	Marks a test that should run as part of the small tests.
Smoke	Marks a test that should run as part of the smoke tests.
SmsManager	Manages SMS operations such as sending data, text, and pdu SMS messages.
SmsMessage	A Short Message Service message.
SmsMessage.MessageClass	SMS Class enumeration.
SmsMessage.SubmitPdu	This class represents the encoded form of an outgoing SMS.
Socket	Provides a client-side TCP socket.
SocketAddress	This abstract class represents a protocol-independent base for socket-endpoint representing classes.
SocketChannel	A `SocketChannel` is a selectable channel that provides a partial abstraction of stream connecting socket.
SocketException	This `SocketException` may be thrown during socket creation or setting options, and is the superclass of all other socket related exceptions.
SocketFactory	This abstract class defines methods to create sockets.
SocketFactory	A factory for creating and connecting sockets.
SocketHandler	A handler that writes log messages to a socket connection.
SocketHttpClientConnection	Implementation of a client-side HTTP connection that can be bound to a network Socket in order to receive and transmit data.
SocketHttpServerConnection	Implementation of a server-side HTTP connection that can be bound to a network Socket in order to receive and transmit data.
SocketImpl	This class is the base of all streaming socket implementation classes.
SocketImplFactory	This interface defines a factory for socket implementations.
SocketInputBuffer	Socket bound session input buffer.
SocketOptions	Defines an interface for socket implementations to get and set socket options.
SocketOutputBuffer	Socket bound session output buffer.
SocketPermission	Regulates the access to network operations available through sockets through permissions.
SocketTimeoutException	This 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.
SoundEffectConstants	Constants to be used to play sound effects via playSoundEffect(int)
SoundPool	The SoundPool class manages and plays audio resources for applications.
Spannable	This is the interface for text to which markup objects can be attached and detached.
Spannable.Factory	Factory used by TextView to create new Spannables.
SpannableString	This is the class for text whose content is immutable but to which markup objects can be attached and detached.
SpannableStringBuilder	This is the class for text whose content and markup can both be changed.
Spanned	This is the interface for text that has markup objects attached to ranges of it.
SpannedString	This is the class for text whose content and markup are immutable.
SpanWatcher	When 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.
SparseBooleanArray	SparseBooleanArrays map integers to booleans.
SparseIntArray	SparseIntArrays map integers to integers.
Spinner	A view that displays one child at a time and lets the user pick among them.
SpinnerAdapter	Extended Adapter that is the bridge between a Spinner and its data.
SQLData	An interface for the custom mapping of an SQL User Defined Type (UDT) to a Java class.
SQLException	An exception that indicates there was an error with SQL parsing or execution.
SQLException	An `Exception` class that is used in conjunction with JDBC operations.
SQLInput	The `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.
SQLiteAbortException	An exception that indicates that the SQLite program was aborted.
SQLiteClosable	An object create from a SQLiteDatabase that can be closed.
SQLiteConstraintException	An exception that indicates that an integrity constraint was violated.
SQLiteCursor	A Cursor implementation that exposes results from a query on a SQLiteDatabase.
SQLiteCursorDriver	A driver for SQLiteCursors that is used to create them and gets notified by the cursors it creates on significant events in their lifetimes.
SQLiteDatabase	Exposes methods to manage a SQLite database.
SQLiteDatabase.CursorFactory	Used to allow returning sub-classes of Cursor when calling query.
SQLiteDatabaseCorruptException	An exception that indicates that the SQLite database file is corrupt.
SQLiteDiskIOException	An exception that indicates that an IO error occured while accessing the SQLite database file.
SQLiteDoneException	An exception that indicates that the SQLite program is done.
SQLiteException	A SQLite exception that indicates there was an error with SQL parsing or execution.
SQLiteFullException	An exception that indicates that the SQLite database is full.
SQLiteMisuseException
SQLiteOpenHelper	A helper class to manage database creation and version management.
SQLiteProgram	A base class for compiled SQLite programs.
SQLiteQuery	A SQLite program that represents a query that reads the resulting rows into a CursorWindow.
SQLiteQueryBuilder	This is a convience class that helps build SQL queries to be sent to SQLiteDatabase objects.
SQLiteStatement	A pre-compiled statement against a SQLiteDatabase that can be reused.
SQLOutput	The interface for an output stream used to write attributes of an SQL User Defined Type (UDT) to the database.
SQLPermission	A Permission relating to security access control in the `java.sql` package.
SQLWarning	An exception class that holds information about Database access warnings.
SslCertificate	SSL certificate info (certificate details) class
SslCertificate.DName	A distinguished name helper class: a 3-tuple of: - common name (CN), - organization (O), - organizational unit (OU)
SSLCertificateSocketFactory	SSLSocketFactory that provides optional (on debug devices, only) skipping of ssl certificfate chain validation and custom read timeouts used just when connecting to the server/negotiating an ssl session.
SSLContext	The public API for secure socket protocol implementations.
SSLContextSpi	The Service Provider Interface (SPI) for the `SSLContext` class.
SSLEngine	The abstract implementation of secure communications using SSL, TLS, or other protocols.
SSLEngineResult	The result object describing the state of the `SSLEngine` produced by the `wrap()` and `unwrap()` operations.
SSLEngineResult.HandshakeStatus	The `enum` describing the state of the current handshake.
SSLEngineResult.Status	The `enum` describing the result of the `SSLEngine` operation.
SslErrorHandler	SslErrorHandler: class responsible for handling SSL errors.
SSLException	The base class for all SSL related exceptions.
SSLHandshakeException	The exception that is thrown when a handshake could not be completed successfully.
SSLKeyException	The exception that is thrown when an invalid SSL key is encountered.
SSLPeerUnverifiedException	The exception that is thrown when the identity of a peer has not beed verified.
SSLPermission	The class representing a network permission.
SSLProtocolException	The exception that is thrown when an error in the operation of the SSL protocol is encountered.
SSLServerSocket	The extension of `ServerSocket` which provides secure server sockets based on protocols like SSL, TLS, or others.
SSLServerSocketFactory	The factory for SSL server sockets.
SSLSession	The interface representing an SSL session.
SSLSessionBindingEvent	The event sent to an `SSLSessionBindingListener` when the listener object is bound (putValue(String, Object)) or unbound (removeValue(String)) to an `SSLSession`.
SSLSessionBindingListener	The interface to be implemented by any object that requires notification when data objects are bound to (or unbound from) an `SSLSession`.
SSLSessionContext	A collection of `SSLSession`s.
SSLSocket	The extension of `Socket` providing secure protocols like SSL (Secure Socket Layer") or TLS (Transport Layer Security).
SSLSocketFactory	The abstract factory implementation to create `SSLSocket`s.
SSLSocketFactory	Layered 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.
StackOverflowError	Thrown when the depth of the callstack of the running program excedes some platform or virtual machine specific limit.
StackTraceElement	A representation of a single stack frame.
StaleDataException	This exception is thrown when a Cursor contains stale data and must be requeried before being used again.
StaleDexCacheError	Is thrown when the VM determines that a DEX file's cache is out of date, and that there is no way to recreate it.
StartElementListener	Listens for the beginning of elements.
StateListDrawable	Lets you assign a number of graphic images to a single Drawable and swap out the visible item by a string ID value.
Statement	Interface used for executing static SQL statements to retrieve query results.
StateSet	State sets are arrays of positive ints where each element represents the state of a View (e.g.
StatFs	Retrieve overall information about the space on a filesystem.
StaticLayout	StaticLayout is a Layout for text that will not be edited after it is laid out.
StatusLine	Represents a status line as returned from a HTTP server.
StreamCorruptedException	Signals 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).
StreamHandler	A `StreamHandler` object writes log messages to an output stream, that is, objects of the class OutputStream.
StreamTokenizer	Parses a stream into a set of defined tokens, one at a time.
StrictContentLengthStrategy	The strict implementation of the content length strategy.
StrictHostnameVerifier	The Strict HostnameVerifier works the same way as Sun Java 1.4, Sun Java 5, Sun Java 6-rc.
StrictMath	Class StrictMath provides basic math constants and operations such as trigonometric functions, hyperbolic functions, exponential, logarithms, etc.
StrikethroughSpan
String	An immutable sequence of characters/code units (`char`s).
StringBuffer	StringBuffer is a variable size contiguous indexable array of characters.
StringBufferInputStream	This class is deprecated. Use StringReader
StringBuilder	A modifiable sequence of characters for use in creating and modifying Strings.
StringBuilderPrinter	Implementation of a Printer that sends its output to a StringBuilder.
StringCharacterIterator	An implementation of CharacterIterator for strings.
StringEntity	An entity whose content is retrieved from a string.
StringIndexOutOfBoundsException	Thrown when the a string is indexed with a value less than zero, or greater than or equal to the size of the array.
StringReader	A specialized Reader that reads characters from a `String` in a sequential manner.
StringTokenizer	The `StringTokenizer` class allows an application to break a string into tokens by performing code point comparison.
StringWriter	A specialized Writer that writes characters to a `StringBuffer` in a sequential manner, appending them in the process.
Struct	An interface which provides facilities for manipulating an SQL structured type as a Java object.
StyleSpan	Describes a style in a span.
Subject	The central class of the `javax.security.auth` package representing an authenticated user or entity (both referred to as "subject").
SubjectDomainCombiner	Merges permissions based on code source and code signers with permissions granted to the specified Subject.
SubMenu	Subclass of Menu for sub menus.
SubscriptSpan
SumPathEffect
SuperscriptSpan
SupplicantState	From `defs.h` in `wpa_supplicant`.
Suppress	Use this annotation on test classes or test methods that should not be included in a test suite.
SuppressWarnings	Annotation type used to indicate that the compiler should not issue the specified warnings for the marked program element.
Surface	Handle on to a raw buffer that is being managed by the screen compositor.
Surface.OutOfResourcesException	Exception thrown when a surface couldn't be created or resized
SurfaceHolder	Abstract interface to someone holding a display surface.
SurfaceHolder.BadSurfaceTypeException	Exception that is thrown from lockCanvas() when called on a Surface whose is SURFACE_TYPE_PUSH_BUFFERS.
SurfaceHolder.Callback	A client may implement this interface to receive information about changes to the surface.
SurfaceView	Provides a dedicated drawing surface embedded inside of a view hierarchy.
SweepGradient
SyncBaseInstrumentation	If you would like to test sync a single provider with an InstrumentationTestCase, this provides some of the boiler plate in setUp() and tearDown().
SyncBasicHttpContext	Thread-safe extension of the BasicHttpContext.
SyncFailedException	Signals that the sync() method has failed to complete.
SynchronousQueue<E>	A blocking queue in which each `put` must wait for a `take`, and vice versa.
System	Provides access to system-related information and resources including standard input and output.
SystemClock	Core timekeeping facilities.

T

TabActivity	An activity that contains and runs multiple embedded activities or views.
TabHost	Container for a tabbed window view.
TabHost.OnTabChangeListener	Interface definition for a callback to be invoked when tab changed
TabHost.TabContentFactory	Makes the content of a tab when it is selected.
TabHost.TabSpec	A tab has a tab indictor, 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 FILL_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.
TabStopSpan
TabStopSpan.Standard
TabWidget	Displays a list of tab labels representing each page in the parent's tab collection.
Target	Defines a meta-annotation for determining what ElementTypes an annotation can be applied to.
TelephonyManager	Provides access to information about the telephony services on the device.
TemporaryDirectory	Utility class to handle the setup of the core library's concept of what the "default temporary directory" is.
Test	A Test can be run and collect its results.
TestCase	A test case defines the fixture to run multiple tests.
TestFailure	A `TestFailure` collects a failed test together with the caught exception.
TestListener	A Listener for test progress
TestMethod	Represents a test to be run.
TestResult	A `TestResult` collects the results of executing a test case.
TestSuite	A `TestSuite` is a `Composite` of Tests.
TestSuiteBuilder	Build suites based on a combination of included packages, excluded packages, and predicates that must be satisfied.
TestSuiteBuilder.FailedToCreateTests	A special TestCase used to indicate a failure during the build() step.
TestSuiteLoader	An interface to define how a test suite should be loaded.
TestSuiteProvider	Implementors will know how to get a test suite.
TestTarget	Defines an annotation used be used within the TestInfo annotation.
TestTargetClass	Defines an annotation for test classes that allows to link them to the class that is being tested.
Text	The `Text` interface inherits from `CharacterData` and represents the textual content (termed character data in XML) of an `Element` or `Attr`.
TextAppearanceSpan	Sets the text color, size, style, and typeface to match a TextAppearance resource.
TextAttribute	The TextAttribute class defines attribute keys and attribute values for text rendering.
TextElementListener	Listens for the beginning and ending of text elements.
TextKeyListener	This is the key listener for typing normal text.
TextKeyListener.Capitalize
TextPaint	TextPaint is an extension of Paint that leaves room for some extra data used during text measuring and drawing.
TextSwitcher	Specialized ViewSwitcher that contains only children of type TextView.
TextUtils
TextUtils.EllipsizeCallback
TextUtils.SimpleStringSplitter	A simple string splitter.
TextUtils.StringSplitter	An interface for splitting strings according to rules that are opaque to the user of this interface.
TextUtils.TruncateAt
TextView	Displays text to the user and optionally allows them to edit it.
TextView.BufferType
TextView.OnEditorActionListener	Interface definition for a callback to be invoked when an action is performed on the editor.
TextView.SavedState	User interface state that is stored by TextView for implementing onSaveInstanceState().
TextWatcher	When an object of a type is attached to an Editable, its methods will be called when the text is changed.
Thread	A `Thread` is a concurrent unit of execution.
Thread.State	A representation of a thread's state.
Thread.UncaughtExceptionHandler	Implemented by objects that want to handle cases where a thread is being terminated by an uncaught exception.
ThreadDeath	ThreadDeath is thrown when a thread stops executing.
ThreadFactory	An object that creates new threads on demand.
ThreadGroup	A `ThreadGroup` 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.
ThreadPoolExecutor	An ExecutorService that executes each submitted task using one of possibly several pooled threads, normally configured using Executors factory methods.
ThreadPoolExecutor.AbortPolicy	A handler for rejected tasks that throws a `RejectedExecutionException`.
ThreadPoolExecutor.CallerRunsPolicy	A 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.DiscardOldestPolicy	A 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.DiscardPolicy	A handler for rejected tasks that silently discards the rejected task.
ThreadSafeClientConnManager	Manages a pool of client connections.
Throwable	The superclass of all classes which can be thrown by the virtual machine.
Time	The Time class is a faster replacement for the java.util.Calendar and java.util.GregorianCalendar classes.
Time	Java representation of an SQL `TIME` value.
TimeFormatException
TimeKeyListener	For entering times in a text field.
TimeoutException	Exception thrown when a blocking operation times out.
TimePicker	A view for selecting the time of day, in either 24 hour or AM/PM mode.
TimePicker.OnTimeChangedListener	The callback interface used to indicate the time has been adjusted.
TimePickerDialog	A dialog that prompts the user for the time of day using a TimePicker.
TimePickerDialog.OnTimeSetListener	The callback interface used to indicate the user is done filling in the time (they clicked on the 'Set' button).
Timer	`Timer`s are used to schedule jobs for execution in a background process.
TimerTask	The `TimerTask` class represents a task to run at a specified time.
Timestamp	`Timestamp` represents a signed time stamp.
Timestamp	A Java representation of the SQL `TIMESTAMP` type.
TimeUnit	A `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.
TimeUtils	A class containing utility methods related to time zones.
TimeZone	`TimeZone` represents a time zone offset, taking into account daylight savings.
TimingLogger	A utility class to help log timings splits throughout a method call.
Toast	A toast is a view containing a quick little message for the user. The toast class helps you create and show those.
ToggleButton	Displays checked/unchecked states as a button with a "light" indicator and by default accompanied with the text "ON" or "OFF".
TokenIterator	An iterator for String tokens.
TokenWatcher	Helper class that helps you use IBinder objects as reference counted tokens.
ToneGenerator	This 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).
TooManyListenersException	A `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
TouchDelegate	Helper class to handle situations where you want a view to have a larger touch area than its actual view bounds.
TouchDex	Induces optimization/verification of a set of DEX files.
TouchUtils	Reusable methods for generating touch events.
Transformation	Defines the transformation to be applied at one point in time of an Animation.
TransformationMethod	TextView 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.
TransitionDrawable	An extension of LayerDrawables that is intended to cross-fade between the first and second layer.
TranslateAnimation	An animation that controls the position of an object.
TreeMap<K, V>	TreeMap is an implementation of SortedMap.
TreeSet<E>	TreeSet is an implementation of SortedSet.
TrustAnchor	This class represents a trust anchor for validation of X.509 certification path.
TrustManager	The marker interface for JSSE trust managers.
TrustManagerFactory	The factory for `TrustManager`s based on `KeyStore` or provider specific implementation.
TrustManagerFactorySpi	The Service Provider Interface (SPI) for the `TrustManagerFactory` class.
TunnelRefusedException
TwoLineListItem	A view group with two children, intended for use in ListViews.
Type	Common interface implemented by all Java types.
TypedArray	Container for an array of values that were retrieved with obtainStyledAttributes(AttributeSet, int[], int, int) or obtainAttributes(AttributeSet, int[]).
TypedValue	Container for a dynamically typed data value.
Typeface	The Typeface class specifies the typeface and intrinsic style of a font.
TypefaceSpan	Changes the typeface family of the text to which the span is attached.
TypeNotPresentException	Thrown 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.
Types	A 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

UiThreadTest	This annotation can be used on an InstrumentationTestCase's test methods.
UndeclaredThrowableException	This class provides a wrapper for an undeclared, checked exception thrown by an InvocationHandler.
UnderlineSpan
UnknownError	Thrown when the virtual machine must throw an error which does not match any known exceptional condition.
UnknownFormatConversionException	An `UnknownFormatConversionException` will be thrown if the format conversion is unknown.
UnknownFormatFlagsException	An `UnknownFormatFlagsException` will be thrown if there is an unknown flag.
UnknownHostException	Is thrown when a hostname can not be resolved.
UnknownServiceException	Is thrown if no appropriate `ContentHandler` could be found for a particular service requested by the URL connection.
UnmappableCharacterException	An `UnmappableCharacterException` is thrown when an unmappable character for the given charset is encountered.
UnrecoverableEntryException	`UnrecoverableEntryException` indicates, that a `KeyStore.Entry` cannot be recovered from a `KeyStore`.
UnrecoverableKeyException	`UnrecoverableKeyException` indicates, that a key cannot be recovered from a `KeyStore`.
UnresolvedAddressException	An `UnresolvedAddressException` is thrown when trying to use an unresolved network address in a network operation.
UnresolvedPermission	An `UnresolvedPermission` represents a `Permission` whose type should be resolved lazy and not during initialization time of the `Policy`.
UnsatisfiedLinkError	Thrown when an attempt is made to invoke a native for which an implementation could not be found.
UnsupportedAddressTypeException	An `UnsupportedAddressTypeException` is thrown when connecting or binding to an unsupported address type.
UnsupportedCallbackException	Thrown when a CallbackHandler does not support a particular Callback.
UnsupportedCharsetException	An `UnsupportedCharsetException` is thrown when an unsupported charset name is encountered.
UnsupportedClassVersionError	Thrown when an attempt is made to load a class with a format version that is not supported by the virtual machine.
UnsupportedDigestAlgorithmException	Authentication credentials required to respond to a authentication challenge are invalid
UnsupportedEncodingException	Signals that a requested character encoding is not available, either because it is not included a specific Android system, or because the encoding name is simply incorrect.
UnsupportedHttpVersionException	Indicates an unsupported version of the HTTP protocol.
UnsupportedOperationException	Thrown when an unsupported operation is attempted.
UpdateAppearance	The classes that affect character-level text in a way that modifies their appearance when one is added or removed must implement this interface.
UpdateLayout	The 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.
Uri	Immutable URI reference.
URI	This class represents an instance of a URI as defined by RFC 2396.
Uri.Builder	Helper class for building or manipulating URI references.
UriMatcher	Utility class to aid in matching URIs in content providers.
UriPatternMatcher	Maintains a map of objects keyed by a request URI pattern.
URISyntaxException	A `URISyntaxException` will be thrown if some information could not be parsed while creating a URI.
URIUtils	A collection of utilities for URIs, to workaround bugs within the class or for ease-of-use features.
URL	A URL instance specifies the location of a resource on the internet as specified by RFC 1738.
URLClassLoader	This class loader is responsible for loading classes and resources from a list of URLs which can refer to either directories or JAR files.
URLConnection	Concrete implementations of the abstract `URLConnection` class provide a communication link to a URL for exchanging data with a specific protocol type.
URLDecoder	This class is used to decode a string which is encoded in the `application/x-www-form-urlencoded` MIME content type.
UrlEncodedFormEntity	An entity composed of a list of url-encoded pairs.
URLEncodedUtils	A collection of utilities for encoding URLs.
URLEncoder	This class is used to encode a string using the format required by `application/x-www-form-urlencoded` MIME content type.
UrlInterceptHandler
UrlInterceptRegistry
UrlQuerySanitizer	Sanitizes the Query portion of a URL.
UrlQuerySanitizer.IllegalCharacterValueSanitizer	Sanitize values based on which characters they contain.
UrlQuerySanitizer.ParameterValuePair	A simple tuple that holds parameter-value pairs.
UrlQuerySanitizer.ValueSanitizer	A functor used to sanitize a single query value.
URLSpan
URLStreamHandler	The abstract class `URLStreamHandler` is the base for all classes which can handle the communication with a URL object over a particular protocol type.
URLStreamHandlerFactory	Defines a factory which creates an `URLStreamHandler` for a specified protocol.
URLUtil
UserDictionary	A provider of user defined words for input methods to use for predictive text input.
UserDictionary.Words	Contains the user defined words.
UsernamePasswordCredentials	Username and password Credentials
UserTokenHandler	A handler for determining if the given execution context is user specific or not.
UTFDataFormatException	Signals that an incorrectly encoded UTF-8 string has been encountered, most likely while reading some DataInputStream.
UUID	UUID is an immutable representation of a 128-bit universally unique identifier (UUID).

V

Vector<E>	Vector is a variable size contiguous indexable array of objects.
VelocityTracker	Helper for tracking the velocity of touch events, for implementing flinging and other such gestures.
VerifyError	Thrown when the virtual machine notices that an attempt is made to load a class which does not pass the class verification phase.
Version	This class defines the current version of JUnit
VersionInfo	Provides access to version information for HTTP components.
Vibrator	Class that operates the vibrator on the device.
VideoView	Displays a video file.
View	This class represents the basic building block for user interface components.
View.BaseSavedState	Base class for derived classes that want to save and restore their own state in onSaveInstanceState().
View.MeasureSpec	A MeasureSpec encapsulates the layout requirements passed from parent to child.
View.OnClickListener	Interface definition for a callback to be invoked when a view is clicked.
View.OnCreateContextMenuListener	Interface definition for a callback to be invoked when the context menu for this view is being built.
View.OnFocusChangeListener	Interface definition for a callback to be invoked when the focus state of a view changed.
View.OnKeyListener	Interface definition for a callback to be invoked when a key event is dispatched to this view.
View.OnLongClickListener	Interface definition for a callback to be invoked when a view has been clicked and held.
View.OnTouchListener	Interface definition for a callback to be invoked when a touch event is dispatched to this view.
ViewAnimator	Base class for a FrameLayout container that will perform animations when switching between its views.
ViewAsserts	Some useful assertions about views.
ViewConfiguration	Contains methods to standard constants used in the UI for timeouts, sizes, and distances.
ViewDebug	Various debugging/tracing tools related to View and the view hierarchy.
ViewDebug.CapturedViewProperty	This annotation can be used to mark fields and methods to be dumped when the view is captured.
ViewDebug.ExportedProperty	This annotation can be used to mark fields and methods to be dumped by the view server.
ViewDebug.HierarchyTraceType	Defines the type of hierarhcy trace to output to the hierarchy traces file.
ViewDebug.IntToString	Defines a mapping from an int value to a String.
ViewDebug.RecyclerTraceType	Defines the type of recycler trace to output to the recycler traces file.
ViewFlipper	Simple 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.LayoutParams	LayoutParams are used by views to tell their parents how they want to be laid out.
ViewGroup.MarginLayoutParams	Per-child layout information for layouts that support margins.
ViewGroup.OnHierarchyChangeListener	Interface definition for a callback to be invoked when the hierarchy within this view changed.
ViewManager	Interface to let you add and remove child views to an Activity.
ViewParent	Defines the responsibilities for a class that will be a parent of a View.
ViewStub	A ViewStub is an invisible, zero-sized View that can be used to lazily inflate layout resources at runtime.
ViewStub.OnInflateListener	Listener used to receive a notification after a ViewStub has successfully inflated its layout resource.
ViewSwitcher	ViewAnimator that switches between two views, and has a factory from which these views are created.
ViewSwitcher.ViewFactory	Creates views in a ViewSwitcher.
ViewTreeObserver	A view tree observer is used to register listeners that can be notified of global changes in the view tree.
ViewTreeObserver.OnGlobalFocusChangeListener	Interface definition for a callback to be invoked when the focus state within the view tree changes.
ViewTreeObserver.OnGlobalLayoutListener	Interface definition for a callback to be invoked when the global layout state or the visibility of views within the view tree changes.
ViewTreeObserver.OnPreDrawListener	Interface definition for a callback to be invoked when the view tree is about to be drawn.
ViewTreeObserver.OnScrollChangedListener	Interface definition for a callback to be invoked when something in the view tree has been scrolled.
ViewTreeObserver.OnTouchModeChangeListener	Interface definition for a callback to be invoked when the touch mode changes.
VirtualMachineError	`VirtualMachineError` is the superclass of all error classes that occur during the operation of the virtual machine.
Visibility	A collection of utility methods for computing the visibility of triangle meshes.
VMDebug	Provides access to some VM-specific debug features.
VMRuntime	Provides an interface to VM-global, Dalvik-specific features.
VMStack	Provides a limited interface to the Dalvik VM stack.
Void	Placeholder class for the Java keyword `void`.

W

WaitingThread	Represents a thread waiting for a connection.
WaitingThreadAborter	A simple class that can interrupt a WaitingThread.
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.
WebBackForwardList	This class contains the back/forward list for a WebView.
WebChromeClient
WebHistoryItem	A convenience class for accessing fields in an entry in the back/forward list of a WebView.
WebIconDatabase	Functions for manipulating the icon database used by WebView.
WebIconDatabase.IconListener	Interface for receiving icons from the database.
WebSettings	Manages settings state for a WebView.
WebSettings.LayoutAlgorithm	Enum for controlling the layout of html.
WebSettings.RenderPriority
WebSettings.TextSize	Enum for specifying the text size.
WebView	A View that displays web pages.
WebView.HitTestResult
WebView.PictureListener	Interface to listen for new pictures as they change.
WebView.WebViewTransport	Transportation object for returning WebView across thread boundaries.
WebViewClient
WebViewDatabase
WifiConfiguration	A class representing a configured Wi-Fi network, including the security configuration.
WifiConfiguration.AuthAlgorithm	Recognized IEEE 802.11 authentication algorithms.
WifiConfiguration.GroupCipher	Recognized group ciphers.
WifiConfiguration.KeyMgmt	Recognized key management schemes.
WifiConfiguration.PairwiseCipher	Recognized pairwise ciphers for WPA.
WifiConfiguration.Protocol	Recognized security protocols.
WifiConfiguration.Status	Possible status of a network configuration.
WifiInfo	Describes the state of any Wifi connection that is active or is in the process of being set up.
WifiManager	This class provides the primary API for managing all aspects of Wi-Fi connectivity.
WifiManager.WifiLock	Allows an application to keep the Wi-Fi radio awake.
WildcardType	This 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'`.
Window	Abstract base class for a top-level window look and behavior policy.
Window.Callback	API from a Window back to its caller.
WindowManager	The interface that apps use to talk to the window manager.
WindowManager.BadTokenException	Exception that is thrown when trying to add view whose WindowManager.LayoutParams token is invalid.
WindowManager.LayoutParams
Wire	Logs data to the wire LOG.
WrapperListAdapter	List adapter that wraps another list adapter.
WrapTogetherSpan
WritableByteChannel	A `WritableByteChannel` is a type of Channel that can write bytes.
WriteAbortedException	Signals that the readObject() method has detected an exception marker in the input stream.
Writer	The base class for all writers.

X

X500Principal	Represents an X.500 principal, which holds the distinguished name of some network entity.
X509Certificate	Abstract base class for X.509 certificates.
X509Certificate	Abstract base class for X.509 certificates.
X509CertSelector	A certificate selector (`CertSelector` for selecting `X509Certificate`s that match the specified criteria.
X509CRL	Abstract base class for X.509 certificate revocation lists (CRL).
X509CRLEntry	Abstract base class for entries in a certificate revocation list (CRL).
X509CRLSelector	A CRL selector (`CRLSelector` for selecting `X509CRL`s that match the specified criteria.
X509EncodedKeySpec	The key specification of an X.509 encoded key in ASN.1 format.
X509ExtendedKeyManager	The abstract extension for the `X509KeyManager` interface.
X509Extension	The interface specifying an X.509 Certificate or CRL extension.
X509HostnameVerifier	Interface for checking if a hostname matches the names stored inside the server's X.509 certificate.
X509KeyManager	A Key Manager for X509 certificate-based key pairs.
X509TrustManager	The trust manager for X509 certificates to be used to perform authentication for secure sockets.
Xfermode	Xfermode is the base class for objects that are called to implement custom "transfer-modes" in the drawing pipeline.
Xml	XML utility methods.
Xml.Encoding	Supported character encodings.
XMLConstants	Defines several standard constants that are often used during XML processing.
XMLFilter	Interface for an XML filter.
XMLFilterImpl	Base class for deriving an XML filter.
XMLFormatter	Formatter to convert a LogRecord into an XML string.
XmlPullParser	XML Pull Parser is an interface that defines parsing functionlity provided in XMLPULL V1 API (visit this website to learn more about API and its implementations).
XmlPullParserException	This exception is thrown to signal XML Pull Parser related faults.
XmlPullParserFactory	This class is used to create implementations of XML Pull Parser defined in XMPULL V1 API.
XMLReader	Interface for reading an XML document using callbacks.
XMLReaderAdapter	Adapt a SAX2 XMLReader as a SAX1 Parser.
XMLReaderFactory	Factory for creating an XML reader.
XmlResourceParser	The XML parsing interface returned for an XML resource.
XmlSerializer	Define an interface to serialziation of XML Infoset.

Z

ZipEntry	An instance of `ZipEntry` represents an entry within a ZIP-archive.
ZipException	This runtime exception is thrown by `ZipFile` and `ZipInputStream` when the file or stream is not a valid ZIP file.
ZipFile	This class provides random read access to a ZIP-archive file.
ZipInputStream	This class provides an implementation of `FilterInputStream` that uncompresses data from a ZIP-archive input stream.
ZipOutputStream	This class provides an implementation of `FilterOutputStream` that compresses data entries into a ZIP-archive output stream.
ZoomButton
ZoomControls	The `ZoomControls` class displays a simple set of controls used for zooming and provides callbacks to register for events.
Zygote	Provides access to the Dalvik "zygote" feature, which allows a VM instance to be partially initialized and then fork()'d from the partially initialized state.