Class Index

Kotlin |Java

These are all the API classes. See all API packages.

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

A

AbsSavedState	A `Parcelable` implementation that should be used by inheritance hierarchies to ensure the state of all classes along the chain is saved.
AbstractDetailsDescriptionPresenter	An abstract `Presenter` for rendering a detailed description of an item.
AbstractDetailsDescriptionPresenter.ViewHolder	The ViewHolder for the `AbstractDetailsDescriptionPresenter`.
AbstractMediaItemPresenter	Abstract `Presenter` class for rendering media items in a playlist format.
AbstractMediaItemPresenter.ViewHolder	The ViewHolder for the `AbstractMediaItemPresenter`.
AbstractMediaListHeaderPresenter	Abstract presenter class for rendering the header for a list of media items in a playlist.
AbstractMediaListHeaderPresenter.ViewHolder	The ViewHolder for the `AbstractMediaListHeaderPresenter`.
AbstractSavedStateViewModelFactory	Skeleton of androidx.
AccessibilityClickableSpanCompat	`ClickableSpan` cannot be parceled, but accessibility services need to be able to cause their callback handlers to be called.
AccessibilityDelegateCompat	Helper for accessing `AccessibilityDelegate`.
AccessibilityEventCompat	Helper for accessing features in `AccessibilityEvent`.
AccessibilityManagerCompat	Helper for accessing features in `AccessibilityManager`.
AccessibilityManagerCompat.AccessibilityStateChangeListener	Listener for the accessibility state.
AccessibilityManagerCompat.AccessibilityStateChangeListenerCompat	Listener for the accessibility state.
AccessibilityManagerCompat.TouchExplorationStateChangeListener	Listener for the system touch exploration state.
AccessibilityNodeInfoCompat	Helper for accessing `android.view.accessibility.AccessibilityNodeInfo` in a backwards compatible fashion.
AccessibilityNodeInfoCompat.AccessibilityActionCompat	A class defining an action that can be performed on an `AccessibilityNodeInfo`.
AccessibilityNodeInfoCompat.CollectionInfoCompat	Class with information if a node is a collection.
AccessibilityNodeInfoCompat.CollectionItemInfoCompat	Class with information if a node is a collection item.
AccessibilityNodeInfoCompat.RangeInfoCompat	Class with information if a node is a range.
AccessibilityNodeInfoCompat.TouchDelegateInfoCompat	Class with information of touch delegated views and regions.
AccessibilityNodeProviderCompat	Helper for accessing `android.view.accessibility.AccessibilityNodeProvider`.
AccessibilityRecordCompat	Helper for accessing `AccessibilityRecord`.
AccessibilityServiceInfoCompat	Helper for accessing features in `AccessibilityServiceInfo`.
AccessibilityViewCommand	Functional interface used to create a custom accessibility action.
AccessibilityViewCommand.CommandArguments	Object containing arguments passed into an `AccessibilityViewCommand`
AccessibilityViewCommand.MoveAtGranularityArguments	Arguments for `#ACTION_NEXT_AT_MOVEMENT_GRANULARITY` and `#ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY`
AccessibilityViewCommand.MoveHtmlArguments	Arguments for `AccessibilityNodeInfoCompat#ACTION_NEXT_HTML_ELEMENT` and `#ACTION_PREVIOUS_HTML_ELEMENT`
AccessibilityViewCommand.MoveWindowArguments	Arguments for `#ACTION_MOVE_WINDOW`
AccessibilityViewCommand.ScrollToPositionArguments	Arguments for `#ACTION_SCROLL_TO_POSITION`
AccessibilityViewCommand.SetProgressArguments	Arguments for `#ACTION_SET_PROGRESS`
AccessibilityViewCommand.SetSelectionArguments	Arguments for `#ACTION_SET_SELECTION`
AccessibilityViewCommand.SetTextArguments	Arguments for `AccessibilityNodeInfoCompat.AccessibilityActionCompat#ACTION_SET_TEXT`
AccessibilityWindowInfoCompat	Helper for accessing `android.view.accessibility.AccessibilityWindowInfo`.
Action	An action contains one or two lines of text, an optional image and an optional id.
ActionBar	A primary toolbar within the activity that may display the activity title, application-level navigation affordances, and other interactive items.
ActionBar.LayoutParams	Per-child layout information associated with action bar custom views.
ActionBar.OnMenuVisibilityListener	Listener for receiving events when action bar menus are shown or hidden.
ActionBar.OnNavigationListener	Listener interface for ActionBar navigation events.
ActionBar.Tab	A tab in the action bar.
ActionBar.TabListener	Callback interface invoked when a tab is focused, unfocused, added, or removed.
ActionBarDrawerToggle	This class provides a handy way to tie together the functionality of `DrawerLayout` and the framework `ActionBar` to implement the recommended design for navigation drawers.
ActionBarDrawerToggle.Delegate
ActionBarDrawerToggle.DelegateProvider	Allows an implementing Activity to return an `ActionBarDrawerToggle.Delegate` to use with ActionBarDrawerToggle.
ActionListItem	Class to build a list item that has up to two actions.
ActionListItem.ViewHolder	Holds the children views of `ActionListItem`.
ActionMenuView	ActionMenuView is a presentation of a series of menu options as a View.
ActionMenuView.LayoutParams
ActionMenuView.OnMenuItemClickListener	Interface responsible for receiving menu item click events if the items themselves do not have individual item click listeners.
ActionMode	Represents a contextual mode of the user interface.
ActionMode.Callback	Callback interface for action modes.
ActionOnlyNavDirections	An implementation of `NavDirections` without any arguments.
ActionProvider	This class is a mediator for accomplishing a given task, for example sharing a file.
ActionProvider.VisibilityListener	Listens to changes in visibility as reported by `ActionProvider#refreshVisibility()`.
ActivityCompat	Helper for accessing features in `android.app.Activity`.
ActivityCompat.OnRequestPermissionsResultCallback	This interface is the contract for receiving the results for permission requests.
ActivityCompat.PermissionCompatDelegate	Customizable delegate that allows delegating permission compatibility methods to a custom implementation.
ActivityInfoCompat	Helper for accessing features in `android.content.pm.ActivityInfo`.
ActivityManagerCompat	Helper for accessing features in `android.app.ActivityManager` in a backwards compatible fashion.
ActivityNavigator	ActivityNavigator implements cross-activity navigation.
ActivityNavigator.Destination	NavDestination for activity navigation
ActivityNavigator.Extras	Extras that can be passed to ActivityNavigator to customize what `ActivityOptionsCompat` and flags are passed through to the call to `ActivityCompat#startActivity(Context, Intent, Bundle)`.
ActivityNavigator.Extras.Builder	Builder for constructing new `Extras` instances.
ActivityNavigatorDestinationBuilder	DSL for constructing a new ActivityNavigator.Destination
ActivityOptionsCompat	Helper for accessing features in `android.app.ActivityOptions` in a backwards compatible fashion.
AdapterListUpdateCallback	ListUpdateCallback that dispatches update events to the given adapter.
AdvertisingIdClient	Client for retrieving Advertising ID related info from an AndroidX ID Provider installed on the device.
AdvertisingIdInfo	Advertising ID Information.
AdvertisingIdNotAvailableException	Indicates an AndroidX Advertising ID is not available.
AdvertisingIdProvider	The class for the AndroidX Advertising ID Provider that should provide the resettable ID and LAT preference should implement this interface.
AdvertisingIdProviderInfo	A `AdvertisingIdProviderInfo` represents the information about an Advertising ID Provider installed on the device.
AdvertisingIdProviderManager	The AdvertisingIdProviderManager will be used by an Advertising ID Provider to register the provider implementation or retrieve all the Advertising ID Providers on the device.
AdvertisingIdService	The internal service of AndroidX Advertising ID Provider library to provide the Advertising ID.
AlarmManagerCompat	Compatibility library for `AlarmManager` with fallbacks for older platforms.
AlertDialog	A subclass of Dialog that can display one, two or three buttons.
AlertDialog.Builder
AlphaJumpAdapter	An interface that you can implement on your Adapter to enable support for Alpha-Jump.
AlphaJumpBucket	A bucket represents a "button" in the alpha-jump menu.
AlphaJumpBucketer	A helper class for building the list of buckets for alpha jump.
AlphaJumpBucketer.Bucket	A basic implementation of `AlphaJumpBucket`.
AlphaJumpOverlayView	This view shows a grid of alphabetic letters that you can tap on to advance a list to the beginning of that list.
AmbientMode	Use this as a headless Fragment to add ambient support to an Activity on Wearable devices.
AmbientMode.AmbientCallback	Callback to receive ambient mode state changes.
AmbientMode.AmbientCallbackProvider	Interface for any `Activity` that wishes to implement Ambient Mode.
AmbientMode.AmbientController	A class for interacting with the ambient mode on a wearable device.
AmbientModeSupport	Use this as a headless Fragment to add ambient support to an Activity on Wearable devices.
AmbientModeSupport.AmbientCallback	Callback to receive ambient mode state changes.
AmbientModeSupport.AmbientCallbackProvider	Interface for any `Activity` that wishes to implement Ambient Mode.
AmbientModeSupport.AmbientController	A class for interacting with the ambient mode on a wearable device.
AndroidBenchmarkRunner	Instrumentation runner for benchmarks, used to increase stability of measurements and minimize interference.
AndroidViewModel	Application context aware `ViewModel`.
Animatable2Compat	Interface that drawables supporting animations and callbacks should extend in support lib.
Animatable2Compat.AnimationCallback	Abstract class for animation callback.
AnimatedStateListDrawableCompat	A `Drawable` providing animated transitions between states.
AnimatedVectorDrawableCompat	For API 24 and above, this class is delegating to the framework's .
AnimatorRes	Denotes that an integer parameter, field or method return value is expected to be an animator resource reference (e.g.
AnimBuilder	DSL for setting custom Animation or Animator resources on a NavOptionsBuilder
AnimRes	Denotes that an integer parameter, field or method return value is expected to be an anim resource reference (e.g.
AnyRes	Denotes that an integer parameter, field or method return value is expected to be a resource reference of any type.
AnyThread	Denotes that the annotated method can be called from any thread (e.g. it is "thread safe".) If the annotated element is a class, then all methods in the class can be called from any thread.
AppBarConfiguration	Configuration options for `NavigationUI` methods that interact with implementations of the app bar pattern such as `androidx.appcompat.widget.Toolbar`, `com.google.android.material.appbar.CollapsingToolbarLayout`, and `androidx.appcompat.app.ActionBar`.
AppBarConfiguration.Builder	The Builder class for constructing new `AppBarConfiguration` instances.
AppBarConfiguration.OnNavigateUpListener	Interface for providing custom 'up' behavior beyond what is provided by `androidx.navigation.NavController#navigateUp()`.
AppCompatActivity	Base class for activities that use the support library action bar features.
AppCompatAutoCompleteTextView	A `AutoCompleteTextView` which supports compatible features on older versions of the platform, including: Allows dynamic tint of its background via the background tint methods in `androidx.core.view.ViewCompat`. Allows setting of the background tint using R.attr#backgroundTint and R.attr#backgroundTintMode.
AppCompatButton	A `Button` which supports compatible features on older versions of the platform, including: Allows dynamic tint of its background via the background tint methods in `androidx.core.view.ViewCompat`. Allows setting of the background tint using R.attr#backgroundTint and R.attr#backgroundTintMode.
AppCompatCallback	Implemented this in order for AppCompat to be able to callback in certain situations.
AppCompatCheckBox	A `CheckBox` which supports compatible features on older versions of the platform, including: Allows dynamic tint of its background via the background tint methods in `androidx.core.widget.CompoundButtonCompat`. Allows setting of the background tint using R.attr#buttonTint and R.attr#buttonTintMode.
AppCompatCheckedTextView	A `CheckedTextView` which supports compatible features on older versions of the platform.
AppCompatDelegate	This class represents a delegate which you can use to extend AppCompat's support to any `android.app.Activity`.
AppCompatDialog	Base class for AppCompat themed `android.app.Dialog`s.
AppCompatDialogFragment	A special version of `DialogFragment` which uses an `AppCompatDialog` in place of a platform-styled dialog.
AppCompatEditText	A `EditText` which supports compatible features on older versions of the platform, including: Allows dynamic tint of its background via the background tint methods in `androidx.core.view.ViewCompat`. Allows setting of the background tint using R.attr#backgroundTint and R.attr#backgroundTintMode.
AppCompatImageButton	A `ImageButton` which supports compatible features on older versions of the platform, including: Allows dynamic tint of its background via the background tint methods in `androidx.core.view.ViewCompat`. Allows setting of the background tint using R.attr#backgroundTint and R.attr#backgroundTintMode. Allows dynamic tint of its image via the image tint methods in `ImageViewCompat`. Allows setting of the image tint using R.attr#tint and R.attr#tintMode.
AppCompatImageView	A `ImageView` which supports compatible features on older versions of the platform, including: Allows dynamic tint of its background via the background tint methods in `androidx.core.view.ViewCompat`. Allows setting of the background tint using androidx.appcompat.R.attr#backgroundTint and androidx.appcompat.R.attr#backgroundTintMode. Allows dynamic tint of its image via the image tint methods in `ImageViewCompat`. Allows setting of the image tint using androidx.appcompat.R.attr#tint and androidx.appcompat.R.attr#tintMode.
AppCompatMultiAutoCompleteTextView	A `MultiAutoCompleteTextView` which supports compatible features on older version of the platform, including: Supports R.attr#textAllCaps style attribute which works back to `Gingerbread`. Allows dynamic tint of its background via the background tint methods in `androidx.core.view.ViewCompat`. Allows setting of the background tint using R.attr#backgroundTint and R.attr#backgroundTintMode.
AppCompatRadioButton	A `RadioButton` which supports compatible features on older versions of the platform, including: Allows dynamic tint of its background via the background tint methods in `androidx.core.widget.CompoundButtonCompat`. Allows setting of the background tint using R.attr#buttonTint and R.attr#buttonTintMode.
AppCompatRatingBar	A `RatingBar` which supports compatible features on older versions of the platform.
AppCompatResources	Class for accessing an application's resources through AppCompat, and thus any backward compatible functionality.
AppCompatSeekBar	A `SeekBar` which supports compatible features on older versions of the platform.
AppCompatSpinner	A `Spinner` which supports compatible features on older versions of the platform, including: Allows dynamic tint of its background via the background tint methods in `androidx.core.view.ViewCompat`. Allows setting of the background tint using R.attr#buttonTint and R.attr#buttonTintMode. Setting the popup theme using R.attr#popupTheme.
AppCompatTextView	A `TextView` which supports compatible features on older versions of the platform, including: Allows dynamic tint of its background via the background tint methods in `androidx.core.view.ViewCompat`. Allows setting of the background tint using androidx.appcompat.R.attr#backgroundTint and androidx.appcompat.R.attr#backgroundTintMode. Supports auto-sizing via `androidx.core.widget.TextViewCompat` by allowing to instruct a `TextView` to let the size of the text expand or contract automatically to fill its layout based on the TextView's characteristics and boundaries. The style attributes associated with auto-sizing are androidx.appcompat.R.attr#autoSizeTextType, androidx.appcompat.R.attr#autoSizeMinTextSize, androidx.appcompat.R.attr#autoSizeMaxTextSize, androidx.appcompat.R.attr#autoSizeStepGranularity and androidx.appcompat.R.attr#autoSizePresetSizes, all of which work back to `Ice Cream Sandwich`.
AppCompatToggleButton	A `ToggleButton` which supports compatible features on older versions of the platform, including: Allows setting of the font family using `android.R.attr#fontFamily`
AppCompatViewInflater	This class is responsible for manually inflating our tinted widgets.
AppComponentFactory	Version of `android.app.AppComponentFactory` that works with androidx libraries.
AppLaunchChecker	This class provides APIs for determining how an app has been launched.
AppOpsManagerCompat	Helper for accessing features in `android.app.AppOpsManager`.
AppWidgetProviderWithCallbacks	Version of `AppWidgetProvider` that implements a `CallbackReceiver`.
ArcMotion	A PathMotion that generates a curved path along an arc on an imaginary circle containing the two points.
ArrayCreatingInputMerger	An `InputMerger` that attempts to merge the inputs, creating arrays when necessary.
ArrayMap	ArrayMap is a generic key->value mapping data structure that is designed to be more memory efficient than a traditional `java.util.HashMap`, this implementation is a version of the platform's `android.util.ArrayMap` that can be used on older versions of the platform.
ArrayObjectAdapter	An `ObjectAdapter` implemented with an `ArrayList`.
ArrayRes	Denotes that an integer parameter, field or method return value is expected to be an array resource reference (e.g.
ArraySet	ArraySet is a generic set data structure that is designed to be more memory efficient than a traditional `java.util.HashSet`.
AspectRatio	The aspect ratio of the use case.
AsyncDifferConfig	Configuration object for `ListAdapter`, `AsyncListDiffer`, and similar background-thread list diffing adapter logic.
AsyncDifferConfig.Builder	Builder class for `AsyncDifferConfig`.
AsyncLayoutInflater	Helper class for inflating layouts asynchronously.
AsyncLayoutInflater.OnInflateFinishedListener
AsyncListDiffer	Helper for computing the difference between two lists via `DiffUtil` on a background thread.
AsyncListDiffer.ListListener	Listener for when the current List is updated.
AsyncListUtil	A utility class that supports asynchronous content loading.
AsyncListUtil.DataCallback	The callback that provides data access for `AsyncListUtil`.
AsyncListUtil.ViewCallback	The callback that links `AsyncListUtil` with the list view.
AsyncPagedListDiffer	Helper object for mapping a `PagedList` into a `RecyclerView.Adapter`.
AsyncPagedListDiffer.PagedListListener	Listener for when the current PagedList is updated.
AsyncTaskLoader	Static library support version of the framework's `android.content.AsyncTaskLoader`.
AtomicFile	Static library support version of the framework's `android.util.AtomicFile`, a helper class for performing atomic operations on a file by creating a backup file until a write has successfully completed.
AttrRes	Denotes that an integer parameter, field or method return value is expected to be an attribute reference (e.g.
AudioAttributesCompat	A class to encapsulate a collection of attributes describing information about an audio stream.
AudioAttributesCompat.Builder	Builder class for `AudioAttributesCompat` objects.
AudioFocusRequestCompat	Compatibility version of an `AudioFocusRequest`.
AudioFocusRequestCompat.Builder	Builder class for `AudioFocusRequestCompat` objects.
AudioManagerCompat	Compatibility library for `AudioManager` with fallbacks for older platforms.
AutoImageCaptureExtender	Load the OEM extension implementation for auto effect type.
AutoPreviewExtender	Load the OEM extension Preview implementation for auto effect type.
AutoScrollHelper	AutoScrollHelper is a utility class for adding automatic edge-triggered scrolling to Views.
AutoTransition	Utility class for creating a default transition that automatically fades, moves, and resizes views during a scene change.

B

BackgroundManager	Supports background image continuity between multiple Activities.
BackoffPolicy	An enumeration of backoff policies when retrying work.
BandPredicate	Provides a means of controlling when and where band selection can be initiated.
BandPredicate.EmptyArea	A BandPredicate that allows initiation of band selection only in areas of RecyclerView that map to `RecyclerView#NO_POSITION`.
BandPredicate.NonDraggableArea	A BandPredicate that allows initiation of band selection in any area that is not draggable as determined by consulting `ItemDetailsLookup.ItemDetails#inDragRegion(MotionEvent)`.
BaseCardView	A card style layout that responds to certain state changes.
BaseCardView.LayoutParams	Per-child layout information associated with BaseCardView.
BaseFragment	Base class for leanback Fragments.
BaseGridView	An abstract base class for vertically and horizontally scrolling lists.
BaseGridView.OnKeyInterceptListener	Listener for intercepting key dispatch events.
BaseGridView.OnLayoutCompletedListener	Interface for receiving notification when BaseGridView has completed a full layout calculation.
BaseGridView.OnMotionInterceptListener	Listener for intercepting generic motion dispatch events.
BaseGridView.OnTouchInterceptListener	Listener for intercepting touch dispatch events.
BaseGridView.OnUnhandledKeyListener
BaseGridView.SmoothScrollByBehavior	Defines behavior of duration and interpolator for smoothScrollBy().
BaseLeanbackPreferenceFragment	This fragment provides a preference fragment with leanback-style behavior, suitable for embedding into broader UI elements.
BaseLeanbackPreferenceFragmentCompat	This fragment provides a preference fragment with leanback-style behavior, suitable for embedding into broader UI elements.
BaseOnItemViewClickedListener	Interface for receiving notification when an item view holder is clicked.
BaseOnItemViewSelectedListener	Interface for receiving notification when a row or item becomes selected.
BaseSupportFragment	Base class for leanback Fragments.
BatchingListUpdateCallback	Wraps a `ListUpdateCallback` callback and batches operations that can be merged.
BeautyImageCaptureExtender	Load the OEM extension implementation for beauty effect type.
BeautyPreviewExtender	Load the OEM extension Preview implementation for beauty effect type.
BenchmarkRule	JUnit rule for benchmarking code on an Android device.
BenchmarkRule.Scope	Handle used for controlling timing during measureRepeated.
BenchmarkState	Control object for benchmarking in the code in Java.
BenchmarkState.ExperimentalExternalReport
BidiFormatter	Utility class for formatting text for display in a potentially opposite-directionality context without garbling.
BidiFormatter.Builder	A class for building a BidiFormatter with non-default options.
BinderThread	Denotes that the annotated method should only be called on the binder thread.
BiometricManager	A class that contains biometric utilities.
BiometricPrompt	A class that manages a system-provided biometric prompt.
BiometricPrompt.AuthenticationCallback	Callback structure provided to `BiometricPrompt`.
BiometricPrompt.AuthenticationResult	Container for callback data from `authenticate(PromptInfo)` and `authenticate(PromptInfo, CryptoObject)`.
BiometricPrompt.CryptoObject	A wrapper class for the crypto objects supported by BiometricPrompt.
BiometricPrompt.PromptInfo	A class that contains a builder which returns the `PromptInfo` to be used in `authenticate(PromptInfo, CryptoObject)` and `authenticate(PromptInfo)`.
BiometricPrompt.PromptInfo.Builder	A builder that collects arguments to be shown on the system-provided biometric dialog.
BitmapCompat	Helper for accessing features in `android.graphics.Bitmap`.
BlendModeColorFilterCompat	Helper for accessing ColorFilter APIs on various API levels of the platform
BlendModeCompat	Compat version of `android.graphics.BlendMode`, usages of `BlendModeCompat` will map to `android.graphics.PorterDuff.Mode` wherever possible
BokehImageCaptureExtender	Loads the OEM extension implementation for bokeh effect type.
BokehPreviewExtender	Load the OEM extension Preview implementation for bokeh effect type.
BoolRes	Denotes that an integer parameter, field or method return value is expected to be a boolean resource reference.
BoundaryInterfaceReflectionUtil	A set of utility methods used for calling across the support library boundary.
BoundsRule	This class contains the rules for updating the bounds of a `CompositeDrawable.ChildDrawable`.
BoundsRule.ValueRule	This class represents individual rules for updating the bounds.
BoxInsetLayout	BoxInsetLayout is a screen shape-aware ViewGroup that can box its children in the center square of a round screen by using the `boxedEdges` attribute.
BoxInsetLayout.LayoutParams	Per-child layout information for layouts that support margins, gravity and boxedEdges.
BrandedFragment	Fragment class for managing search and branding using a view that implements `TitleViewAdapter.Provider`.
BrandedSupportFragment	Fragment class for managing search and branding using a view that implements `TitleViewAdapter.Provider`.
BroadcastReceiverWithCallbacks	Extend this broadcast receiver to be able to receive callbacks as well as normal broadcasts.
BrowseFragment	A fragment for creating Leanback browse screens.
BrowseFragment.BrowseTransitionListener	Listener for transitions between browse headers and rows.
BrowseFragment.FragmentFactory	Factory class responsible for creating fragment given the current item.
BrowseFragment.FragmentHost	Possible set of actions that `BrowseFragment` exposes to clients.
BrowseFragment.ListRowFragmentFactory	FragmentFactory implementation for `ListRow`.
BrowseFragment.MainFragmentAdapter	Interface that defines the interaction between `BrowseFragment` and its main content fragment.
BrowseFragment.MainFragmentAdapterProvider	Interface to be implemented by all fragments for providing an instance of `MainFragmentAdapter`.
BrowseFragment.MainFragmentAdapterRegistry	Registry class maintaining the mapping of `Row` subclasses to `FragmentFactory`.
BrowseFragment.MainFragmentRowsAdapter	This is used to pass information to `RowsFragment` or its subclasses.
BrowseFragment.MainFragmentRowsAdapterProvider	Interface to be implemented by `RowsFragment` and its subclasses for providing an instance of `MainFragmentRowsAdapter`.
BrowseFrameLayout	A ViewGroup for managing focus behavior between overlapping views.
BrowseFrameLayout.OnChildFocusListener	Interface for managing child focus in a BrowseFrameLayout.
BrowseFrameLayout.OnFocusSearchListener	Interface for selecting a focused view in a BrowseFrameLayout when the system focus finder couldn't find a view to focus.
BrowserActionItem	A wrapper class holding custom item of Browser Actions menu.
BrowserActionsIntent	Class holding the `Intent` and start bundle for a Browser Actions Activity.
BrowserActionsIntent.Builder	Builder class for opening a Browser Actions context menu.
BrowseSupportFragment	A fragment for creating Leanback browse screens.
BrowseSupportFragment.BrowseTransitionListener	Listener for transitions between browse headers and rows.
BrowseSupportFragment.FragmentFactory	Factory class responsible for creating fragment given the current item.
BrowseSupportFragment.FragmentHost	Possible set of actions that `BrowseSupportFragment` exposes to clients.
BrowseSupportFragment.ListRowFragmentFactory	FragmentFactory implementation for `ListRow`.
BrowseSupportFragment.MainFragmentAdapter	Interface that defines the interaction between `BrowseSupportFragment` and its main content fragment.
BrowseSupportFragment.MainFragmentAdapterProvider	Interface to be implemented by all fragments for providing an instance of `MainFragmentAdapter`.
BrowseSupportFragment.MainFragmentAdapterRegistry	Registry class maintaining the mapping of `Row` subclasses to `FragmentFactory`.
BrowseSupportFragment.MainFragmentRowsAdapter	This is used to pass information to `RowsSupportFragment` or its subclasses.
BrowseSupportFragment.MainFragmentRowsAdapterProvider	Interface to be implemented by `RowsSupportFragment` and its subclasses for providing an instance of `MainFragmentRowsAdapter`.
BuildCompat	This class contains additional platform version checking methods for targeting pre-release versions of Android.
BundleCompat	Helper for accessing features in `Bundle`.
BundledEmojiCompatConfig	`EmojiCompat.Config` implementation that loads the metadata using AssetManager and bundled resources.

C

CallableMethod
CallbackHandlerRegistry	The holder for callbacks that are tagged with `RemoteCallable`.
CallbackHandlerRegistry.CallbackHandler	The interface used to trigger a callback when the pending intent is fired.
CallbackMediaItem	Structure for media item descriptor for `DataSourceCallback`.
CallbackMediaItem.Builder	This Builder class simplifies the creation of a `CallbackMediaItem` object.
CallbackReceiver	An objects that can receive remote callbacks.
CallbackReceiver	Holder class that is created for each class instance that is a CallbackReceiver and has methods tagged with @RemoteCallable.
CallbackToFutureAdapter	A utility useful for adapting interfaces that take callbacks into interfaces that return .
CallbackToFutureAdapter.Completer	Used to complete the future returned by `getFuture`
CallbackToFutureAdapter.Resolver	This interface should be implemented by the object passed into `getFuture(Resolver)`.
CallSuper	Denotes that any overriding methods should invoke this method as well.
Camera	The camera interface is used to control the flow of data to use cases, control the camera via the `CameraControl`, and publish the state of the camera via `CameraInfo`.
Camera2CameraCaptureResult	The camera2 implementation for the capture result of a single image capture.
Camera2CameraFactory	The factory class that creates `Camera2CameraImpl` instances.
Camera2CameraInfo	Provides ability to extract Camera2-related camera information from `CameraInfo`.
Camera2CameraInfoImpl	Implementation of the `CameraInfoInternal` interface that exposes parameters through camera2.
Camera2CaptureCallbacks	Different implementations of `CameraCaptureSession.CaptureCallback`.
Camera2Config	Convenience class for generating a pre-populated Camera2 `CameraXConfig`.
Camera2DeviceSurfaceManager	Camera device manager to provide the guaranteed supported stream capabilities related info for all camera devices
Camera2Interop	Utilities related to interoperability with the `android.hardware.camera2` APIs.
Camera2Interop.Extender	Extends a `ExtendableBuilder` to add Camera2 options.
CameraCaptureResultImageInfo	An ImageInfo that is created by a `CameraCaptureResult`.
CameraCaptureSessionCompat	Helper for accessing features in `CameraCaptureSession` in a backwards compatible fashion.
CameraCaptureSessionStateCallbacks	Different implementations of `CameraCaptureSession.StateCallback`.
CameraControl	The `CameraControl` provides various asynchronous operations like zoom, focus and metering which affects output of all `UseCase`s currently bound to that camera.
CameraControl.OperationCanceledException	An exception representing a failure that the operation is canceled which might be caused by a new value is set or camera is closed.
CameraDeviceCompat	Helper for accessing features in `CameraDevice` in a backwards compatible fashion.
CameraDeviceStateCallbacks	Different implementations of `CameraDevice.StateCallback`.
CameraInfo	An interface for retrieving camera information.
CameraInfoUnavailableException	An exception thrown when unable to retrieve information about a camera.
CameraManagerCompat	Helper for accessing features in `CameraManager` in a backwards compatible fashion.
CameraSelector	A set of requirements and priorities used to select a camera.
CameraSelector.Builder	Builder for a `CameraSelector`.
CameraView	A `View` that displays a preview of the camera with methods , `takePicture(File, Executor, OnImageSavedCallback)`, `startRecording(File, Executor, OnVideoSavedCallback)` and `stopRecording()`.
CameraView.CaptureMode	The capture mode used by CameraView.
CameraView.ScaleType	Options for scaling the bounds of the view finder to the bounds of this view.
CameraXConfig	A configuration for adding implementation and user-specific behavior to CameraX.
CameraXConfig.Builder	A builder for generating `CameraXConfig` objects.
CameraXConfig.Provider	An interface which can be implemented to provide the configuration for CameraX.
CancellationSignal	Static library support version of the framework's `android.os.CancellationSignal`.
CancellationSignal.OnCancelListener	Listens for cancellation.
CarAlertDialog	A subclass of `Dialog` that is tailored for the car environment.
CarAlertDialog.Builder	Builder class that can be used to create a `CarAlertDialog` by configuring the options for what shows up in the resulting dialog.
CarDrawerAdapter	Base adapter for displaying items in the car navigation drawer, which uses a `PagedListView`.
CarDrawerController	A controller that will handle the set up of the navigation drawer.
CardView	A FrameLayout with a rounded corner background and shadow.
CarListDialog	A subclass of `Dialog` that is tailored for the car environment.
CarListDialog.Builder	Builder class that can be used to create a `CarListDialog` by configuring the options for the list and behavior of the dialog.
CarListDialog.DialogSubSection	A struct that holds data for a section.
CarMenuItem	Class to build a `CarMenuItem` that appears in the `CarToolbar` menu.
CarMenuItem.Builder	Builder for creating a `CarMenuItem`
CarMenuItem.DisplayBehavior	Display behaviors for `CarMenuItem`s.
CarMenuItem.OnClickListener	Interface definition for a callback to be invoked when a `CarMenuItem` is clicked.
CarToolbar	A toolbar for building car applications.
CarUxRestrictions	Car UX Restrictions event.
CarUxRestrictions.Builder	Builder class for `CarUxRestrictions`
CarUxRestrictionsHelper	Helps registering `OnUxRestrictionsChangedListener` and managing car connection.
CellBuilderDsl	Helper class annotated with @SliceMarker, which is annotated with @DslMarker.
ChangeBounds	This transition captures the layout bounds of target views before and after the scene change and animates those changes during the transition.
ChangeClipBounds	ChangeClipBounds captures the `android.view.View#getClipBounds()` before and after the scene change and animates those changes during the transition.
ChangeImageTransform	This Transition captures an ImageView's matrix before and after the scene change and animates it during the transition.
ChangeScroll	This transition captures the scroll properties of targets before and after the scene change and animates any changes.
ChangeTransform	This Transition captures scale and rotation for Views before and after the scene change and animates those changes during the transition.
Channel	A convenience class to access `TvContractCompat.Channels` entries in the system content provider.
Channel.Builder	The builder class that makes it easy to chain setters to create a `Channel` object.
ChannelLogoUtils	A utility class for conveniently storing and loading channel logos.
CheckBoxPreference	A `Preference` that provides checkbox widget functionality.
CheckResult	Denotes that the annotated method returns a result that it typically is an error to ignore.
CircularArray	CircularArray is a generic circular array data structure that provides O(1) random read, O(1) prepend and O(1) append.
CircularIntArray	CircularIntArray is a circular integer array data structure that provides O(1) random read, O(1) prepend and O(1) append.
CircularProgressDrawable	Drawable that renders the animated indeterminate progress indicator in the Material design style without depending on API level 11.
CircularProgressLayout	`CircularProgressLayout` adds a circular countdown timer behind the view it contains, typically used to automatically confirm an operation after a short delay has elapsed.
CircularProgressLayout.OnTimerFinishedListener	Interface to implement for listening to event.
CircularPropagation	A propagation that varies with the distance to the epicenter of the Transition or center of the scene if no epicenter exists.
ClassPresenterSelector	A ClassPresenterSelector selects a `Presenter` based on the item's Java class.
CollapsibleActionView	When a `android.view.View` implements this interface it will receive callbacks when expanded or collapsed as an action view alongside the optional, app-specified callbacks to `androidx.core.view.MenuItemCompat.OnActionExpandListener`.
ColorFilterCache	Cache of `ColorFilter`s for a given color at different alpha levels.
ColorFilterDimmer	Helper class for applying a dim level to a View.
ColorInt	Denotes that the annotated element represents a packed color int, `AARRGGBB`.
ColorLong	Denotes that the annotated element represents a packed color long.
ColorOverlayDimmer	Helper class for assigning a dim color to Paint.
ColorRes	Denotes that an integer parameter, field or method return value is expected to be a color resource reference (e.g.
ColorUtils	A set of color-related utility methods, building upon those available in `Color`.
ColumnCalculator	Utility class that calculates the width of the columns that will fit on the screen.
ColumnCardView	A `CardView` whose width can be specified by the number of columns that it will span.
ColumnInfo	Allows specific customization about the column associated with this field.
ColumnInfo.Collate
ColumnInfo.SQLiteTypeAffinity	The SQLite column type constants that can be used in `typeAffinity()`
ComponentActivity	Base class for activities that enables composition of higher level components.
CompositeDrawable	Generic drawable class that can be composed of multiple children.
CompositeDrawable.ChildDrawable	Wrapper class holding a drawable object and `BoundsRule` to update drawable bounds when parent bound changes.
CompositePageTransformer	Allows for combining multiple `PageTransformer` objects.
CompoundButtonCompat	Helper for accessing `android.widget.CompoundButton`.
Configuration	The Configuration object used to customize `WorkManager` upon initialization.
Configuration.Builder	A Builder for `Configuration`s.
Configuration.Provider	A class that can provide the `Configuration` for WorkManager and allow for on-demand initialization of WorkManager.
ConfigurationCompat	Helper class which allows access to properties of `Configuration` in a backward compatible fashion.
ConfigurationHelper	Helper class which allows access to properties of `Configuration` in a backward compatible fashion.
ConfirmationActivity	This Activity is used to display confirmation animations after the user completes an action on the wearable.
ConfirmationOverlay	Displays a full-screen confirmation animation with optional text and then hides it.
ConfirmationOverlay.OnAnimationFinishedListener	Interface for listeners to be notified when the `ConfirmationOverlay` animation has finished and its `View` has been removed.
ConfirmationOverlay.OverlayType	Types of animations to display in the overlay.
ConnectivityManagerCompat	Helper for accessing features in `ConnectivityManager`.
Constraints	A specification of the requirements that need to be met before a `WorkRequest` can run.
Constraints.Builder	A Builder for a `Constraints` object.
Consumer	Compat version of `java.util.function.Consumer`
ContentLoadingProgressBar	ContentLoadingProgressBar implements a ProgressBar that waits a minimum time to be dismissed before showing.
ContentPager	`ContentPager` provides support for loading "paged" data on a background thread using the `ContentResolver` framework.
ContentPager.ContentCallback	Callback by which a client receives results of a query.
ContentPager.CursorDisposition
ContentPager.QueryRunner	Implementations of this interface provide the mechanism for execution of queries off the UI thread.
ContentPager.QueryRunner.Callback	Callback that receives a cursor once a query as been executed on the Runner.
ContentProviderWithCallbacks	Version of ContentProvider that can be used as a `CallbackReceiver`.
ContentRecommendation	The ContentRecommendation object encapsulates all application provided data for a single content recommendation item.
ContentRecommendation.Builder	Builder class for `ContentRecommendation` objects.
ContentRecommendation.ContentMaturity
ContentRecommendation.ContentPricing
ContentRecommendation.ContentStatus
ContentRecommendation.ContentType
ContentRecommendation.IntentData	Object used to encapsulate the data to be used to build the `PendingIntent` object associated with a given content recommendation, at the time this recommendation gets posted to the home Screen.
ContentRecommendation.IntentType
ContentResolverCompat	Helper for accessing features in `android.content.ContentResolver` in a backwards compatible fashion.
ContentView	Annotation that can be attached to a constructor with a single `LayoutRes` parameter to denote what layout the component intends to inflate and set as its content.
ContextCompat	Helper for accessing features in `android.content.Context`.
ContextThemeWrapper	A context wrapper that allows you to modify or replace the theme of the wrapped context.
ControlButtonPresenterSelector	Displays primary and secondary controls for a `PlaybackControlsRow`.
ConversationAction	Represents an action suggested by a `TextClassifier` on a given conversation.
ConversationAction.Builder	Builder class to construct `ConversationAction`.
ConversationActions	Represents a list of actions suggested by a `TextClassifier` on a given conversation.
ConversationActions.Message	Represents a message in the conversation.
ConversationActions.Message.Builder	Builder class to construct a `Message`
ConversationActions.Request	A request object for generating conversation action suggestions.
ConversationActions.Request.Builder	Builder object to construct the `Request` object.
CoordinatorLayout	CoordinatorLayout is a super-powered `FrameLayout`.
CoordinatorLayout.AttachedBehavior	Defines the default attached `Behavior` of a `View` class
CoordinatorLayout.Behavior	Interaction behavior plugin for child views of `CoordinatorLayout`.
CoordinatorLayout.DefaultBehavior	Defines the default `Behavior` of a `View` class.
CoordinatorLayout.LayoutParams	Parameters describing the desired layout for a child of a `CoordinatorLayout`.
CoordinatorLayout.SavedState
CoroutinesRoom	A helper class for supporting Kotlin Coroutines in Room.
CoroutineWorker	A ListenableWorker implementation that provides interop with Kotlin Coroutines.
CountingTaskExecutorRule	A JUnit Test Rule that swaps the background executor used by the Architecture Components with a different one which counts the tasks as they are start and finish.
CursorAdapter	Static library support version of the framework's `android.widget.CursorAdapter`.
CursorLoader	Static library support version of the framework's `android.content.CursorLoader`.
CursorMapper	Abstract class used to convert the current `Cursor` row to a single object.
CursorObjectAdapter	An `ObjectAdapter` implemented with a `Cursor`.
CursorWindowCompat	Helper for accessing features in `android.database.CursorWindow`
CurvingLayoutCallback	An implementation of the `WearableLinearLayoutManager.LayoutCallback` aligning the children of the associated `WearableRecyclerView` along a pre-defined vertical curve.
CustomTabColorSchemeParams	Contains visual parameters of a Custom Tab that may depend on the color scheme.
CustomTabColorSchemeParams.Builder	Builder class for `CustomTabColorSchemeParams` objects.
CustomTabsCallback	A callback class for custom tabs client to get messages regarding events in their custom tabs.
CustomTabsClient	Class to communicate with a `CustomTabsService` and create `CustomTabsSession` from it.
CustomTabsIntent	Class holding the `Intent` and start bundle for a Custom Tabs Activity.
CustomTabsIntent.Builder	Builder class for `CustomTabsIntent` objects.
CustomTabsService	Abstract service class for implementing Custom Tabs related functionality.
CustomTabsService.Relation
CustomTabsService.Result
CustomTabsServiceConnection	Abstract `ServiceConnection` to use while binding to a `CustomTabsService`.
CustomTabsSession	A class to be used for Custom Tabs related communication.
CustomTabsSessionToken	Wrapper class that can be used as a unique identifier for a session.

D

Dao	Marks the class as a Data Access Object.
Data	A persistable set of key/value pairs which are used as inputs and outputs for `ListenableWorker`s.
Data.Builder	A builder for `Data` objects.
Database	Marks a class as a RoomDatabase.
DatabaseConfiguration	Configuration class for a `RoomDatabase`.
DatabaseUtilsCompat	Helper for accessing features in `android.database.DatabaseUtils`.
DatabaseView	Marks a class as an SQLite view.
DataSource	Base class for loading pages of snapshot data into a `PagedList`
DataSource.Factory	Factory for DataSources.
DataSource.InvalidatedCallback	Invalidation callback for DataSource.
DataSourceCallback	For supplying media data, implement this if your app has special requirements for the way media data is obtained.
DatePicker	`DatePicker` is a directly subclass of `Picker`.
DefaultItemAnimator	This implementation of `RecyclerView.ItemAnimator` provides basic animations on remove, add, and move events that happen to the items in a RecyclerView.
DefaultLifecycleObserver	Callback interface for listening to `LifecycleOwner` state changes.
DelegatingWorkerFactory	A `WorkerFactory` which delegates to other factories.
Delete	Marks a method in a `Dao` annotated class as a delete method.
DetailsFragment	A fragment for creating Leanback details screens.
DetailsFragmentBackgroundController	Controller for DetailsFragment parallax background and embedded video play.
DetailsOverviewLogoPresenter	Presenter that responsible to create a ImageView and bind to DetailsOverviewRow.
DetailsOverviewLogoPresenter.ViewHolder	ViewHolder for Logo view of DetailsOverviewRow.
DetailsOverviewRow	An overview `Row` for a details fragment.
DetailsOverviewRow.Listener	Listener for changes of DetailsOverviewRow.
DetailsOverviewRowPresenter	Renders a `DetailsOverviewRow` to display an overview of an item.
DetailsOverviewRowPresenter.ViewHolder	A ViewHolder for the DetailsOverviewRow.
DetailsParallax	Subclass of Parallax object that tracks overview row's top and bottom edge in DetailsFragment or DetailsSupportFragment.
DetailsSupportFragment	A fragment for creating Leanback details screens.
DetailsSupportFragmentBackgroundController	Controller for DetailsSupportFragment parallax background and embedded video play.
DialogCompat	Helper for accessing features in `android.app.Dialog` in a backwards compatible fashion.
DialogFragment	Static library support version of the framework's `android.app.DialogFragment`.
DialogFragmentNavigator	Navigator that uses `DialogFragment#show(FragmentManager, String)`.
DialogFragmentNavigator.Destination	NavDestination specific to `DialogFragmentNavigator`.
DialogFragmentNavigatorDestinationBuilder	DSL for constructing a new DialogFragmentNavigator.Destination
DialogPreference	A base class for `Preference`s that are dialog-based.
DialogPreference.TargetFragment	Interface for `PreferenceFragmentCompat`s to implement to allow `DialogPreference`s to find the preference that launched the dialog.
DiffCallback	Callback that informs `ArrayObjectAdapter` how to compute list updates when using `DiffUtil` in `ArrayObjectAdapter#setItems(List, * DiffCallback)` method.
DiffUtil	DiffUtil is a utility class that calculates the difference between two lists and outputs a list of update operations that converts the first list into the second one.
DiffUtil.Callback	A Callback class used by DiffUtil while calculating the diff between two lists.
DiffUtil.DiffResult	This class holds the information about the result of a `DiffUtil#calculateDiff(Callback, boolean)` call.
DiffUtil.ItemCallback	Callback for calculating the diff between two non-null items in a list.
DimenRes	Denotes that an integer parameter, field or method return value is expected to be a dimension resource reference (e.g.
Dimension	Denotes that an integer parameter, field or method return value is expected to represent a dimension.
DirectExecutor	A simple Executor.
DisplayCutoutCompat	Represents the area of the display that is not functional for displaying content.
DisplayManagerCompat	Helper for accessing features in `android.hardware.display.DisplayManager`.
DisplayOrientedMeteringPointFactory	A `MeteringPointFactory` that can convert a `View` (x, y) into a `MeteringPoint` which can then be used to construct a `FocusMeteringAction` to start a focus and metering action.
DividerItemDecoration	DividerItemDecoration is a `RecyclerView.ItemDecoration` that can be used as a divider between items of a `LinearLayoutManager`.
DividerPresenter	DividerPresenter provides a default presentation for `DividerRow` in HeadersFragment.
DividerRow	Used to represent divider in HeadersFragment.
DocumentFile	Representation of a document backed by either a `android.provider.DocumentsProvider` or a raw file on disk.
DragAndDropPermissionsCompat	Helper for accessing features in `android.view.DragAndDropPermissions` a backwards compatible fashion.
DragStartHelper	DragStartHelper is a utility class for implementing drag and drop support.
DragStartHelper.OnDragStartListener	Interface definition for a callback to be invoked when a drag start gesture is detected.
DrawableCompat	Helper for accessing features in `android.graphics.drawable.Drawable`.
DrawableRes	Denotes that an integer parameter, field or method return value is expected to be a drawable resource reference (e.g.
DrawerArrowDrawable	A drawable that can draw a "Drawer hamburger" menu or an arrow and animate between them.
DrawerItemViewHolder	Re-usable `RecyclerView.ViewHolder` for displaying items in the `androidx.car.drawer.CarDrawerAdapter`.
DrawerLayout	DrawerLayout acts as a top-level container for window content that allows for interactive "drawer" views to be pulled out from one or both vertical edges of the window.
DrawerLayout.DrawerListener	Listener for monitoring events about drawers.
DrawerLayout.LayoutParams
DrawerLayout.SavedState	State persisted across instances
DrawerLayout.SimpleDrawerListener	Stub/no-op implementations of all methods of `DrawerListener`.
DropDownPreference	A `ListPreference` that presents the options in a drop down menu rather than a dialog.
DynamicAnimation	This class is the base class of physics-based animations.
DynamicAnimation.OnAnimationEndListener	An animation listener that receives end notifications from an animation.
DynamicAnimation.OnAnimationUpdateListener	Implementors of this interface can add themselves as update listeners to an `DynamicAnimation` instance to receive callbacks on every animation frame, after the current frame's values have been calculated for that `DynamicAnimation`.
DynamicAnimation.ViewProperty	ViewProperty holds the access of a property of a `View`.

E

EdgeEffectCompat	Helper for accessing `android.widget.EdgeEffect`.
EditorInfoCompat	Helper for accessing features in `EditorInfo` in a backwards compatible fashion.
EditTextPreference	A `DialogPreference` that shows a `EditText` in the dialog.
EditTextPreference.OnBindEditTextListener	Interface definition for a callback to be invoked when the corresponding dialog view for this preference is bound.
EditTextPreference.SimpleSummaryProvider	A simple `androidx.preference.Preference.SummaryProvider` implementation for an `EditTextPreference`.
EditTextPreferenceDialogFragment
EditTextPreferenceDialogFragmentCompat
Embedded	Marks a field of an `Entity` or POJO to allow nested fields (i.e. fields of the annotated field's class) to be referenced directly in the SQL queries.
EmojiAppCompatButton	AppCompatButton widget enhanced with emoji capability by using `EmojiTextViewHelper`.
EmojiAppCompatEditText	AppCompatEditText widget enhanced with emoji capability by using `EmojiEditTextHelper`.
EmojiAppCompatTextView	AppCompatTextView widget enhanced with emoji capability by using `EmojiTextViewHelper`.
EmojiButton	Button widget enhanced with emoji capability by using `EmojiTextViewHelper`.
EmojiCompat	Main class to keep Android devices up to date with the newest emojis by adding `EmojiSpan`s to a given .
EmojiCompat.Config	Configuration class for EmojiCompat.
EmojiCompat.InitCallback	Listener class for the initialization of the EmojiCompat.
EmojiCompat.MetadataRepoLoader	Interface to load emoji metadata.
EmojiCompat.MetadataRepoLoaderCallback	Callback to inform EmojiCompat about the state of the metadata load.
EmojiEditText	EditText widget enhanced with emoji capability by using `EmojiEditTextHelper`.
EmojiEditTextHelper	Utility class to enhance custom EditText widgets with `EmojiCompat`.
EmojiExtractTextLayout	Layout that contains emoji compatibility enhanced ExtractEditText.
EmojiSpan	Base span class for the emoji replacement.
EmojiTextView	TextView widget enhanced with emoji capability by using `EmojiTextViewHelper`.
EmojiTextViewHelper	Utility class to enhance custom TextView widgets with `EmojiCompat`.
EmptyResultSetException	Thrown by Room when the query in a Single<T> DAO method needs to return a result but the returned result from the database is empty.
EncryptedFile	Class used to create and read encrypted files.
EncryptedFile.Builder	Builder class to configure EncryptedFile
EncryptedFile.FileEncryptionScheme	The encryption scheme to encrypt files.
EncryptedSharedPreferences	An implementation of `SharedPreferences` that encrypts keys and values.
EncryptedSharedPreferences.PrefKeyEncryptionScheme	The encryption scheme to encrypt keys.
EncryptedSharedPreferences.PrefValueEncryptionScheme	The encryption scheme to encrypt values.
Entity	Marks a class as an entity.
EnvironmentCompat	Helper for accessing features in `Environment`.
ErrorFragment	A fragment for displaying an error indication.
ErrorSupportFragment	A fragment for displaying an error indication.
EventInfo	Represents information associated with a logged event on `SliceView`.
ExifInterface	This is a class for reading and writing Exif tags in various image file formats.
ExistingPeriodicWorkPolicy	An enumeration of the conflict resolution policies available to unique `PeriodicWorkRequest`s in case of a collision.
ExistingWorkPolicy	An enumeration of the conflict resolution policies available to unique `OneTimeWorkRequest`s in case of a collision.
Experimental	Denotes that the annotated element is a marker of an experimental API.
Experimental.Level	Severity of the diagnostic that should be reported on usages of experimental API which did not explicitly accept the experimental aspect of that API either by using `UseExperimental` or by being annotated with the corresponding marker annotation.
ExperimentalCamera2Interop	Denotes that the annotated method uses the experimental methods which allow direct access to camera2 classes.
ExperimentalDetector
ExperimentalGetImage	Denotes that the annotated method uses the experimental `ImageProxy#getImage()` method.
ExperimentalIssueRegistry
Explode	This transition tracks changes to the visibility of target views in the start and end scenes and moves views in or out from the edges of the scene.
ExploreByTouchHelper	ExploreByTouchHelper is a utility class for implementing accessibility support in custom `View`s that represent a collection of View-like logical items.
ExtendableBuilder	Extendable builders are used to add externally defined options that can be passed to the implementation being built.
ExtensionCameraIdFilter	Filter camera id by extender implementation.
ExtensionsErrorListener	Listener called when any extensions error occurs.
ExtensionsErrorListener.ExtensionsErrorCode	Types of error when extensions function is enabled.
ExtensionsManager	Provides interfaces for third party app developers to get capabilities info of extension functions.
ExtensionsManager.EffectMode	The effect mode options applied on the bound use cases
ExtensionsManager.ExtensionsAvailability
ExternalInput	Identifies parameters of an `RemoteCallable` that will be pulled from the caller of the callback.
ExtrasUtils	Utilities for inserting/retrieving data into/from textclassifier related results and intents.

F

FacetProvider	This is the query interface to supply optional features(aka facets) on an object without the need of letting the object to subclass or implement java interfaces.
FacetProviderAdapter	Optional interface that implemented by `RecyclerView.Adapter` to query `FacetProvider` for a given item view type within Adapter.
Fade	This transition tracks changes to the visibility of target views in the start and end scenes and fades views in or out when they become visible or non-visible.
FakeKeyedAppStatesReporter	A fake `KeyedAppStatesReporter` for testing.
FastOutLinearInInterpolator	Interpolator corresponding to `android.R.interpolator#fast_out_linear_in`.
FastOutSlowInInterpolator	Interpolator corresponding to `android.R.interpolator#fast_out_slow_in`.
FeatureFlagHolderBoundaryInterface	Boundary interface to be implemented by any type which is constructed on the support library side (such as callback classes).
Features	Class containing all the features the support library can support.
FileMediaItem	Structure for media item for a file.
FileMediaItem.Builder	This Builder class simplifies the creation of a `FileMediaItem` object.
FileProvider	FileProvider is a special subclass of `ContentProvider` that facilitates secure sharing of files associated with an app by creating a `content://Uri` for a file instead of a `file:///Uri`
FingerprintManagerCompat	A class that coordinates access to the fingerprint hardware.
FingerprintManagerCompat.AuthenticationCallback	Callback structure provided to `FingerprintManagerCompat#authenticate(CryptoObject, * int, CancellationSignal, AuthenticationCallback, Handler)`.
FingerprintManagerCompat.AuthenticationResult	Container for callback data from `FingerprintManagerCompat#authenticate(CryptoObject, * int, CancellationSignal, AuthenticationCallback, Handler)`.
FingerprintManagerCompat.CryptoObject	A wrapper class for the crypto objects supported by FingerprintManager.
FitWidthBitmapDrawable	Subclass of `Drawable` that can be used to draw a bitmap into a region.
FlingAnimation	Fling animation is an animation that continues an initial momentum (most often from gesture velocity) and gradually slows down.
FloatingWindow	A marker interface for `NavDestination` subclasses that float above the view of other destinations (i.e.
FloatPropertyCompat	FloatPropertyCompat is an abstraction that can be used to represent a mutable float value that is held in a host object.
FloatRange	Denotes that the annotated element should be a float or double in the given range
FloatValueHolder	FloatValueHolder holds a float value.
FocusDelegate	Override methods in this class to provide application specific behaviors related to focusing item.
FocusHighlight	Interface for highlighting the item that has focus.
FocusHighlightHelper	Sets up the highlighting behavior when an item gains focus.
FocusMeteringAction	A configuration used to trigger a focus and/or metering action.
FocusMeteringAction.Builder	The builder used to create the `FocusMeteringAction`.
FocusMeteringResult	Result of the `CameraControl#startFocusAndMetering(FocusMeteringAction)`.
FontRequest	Information about a font request that may be sent to a Font Provider.
FontRequestEmojiCompatConfig	`EmojiCompat.Config` implementation that asynchronously fetches the required font and the metadata using a `FontRequest`.
FontRequestEmojiCompatConfig.ExponentialBackoffRetryPolicy	A retry policy implementation that doubles the amount of time in between retries.
FontRequestEmojiCompatConfig.RetryPolicy	Retry policy used when the font provider is not ready to give the font file.
FontRes	Denotes that an integer parameter, field or method return value is expected to be a font resource reference (e.g.
FontsContractCompat	Utility class to deal with Font ContentProviders.
FontsContractCompat.Columns	Defines the constants used in a response from a Font Provider.
FontsContractCompat.FontFamilyResult	Object returned from `fetchFonts`.
FontsContractCompat.FontInfo	Object represent a font entry in the family returned from `fetchFonts`.
FontsContractCompat.FontRequestCallback	Interface used to receive asynchronously fetched typefaces.
ForegroundInfo	The information required when a `ListenableWorker` runs in the context of a foreground service.
ForegroundUpdater	Manages updating `android.app.Notification`s when a `ListenableWorker` transitions to running in the context of a foreground `android.app.Service`.
ForeignKey	Declares a foreign key on another `Entity`.
ForeignKey.Action	Constants definition for values that can be used in `onDelete()` and `onUpdate()`.
FractionRes	Denotes that an integer parameter, field or method return value is expected to be a fraction resource reference.
Fragment	Static library support version of the framework's `android.app.Fragment`.
Fragment.InstantiationException	Thrown by `FragmentFactory#instantiate(ClassLoader, String)` when there is an instantiation failure.
Fragment.SavedState	State information that has been retrieved from a fragment instance through `FragmentManager.saveFragmentInstanceState`.
FragmentActivity	Base class for activities that want to use the support-based `Fragments`.
FragmentAnimationProvider	FragmentAnimationProvider supplies animations for use during a fragment's onCreateAnimator callback.
FragmentContainer	Callbacks to a `Fragment`'s container.
FragmentContainerView	FragmentContainerView is a customized Layout designed specifically for Fragments.
FragmentController	Provides integration points with a `FragmentManager` for a fragment host.
FragmentFactory	Interface used to control the instantiation of `Fragment` instances.
FragmentHostCallback	Integration points with the Fragment host.
FragmentManager	Static library support version of the framework's `android.app.FragmentManager`.
FragmentManager.BackStackEntry	Representation of an entry on the fragment back stack, as created with `FragmentTransaction.addToBackStack()`.
FragmentManager.FragmentLifecycleCallbacks	Callback interface for listening to fragment state changes that happen within a given FragmentManager.
FragmentManager.OnBackStackChangedListener	Interface to watch for changes to the back stack.
FragmentManagerNonConfig	FragmentManagerNonConfig stores the retained instance fragments across activity recreation events.
FragmentNavigator	Navigator that navigates through `fragment transactions`.
FragmentNavigator.Destination	NavDestination specific to `FragmentNavigator`
FragmentNavigator.Extras	Extras that can be passed to FragmentNavigator to enable Fragment specific behavior
FragmentNavigator.Extras.Builder	Builder for constructing new `Extras` instances.
FragmentNavigatorDestinationBuilder	DSL for constructing a new FragmentNavigator.Destination
FragmentPagerAdapter	Implementation of `PagerAdapter` that represents each page as a `Fragment` that is persistently kept in the fragment manager as long as the user can return to the page.
FragmentScenario	FragmentScenario provides API to start and drive a Fragment's lifecycle state for testing.
FragmentScenario.FragmentAction	FragmentAction interface should be implemented by any class whose instances are intended to be executed by the main thread.
FragmentStateAdapter	Similar in behavior to `FragmentStatePagerAdapter`
FragmentStatePagerAdapter	Implementation of `PagerAdapter` that uses a `Fragment` to manage each page.
FragmentTabHost	Special TabHost that allows the use of `Fragment` objects for its tab content.
FragmentTransaction	Static library support version of the framework's `android.app.FragmentTransaction`.
FragmentViewHolder	`ViewHolder` implementation for handling `Fragment`s.
FrameMetricsAggregator	This class can be used to record and return data about per-frame durations.
FrameworkSQLiteOpenHelperFactory	Implements `SupportSQLiteOpenHelper.Factory` using the SQLite implementation in the framework.
Fts3	Marks an `Entity` annotated class as a FTS3 entity.
Fts4	Marks an `Entity` annotated class as a FTS4 entity.
FtsOptions	Available option values that can be used with `Fts3` & `Fts4`.
FtsOptions.MatchInfo
FtsOptions.Order
FullWidthDetailsOverviewRowPresenter	Renders a `DetailsOverviewRow` to display an overview of an item.
FullWidthDetailsOverviewRowPresenter.Listener	Listeners for events on ViewHolder.
FullWidthDetailsOverviewRowPresenter.ViewHolder	A ViewHolder for the DetailsOverviewRow.
FullWidthDetailsOverviewRowPresenter.ViewHolder.DetailsOverviewRowListener
FullWidthDetailsOverviewSharedElementHelper	Helper class to assist delayed shared element activity transition for view created by `FullWidthDetailsOverviewRowPresenter`.
Function	Represents a function.

G

GestureDetectorCompat	Detects various gestures and events using the supplied `MotionEvent`s.
GravityCompat	Compatibility shim for accessing newer functionality from `android.view.Gravity`.
GridLayout	A layout that places its children in a rectangular grid.
GridLayout.Alignment	Alignments specify where a view should be placed within a cell group and what size it should be.
GridLayout.LayoutParams	Layout information associated with each of the children of a GridLayout.
GridLayout.Spec	A Spec defines the horizontal or vertical characteristics of a group of cells.
GridLayoutManager	A `RecyclerView.LayoutManager` implementations that lays out items in a grid.
GridLayoutManager.DefaultSpanSizeLookup	Default implementation for `SpanSizeLookup`.
GridLayoutManager.LayoutParams	LayoutParams used by GridLayoutManager.
GridLayoutManager.SpanSizeLookup	A helper class to provide the number of spans each item occupies.
GridRowBuilder	Builder to construct a grid row which may be added as a row to `ListBuilder`.
GridRowBuilder.CellBuilder	Builder to construct a cell.
GridRowBuilderDsl	Helper class annotated with @SliceMarker, which is annotated with @DslMarker.
GuardedBy	Denotes that the annotated method or field can only be accessed when holding the referenced lock.
GuidanceStylist	GuidanceStylist is used within a `androidx.leanback.app.GuidedStepFragment` to display contextual information for the decision(s) required at that step.
GuidanceStylist.Guidance	A data class representing contextual information for a .
GuidedAction	A data class which represents an action within a .
GuidedAction.Builder	Builds a `GuidedAction` object.
GuidedAction.BuilderBase	Base builder class to build a `GuidedAction` object.
GuidedActionAutofillSupport	Interface for a custom EditText subclass to support autofill in `androidx.leanback.app.GuidedStepSupportFragment`.
GuidedActionAutofillSupport.OnAutofillListener	Listener for autofill event.
GuidedActionDiffCallback	DiffCallback used for GuidedActions, see .
GuidedActionEditText	A custom EditText that satisfies the IME key monitoring requirements of GuidedStepFragment.
GuidedActionsStylist	GuidedActionsStylist is used within a `androidx.leanback.app.GuidedStepFragment` to supply the right-side panel where users can take actions.
GuidedActionsStylist.ViewHolder	ViewHolder caches information about the action item layouts' subviews.
GuidedDatePickerAction	Subclass of GuidedAction that can choose a date.
GuidedDatePickerAction.Builder	Builder class to build a GuidedDatePickerAction.
GuidedDatePickerAction.BuilderBase	Base Builder class to build GuidedDatePickerAction.
GuidedStepFragment	A GuidedStepFragment is used to guide the user through a decision or series of decisions.
GuidedStepSupportFragment	A GuidedStepSupportFragment is used to guide the user through a decision or series of decisions.

H

HalfFloat	Denotes that the annotated element represents a half-precision floating point value.
HandlerCompat	Helper for accessing features in `Handler`.
HasDefaultViewModelProviderFactory	Interface that marks a `ViewModelStoreOwner` as having a default `ViewModelProvider.Factory` for use with `ViewModelProvider#ViewModelProvider(ViewModelStoreOwner)`.
HdrImageCaptureExtender	Load the OEM extension implementation for HDR effect type.
HdrPreviewExtender	Load the OEM extension Preview implementation for HDR effect type.
HeaderBuilderDsl	Helper class annotated with @SliceMarker, which is annotated with @DslMarker.
HeaderItem	A header item describes the metadata of a `Row`, such as a category of media items.
HeadersFragment	An fragment containing a list of row headers.
HeadersFragment.OnHeaderClickedListener	Interface definition for a callback to be invoked when a header item is clicked.
HeadersFragment.OnHeaderViewSelectedListener	Interface definition for a callback to be invoked when a header item is selected.
HeadersSupportFragment	An fragment containing a list of row headers.
HeadersSupportFragment.OnHeaderClickedListener	Interface definition for a callback to be invoked when a header item is clicked.
HeadersSupportFragment.OnHeaderViewSelectedListener	Interface definition for a callback to be invoked when a header item is selected.
HeartRating	A class for rating with a single degree of rating, "heart" vs "no heart".
HeifWriter	This class writes one or more still images (of the same dimensions) into a heif file.
HeifWriter.Builder	Builder class for constructing a HeifWriter object from specified parameters.
HintConstants	Contains all the officially supported autofill hint constants.
HoldingConnectionClient	A client which keeps the ServiceConnection to the `IAdvertisingIdService`.
HorizontalGridView	A `android.view.ViewGroup` that shows items in a horizontal scrolling list.
HorizontalHoverCardSwitcher	A helper class for showing a hover card view below a `HorizontalGridView`.
HtmlCompat	Backwards compatible version of `Html`.

I

IconCompat	Helper for accessing features in `android.graphics.drawable.Icon`.
ICUCompat
IdRes	Denotes that an integer parameter, field or method return value is expected to be an id resource reference (e.g.
Ignore	Ignores the marked element from Room's processing logic.
ImageAnalysis	A use case providing CPU accessible images for an app to perform image analysis on.
ImageAnalysis.Analyzer	Interface for analyzing images.
ImageAnalysis.Builder	Builder for a `ImageAnalysis`.
ImageAnalysisConfigProvider	Provides defaults for `ImageAnalysisConfig` in the Camera2 implementation.
ImageCapture	A use case for taking a picture.
ImageCapture.Builder	Builder for an `ImageCapture`.
ImageCapture.Metadata	Holder class for metadata that will be saved with captured images.
ImageCapture.OnImageCapturedCallback	Callback for when an image capture has completed.
ImageCapture.OnImageSavedCallback	Listener containing callbacks for image file I/O events.
ImageCaptureConfigProvider	Provides defaults for `ImageCaptureConfig` in the Camera2 implementation.
ImageCaptureExtender	Class for using an OEM provided extension on image capture.
ImageCardView	A subclass of `BaseCardView` with an `ImageView` as its main region.
ImageInfo	Metadata for an image.
ImageProxy	An image proxy which has a similar interface as `android.media.Image`.
ImageProxy.PlaneProxy	A plane proxy which has an analogous interface as `android.media.Image.Plane`.
ImageViewCompat	Helper for accessing features in `ImageView`.
ImeKeyMonitor	Interface for an EditText subclass that can delegate calls to onKeyPreIme up to a registered listener.
ImeKeyMonitor.ImeKeyListener	Listener interface for key events intercepted pre-IME by edit text objects.
Index	Declares an index on an Entity.
InputConfigurationCompat	Helper for accessing features in InputConfiguration in a backwards compatible fashion.
InputConnectionCompat	Helper for accessing features in `InputConnection` introduced after API level 13 in a backwards compatible fashion.
InputConnectionCompat.OnCommitContentListener	Listener for commitContent method call, in a backwards compatible fashion.
InputContentInfoCompat	Helper for accessing features in InputContentInfo introduced after API level 13 in a backwards compatible fashion.
InputDeviceCompat	Helper class for accessing values in `android.view.InputDevice`.
InputMerger	An abstract class that allows the user to define how to merge a list of inputs to a `ListenableWorker`.
InputMergerFactory	A factory object that creates `InputMerger` instances.
InputRangeBuilderDsl	Helper class annotated with @SliceMarker, which is annotated with @DslMarker.
Insert	Marks a method in a `Dao` annotated class as an insert method.
Insets	An Insets instance holds four integer offsets which describe changes to the four edges of a Rectangle.
InspectableProperty	Denotes that the annotated method is the getter for a resources-backed property that should be shown in Android Studio's inspection tools.
InspectableProperty.EnumEntry	One entry in an enumeration packed into a primitive {int}.
InspectableProperty.FlagEntry	One flag value of many that may be packed into a primitive {int}.
InspectableProperty.ValueType	The type of value packed into a primitive {int}.
InstantTaskExecutorRule	A JUnit Test Rule that swaps the background executor used by the Architecture Components with a different one which executes each task synchronously.
IntDef	Denotes that the annotated element of integer type, represents a logical type and that its value should be one of the explicitly named constants.
IntegerRes	Denotes that an integer parameter, field or method return value is expected to be an integer resource reference (e.g.
IntentCompat	Helper for accessing features in `android.content.Intent`.
InterpolatorRes	Denotes that an integer parameter, field or method return value is expected to be an interpolator resource reference (e.g.
IntRange	Denotes that the annotated element should be an int or long in the given range
InvalidationTracker	InvalidationTracker keeps a list of tables modified by queries and notifies its callbacks about these tables.
InvalidationTracker.Observer	An observer that can listen for changes in the database.
IoConfig	Configuration containing IO related options.
IoConfig.Builder	Builder for a `IoConfig`.
IsolationActivity	Simple opaque activity used to reduce benchmark interference from other windows.
IsomorphicObjectBoundaryInterface	Boundary interface to be implemented by any type that needs to maintain an isomorphism (i.e. a 1:1 mapping) between the support library objects and their corresponding internal WebView objects.
ItemAlignmentFacet	Optional facet provided by `RecyclerView.Adapter` or `RecyclerView.ViewHolder` for use in `HorizontalGridView` and `VerticalGridView`.
ItemAlignmentFacet.ItemAlignmentDef	Definition of an alignment position under a view.
ItemBridgeAdapter	Bridge from `Presenter` to `RecyclerView.Adapter`.
ItemBridgeAdapter.AdapterListener	Interface for listening to ViewHolder operations.
ItemBridgeAdapter.ViewHolder	ViewHolder for the ItemBridgeAdapter.
ItemBridgeAdapter.Wrapper	Interface for wrapping a view created by a Presenter into another view.
ItemBridgeAdapterShadowOverlayWrapper	A wrapper class working with `ItemBridgeAdapter` to wrap item view in a `ShadowOverlayContainer`.
ItemDetailsLookup	The Selection library calls `getItemDetails(MotionEvent)` when it needs access to information about the area and/or `ItemDetails` under a `MotionEvent`.
ItemDetailsLookup.ItemDetails	An ItemDetails implementation provides the selection library with access to information about a specific RecyclerView item.
ItemKeyedDataSource	Incremental data loader for paging keyed content, where loaded content uses previously loaded items as input to future loads.
ItemKeyedDataSource.LoadCallback	Callback for ItemKeyedDataSource `loadBefore(LoadParams, LoadCallback)` and `loadAfter(LoadParams, LoadCallback)` to return data.
ItemKeyedDataSource.LoadInitialCallback	Callback for `loadInitial(LoadInitialParams, LoadInitialCallback)` to return data and, optionally, position/count information.
ItemKeyedDataSource.LoadInitialParams	Holder object for inputs to `loadInitial(LoadInitialParams, LoadInitialCallback)`.
ItemKeyedDataSource.LoadParams	Holder object for inputs to `loadBefore(LoadParams, LoadCallback)` and `loadAfter(LoadParams, LoadCallback)`.
ItemKeyProvider	Provides selection library access to stable selection keys identifying items presented by a `RecyclerView` instance.
ItemKeyProvider.Scope
ItemTouchHelper	This is a utility class to add swipe to dismiss and drag & drop support to RecyclerView.
ItemTouchHelper.Callback	This class is the contract between ItemTouchHelper and your application.
ItemTouchHelper.SimpleCallback	A simple wrapper to the default Callback which you can construct with drag and swipe directions and this class will handle the flag callbacks.
ItemTouchHelper.ViewDropHandler	An interface which can be implemented by LayoutManager for better integration with `ItemTouchHelper`.
ItemTouchUIUtil	Utility class for `ItemTouchHelper` which handles item transformations for different API versions.

J

JobIntentService	Helper for processing work that has been enqueued for a job/service.
JsReplyProxyBoundaryInterface	Boundary interface for org.
Junction	Declares a junction to be used for joining a relationship.

K

Keep	Denotes that the annotated element should not be removed when the code is minified at build time.
KeyedAppState	A keyed app state to be sent to an EMM (enterprise mobility management), with the intention that it is displayed to the management organization.
KeyedAppState.KeyedAppStateBuilder	The builder for `KeyedAppState`.
KeyedAppStatesReporter	A reporter of keyed app states to enable communication between an app and an EMM (enterprise mobility management).
KeyedAppStatesService	Base service for receiving app states in Device Owner and Profile Owner apps.

L

LayoutInflaterCompat	Helper for accessing features in `LayoutInflater`.
LayoutInflaterFactory	Used with `LayoutInflaterCompat.setFactory()`.
LayoutRes	Denotes that an integer parameter, field or method return value is expected to be a layout resource reference (e.g.
LeanbackEditTextPreferenceDialogFragmentCompat	Implemented a dialog to input text.
LeanbackListPreferenceDialogFragment
LeanbackListPreferenceDialogFragment.AdapterMulti	Adapter for multiple choices.
LeanbackListPreferenceDialogFragment.AdapterSingle	Adapter for single choice.
LeanbackListPreferenceDialogFragment.ViewHolder	ViewHolder of the List.
LeanbackListPreferenceDialogFragment.ViewHolder.OnItemClickListener
LeanbackListPreferenceDialogFragmentCompat	Implemented a dialog to show `ListPreference` or `MultiSelectListPreference`.
LeanbackListPreferenceDialogFragmentCompat.ViewHolder	ViewHolder for each Item in the List.
LeanbackPreferenceDialogFragment
LeanbackPreferenceDialogFragmentCompat	A fragment that shows `DialogPreference`, for example or `androidx.preference.MultiSelectListPreference`.
LeanbackPreferenceFragment	This fragment provides a fully decorated leanback-style preference fragment, including a list background and header.
LeanbackPreferenceFragmentCompat	This fragment provides a fully decorated leanback-style preference fragment, including a list background and header.
LeanbackSettingsFragment	This fragment provides a container for displaying a `LeanbackPreferenceFragment`
LeanbackSettingsFragmentCompat	This fragment provides a container for displaying a `LeanbackPreferenceFragmentCompat`
LibraryResult	Result class to be used with `ListenableFuture` for asynchronous calls between `MediaLibraryService.MediaLibrarySession` and `MediaBrowser`.
Lifecycle	Defines an object that has an Android Lifecycle.
Lifecycle.Event
Lifecycle.State	Lifecycle states.
LifecycleCameraProvider	Provides access to a camera which has has its opening and closing controlled by a `LifecycleOwner`.
LifecycleCoroutineScope	CoroutineScope tied to a Lifecycle and Dispatchers.Main.immediate
LifecycleEventObserver	Class that can receive any lifecycle change and dispatch it to the receiver.
LifecycleObserver	Marks a class as a LifecycleObserver.
LifecycleOwner	A class that has an Android lifecycle.
LifecycleRegistry	An implementation of `Lifecycle` that can handle multiple observers.
LifecycleRegistryOwner
LifecycleService	A Service that is also a `LifecycleOwner`.
LinearLayoutCompat	A Layout that arranges its children in a single column or a single row.
LinearLayoutCompat.LayoutParams	Per-child layout information associated with ViewLinearLayout.
LinearLayoutManager	A `RecyclerView.LayoutManager` implementation which provides similar functionality to `android.widget.ListView`.
LinearLayoutManager.LayoutChunkResult
LinearOutSlowInInterpolator	Interpolator corresponding to `android.R.interpolator#linear_out_slow_in`.
LinearSmoothScroller	`RecyclerView.SmoothScroller` implementation which uses a `LinearInterpolator` until the target position becomes a child of the RecyclerView and then uses a `DecelerateInterpolator` to slowly approach to target position.
LinearSnapHelper	Implementation of the `SnapHelper` supporting snapping in either vertical or horizontal orientation.
LinkifyCompat	LinkifyCompat brings in `Linkify` improvements for URLs and email addresses to older API levels.
ListAdapter	`RecyclerView.Adapter` base class for presenting List data in a `RecyclerView`, including computing diffs between Lists on a background thread.
ListBuilder	Builder for constructing slices composed of rows of content.
ListBuilder.HeaderBuilder	Builder to construct a header row.
ListBuilder.InputRangeBuilder	Builder to construct a input range row.
ListBuilder.RangeBuilder	Builder to construct a range row which can be added to a `ListBuilder`.
ListBuilder.RowBuilder	Builder to construct a row.
ListBuilderDsl	Helper class annotated with @SliceMarker, which is annotated with @DslMarker.
ListenableWorker	A class that can perform work asynchronously in `WorkManager`.
ListenableWorker.Result	The result of a `ListenableWorker`'s computation.
ListFragment	Static library support version of the framework's `android.app.ListFragment`.
ListItem	Definition of items that can be inserted into `ListItemAdapter`.
ListItem.ViewBinder	Functional interface to provide a way to interact with views in `ViewHolder`.
ListItem.ViewHolder	ViewHolder that supports `ViewBinder`.
ListItemAdapter	Adapter for `PagedListView` to display `ListItem`.
ListItemAdapter.BackgroundStyle	Constant class for background style of items.
ListItemProvider	Supplies data as `ListItem`.
ListItemProvider.ListProvider	A simple provider that wraps around a list.
ListPopupWindow	Static library support version of the framework's `android.widget.ListPopupWindow`.
ListPopupWindowCompat	Helper for accessing features in `ListPopupWindow`.
ListPreference	A `Preference` that displays a list of entries as a dialog.
ListPreference.SimpleSummaryProvider	A simple `androidx.preference.Preference.SummaryProvider` implementation for a `ListPreference`.
ListPreferenceDialogFragment
ListPreferenceDialogFragmentCompat
ListRow	A `Row` composed of a optional `HeaderItem`, and an `ObjectAdapter` describing the items in the list.
ListRowHoverCardView	ListRowHoverCardView contains a title and description.
ListRowPresenter	ListRowPresenter renders `ListRow` using a `HorizontalGridView` hosted in a `ListRowView`.
ListRowPresenter.SelectItemViewHolderTask	A task on the ListRowPresenter.
ListRowPresenter.ViewHolder	ViewHolder for the ListRowPresenter.
ListRowView	ListRowView is a `android.view.ViewGroup` which always contains a `HorizontalGridView`, and may optionally include a hover card.
ListUpdateCallback	An interface that can receive Update operations that are applied to a list.
ListViewAutoScrollHelper	An implementation of `AutoScrollHelper` that knows how to scroll through a `ListView`.
ListViewCompat	Helper for accessing features in `ListView`
LiveData	LiveData is a data holder class that can be observed within a given lifecycle.
LiveDataReactiveStreams	Adapts `LiveData` input and output to the ReactiveStreams spec.
LiveDataScope	Interface that allows controlling a LiveData from a coroutine block.
LivePagedListBuilder	Builder for `LiveData<PagedList>`, given a `DataSource.Factory` and a `PagedList.Config`.
Loader	Static library support version of the framework's `android.content.Loader`.
Loader.ForceLoadContentObserver	An implementation of a ContentObserver that takes care of connecting it to the Loader to have the loader re-load its data when the observer is told it has changed.
Loader.OnLoadCanceledListener	Interface that is implemented to discover when a Loader has been canceled before it finished loading its data.
Loader.OnLoadCompleteListener	Interface that is implemented to discover when a Loader has finished loading its data.
LoaderManager	Static library support version of the framework's `android.app.LoaderManager`.
LoaderManager.LoaderCallbacks	Callback interface for a client to interact with the manager.
LoaderQueryRunner	A `ContentPager.QueryRunner` that executes queries using a `LoaderManager`.
LocalBroadcastManager	Helper to register for and send broadcasts of Intents to local objects within your process.
LocaleListCompat	Helper for accessing features in `LocaleList`.
LocationManagerCompat	Helper for accessing features in `LocationManager`.
LongDef	Denotes that the annotated long element represents a logical type and that its value should be one of the explicitly named constants.
LongSparseArray	SparseArray mapping longs to Objects.
LruCache	Static library version of `android.util.LruCache`.

M

MainThread	Denotes that the annotated method should only be called on the main thread.
MarginLayoutParamsCompat	Helper for accessing API features in `MarginLayoutParams` in a backwards compatible way.
MarginPageTransformer	Adds space between pages via the `ViewPager2.PageTransformer` API.
MasterKeys	Convenient methods to create and obtain master keys in Android Keystore.
MathUtils	A utility class providing functions useful for common mathematical operations.
MbmsHelper	Helper methods for working with the `android.telephony.mbms` cell-broadcast APIs.
MediaBrowser	Browses media content offered by a `MediaLibraryService`.
MediaBrowser.BrowserCallback	Callback to listen events from `MediaLibraryService`.
MediaBrowser.Builder	Builder for `MediaBrowser`.
MediaBrowserCompat	Browses media content offered by a `MediaBrowserServiceCompat`.
MediaBrowserCompat.ConnectionCallback	Callbacks for connection related events.
MediaBrowserCompat.CustomActionCallback	Callback for receiving the result of `sendCustomAction`.
MediaBrowserCompat.ItemCallback	Callback for receiving the result of `getItem`.
MediaBrowserCompat.MediaItem	A class with information on a single media item for use in browsing/searching media.
MediaBrowserCompat.SearchCallback	Callback for receiving the result of `search`.
MediaBrowserCompat.SubscriptionCallback	Callbacks for subscription related events.
MediaBrowserServiceCompat	Base class for media browse services.
MediaBrowserServiceCompat.BrowserRoot	Contains information that the browser service needs to send to the client when first connected.
MediaBrowserServiceCompat.Result	Completion handler for asynchronous callback methods in `MediaBrowserServiceCompat`.
MediaButtonReceiver	A media button receiver receives and helps translate hardware media playback buttons, such as those found on wired and wireless headsets, into the appropriate callbacks in your app.
MediaControlIntent	Constants for media control intents.
MediaController	Allows an app to interact with an active `MediaSession` or a `MediaSessionService` which would provide `MediaSession`.
MediaController.Builder	Builder for `MediaController`.
MediaController.ControllerCallback	Interface for listening to change in activeness of the `MediaSession`.
MediaController.PlaybackInfo	Holds information about the the way volume is handled for this session.
MediaControllerAdapter	A helper class for implementing a adapter layer for `MediaControllerCompat`.
MediaControllerCompat	Allows an app to interact with an ongoing media session.
MediaControllerCompat.Callback	Callback for receiving updates on from the session.
MediaControllerCompat.PlaybackInfo	Holds information about the way volume is handled for this session.
MediaControllerCompat.TransportControls	Interface for controlling media playback on a session.
MediaControllerGlue	A helper class for implementing a glue layer for `MediaControllerCompat`.
MediaControlView	A View that contains the controls for `MediaController` or `SessionPlayer`.
MediaControlView.OnFullScreenListener	Interface definition of a callback to be invoked to inform the fullscreen mode is changed.
MediaDescriptionCompat	A simple set of metadata for a media item suitable for display.
MediaDescriptionCompat.Builder	Builder for `MediaDescriptionCompat` objects.
MediaItem	A class with information on a single media item with the metadata information.
MediaItem.Builder	Builder for `MediaItem`.
MediaItemMetadata	Constants for specifying metadata about a media item as a `Bundle`.
MediaItemStatus	Describes the playback status of a media item.
MediaItemStatus.Builder	Builder for `media item status objects`.
MediaLibraryService	Base class for media library services, which is the service containing `MediaLibrarySession`.
MediaLibraryService.LibraryParams	Contains information that the library service needs to send to the client.
MediaLibraryService.LibraryParams.Builder	Builds `LibraryParams`.
MediaLibraryService.MediaLibrarySession	Session for the `MediaLibraryService`.
MediaLibraryService.MediaLibrarySession.Builder	Builder for `MediaLibrarySession`.
MediaLibraryService.MediaLibrarySession.MediaLibrarySessionCallback	Callback for the `MediaLibrarySession`.
MediaMetadata	Contains metadata about an item, such as the title, artist, etc.
MediaMetadata.Builder	Use to build MediaMetadatax objects.
MediaMetadataCompat	Contains metadata about an item, such as the title, artist, etc.
MediaMetadataCompat.Builder	Use to build MediaMetadata objects.
MediaPlayer	A media player which plays `MediaItem`s.
MediaPlayer.PlayerCallback	Interface definition for callbacks to be invoked when the player has the corresponding events.
MediaPlayer.TrackInfo	Class for the player to return each audio/video/subtitle track's metadata.
MediaPlayerAdapter	This implementation extends the `PlayerAdapter` with a `MediaPlayer`.
MediaRouteActionProvider	The media route action provider displays a `media route button` in the application's `ActionBar` to allow the user to select routes and to control the currently selected route.
MediaRouteButton	The media route button allows the user to select routes and to control the currently selected route.
MediaRouteChooserDialog	This class implements the route chooser dialog for `MediaRouter`.
MediaRouteChooserDialogFragment	Media route chooser dialog fragment.
MediaRouteControllerDialog	This class implements the route controller dialog for `MediaRouter`.
MediaRouteControllerDialogFragment	Media route controller dialog fragment.
MediaRouteDescriptor	Describes the properties of a route.
MediaRouteDescriptor.Builder	Builder for `media route descriptors`.
MediaRouteDialogFactory	The media route dialog factory is responsible for creating the media route chooser and controller dialogs as needed.
MediaRouteDiscoveryFragment	Media route discovery fragment.
MediaRouteDiscoveryRequest	Describes the kinds of routes that the media router would like to discover and whether to perform active scanning.
MediaRouteProvider	Media route providers are used to publish additional media routes for use within an application.
MediaRouteProvider.Callback	Callback which is invoked when route information becomes available or changes.
MediaRouteProvider.DynamicGroupRouteController	Provides control over a dynamic group route.
MediaRouteProvider.DynamicGroupRouteController.DynamicRouteDescriptor	Contains a route, its selection state and its capabilities.
MediaRouteProvider.DynamicGroupRouteController.DynamicRouteDescriptor.Builder	Builder for `DynamicRouteDescriptor`
MediaRouteProvider.ProviderMetadata	Describes properties of the route provider's implementation.
MediaRouteProvider.RouteController	Provides control over a particular route.
MediaRouteProviderDescriptor	Describes the state of a media route provider and the routes that it publishes.
MediaRouteProviderDescriptor.Builder	Builder for `MediaRouteProviderDescriptor`.
MediaRouteProviderService	Base class for media route provider services.
MediaRouter	MediaRouter allows applications to control the routing of media channels and streams from the current device to external speakers and destination devices.
MediaRouter.Callback	Interface for receiving events about media routing changes.
MediaRouter.ControlRequestCallback	Callback which is invoked with the result of a media control request.
MediaRouter.ProviderInfo	Provides information about a media route provider.
MediaRouter.RouteInfo	Provides information about a media route.
MediaRouteSelector	Describes the capabilities of routes that applications would like to discover and use.
MediaRouteSelector.Builder	Builder for `media route selectors`.
MediaSession	Allows a media app to expose its transport controls and playback information in a process to other processes including the Android framework and other apps.
MediaSession.Builder	Builder for `MediaSession`.
MediaSession.CommandButton	Button for a `SessionCommand` that will be shown by the controller.
MediaSession.CommandButton.Builder	Builder for `CommandButton`.
MediaSession.ControllerInfo	Information of a controller.
MediaSession.SessionCallback	Callback to be called for all incoming commands from `MediaController`s.
MediaSessionCompat	Allows interaction with media controllers, volume keys, media buttons, and transport controls.
MediaSessionCompat.Callback	Receives transport controls, media buttons, and commands from controllers and the system.
MediaSessionCompat.OnActiveChangeListener
MediaSessionCompat.QueueItem	A single item that is part of the play queue.
MediaSessionCompat.Token	Represents an ongoing session.
MediaSessionManager	Provides support for interacting with `media sessions` that applications have published to express their ongoing media playback state.
MediaSessionManager	Provides support for interacting with media sessions that applications have published in order to express their ongoing media playback state.
MediaSessionManager.RemoteUserInfo	Information of a remote user of `MediaSessionCompat` or `MediaBrowserServiceCompat`.
MediaSessionService	Base class for media session services, which is the service containing `MediaSession`.
MediaSessionService.MediaNotification	Returned by `onUpdateNotification(MediaSession)` for making session service foreground service to keep playback running in the background.
MediaSessionStatus	Describes the playback status of a media session.
MediaSessionStatus.Builder	Builder for `media session status objects`.
MediaTimestamp	An immutable object that represents the linear correlation between the media time and the system time.
MediatorLiveData	`LiveData` subclass which may observe other `LiveData` objects and react on `OnChanged` events from them.
MenuCompat	Helper for accessing features in `android.view.Menu`.
MenuItemCompat	Helper for accessing features in `android.view.MenuItem`.
MenuItemCompat.OnActionExpandListener	Interface definition for a callback to be invoked when a menu item marked with is expanded or collapsed.
MenuRes	Denotes that an integer parameter, field or method return value is expected to be a menu resource reference.
MessageCompat	Helper for accessing features in `Message`.
MetadataConstants	Constants for android wear apps which are related to manifest meta-data.
MetadataRepo	Class to hold the emoji metadata required to process and draw emojis.
MeteringPoint	A is used to specify a region which can then be converted to sensor coordinate system for focus and metering purpose.
MeteringPointFactory	A factory to create a `MeteringPoint`.
Migration	Base class for a database migration.
MigrationTestHelper	A class that can be used in your Instrumentation tests that can create the database in an older schema.
MimeTypeFilter	Provides utility methods for matching MIME type filters used in ContentProvider.
MotionEventCompat	Helper for accessing features in `MotionEvent`.
MultiActionsProvider	An interface implemented by the user if they wish to provide actions for a media item row to be displayed by an `AbstractMediaItemPresenter`.
MultiActionsProvider.MultiAction	MultiAction represents an action that can have multiple states.
MultiSelectListPreference	A `Preference` that displays a list of entries as a dialog.
MultiSelectListPreferenceDialogFragment
MultiSelectListPreferenceDialogFragmentCompat
MutableLiveData	`LiveData` which publicly exposes `setValue(T)` and `postValue(T)` method.
MutableSelection	Subclass of `Selection` exposing public support for mutating the underlying selection data.

N

NavAction	Navigation actions provide a level of indirection between your navigation code and the underlying destinations.
NavActionBuilder	DSL for building a NavAction.
NavArgs	An interface marking generated Args classes.
NavArgsLazy	An implementation of Lazy used by android.app.Activity.navArgs and androidx.fragment.app.Fragment.navArgs.
NavArgument	NavArgument denotes an argument that is supported by a `NavDestination`.
NavArgument.Builder	A builder for constructing `NavArgument` instances.
NavArgumentBuilder	DSL for constructing a new NavArgument
NavBackStackEntry	Representation of an entry in the back stack of a `NavController`.
NavController	NavController manages app navigation within a `NavHost`.
NavController.OnDestinationChangedListener	OnDestinationChangedListener receives a callback when the `getCurrentDestination()` or its arguments change.
NavDeepLinkBuilder	Class used to construct deep links to a particular destination in a `NavGraph`.
NavDestination	NavDestination represents one node within an overall navigation graph.
NavDestination.ClassType	This optional annotation allows tooling to offer auto-complete for the `android:name` attribute.
NavDestinationBuilder	DSL for constructing a new NavDestination
NavDestinationDsl
NavDirections	An interface that describes a navigation operation: action's id and arguments
NavGraph	NavGraph is a collection of `NavDestination` nodes fetchable by ID.
NavGraphBuilder	DSL for constructing a new NavGraph
NavGraphNavigator	A Navigator built specifically for `NavGraph` elements.
NavHost	A host is a single context or container for navigation via a `NavController`.
NavHostController	Subclass of `NavController` that offers additional APIs for use by a `NavHost` to connect the NavController to external dependencies.
NavHostFragment	NavHostFragment provides an area within your layout for self-contained navigation to occur.
Navigation	Entry point for navigation operations.
NavigationRes	Denotes that an integer parameter, field or method return value is expected to be a navigation resource reference (e.g.
NavigationUI	Class which hooks up elements typically in the 'chrome' of your application such as global navigation patterns like a navigation drawer or bottom nav bar with your `NavController`.
Navigator	Navigator defines a mechanism for navigating within an app.
Navigator.Extras	Interface indicating that this class should be passed to its respective `Navigator` to enable Navigator specific behavior.
Navigator.Name	This annotation should be added to each Navigator subclass to denote the default name used to register the Navigator with a `NavigatorProvider`.
NavigatorProvider	A NavigationProvider stores a set of `Navigator`s that are valid ways to navigate to a destination.
NavInflater	Class which translates a navigation XML file into a `NavGraph`
NavOptions	NavOptions stores special options for navigate actions
NavOptions.Builder	Builder for constructing new instances of NavOptions.
NavOptionsBuilder	DSL for constructing a new NavOptions
NavOptionsDsl
NavType	NavType denotes the type that can be used in a `NavArgument`.
NavType.EnumType	EnumType is used for `NavArgument`s holding enum values.
NavType.ParcelableArrayType	ParcelableArrayType is used for `NavArgument`s which hold arrays of Parcelables.
NavType.ParcelableType	ParcelableType is used for passing Parcelables in `NavArgument`s.
NavType.SerializableArrayType	SerializableArrayType is used for `NavArgument`s that hold arrays of Serializables.
NavType.SerializableType	SerializableType is used for Serializable `NavArgument`s.
NavUtils	NavUtils provides helper functionality for applications implementing recommended Android UI navigation patterns.
NestedScrollingChild	This interface should be implemented by `View` subclasses that wish to support dispatching nested scrolling operations to a cooperating parent `ViewGroup`.
NestedScrollingChild2	This interface should be implemented by `View` subclasses that wish to support dispatching nested scrolling operations to a cooperating parent `ViewGroup`.
NestedScrollingChild3	This interface should be implemented by `View` subclasses that wish to support dispatching nested scrolling operations to a cooperating parent `ViewGroup`.
NestedScrollingChildHelper	Helper class for implementing nested scrolling child views compatible with Android platform versions earlier than Android 5.
NestedScrollingParent	This interface should be implemented by `ViewGroup` subclasses that wish to support scrolling operations delegated by a nested child view.
NestedScrollingParent2	This interface should be implemented by `ViewGroup` subclasses that wish to support scrolling operations delegated by a nested child view.
NestedScrollingParent3	This interface should be implemented by `ViewGroup` subclasses that wish to support scrolling operations delegated by a nested child view.
NestedScrollingParentHelper	Helper class for implementing nested scrolling parent views compatible with Android platform versions earlier than Android 5.
NestedScrollView	NestedScrollView is just like `android.widget.ScrollView`, but it supports acting as both a nested scrolling parent and child on both new and old versions of Android.
NestedScrollView.OnScrollChangeListener	Interface definition for a callback to be invoked when the scroll X or Y positions of a view change.
NetworkType	An enumeration of various network types that can be used as `Constraints` for work.
NightImageCaptureExtender	Load the OEM extension implementation for night effect type.
NightPreviewExtender	Load the OEM extension Preview implementation for night effect type.
NonNull	Denotes that a parameter, field or method return value can never be null.
NotificationCompat	Helper for accessing features in `android.app.Notification`.
NotificationCompat	Class containing media specfic `styles` that you can use with `androidx.core.app.NotificationCompat.Builder#setStyle`.
NotificationCompat.Action	Structure to encapsulate a named action that can be shown as part of this notification.
NotificationCompat.Action.Builder	Builder class for `Action` objects.
NotificationCompat.Action.Extender	Extender interface for use with `Builder#extend`.
NotificationCompat.Action.SemanticAction	Provides meaning to an `Action` that hints at what the associated `PendingIntent` will do.
NotificationCompat.Action.WearableExtender	Wearable extender for notification actions.
NotificationCompat.BigPictureStyle	Helper class for generating large-format notifications that include a large image attachment.
NotificationCompat.BigTextStyle	Helper class for generating large-format notifications that include a lot of text.
NotificationCompat.BubbleMetadata	Encapsulates the information needed to display a notification as a bubble.
NotificationCompat.BubbleMetadata.Builder	Builder to construct a `BubbleMetadata` object.
NotificationCompat.Builder	Builder class for `NotificationCompat` objects.
NotificationCompat.CarExtender	Helper class to add Android Auto extensions to notifications.
NotificationCompat.CarExtender.UnreadConversation	A class which holds the unread messages from a conversation.
NotificationCompat.CarExtender.UnreadConversation.Builder	Builder class for `CarExtender.UnreadConversation` objects.
NotificationCompat.DecoratedCustomViewStyle	Notification style for custom views that are decorated by the system.
NotificationCompat.DecoratedMediaCustomViewStyle	Notification style for media custom views that are decorated by the system.
NotificationCompat.Extender	Extender interface for use with `Builder#extend`.
NotificationCompat.InboxStyle	Helper class for generating large-format notifications that include a list of (up to 5) strings.
NotificationCompat.MediaStyle	Notification style for media playback notifications.
NotificationCompat.MessagingStyle	Helper class for generating large-format notifications that include multiple back-and-forth messages of varying types between any number of people.
NotificationCompat.MessagingStyle.Message
NotificationCompat.Style	An object that can apply a rich notification style to a `Notification.Builder` object.
NotificationCompat.WearableExtender	Helper class to add wearable extensions to notifications.
NotificationCompatExtras	Well-known extras used by `NotificationCompat` for backwards compatibility.
NotificationCompatSideChannelService	Abstract service to receive side channel notifications sent from `androidx.core.app.NotificationManagerCompat`.
NotificationManagerCompat	Compatibility library for NotificationManager with fallbacks for older platforms.
Nullable	Denotes that a parameter, field or method return value can be null.

O

ObjectAdapter	Base class adapter to be used in leanback activities.
ObjectAdapter.DataObserver	A DataObserver can be notified when an ObjectAdapter's underlying data changes.
ObjectsCompat	This class consists of static utility methods for operating on objects.
Observer	A simple callback that can receive from `LiveData`.
OnActionClickedListener	Interface for receiving notification when an `Action` is clicked.
OnApplyWindowInsetsListener	Listener for applying window insets on a view in a custom way.
OnBackPressedCallback	Class for handling `OnBackPressedDispatcher#onBackPressed()` callbacks without strongly coupling that implementation to a subclass of `ComponentActivity`.
OnBackPressedDispatcher	Dispatcher that can be used to register `OnBackPressedCallback` instances for handling the `ComponentActivity#onBackPressed()` callback via composition.
OnBackPressedDispatcherOwner	A class that has an `OnBackPressedDispatcher` that allows you to register a `OnBackPressedCallback` for handling the system back button.
OnboardingFragment	An OnboardingFragment provides a common and simple way to build onboarding screen for applications.
OnboardingSupportFragment	An OnboardingSupportFragment provides a common and simple way to build onboarding screen for applications.
OnChildLaidOutListener	Interface for receiving notification when a child of this ViewGroup has been laid out.
OnChildSelectedListener	Interface for receiving notification when a child of this ViewGroup has been selected.
OnChildViewHolderSelectedListener	Interface for receiving notification when a child of this ViewGroup has been selected.
OnConflictStrategy	Set of conflict handling strategies for various `Dao` methods.
OnContextClickListener	Register an OnContextClickListener to be notified when a context click occurs.
OnDragInitiatedListener	Register an OnDragInitiatedListener to be notified when user intent to perform drag and drop operations on an item or items has been detected.
OneShotPreDrawListener	An OnPreDrawListener that will remove itself after one OnPreDraw call.
OneTimeWorkRequest	A `WorkRequest` for non-repeating work.
OneTimeWorkRequest.Builder	Builder for `OneTimeWorkRequest`s.
OnItemActivatedListener	Register an OnItemActivatedListener to be notified when an item is activated (tapped or double clicked).
OnItemViewClickedListener	Interface for receiving notification when a item view holder is clicked.
OnItemViewSelectedListener	Interface for receiving notification when a row or item becomes selected.
OnLifecycleEvent
OnUxRestrictionsChangedListener	Listener Interface for clients to implement to get updated on User Experience Restrictions (UXR, or UX restrictions) related changes.
Operation	An object that provides information about the execution of an asynchronous command being performed by `WorkManager`.
Operation.State	The lifecycle state of an `Operation`.
Operation.State.FAILURE	This represents an `Operation` which has failed.
Operation.State.IN_PROGRESS	This represents an `Operation` which is in progress.
Operation.State.SUCCESS	This represents an `Operation` which is successful.
OperationCanceledException	An exception type that is thrown when an operation in progress is canceled.
OperationMonitor	OperationMonitor provides a mechanism to coordinate application logic with ongoing user selection activities (such as active band selection and active gesture selection).
OperationMonitor.OnChangeListener	Listen to changes in operation status.
OrientationHelper	Helper class for LayoutManagers to abstract measurements depending on the View's orientation.
OutputConfigurationCompat	Helper for accessing features in OutputConfiguration in a backwards compatible fashion.
OverwritingInputMerger	An `InputMerger` that attempts to add all keys from all inputs to the output.

P

PackageInfoCompat	Helper for accessing features in `PackageInfo`.
PagedList	Lazy loading list that pages in immutable content from a `DataSource`.
PagedList.BoundaryCallback	Signals when a PagedList has reached the end of available data.
PagedList.Builder	Builder class for PagedList.
PagedList.Callback	Callback signaling when content is loaded into the list.
PagedList.Config	Configures how a PagedList loads content from its DataSource.
PagedList.Config.Builder	Builder class for `Config`.
PagedListAdapter	`RecyclerView.Adapter` base class for presenting paged data from `PagedList`s in a `RecyclerView`.
PagedListView	View that wraps a `RecyclerView` and a scroll bar that has page up and down arrows.
PagedListView.DividerVisibilityManager	Interface for controlling visibility of item dividers for individual items based on the item's position.
PagedListView.Gutter	The possible values for @{link #setGutter}.
PagedListView.ItemCap	Interface for a `RecyclerView.Adapter` to cap the number of items.
PagedListView.ItemPositionOffset	Interface for a `RecyclerView.Adapter` to set the position offset for the adapter to load the data.
PagedListView.OnScrollListener	Used to listen for `PagedListView` scroll events.
PagedScrollBarView	A custom view to provide list scroll behaviour -- up/down buttons and scroll indicator.
PagedScrollBarView.PaginationListener	Listener for when the list should paginate.
PageKeyedDataSource	Incremental data loader for page-keyed content, where requests return keys for next/previous pages.
PageKeyedDataSource.LoadCallback	Callback for PageKeyedDataSource `loadBefore(LoadParams, LoadCallback)` and `loadAfter(LoadParams, LoadCallback)` to return data.
PageKeyedDataSource.LoadInitialCallback	Callback for `loadInitial(LoadInitialParams, LoadInitialCallback)` to return data and, optionally, position/count information.
PageKeyedDataSource.LoadInitialParams	Holder object for inputs to `loadInitial(LoadInitialParams, LoadInitialCallback)`.
PageKeyedDataSource.LoadParams	Holder object for inputs to `loadBefore(LoadParams, LoadCallback)` and `loadAfter(LoadParams, LoadCallback)`.
PagerAdapter	Base class providing the adapter to populate pages inside of a `ViewPager`.
PageRow	Used to represent content spanning full page.
PagerSnapHelper	Implementation of the `SnapHelper` supporting pager style snapping in either vertical or horizontal orientation.
PagerTabStrip	PagerTabStrip is an interactive indicator of the current, next, and previous pages of a `ViewPager`.
PagerTitleStrip	PagerTitleStrip is a non-interactive indicator of the current, next, and previous pages of a `ViewPager`.
PaintCompat	Helper for accessing features in `Paint`.
Pair	Container to ease passing around a tuple of two objects.
Palette	A helper class to extract prominent colors from an image.
Palette.Builder	Builder class for generating `Palette` instances.
Palette.Filter	A Filter provides a mechanism for exercising fine-grained control over which colors are valid within a resulting `Palette`.
Palette.PaletteAsyncListener	Listener to be used with `generateAsync(Bitmap, PaletteAsyncListener)` or `generateAsync(Bitmap, int, PaletteAsyncListener)`
Palette.Swatch	Represents a color swatch generated from an image's palette.
Parallax	Parallax tracks a list of dynamic `Property`s typically representing foreground UI element positions on screen.
Parallax.FloatProperty	FloatProperty provide access to an index based integer type property inside `Parallax`.
Parallax.IntProperty	IntProperty provide access to an index based integer type property inside `Parallax`.
Parallax.PropertyMarkerValue	Class holding a fixed value for a Property in `Parallax`.
ParallaxEffect	ParallaxEffect class drives changes in `ParallaxTarget` in response to changes in variables defined in `Parallax`.
ParallaxTarget	ParallaxTarget is responsible for updating the target through the `update(float)` method or the `directUpdate(Number)` method when `isDirectMapping()` is true.
ParallaxTarget.DirectPropertyTarget	DirectPropertyTarget is to support direct mapping into either Integer Property or Float Property.
ParallaxTarget.PropertyValuesHolderTarget	PropertyValuesHolderTarget is an implementation of `ParallaxTarget` that uses `PropertyValuesHolder` to update the target object.
ParcelableCompat	Helper for accessing features in `android.os.Parcelable`.
ParcelableCompatCreatorCallbacks	Callbacks a `Parcelable` creator should implement.
ParcelableVolumeInfo	Convenience class for passing information about the audio configuration of a `MediaSessionCompat`.
ParcelCompat	Helper for accessing features in `Parcel`.
ParcelUtils	Utilities for managing `VersionedParcelable`s.
PathInterpolatorCompat	Helper for creating path-based `Interpolator` instances.
PathMotion	This base class can be extended to provide motion along a Path to Transitions.
PathSegment	A line segment that represents an approximate fraction of a `Path` after flattening.
PathUtils	A set of path-related utility methods.
PatternPathMotion	A PathMotion that takes a Path pattern and applies it to the separation between two points.
PatternsCompat	Commonly used regular expression patterns.
PercentageRating	A class for rating expressed as a percentage.
PercentFrameLayout	Subclass of `android.widget.FrameLayout` that supports percentage based dimensions and margins.
PercentFrameLayout.LayoutParams
PercentLayoutHelper	Helper for layouts that want to support percentage based dimensions.
PercentLayoutHelper.PercentLayoutInfo	Container for information about percentage dimensions and margins.
PercentLayoutHelper.PercentLayoutParams	If a layout wants to support percentage based dimensions and use this helper class, its `LayoutParams` subclass must implement this interface.
PercentRelativeLayout	Subclass of `android.widget.RelativeLayout` that supports percentage based dimensions and margins.
PercentRelativeLayout.LayoutParams
PeriodicWorkRequest	A `WorkRequest` for repeating work.
PeriodicWorkRequest.Builder	Builder for `PeriodicWorkRequest`s.
PermissionChecker	This class provides permission check APIs that verify both the permission and the associated app op for this permission if such is defined.
PermissionInfoCompat	Helper for accessing features in `PermissionInfo`.
Person	Provides an immutable reference to an entity that appears repeatedly on different surfaces of the platform.
Person.Builder	Builder for the immutable `Person` class.
Picker	Picker is a widget showing multiple customized `PickerColumn`s.
Picker.PickerValueListener	Listener for `Picker` value changes.
PickerColumn	Picker column class used by `Picker`, defines a contiguous value ranges and associated labels.
PinPicker	`Picker` subclass for allowing the user to enter a numerical PIN.
PlaybackBannerControlGlue	A helper class for managing a `PlaybackControlsRow` being displayed in `PlaybackGlueHost`.
PlaybackBaseControlGlue	A base abstract class for managing a `PlaybackControlsRow` being displayed in `PlaybackGlueHost`.
PlaybackControlGlue	A helper class for managing a `PlaybackControlsRow` and `PlaybackGlueHost` that implements a recommended approach to handling standard playback control actions such as play/pause, fast forward/rewind at progressive speed levels, and skip to next/previous.
PlaybackControlsRow	A `Row` of playback controls to be displayed by a `PlaybackControlsRowPresenter`.
PlaybackControlsRow.ClosedCaptioningAction	An action for displaying a CC (Closed Captioning) icon.
PlaybackControlsRow.FastForwardAction	An action displaying an icon for fast forward.
PlaybackControlsRow.HighQualityAction	An action for displaying a HQ (High Quality) icon.
PlaybackControlsRow.MoreActions	An action displaying an icon for "more actions".
PlaybackControlsRow.MultiAction	Base class for an action comprised of a series of icons.
PlaybackControlsRow.OnPlaybackProgressCallback	Listener for progress or duration change.
PlaybackControlsRow.PictureInPictureAction	An action displaying an icon for picture-in-picture.
PlaybackControlsRow.PlayPauseAction	An action displaying icons for play and pause.
PlaybackControlsRow.RepeatAction	An action for displaying three repeat states: none, one, or all.
PlaybackControlsRow.RewindAction	An action displaying an icon for rewind.
PlaybackControlsRow.ShuffleAction	An action for displaying a shuffle icon.
PlaybackControlsRow.SkipNextAction	An action displaying an icon for skip next.
PlaybackControlsRow.SkipPreviousAction	An action displaying an icon for skip previous.
PlaybackControlsRow.ThumbsAction	A base class for displaying a thumbs action.
PlaybackControlsRow.ThumbsDownAction	An action displaying an icon for thumbs down.
PlaybackControlsRow.ThumbsUpAction	An action displaying an icon for thumbs up.
PlaybackControlsRowPresenter	A PlaybackControlsRowPresenter renders a `PlaybackControlsRow` to display a series of playback control buttons.
PlaybackControlsRowPresenter.ViewHolder	A ViewHolder for the PlaybackControlsRow.
PlaybackFragment	A fragment for displaying playback controls and related content.
PlaybackFragmentGlueHost	`PlaybackGlueHost` implementation the interaction between this class and `PlaybackFragment`.
PlaybackGlue	Base class for abstraction of media play/pause feature.
PlaybackGlue.PlayerCallback	Interface to allow clients to take action once the video is ready to play and start stop.
PlaybackGlueHost	This class represents the UI (e.g. Fragment/Activity) hosting playback controls and defines the interaction between
PlaybackGlueHost.HostCallback	Callbacks triggered by the host(e.g. fragment) hosting the video controls/surface.
PlaybackGlueHost.PlayerCallback	Optional Client that implemented by PlaybackGlueHost to respond to player event.
PlaybackParams	Structure for common playback params.
PlaybackParams.Builder	The builder class that makes it easy to chain setters to create a `PlaybackParams` object.
PlaybackRowPresenter	Subclass of `RowPresenter` that can define the desired behavior when the view reappears.
PlaybackRowPresenter.ViewHolder	This container is used for trapping click events and passing them to the playback controls.
PlaybackSeekDataProvider	Class to be implemented by app to provide seeking data and thumbnails to UI.
PlaybackSeekDataProvider.ResultCallback	Client to receive result for `PlaybackSeekDataProvider#getThumbnail(int, * ResultCallback)`.
PlaybackSeekUi	Interface to be implemented by UI component to support seeking.
PlaybackSeekUi.Client	Client (e.g. PlaybackGlue) to register on PlaybackSeekUi so that it can interact with Seeking UI.
PlaybackStateCompat	Playback state for a `MediaSessionCompat`.
PlaybackStateCompat.Builder	Builder for `PlaybackStateCompat` objects.
PlaybackStateCompat.CustomAction	`CustomActions` can be used to extend the capabilities of the standard transport controls by exposing app specific actions to `Controllers`.
PlaybackStateCompat.CustomAction.Builder	Builder for `CustomAction` objects.
PlaybackSupportFragment	A fragment for displaying playback controls and related content.
PlaybackSupportFragmentGlueHost	`PlaybackGlueHost` implementation the interaction between this class and `PlaybackSupportFragment`.
PlaybackTransportControlGlue	A helper class for managing a `PlaybackControlsRow` being displayed in `PlaybackGlueHost`, it supports standard playback control actions play/pause, and skip next/previous.
PlaybackTransportRowPresenter	A PlaybackTransportRowPresenter renders a `PlaybackControlsRow` to display a series of playback control buttons.
PlaybackTransportRowPresenter.ViewHolder	A ViewHolder for the PlaybackControlsRow supporting seek UI.
PlayerAdapter	Base class that wraps underlying media player.
PlayerAdapter.Callback	Client for client of PlayerAdapter.
PluralsRes	Denotes that an integer parameter, field or method return value is expected to be a plurals resource reference.
PointerIconCompat	Helper for accessing features in `android.view.PointerIcon` in a backwards compatible fashion.
Pools	Helper class for creating pools of objects.
Pools.Pool	Interface for managing a pool of objects.
Pools.SimplePool	Simple (non-synchronized) pool of objects.
Pools.SynchronizedPool	Synchronized) pool of objects.
PopupMenu	Static library support version of the framework's `android.widget.PopupMenu`.
PopupMenu.OnDismissListener	Callback interface used to notify the application that the menu has closed.
PopupMenu.OnMenuItemClickListener	Interface responsible for receiving menu item click events if the items themselves do not have individual item click listeners.
PopupMenuCompat	Helper for accessing features in `PopupMenu`.
PopUpToBuilder	DSL for customizing NavOptionsBuilder.popUpTo operations.
PopupWindowCompat	Helper for accessing features in `PopupWindow`.
PositionalDataSource	Position-based data loader for a fixed-size, countable data set, supporting fixed-size loads at arbitrary page positions.
PositionalDataSource.LoadInitialCallback	Callback for `loadInitial(LoadInitialParams, LoadInitialCallback)` to return data, position, and count.
PositionalDataSource.LoadInitialParams	Holder object for inputs to `loadInitial(LoadInitialParams, LoadInitialCallback)`.
PositionalDataSource.LoadRangeCallback	Callback for PositionalDataSource `loadRange(LoadRangeParams, LoadRangeCallback)` to return data.
PositionalDataSource.LoadRangeParams	Holder object for inputs to `loadRange(LoadRangeParams, LoadRangeCallback)`.
PostMessageService	A service to receive postMessage related communication from a Custom Tabs provider.
PostMessageServiceConnection	A `ServiceConnection` for Custom Tabs providers to use while connecting to a `PostMessageService` on the client side.
PrecomputedTextCompat	A text which has the character metrics data.
PrecomputedTextCompat.Params	The information required for building `PrecomputedTextCompat`.
PrecomputedTextCompat.Params.Builder	A builder for creating `Params`.
Predicate	Compat version of `java.util.function.Predicate`
Preference	The basic building block that represents an individual setting displayed to a user in the preference hierarchy.
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.
Preference.SummaryProvider	Interface definition for a callback to be invoked when the summary of this `Preference` is requested (typically when this preference is added to the hierarchy or its value is updated).
PreferenceCategory	A container that is used to group similar `Preference`s.
PreferenceDataStore	A data store interface to be implemented and provided to the `Preference` framework.
PreferenceDialogFragment	Abstract base class which presents a dialog associated with a `DialogPreference`.
PreferenceDialogFragmentCompat	Abstract base class which presents a dialog associated with a `DialogPreference`.
PreferenceFragment	Shows a hierarchy of `Preference` objects as lists.
PreferenceFragment.OnPreferenceDisplayDialogCallback	Interface that the fragment's containing activity should implement to be able to process preference items that wish to display a dialog.
PreferenceFragment.OnPreferenceStartFragmentCallback	Interface that the fragment's containing activity should implement to be able to process preference items that wish to switch to a specified fragment.
PreferenceFragment.OnPreferenceStartScreenCallback	Interface that the fragment's containing activity should implement to be able to process preference items that wish to switch to a new screen of preferences.
PreferenceFragmentCompat	A PreferenceFragmentCompat is the entry point to using the Preference library.
PreferenceFragmentCompat.OnPreferenceDisplayDialogCallback	Interface that the fragment's containing activity should implement to be able to process preference items that wish to display a dialog.
PreferenceFragmentCompat.OnPreferenceStartFragmentCallback	Interface that the fragment's containing activity should implement to be able to process preference items that wish to switch to a specified fragment.
PreferenceFragmentCompat.OnPreferenceStartScreenCallback	Interface that the fragment's containing activity sho