AspectRatioFrameLayout.AspectRatioListener	Listener to be notified about changes of the aspect ratios of this view.
LegacyPlayerControlView.ProgressUpdateListener	Listener to be notified when progress has been updated.
LegacyPlayerControlView.VisibilityListener	Listener to be notified about changes of the visibility of the UI control.
PlayerControlView.OnFullScreenModeChangedListener
PlayerControlView.ProgressUpdateListener	Listener to be notified when progress has been updated.
PlayerControlView.VisibilityListener
PlayerNotificationManager.CustomActionReceiver	Defines and handles custom actions.
PlayerNotificationManager.MediaDescriptionAdapter	An adapter to provide content assets of the media currently playing.
PlayerNotificationManager.NotificationListener	A listener for changes to the notification.
PlayerView.ControllerVisibilityListener	Listener to be notified about changes of the visibility of the UI controls.
PlayerView.FullscreenButtonClickListener	Listener invoked when the fullscreen button is clicked.
TimeBar	Interface for time bar views that can display a playback position, buffered position, duration and ad markers, and that have a listener for scrubbing (seeking) events.
TimeBar.OnScrubListener	Listener for scrubbing events.
TrackNameProvider	Converts Formats to user readable track names.
TrackSelectionDialogBuilder.DialogCallback	Callback which is invoked when a track selection has been made.
TrackSelectionView.TrackSelectionListener	Listener for changes to the selected tracks.

AspectRatioFrameLayout	A `FrameLayout` that resizes itself to match a specified aspect ratio.
CaptionStyleCompat	A compatibility wrapper for .
DefaultMediaDescriptionAdapter	Default implementation of PlayerNotificationManager.MediaDescriptionAdapter.
DefaultTimeBar	A time bar that shows a current position, buffered position, duration and ad markers.
DefaultTrackNameProvider	A default TrackNameProvider.
LegacyPlayerControlView	A view for controlling Player instances.
PlayerControlView	A view for controlling Player instances.
PlayerNotificationManager	Starts, updates and cancels a media style notification reflecting the player state.
PlayerNotificationManager.BitmapCallback	Receives a `Bitmap`.
PlayerNotificationManager.Builder	A builder for PlayerNotificationManager instances.
PlayerView	A high level view for Player media playbacks.
SubtitleView	A view for displaying subtitle Cues.
TrackSelectionDialogBuilder	Builder for a dialog with a TrackSelectionView.
TrackSelectionView	A view for making track selections.
WearUnsuitableOutputPlaybackSuppressionResolverListener	A that launches a system dialog in response to Player.PLAYBACK_SUPPRESSION_REASON_UNSUITABLE_AUDIO_OUTPUT to allow the user to connect a suitable audio output.

AspectRatioFrameLayout.ResizeMode	Resize modes for AspectRatioFrameLayout.
CaptionStyleCompat.EdgeType	The type of edge, which may be none.
PlayerNotificationManager.Priority	Priority of the notification (required for API 25 and lower).
PlayerNotificationManager.Visibility	Visibility of notification on the lock screen.
PlayerView.ArtworkDisplayMode	Determines the artwork display mode.
PlayerView.ImageDisplayMode	Determines the image display mode.
PlayerView.ShowBuffering	Determines when the buffering view is shown.
SubtitleView.ViewType	The type of `View` to use to display subtitles.