MediaControlView

public class MediaControlView
extends ViewGroup

java.lang.Object
   ↳ android.view.View
     ↳ android.view.ViewGroup
       ↳ androidx.media2.widget.MediaControlView


A View that contains the controls for MediaController or SessionPlayer. It provides a wide range of buttons that serve the following functions: play/pause, rewind/fast-forward, skip to next/previous, select subtitle track, enter/exit full screen mode, select audio track, and adjust playback speed.

For simple use cases not requiring communication with MediaSession, apps need to create a SessionPlayer (e.g. MediaPlayer) and set it to this view by calling setPlayer(SessionPlayer). For more advanced use cases that require MediaSession (e.g. handling media key events, integrating with other MediaSession apps as Assistant), apps need to create a MediaController attached to the MediaSession and set it to this view by calling setMediaController(MediaController).

The easiest way to use a MediaControlView is by creating a VideoView, which internally creates a MediaControlView instance and handles all the commands from buttons inside MediaControlView. It is also possible to create a MediaControlView programmatically and add it to a custom video view. For more information, refer to VideoView.

By default, each button in the MediaControlView is visible only when its corresponding SessionCommand is included in the active SessionCommandGroup. For more details, refer to MediaSession.setAllowedCommands(MediaSession.ControllerInfo, SessionCommandGroup).

UI transitions

The UI of an app can be in one of three modes:
  • In full mode all the views, such as progress bar, title, transport controls, and other icons are visible.
  • In progress-bar only mode the progress bar is the only visible element. The title, transport controls, and other icons are hidden.
  • In None mode all the views are hidden.
When the UI mode changes, MediaControlView animates the transition. The animation does not start immediately, there is a default delay interval of 2000ms before the animation begins. You can change this interval by calling VideoView.setMediaControlView(MediaControlView, long).

User actions can change the scheduled transition during the delay interval according to the following logic:

  1. In Full mode
    • If a touch/trackball event is received during the interval, the UI changes to None mode.
    • If no touch/trackball event is received during the interval, the UI changes to progress-bar only mode.
  2. In Progress-bar only mode
    • If a touch/trackball event is received, the UI changes to Full mode.
    • If no touch/trackball event is received, the UI changes to None mode.
  3. In None mode, if a touch/trackball event is received, the UI changes to Full mode.
All touch/trackballs events are ignored while the system is animating the change between modes.

Customization

The following customizations are supported:

Displaying metadata

MediaControlView supports displaying metadata by calling MediaItem.setMetadata(MediaMetadata). Metadata display is different for two different media types: video (with or without sound) and audio(sound only, no video)

The following table shows the metadata displayed on VideoView and the default values assigned if the keys are not set:

KeyDefault
MediaMetadata.METADATA_KEY_TITLE R.string.mcv2_music_title_unknown_text
MediaMetadata.METADATA_KEY_ARTIST R.string.mcv2_music_artist_unknown_text
MediaMetadata.METADATA_KEY_ALBUM_ART R.drawable.media2_widget_ic_default_album_image

For video media, MediaMetadata.METADATA_KEY_TITLE metadata is supported. If the value is not set, the following default value will be shown: R.string.mcv2_non_music_title_unknown_text

Summary

Nested classes

interface MediaControlView.OnFullScreenListener

Interface definition of a callback to be invoked to inform the fullscreen mode is changed. 

Inherited constants