MediaControlView
open class MediaControlView : ViewGroup
| kotlin.Any | |||
| ↳ | 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. androidx.media2.player.MediaPlayer) and set it to this view by calling setPlayer. 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.
The easiest way to use a MediaControlView is by creating a VideoView, which will internally create a MediaControlView instance and handle 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, the buttons inside MediaControlView will not visible unless the corresponding SessionCommand is marked as allowed. For more details, refer to MediaSession.
UI transitions : Currently, MediaControlView animates UI transitions between three different modes: full, progress-bar only, and none. Full mode is where all the views are visible; Progress-bar only mode is where only the progress bar is visible and the title, transport controls and other icons are hidden; None mode is where all views are gone. The default interval between each mode is 2000ms, but it can be customized by using VideoView#setMediaControlView(MediaControlView, long). Transitions occur based on the following logic: 1) In Full mode a) If a touch/trackball event is received, will transition to None mode. b) If a touch/trackball event is not received, will transition to Progress-bar only mode after the interval. 2) In Progress-bar only mode a) If a touch/trackball event is received, will transition to Full mode. b) If a touch/trackball event is not received, will transition to None mode after the interval. 3) In None mode a) If a touch/trackball event is received, will transition to Full mode. 4) While animating, all touch/trackball event will be ignored.
Customization : In addition, the following customizations are supported: 1) Set focus to the play/pause button by calling requestPlayButtonFocus(). 2) Set full screen behavior by calling setOnFullScreenListener(OnFullScreenListener)
Displaying metadata : MediaControlView supports displaying metadata by calling MediaItem#setMetadata(MediaMetadata). Metadata display is different for two different media types: music, and non-music. For music, the following metadata are supported: MediaMetadata#METADATA_KEY_TITLE, MediaMetadata#METADATA_KEY_ARTIST, and MediaMetadata#METADATA_KEY_ALBUM_ART. If values for these keys are not set, the following default values will be shown, respectively: androidx.media2.widget.R.string#mcv2_music_title_unknown_text androidx.media2.widget.R.string#mcv2_music_artist_unknown_text androidx.media2.widget.R.drawable#ic_default_album_image For non-music, only MediaMetadata#METADATA_KEY_TITLE metadata is supported. If the value is not set, the following default value will be shown: androidx.media2.widget.R.string#mcv2_non_music_title_unknown_text
Summary
Nested classes |
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| abstract |
Interface definition of a callback to be invoked to inform the fullscreen mode is changed. |
Public constructors |
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<init>(@NonNull context: Context, @Nullable attrs: AttributeSet?) |
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<init>(@NonNull context: Context, @Nullable attrs: AttributeSet?, defStyleAttr: Int) |
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Public methods |
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| open CharSequence! | |
| open Boolean |
onTouchEvent(ev: MotionEvent!) |
| open Boolean |
onTrackballEvent(ev: MotionEvent!) |
| open Unit |
onVisibilityAggregated(isVisible: Boolean) |
| open Unit |
Requests focus for the play/pause button. |
| open Unit |
setMediaController(@NonNull controller: MediaController)Sets |
| open Unit |
setOnFullScreenListener(@Nullable listener: MediaControlView.OnFullScreenListener?)Sets a listener to be called when the fullscreen mode should be changed. |
| open Unit |
setPlayer(@NonNull player: SessionPlayer)Sets |
Protected methods |
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| open Unit | |
| open Unit | |
| open Unit | |
| open Unit | |
Public constructors
<init>
MediaControlView(@NonNull context: Context)
<init>
MediaControlView(@NonNull context: Context, @Nullable attrs: AttributeSet?)
<init>
MediaControlView(@NonNull context: Context, @Nullable attrs: AttributeSet?, defStyleAttr: Int)
Public methods
getAccessibilityClassName
open fun getAccessibilityClassName(): CharSequence!
onTouchEvent
open fun onTouchEvent(ev: MotionEvent!): Boolean
onTrackballEvent
open fun onTrackballEvent(ev: MotionEvent!): Boolean
requestPlayButtonFocus
open fun requestPlayButtonFocus(): Unit
Requests focus for the play/pause button.
setMediaController
open fun setMediaController(@NonNull controller: MediaController): Unit
Sets MediaController to control playback with this view. Setting a MediaController will unset any MediaController or SessionPlayer that was previously set.
It will throw IllegalStateException if this MediaControlView belongs to a VideoView by androidx.media2.widget.R.attr#enableControlView or by VideoView#setMediaControlView. Use VideoView#setMediaController instead.
Note that MediaControlView allows controlling playback through its UI components, but calling the corresponding methods (e.g. MediaController#play(), MediaController#pause()) will work as well.
| Parameters | |
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controller |
MediaController: the controller |
See Also
setOnFullScreenListener
open fun setOnFullScreenListener(@Nullable listener: MediaControlView.OnFullScreenListener?): Unit
Sets a listener to be called when the fullscreen mode should be changed. A non-null listener needs to be set in order to display the fullscreen button.
| Parameters | |
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listener |
MediaControlView.OnFullScreenListener?: The listener to be called. A value of null removes any existing listener and hides the fullscreen button. |
setPlayer
open fun setPlayer(@NonNull player: SessionPlayer): Unit
Sets SessionPlayer to control playback with this view. Setting a SessionPlayer will unset any MediaController or SessionPlayer that was previously set.
It will throw IllegalStateException if this MediaControlView belongs to a VideoView by androidx.media2.widget.R.attr#enableControlView or by VideoView#setMediaControlView. Use VideoView#setPlayer instead.
Note that MediaControlView allows controlling playback through its UI components, but calling the corresponding methods (e.g. SessionPlayer#play(), SessionPlayer#pause()) will work as well.
| Parameters | |
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player |
SessionPlayer: the player |
See Also
Protected methods
onAttachedToWindow
protected open fun onAttachedToWindow(): Unit
onDetachedFromWindow
protected open fun onDetachedFromWindow(): Unit
onLayout
protected open fun onLayout(changed: Boolean, left: Int, top: Int, right: Int, bottom: Int): Unit