# MediaPlayerAdapter
added in[version 26.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
belongs to Maven artifact com.android.support:leanback-v17:28.0.0-alpha1
Summary:[Ctors](https://developer.android.com/reference/android/support/v17/leanback/media/MediaPlayerAdapter#pubctors)\|[Methods](https://developer.android.com/reference/android/support/v17/leanback/media/MediaPlayerAdapter#pubmethods)\|[Protected Methods](https://developer.android.com/reference/android/support/v17/leanback/media/MediaPlayerAdapter#promethods)\|[Inherited Methods](https://developer.android.com/reference/android/support/v17/leanback/media/MediaPlayerAdapter#inhmethods)\|[\[Expand All\]](https://developer.android.com/reference/android/support/v17/leanback/media/MediaPlayerAdapter#)
# MediaPlayerAdapter
| This package is part of the Android[support library](https://developer.android.com/topic/libraries/support-library)which is no longer maintained. The support library has been superseded by[AndroidX](https://developer.android.com/jetpack/androidx)which is part of[Jetpack](https://developer.android.com/jetpack). We recommend using the AndroidX libraries in all new projects. You should also consider[migrating](https://developer.android.com/jetpack/androidx/migrate)existing projects to AndroidX. To find the AndroidX class that maps to this deprecated class, see the AndroidX support library[class mappings](https://developer.android.com/jetpack/androidx/migrate/class-mappings).
`
public
class
MediaPlayerAdapter
`
`
``
extends `[PlayerAdapter](https://developer.android.com/reference/android/support/v17/leanback/media/PlayerAdapter)`
``
`
|---|---|-------------------------------------------------------|
| java.lang.Object |||
| ↳ | [android.support.v17.leanback.media.PlayerAdapter](https://developer.android.com/reference/android/support/v17/leanback/media/PlayerAdapter) ||
| | ↳ | android.support.v17.leanback.media.MediaPlayerAdapter |
*** ** * ** ***
This implementation extends the[PlayerAdapter](https://developer.android.com/reference/android/support/v17/leanback/media/PlayerAdapter)with a[MediaPlayer](https://developer.android.com/reference/android/media/MediaPlayer.html).
## Summary
| ### Public constructors ||
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---|
| ` `[MediaPlayerAdapter](https://developer.android.com/reference/android/support/v17/leanback/media/MediaPlayerAdapter#MediaPlayerAdapter(android.content.Context))`(`[Context](https://developer.android.com/reference/android/content/Context.html)` context) ` Constructor. |
| ### Public methods ||
|------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| ` long` | ` `[getBufferedPosition](https://developer.android.com/reference/android/support/v17/leanback/media/MediaPlayerAdapter#getBufferedPosition())`() ` Returns the current buffered position of the media item in milliseconds. |
| ` long` | ` `[getCurrentPosition](https://developer.android.com/reference/android/support/v17/leanback/media/MediaPlayerAdapter#getCurrentPosition())`() ` Returns the current position of the media item in milliseconds. |
| ` long` | ` `[getDuration](https://developer.android.com/reference/android/support/v17/leanback/media/MediaPlayerAdapter#getDuration())`() ` Returns the duration of the media item in milliseconds. |
| ` boolean` | ` `[isPlaying](https://developer.android.com/reference/android/support/v17/leanback/media/MediaPlayerAdapter#isPlaying())`() ` Returns true if media is currently playing. |
| ` boolean` | ` `[isPrepared](https://developer.android.com/reference/android/support/v17/leanback/media/MediaPlayerAdapter#isPrepared())`() ` |
| ` void` | ` `[onAttachedToHost](https://developer.android.com/reference/android/support/v17/leanback/media/MediaPlayerAdapter#onAttachedToHost(android.support.v17.leanback.media.PlaybackGlueHost))`(`[PlaybackGlueHost](https://developer.android.com/reference/android/support/v17/leanback/media/PlaybackGlueHost)` host) ` This method is called attached to associated[PlaybackGlueHost](https://developer.android.com/reference/android/support/v17/leanback/media/PlaybackGlueHost). |
| ` void` | ` `[onDetachedFromHost](https://developer.android.com/reference/android/support/v17/leanback/media/MediaPlayerAdapter#onDetachedFromHost())`() ` This method is called when current associated[PlaybackGlueHost](https://developer.android.com/reference/android/support/v17/leanback/media/PlaybackGlueHost)is attached to a different[PlaybackGlue](https://developer.android.com/reference/android/support/v17/leanback/media/PlaybackGlue)or[PlaybackGlueHost](https://developer.android.com/reference/android/support/v17/leanback/media/PlaybackGlueHost)is destroyed. |
| ` void` | ` `[pause](https://developer.android.com/reference/android/support/v17/leanback/media/MediaPlayerAdapter#pause())`() ` Pauses the media player. |
| ` void` | ` `[play](https://developer.android.com/reference/android/support/v17/leanback/media/MediaPlayerAdapter#play())`() ` Starts the media player. |
| ` void` | ` `[release](https://developer.android.com/reference/android/support/v17/leanback/media/MediaPlayerAdapter#release())`() ` Release internal MediaPlayer. |
| ` void` | ` `[reset](https://developer.android.com/reference/android/support/v17/leanback/media/MediaPlayerAdapter#reset())`() ` Will reset the[MediaPlayer](https://developer.android.com/reference/android/media/MediaPlayer.html)and the glue such that a new file can be played. |
| ` void` | ` `[seekTo](https://developer.android.com/reference/android/support/v17/leanback/media/MediaPlayerAdapter#seekTo(long))`(long newPosition) ` Seek to new position. |
| ` boolean` | ` `[setDataSource](https://developer.android.com/reference/android/support/v17/leanback/media/MediaPlayerAdapter#setDataSource(android.net.Uri))`(`[Uri](https://developer.android.com/reference/android/net/Uri.html)` uri) ` Sets the media source of the player witha given URI. |
| ` void` | ` `[setProgressUpdatingEnabled](https://developer.android.com/reference/android/support/v17/leanback/media/MediaPlayerAdapter#setProgressUpdatingEnabled(boolean))`(boolean enabled) ` Implement this method to enable or disable progress updating. |
| ### Protected methods ||
|------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| ` boolean` | ` `[onError](https://developer.android.com/reference/android/support/v17/leanback/media/MediaPlayerAdapter#onError(int, int))`(int what, int extra) ` Called to indicate an error. |
| ` boolean` | ` `[onInfo](https://developer.android.com/reference/android/support/v17/leanback/media/MediaPlayerAdapter#onInfo(int, int))`(int what, int extra) ` Called to indicate an info or a warning. |
| ` void` | ` `[onSeekComplete](https://developer.android.com/reference/android/support/v17/leanback/media/MediaPlayerAdapter#onSeekComplete())`() ` Called to indicate the completion of a seek operation. |
| ### Inherited methods |
|-----------------------|---|
| [](https://developer.android.com/reference/android/support/v17/leanback/media/MediaPlayerAdapter#)From class` `[android.support.v17.leanback.media.PlayerAdapter](https://developer.android.com/reference/android/support/v17/leanback/media/PlayerAdapter)` ` |--------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | ` void` | ` `[fastForward](https://developer.android.com/reference/android/support/v17/leanback/media/PlayerAdapter#fastForward())`() ` Optional method. | | ` long` | ` `[getBufferedPosition](https://developer.android.com/reference/android/support/v17/leanback/media/PlayerAdapter#getBufferedPosition())`() ` Returns the current buffered position of the media item in milliseconds. | | ` final `[PlayerAdapter.Callback](https://developer.android.com/reference/android/support/v17/leanback/media/PlayerAdapter.Callback) | ` `[getCallback](https://developer.android.com/reference/android/support/v17/leanback/media/PlayerAdapter#getCallback())`() ` Gets callback for event of PlayerAdapter. | | ` long` | ` `[getCurrentPosition](https://developer.android.com/reference/android/support/v17/leanback/media/PlayerAdapter#getCurrentPosition())`() ` Returns the current position of the media item in milliseconds. | | ` long` | ` `[getDuration](https://developer.android.com/reference/android/support/v17/leanback/media/PlayerAdapter#getDuration())`() ` Returns the duration of the media item in milliseconds. | | ` long` | ` `[getSupportedActions](https://developer.android.com/reference/android/support/v17/leanback/media/PlayerAdapter#getSupportedActions())`() ` Return xor combination of values defined in PlaybackBaseControlGlue. | | ` boolean` | ` `[isPlaying](https://developer.android.com/reference/android/support/v17/leanback/media/PlayerAdapter#isPlaying())`() ` Returns true if media is currently playing. | | ` boolean` | ` `[isPrepared](https://developer.android.com/reference/android/support/v17/leanback/media/PlayerAdapter#isPrepared())`() ` | | ` void` | ` `[next](https://developer.android.com/reference/android/support/v17/leanback/media/PlayerAdapter#next())`() ` Optional method. | | ` void` | ` `[onAttachedToHost](https://developer.android.com/reference/android/support/v17/leanback/media/PlayerAdapter#onAttachedToHost(android.support.v17.leanback.media.PlaybackGlueHost))`(`[PlaybackGlueHost](https://developer.android.com/reference/android/support/v17/leanback/media/PlaybackGlueHost)` host) ` This method is called attached to associated[PlaybackGlueHost](https://developer.android.com/reference/android/support/v17/leanback/media/PlaybackGlueHost). | | ` void` | ` `[onDetachedFromHost](https://developer.android.com/reference/android/support/v17/leanback/media/PlayerAdapter#onDetachedFromHost())`() ` This method is called when current associated[PlaybackGlueHost](https://developer.android.com/reference/android/support/v17/leanback/media/PlaybackGlueHost)is attached to a different[PlaybackGlue](https://developer.android.com/reference/android/support/v17/leanback/media/PlaybackGlue)or[PlaybackGlueHost](https://developer.android.com/reference/android/support/v17/leanback/media/PlaybackGlueHost)is destroyed. | | ` abstract void` | ` `[pause](https://developer.android.com/reference/android/support/v17/leanback/media/PlayerAdapter#pause())`() ` Pauses the media player. | | ` abstract void` | ` `[play](https://developer.android.com/reference/android/support/v17/leanback/media/PlayerAdapter#play())`() ` Starts the media player. | | ` void` | ` `[previous](https://developer.android.com/reference/android/support/v17/leanback/media/PlayerAdapter#previous())`() ` Optional method. | | ` void` | ` `[rewind](https://developer.android.com/reference/android/support/v17/leanback/media/PlayerAdapter#rewind())`() ` Optional method. | | ` void` | ` `[seekTo](https://developer.android.com/reference/android/support/v17/leanback/media/PlayerAdapter#seekTo(long))`(long positionInMs) ` Seek to new position. | | ` final void` | ` `[setCallback](https://developer.android.com/reference/android/support/v17/leanback/media/PlayerAdapter#setCallback(android.support.v17.leanback.media.PlayerAdapter.Callback))`(`[PlayerAdapter.Callback](https://developer.android.com/reference/android/support/v17/leanback/media/PlayerAdapter.Callback)` callback) ` Sets callback for event of PlayerAdapter. | | ` void` | ` `[setProgressUpdatingEnabled](https://developer.android.com/reference/android/support/v17/leanback/media/PlayerAdapter#setProgressUpdatingEnabled(boolean))`(boolean enable) ` Implement this method to enable or disable progress updating. | | ` void` | ` `[setRepeatAction](https://developer.android.com/reference/android/support/v17/leanback/media/PlayerAdapter#setRepeatAction(int))`(int repeatActionIndex) ` Optional method. | | ` void` | ` `[setShuffleAction](https://developer.android.com/reference/android/support/v17/leanback/media/PlayerAdapter#setShuffleAction(int))`(int shuffleActionIndex) ` Optional method. | ||
| [](https://developer.android.com/reference/android/support/v17/leanback/media/MediaPlayerAdapter#)From class` java.lang.Object ` |-------------------|-------------------------------| | ` Object` | ` clone() ` | | ` boolean` | ` equals(Object arg0) ` | | ` void` | ` finalize() ` | | ` final Class` | ` getClass() ` | | ` int` | ` hashCode() ` | | ` final void` | ` notify() ` | | ` final void` | ` notifyAll() ` | | ` String` | ` toString() ` | | ` final void` | ` wait(long arg0, int arg1) ` | | ` final void` | ` wait(long arg0) ` | | ` final void` | ` wait() ` | ||
## Public constructors
### MediaPlayerAdapter
added in[version 26.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
MediaPlayerAdapter (Context context)
```
Constructor.
| Parameters ||
|-----------|------------------|
| `context` | `Context`
|
## Public methods
### getBufferedPosition
added in[version 26.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
long getBufferedPosition ()
```
Returns the current buffered position of the media item in milliseconds.
| Returns ||
|--------|--------|
| `long` |
|
### getCurrentPosition
added in[version 26.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
long getCurrentPosition ()
```
Returns the current position of the media item in milliseconds.
| Returns ||
|--------|--------|
| `long` |
|
### getDuration
added in[version 26.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
long getDuration ()
```
Returns the duration of the media item in milliseconds.
| Returns ||
|--------|--------|
| `long` |
|
### isPlaying
added in[version 26.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
boolean isPlaying ()
```
Returns true if media is currently playing.
| Returns ||
|-----------|--------|
| `boolean` |
|
### isPrepared
added in[version 26.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
boolean isPrepared ()
```
| Returns ||
|-----------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `boolean` | True if MediaPlayer OnPreparedListener is invoked and got a SurfaceHolder if[PlaybackGlueHost](https://developer.android.com/reference/android/support/v17/leanback/media/PlaybackGlueHost)provides SurfaceHolder.
|
### onAttachedToHost
added in[version 26.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
void onAttachedToHost (PlaybackGlueHost host)
```
This method is called attached to associated[PlaybackGlueHost](https://developer.android.com/reference/android/support/v17/leanback/media/PlaybackGlueHost).
### onDetachedFromHost
added in[version 26.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
void onDetachedFromHost ()
```
This method is called when current associated[PlaybackGlueHost](https://developer.android.com/reference/android/support/v17/leanback/media/PlaybackGlueHost)is attached to a different[PlaybackGlue](https://developer.android.com/reference/android/support/v17/leanback/media/PlaybackGlue)or[PlaybackGlueHost](https://developer.android.com/reference/android/support/v17/leanback/media/PlaybackGlueHost)is destroyed. Subclass may override. A typical implementation will release resources (e.g. MediaPlayer or connection to playback service) in this method.
### pause
added in[version 26.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
void pause ()
```
Pauses the media player.
### play
added in[version 26.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
void play ()
```
Starts the media player.
### release
added in[version 26.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
void release ()
```
Release internal MediaPlayer. Should not use the object after call release().
### reset
added in[version 26.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
void reset ()
```
Will reset the[MediaPlayer](https://developer.android.com/reference/android/media/MediaPlayer.html)and the glue such that a new file can be played. You are not required to call this method before playing the first file. However you have to call it before playing a second one.
### seekTo
added in[version 26.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
void seekTo (long newPosition)
```
Seek to new position.
| Parameters ||
|---------------|----------------------------------------------|
| `newPosition` | `long`: New position in milliseconds.
|
### setDataSource
added in[version 26.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
boolean setDataSource (Uri uri)
```
Sets the media source of the player witha given URI.
| Parameters ||
|-------|--------------|
| `uri` | `Uri`
|
| Returns ||
|-----------|---------------------------------------------------------------------|
| `boolean` | Returns`true`if uri represents a new media;`false`otherwise.
|
**See also:**
- [setDataSource(String)](https://developer.android.com/https://developer.android.com/reference/android/media/MediaPlayer#setDataSource(java.lang.String))
### setProgressUpdatingEnabled
added in[version 26.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
void setProgressUpdatingEnabled (boolean enabled)
```
Implement this method to enable or disable progress updating.
| Parameters ||
|-----------|----------------------------------------------------------------------|
| `enabled` | `boolean`: True to enable progress updating, false otherwise.
|
## Protected methods
### onError
added in[version 26.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
boolean onError (int what,
int extra)
```
Called to indicate an error.
| Parameters ||
|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `what` | `int`: the type of error that has occurred: - [MEDIA_ERROR_UNKNOWN](https://developer.android.com/reference/android/media/MediaPlayer.html#MEDIA_ERROR_UNKNOWN) - [MEDIA_ERROR_SERVER_DIED](https://developer.android.com/reference/android/media/MediaPlayer.html#MEDIA_ERROR_SERVER_DIED)
|
| `extra` | `int`: an extra code, specific to the error. Typically implementation dependent. - [MEDIA_ERROR_IO](https://developer.android.com/reference/android/media/MediaPlayer.html#MEDIA_ERROR_IO) - [MEDIA_ERROR_MALFORMED](https://developer.android.com/reference/android/media/MediaPlayer.html#MEDIA_ERROR_MALFORMED) - [MEDIA_ERROR_UNSUPPORTED](https://developer.android.com/reference/android/media/MediaPlayer.html#MEDIA_ERROR_UNSUPPORTED) - [MEDIA_ERROR_TIMED_OUT](https://developer.android.com/reference/android/media/MediaPlayer.html#MEDIA_ERROR_TIMED_OUT) - `MEDIA_ERROR_SYSTEM (-2147483648)`- low-level system error.
|
| Returns ||
|-----------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `boolean` | True if the method handled the error, false if it didn't. Returning false, will cause the[onPlayCompleted(PlayerAdapter)](https://developer.android.com/reference/android/support/v17/leanback/media/PlayerAdapter.Callback#onPlayCompleted(android.support.v17.leanback.media.PlayerAdapter))being called.
|
### onInfo
added in[version 26.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
boolean onInfo (int what,
int extra)
```
Called to indicate an info or a warning.
| Parameters ||
|---------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `what` | `int`: the type of info or warning. - [MEDIA_INFO_UNKNOWN](https://developer.android.com/reference/android/media/MediaPlayer.html#MEDIA_INFO_UNKNOWN) - [MEDIA_INFO_VIDEO_TRACK_LAGGING](https://developer.android.com/reference/android/media/MediaPlayer.html#MEDIA_INFO_VIDEO_TRACK_LAGGING) - [MEDIA_INFO_VIDEO_RENDERING_START](https://developer.android.com/reference/android/media/MediaPlayer.html#MEDIA_INFO_VIDEO_RENDERING_START) - [MEDIA_INFO_BUFFERING_START](https://developer.android.com/reference/android/media/MediaPlayer.html#MEDIA_INFO_BUFFERING_START) - [MEDIA_INFO_BUFFERING_END](https://developer.android.com/reference/android/media/MediaPlayer.html#MEDIA_INFO_BUFFERING_END) - `MEDIA_INFO_NETWORK_BANDWIDTH (703)`- bandwidth information is available (as`extra`kbps) - [MEDIA_INFO_BAD_INTERLEAVING](https://developer.android.com/reference/android/media/MediaPlayer.html#MEDIA_INFO_BAD_INTERLEAVING) - [MEDIA_INFO_NOT_SEEKABLE](https://developer.android.com/reference/android/media/MediaPlayer.html#MEDIA_INFO_NOT_SEEKABLE) - [MEDIA_INFO_METADATA_UPDATE](https://developer.android.com/reference/android/media/MediaPlayer.html#MEDIA_INFO_METADATA_UPDATE) - [MEDIA_INFO_UNSUPPORTED_SUBTITLE](https://developer.android.com/reference/android/media/MediaPlayer.html#MEDIA_INFO_UNSUPPORTED_SUBTITLE) - [MEDIA_INFO_SUBTITLE_TIMED_OUT](https://developer.android.com/reference/android/media/MediaPlayer.html#MEDIA_INFO_SUBTITLE_TIMED_OUT)
|
| `extra` | `int`: an extra code, specific to the info. Typically implementation dependent.
|
| Returns ||
|-----------|-----------------------------------------------------------------------------------------------------------------------|
| `boolean` | True if the method handled the info, false if it didn't. Returning false, will cause the info to be discarded.
|
### onSeekComplete
added in[version 26.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
void onSeekComplete ()
```
Called to indicate the completion of a seek operation.
-
## Interfaces
- [SurfaceHolderGlueHost](https://developer.android.com/reference/android/support/v17/leanback/media/SurfaceHolderGlueHost)
-
## Classes
- [MediaControllerAdapter](https://developer.android.com/reference/android/support/v17/leanback/media/MediaControllerAdapter)
- [MediaControllerGlue](https://developer.android.com/reference/android/support/v17/leanback/media/MediaControllerGlue)
- [MediaPlayerAdapter](https://developer.android.com/reference/android/support/v17/leanback/media/MediaPlayerAdapter)
- [PlaybackBannerControlGlue](https://developer.android.com/reference/android/support/v17/leanback/media/PlaybackBannerControlGlue)
- [PlaybackBaseControlGlue](https://developer.android.com/reference/android/support/v17/leanback/media/PlaybackBaseControlGlue)
- [PlaybackControlGlue](https://developer.android.com/reference/android/support/v17/leanback/media/PlaybackControlGlue)
- [PlaybackGlue](https://developer.android.com/reference/android/support/v17/leanback/media/PlaybackGlue)
- [PlaybackGlue.PlayerCallback](https://developer.android.com/reference/android/support/v17/leanback/media/PlaybackGlue.PlayerCallback)
- [PlaybackGlueHost](https://developer.android.com/reference/android/support/v17/leanback/media/PlaybackGlueHost)
- [PlaybackGlueHost.HostCallback](https://developer.android.com/reference/android/support/v17/leanback/media/PlaybackGlueHost.HostCallback)
- [PlaybackGlueHost.PlayerCallback](https://developer.android.com/reference/android/support/v17/leanback/media/PlaybackGlueHost.PlayerCallback)
- [PlaybackTransportControlGlue](https://developer.android.com/reference/android/support/v17/leanback/media/PlaybackTransportControlGlue)
- [PlayerAdapter](https://developer.android.com/reference/android/support/v17/leanback/media/PlayerAdapter)
- [PlayerAdapter.Callback](https://developer.android.com/reference/android/support/v17/leanback/media/PlayerAdapter.Callback)