ademirqueiroga

class SimplePlaybackTransportControlGlue(...) {
    ...
    override fun onPlayCompleted() {
        super.onPlayCompleted()
        playbackState = PlaybackStateCompat.STATE_NONE
    }

    fun onStartBuffering() {
        playbackState = PlaybackStateCompat.STATE_BUFFERING
    }

ademirqueiroga

private fun invalidatePlaybackState() {
    val playbackStateBuilder = PlaybackStateCompat.Builder()
        .setState(playbackState, currentPosition, 1.0F)
        .setActions(mediaSessionSupportedActions())
        .setBufferedPosition(bufferedPosition)
    mediaSession.setPlaybackState(playbackStateBuilder.build())
}

ademirqueiroga

private var playbackState: Int = -1
    set(value) {
        if (field != value) {
            field = value
            invalidatePlaybackState() // We'll cover this function later on.
        }
    }

ademirqueiroga

fun mediaSessionSupportedActions(): Long {
  return PlaybackStateCompat.ACTION_PAUSE xor
          PlaybackStateCompat.ACTION_PLAY xor
          PlaybackStateCompat.ACTION_PLAY_PAUSE xor
          PlaybackStateCompat.ACTION_REWIND xor
          PlaybackStateCompat.ACTION_FAST_FORWARD xor
          PlaybackStateCompat.ACTION_SKIP_TO_NEXT xor
          PlaybackStateCompat.ACTION_SKIP_TO_PREVIOUS
}

ademirqueiroga

public final static int STATE_NONE = 0;
public final static int STATE_STOPPED = 1;
public final static int STATE_PAUSED = 2;
public final static int STATE_PLAYING = 3;
public final static int STATE_FAST_FORWARDING = 4;
public final static int STATE_REWINDING = 5;
public final static int STATE_BUFFERING = 6;
public final static int STATE_ERROR = 7;
public final static int STATE_CONNECTING = 8;
public final static int STATE_SKIPPING_TO_PREVIOUS = 9;

ademirqueiroga

  private inner class SimpleMediaSessionCallback : MediaSessionCompat.Callback() {
      override fun onPlay() = this@SimplePlaybackTransportControlGlue.play()
      override fun onPause() = this@SimplePlaybackTransportControlGlue.pause()
      override fun onSkipToNext() = this@SimplePlaybackTransportControlGlue.next()
      override fun onSkipToPrevious() = this@SimplePlaybackTransportControlGlue.previous()
      override fun onRewind() = this@SimplePlaybackTransportControlGlue.rewind()
      override fun onFastForward() = this@SimplePlaybackTransportControlGlue.fastForward()
      override fun onSeekTo(pos: Long) = this@SimplePlaybackTransportControlGlue.seekTo(pos)
  }

ademirqueiroga

class SimplePlaybackTransportControlGlue(
    context: Context,
    playerAdapter: MediaPlayerAdapter,
) : PlaybackTransportControlGlue<MediaPlayerAdapter>(context, playerAdapter) {

    private val mediaSession = MediaSessionCompat(context, "VideoPlayback")
    
    init {
        mediaSession.setCallback(SimpleMediaSessionCallback())
    }

ademirqueiroga

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android">  
  ...
  <uses-permission android:name="com.amazon.permission.media.session.voicecommandcontrol" />
  ...
  <application>
    <meta-data
            android:name="com.amazon.voice.supports_background_media_session"
            android:value="true" />
  <application/>    

ademirqueiroga

<style name="Widget.Leanback.Headers.VerticalGridView">
    <item name="android:background">?attr/defaultBrandColor</item>
    <item name="android:paddingStart">?attr/browsePaddingStart</item>
    <item name="focusOutFront">true</item>
    <item name="focusOutEnd">true</item>
    <item name="android:verticalSpacing">@dimen/lb_browse_headers_vertical_spacing</item>
    <item name="android:focusable">true</item>
    <item name="android:focusableInTouchMode">true</item>
    <item name="android:contentDescription">@string/lb_navigation_menu_contentDescription</item>
</style>

ademirqueiroga

override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
    super.onViewCreated(view, savedInstanceState)
    val height = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 60f, resources.displayMetrics).toInt()
    val headerPresenterSelector = headersSupportFragment.presenterSelector as ClassPresenterSelector
    headerPresenterSelector
        .addClassPresenter(IconSectionRow::class.java, IconSectionPresenter())
        .addClassPresenter(DividerRow::class.java, SpaceDividerPresenter(height))
}