ep-videoactivity-ms.kt

override fun onCreate(savedInstanceState: Bundle?) {
    ...
    playerHolder = PlayerHolder(this, exoplayerview_activity_video, state)
    mediaSession = MediaSessionCompat(this, packageName)
    connector = MediaSessionConnector(mediaSession)
}

override fun onStart() {
    ...
    playerHolder.start()
    // Note: do not pass a null to the 3rd param below, it will cause a NPE
    connector.setPlayer(playerHolder.player, null) 
    mediaSession.isActive = true
}

override fun onStop() {
    ...
    playerHolder.stop()
    connector.setPlayer(null, null)
    mediaSession.isActive = false
}

override fun onDestroy() {
    ...
    mediaSession.release()
    playerHolder.release()
}