ExoPlayer Short Tip 3: The Android Lifecycle

Player.kt

class Player {
    
    val player: ExoPlayer = ExoPlayerFactory.newInstance(...)
    var wasPlaying  = player.playWhenReady
    
    fun start() {
        wasPlaying = player.playWhenReady
        player.playWhenReady = true
    }
    
    fun pause() {
        wasPlaying = player.playWhenReady
        player.playWhenReady = false
    }
    
    fun resume() {
        player.playWhenReady = wasPlaying
    }
    
    fun stop() {
        player.stop()
    }
    
    fun release() {
        player.stop()
        player.release()
    }
}

class PlayerActivity: AppCompatActivity() {
    
    val player = Player()
    
    override fun onCreate(savedInstanceState: Bundle?) {
         player.start()
    }
    
    override fun onPause() {
        player.pause()
    }
    
    override fun onResume() {
        player.resume()
    }
    
    override fun onDestroy() {
        player.release()
    }
}