ep-video-activity.kt

class VideoActivity : AppCompatActivity() {

    lateinit var playerHolder: PlayerHolder
    val state = PlayerState()

    override fun onCreate(savedInstanceState: Bundle?) { 
        ...
        playerHolder = PlayerHolder(this, exoplayerview_activity_video, state)
    }

    override fun onStart() {
        super.onStart()
        playerHolder.start()
    }

    override fun onStop() {
        super.onStop()
        playerHolder.stop()
    }


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

}