PlayerController_1.kt

class PlayerController(
    private val context: Context
) {

    private val exoPlayer by lazy {
        SimpleExoPlayer.Builder(context).build()
    }

    fun prepare(sourceUrl: String) {
        val dataSourceFactory: DataSource.Factory = DefaultDataSourceFactory(context,
            Util.getUserAgent(context, context.packageName))

        val source = ProgressiveMediaSource.Factory(dataSourceFactory)
            .createMediaSource(Uri.parse(
                // Big Buck Bunny from Blender Project
                sourceUrl
            ))

        exoPlayer.prepare(source)
    }

    fun setPlayerView(playerView: PlayerView) {
        playerView.player = exoPlayer
    }

}