void Start()
{   
  var MediaPlayer =GetComponent<MediaPlayer>();
  MediaPlayer .Events.AddListener(OnMediaPlayerEvent);
  MediaPlayer .Rewind(true);
  MediaPlayer .Play();
}
private void OnMediaPlayerEvent(MediaPlayer arg0, MediaPlayerEvent.EventType arg1, ErrorCode arg2)
    {
        switch (arg1)
        {
            case MediaPlayerEvent.EventType.Started:
                print("startedEvent开始事件触发");
                
                break;
            case MediaPlayerEvent.EventType.FinishedPlaying:
                print("finishedEvent结束事件触发");
               
                break;
        }
    }