如何显示与播放视频同步的进度条？

Question

我已使用此代码从网址加载视频

VideoView videoView = (VideoView) findViewById(R.id.videoView);

        //Use a media controller so that you can scroll the video contents
        //and also to pause, start the video.

        MediaController mediaController = new MediaController(LandScapeTv.this); 
        mediaController.setAnchorView(videoView);
        videoView.setMediaController(mediaController);
        videoView.setVideoURI(Uri.parse(url));
        videoView.start();

它工作正常但在播放视频时它暂时没有显示任何内容，即它的缓冲，是否有人可以建议如何将进度条与加载视频同步？