private void PlayVideo(SurfaceTexture surfaceTexture)
		{
			DoCleanUp();
			try
			{

				path = "http://qthttp.apple.com.edgesuite.net/1010qwoeiuryfg/sl.m3u8";
				if (path == "")
				{
					// Tell the user to provide a media file URL.
					Toast.MakeText(this, "Please edit MediaPlayerDemo_setSurface Activity, " + "and set the path variable to your media file path." + " Your media file must be stored on sdcard.", ToastLength.Long).Show();
					return;
				}
				// Create a new media player and set the listeners
				mMediaPlayer = new MediaPlayer(this, true);
				mMediaPlayer.SetDataSource(path);
				if (surf == null)
				{
					surf = new Surface (surfaceTexture);
				}
				mMediaPlayer.SetSurface(surf);
				mMediaPlayer.PrepareAsync();
				mMediaPlayer.SetOnBufferingUpdateListener(this);
				mMediaPlayer.SetOnCompletionListener(this);
				mMediaPlayer.SetOnPreparedListener(this);
				VolumeControlStream = Stream.Music;

			}
			catch (Exception e)
			{
				Log.Error(TAG, "error: " + e.Message, e);
			}
		}
        public void OnSurfaceTextureAvailable(SurfaceTexture surface, int width, int height)
        {
            nn_surface = new Surface (surface);

            RelativeLayout.LayoutParams l;
            DisplayMetrics metrics = new DisplayMetrics();
            nn_activity.WindowManager.DefaultDisplay.GetMetrics(metrics);
            l = new RelativeLayout.LayoutParams(metrics.HeightPixels, metrics.WidthPixels);
            l.AddRule(LayoutRules.CenterInParent);
            float scale = (metrics.HeightPixels * 1.0f) / (metrics.WidthPixels * 1.0f);
            textureview.ScaleX = scale;
            textureview.LayoutParameters=l;

            try {
                nn_mediaplayer= new MediaPlayer();
                //String uriPath = "android.resource://"+nn_activity.PackageName+"/raw/Tap5050_About";
                nn_mediaplayer.SetDataSource(nn_activity,global::Android.Net.Uri.Parse("android.resource://"+nn_activity.PackageName +"/"+ Resource.Raw.Tap5050_About));
                nn_mediaplayer.SetSurface(nn_surface);
                nn_mediaplayer.Prepare();
                nn_mediaplayer.Prepared+= (object sender, EventArgs e) => {
                    (sender as MediaPlayer).Start ();
                };
                nn_mediaplayer.Completion+= (object sender, EventArgs e) => {
                    (sender as MediaPlayer).SeekTo (0);
                    (sender as MediaPlayer).Pause ();
                };

            }catch(Exception e){
                Toast.MakeText (nn_activity,"Sorry,Can not play the video",ToastLength.Long).Show();
            }
        }