目前在做电视相关的视频切换，MediaPlayer+SurfaceView 切换一直有黑屏的现象。

电视盒子版本Android 4.0.3 还不支持硬加速(盒子本身问题)，所以这个TextureView不能使用，surfaceView一直有黑屏问题。

stackoverflow两个Mediaplayer 无黑屏切换

public class StreamingActivity extends Activity implements SurfaceHolder.Callback, MediaPlayer.OnPreparedListener, MediaPlayer.OnCompletionListener
{

    MediaPlayer     mediaPlayerPrimary;
    MediaPlayer     mediaPlayerSecondary;
    SurfaceHolder   surfaceHolder;
    SurfaceView     surfaceView;
    String          videoSourcePrimary = "videoSourcePrimaryURL";
    String          videoSourceSecondary = "videoSourceSecondaryURL";

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.streaming_activity_layout);
        /** Create SurfaceView */
        surfaceView = (SurfaceView) findViewById(R.id.surface_view);
        surfaceHolder = surfaceView.getHolder();
        surfaceHolder.addCallback(this);
    }

    @Override
    public void surfaceCreated(SurfaceHolder arg0)
    {
        try
        {
            /** Create MediaPlayer(s) */
            mediaPlayerPrimary = new MediaPlayer();
            mediaPlayerSecondary = new MediaPlayer();
            /** Attach primary MediaPlayer to SurfaceView */
            mediaPlayerPrimary.setDisplay(surfaceHolder);
            /** Set sources */
            mediaPlayerPrimary.setDataSource(videoSourcePrimary);
            mediaPlayerSecondary.setDataSource(videoSourceSecondary);
            /** Prepare MediaPlayer(s) */
            mediaPlayerPrimary.prepare();
            mediaPlayerSecondary.prepareAsync();
            /** Set listeners */
            mediaPlayerPrimary.setOnPreparedListener(this);
            mediaPlayerPrimary.setOnCompletionListener(this);
            mediaPlayerSecondary.setOnPreparedListener(this);
            mediaPlayerSecondary.setOnCompletionListener(this);
            /** Set audio stream type */
            mediaPlayerPrimary.setAudioStreamType(AudioManager.STREAM_MUSIC);
            mediaPlayerSecondary.setAudioStreamType(AudioManager.STREAM_MUSIC);
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
    }

    @Override
    public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3)
    {
    }

    @Override
    public void surfaceDestroyed(SurfaceHolder arg0)
    {
    }

    @Override
    public void onPrepared(MediaPlayer mp)
    {
        if (mp == mediaPlayerPrimary)
        {
            /** First video ready, start playback */
            mediaPlayerPrimary.start();
        }
        else if (mp == mediaPlayerSecondary)
        {
            /** Second video is ready */
        }
    }

    @Override
    public void onCompletion(MediaPlayer mp)
    {
        /** First video is completed, start second video */
        mediaPlayerPrimary.release();
        mediaPlayerSecondary.setDisplay(surfaceHolder);
        mediaPlayerSecondary.start();

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu)
    {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.streaming_activity_menu, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item)
    {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings)
        {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}