How to pre play video when playing another videoview B – Android

I'm interested in "pre buffering" videoview a when videoview B plays. Is this possible?

>I have two videoview instances. > only one videoview will be displayed at a given time, occupying the whole screen of the phone. > the purpose is to reduce the "black screen" when switching from videoview A and videoview B. > the application plays video lists one by one

The following codes were added on January 19, 2015

The following code grabs the mediaplayer reference of each player. When mediaplayer a starts rendering, mediaplayer B will call stop(), release(), setdatasource (URL), prepareasync(). When mediaplayer a completes, media player B will call start()

public class PrebufferingActivity extends Activity {
    private VideoView player1;
    private VideoView player2;
    private MediaPlayer mediaPlayer1;
    private MediaPlayer mediaPlayer2;
    public static final String URL_1 = "sample1.mp4";
    public static final String URL_2 = "sample2.mp4";

    public boolean FIRST_TIME = true;

    @SuppressLint("NewApi")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_prebuffering);

        player1 = (VideoView) findViewById(R.id.videoPlayer1);
        player2 = (VideoView) findViewById(R.id.videoPlayer2);

        player1.setOnTouchListener(new OnTouchListener(){

            @Override
            public boolean onTouch(View v, MotionEvent event) {
                // TODO Auto-generated method stub
                return false;
            }

        });

        player2.setOnTouchListener(new OnTouchListener(){

             @Override
             public boolean onTouch(View v, MotionEvent event) {
                // TODO Auto-generated method stub
                return false;
             }
        });
        player1.setOnCompletionListener(new OnCompletionListener(){
            @Override
            public void onCompletion(MediaPlayer mp)            {
                mediaPlayer2.start();

                // Toggle visibility. Player1 is completed. Hide Player1. Show Player2.
                player2.setVisibility(View.VISIBLE);
                player1.setVisibility(View.INVISIBLE);
            }
        });

        player1.setOnInfoListener(new OnInfoListener(){
            @Override
            public boolean onInfo(MediaPlayer mp, int what, int extra) 
            {
                if(what == MediaPlayer.MEDIA_INFO_VIDEO_RENDERING_START)
                {
                    mediaPlayer2.stop();
                    mediaPlayer2.release();

                    try {
                        mediaPlayer2.setDataSource(URL_2);
                        mediaPlayer2.prepareAsync();
                    } catch (Exception e) {
                        e.printStackTrace();
                    } 
                }
                return false;
            }
        });

        player1.setOnPreparedListener(new OnPreparedListener(){
            @Override
            public void onPrepared(MediaPlayer mp)          {
                mediaPlayer1 = mp;

                if(FIRST_TIME == true) {
                    mediaPlayer1.start();
                    player1.requestFocus();
                    FIRST_TIME = false;
                }
            }
        });

        player2.setOnCompletionListener(new OnCompletionListener(){

            @Override
            public void onCompletion(MediaPlayer mp)            {
                mediaPlayer1.start();
                player1.requestFocus();

                // Toggle visibility. Player2 is completed. Hide Player2. Show Player1.
                player1.setVisibility(View.VISIBLE);
                player2.setVisibility(View.INVISIBLE);
            }
        });

        player2.setOnInfoListener(new OnInfoListener(){
            @Override
            public boolean onInfo(MediaPlayer mp, int what, int extra) 
            {
                if(what == MediaPlayer.MEDIA_INFO_VIDEO_RENDERING_START)
                {
                    // Prepare Player 2
                    mediaPlayer1.stop();
                    mediaPlayer1.release();
                    try {
                        mediaPlayer1.setDataSource(PrebufferingActivity.URL_1);
                        mediaPlayer1.prepareAsync();
                    } catch (Exception e) {
                        e.printStackTrace();
                    } 
                }

                return false;
            }
        });

        player2.setOnPreparedListener(new OnPreparedListener(){
            @Override
            public void onPrepared(MediaPlayer mp) {
                mediaPlayer2 = mp;
            }
        });

        // Player 1
        player1.setMediaController(new MediaController(this));
        player1.setVideoURI(Uri.parse(URL_1));

        // Player 2
        player2.setMediaController(new MediaController(this));
        player2.setVideoURI(Uri.parse(URL_2));
    }

resolvent:

Suppose you use mediaplayer to process video playback in videoview, you can use prepareasync() method to achieve this. Prepareasync() method basically performs the same function as prepare(). This function is used to buffer and prepare video, but it can be completed asynchronously in the background

edit

I did something similar, but actually I used surfaceview. To process another stream, just create another mediaplayer instance. The following example will create two mediaplayer instances and buffer the first video. After the first video is prepared, the second video will be buffered. Then bind the first mediaplayer to surfaceview, And start the first video. When the first video is played, it will release the corresponding mediaplayer instance, attach an auxiliary instance, and automatically start the second video. The following example code has been tested and works normally:

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);
    }
}