How to Preset VideoView While Another VideoView B is Playing - Android

Question

I am interested in the possibility of "prebuffer" VideoView A during playback VideoView Bed and . Is it possible?

• I have two instances of VideoView.
• For a certain time, only one VideoView will be displayed, which displays the entire screen of the phone.
• The goal is to reduce the black screen when switching from VideoView A and VideoView B.
• The application plays the list of videos one by one.

Added code below January 19, 2015

The code below contains a link to each MediaPlayer Player. When MediaPlayer A starts rendering, MediaPlayer B will call stop (), release (), setDataSource (url), prepareAsync (). When MediaPlayer A is complete, 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));
    }

Answer 1

Assuming that you are using MediaPlayerto process the playback of your videos in VideoView, you can use the method prepareAsync()to achieve this. The method prepareAsync()essentially performs the same function as that prepare()used for buffering and preparing the video, except that it can execute asynchronously in the background.

EDIT

- , SurfaceView. , MediaPlayer. MediaPlayer . , , . MediaPlayer SurfaceView, . , MediaPlayer, , . :

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);
    }
}