Develop Reference

Android MediaPlayer with SurfaceView Fails on Prepare() Method

I am trying to build a video player using surface view and media player. My data source is an online video and I have enabled internet permission in manifest.
However, the video does not pay but throws a warning about prepare method without any hint at what the problem is like below:
W/System.err: at android.media.MediaPlayer._prepare(Native Method)
at android.media.MediaPlayer.prepare(MediaPlayer.java:1188)
at in.sashi.androidvideoplayer.MainActivity.surfaceCreated(MainActivity.java:64)
here's my code for this purpose:
public class MainActivity extends AppCompatActivity implements SurfaceHolder.Callback, MediaPlayer.OnPreparedListener, View.OnClickListener {
private static final String TAG = MainActivity.class.getSimpleName();
private SurfaceView surfaceView;
private ImageView playIV, backIV;
private TextView videoNameTV;
private MediaPlayer mediaPlayer;
private SurfaceHolder holder;
// private static final String VIDEO_URL = "https://www.youtube.com/watch?v=vEVd0QMjCc8";
private static final String VIDEO_URL = "http://mic.duytan.edu.vn:83/FINAL.mp4";
private static final String VIDEO_NAME = "FALL HARDER | BASKETBALL MOTIVATION";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
init();
}
private void init() {
surfaceView = findViewById(R.id.surfsceView);
playIV = findViewById(R.id.playIV);
backIV = findViewById(R.id.backIV);
videoNameTV = findViewById(R.id.videoNameTV);
videoNameTV.setText(VIDEO_NAME);
backIV.setOnClickListener(this);
playIV.setOnClickListener(this);
holder = surfaceView.getHolder();
holder.addCallback(this);
surfaceView.setKeepScreenOn(true);
mediaPlayer = new MediaPlayer();
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
mediaPlayer.setDisplay(holder);
try {
mediaPlayer.setDataSource(VIDEO_URL);
mediaPlayer.prepare();
mediaPlayer.setOnPreparedListener(this);
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
} catch (IOException e) {
e.printStackTrace();
}
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
}
#Override
public void onPrepared(MediaPlayer mp) {
mp.start();
}
#Override
public void onClick(View v) {
switch (v.getId()){
case R.id.backIV:
onBackPressed();
break;
case R.id.playIV:
if (mediaPlayer.isPlaying()){
Log.d(TAG, "Pause Clicked");
mediaPlayer.pause();
playIV.setImageResource(R.drawable.play);
} else {
Log.d(TAG, "Play Clicked");
mediaPlayer.start();
playIV.setImageResource(R.drawable.pause);
}
break;
}
}
#Override
protected void onPause() {
super.onPause();
collect();
}
private void collect() {
if (mediaPlayer != null){
mediaPlayer.release();
mediaPlayer = null;
}
}
}
Can anyone help me to figure this out? Thanks.

Use mediaplayer object which is being defined globally.
#Override
public void onPrepared(MediaPlayer mp) {
mediaPlayer.start();
}

How about this?
#Override
public void surfaceCreated(SurfaceHolder holder) {
mediaPlayer.setDisplay(holder);
try {
mediaPlayer.setDataSource(VIDEO_URL);
mediaPlayer.setOnPreparedListener(this);
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mediaPlayer.prepareAsync();
} catch (IOException e) {
e.printStackTrace();
}
}

Bar code detector reads QR-code several times

I`m trying to create bar code reader for my app, and it works fine, but the problem is when I keep focusing on QR-Code, it continues to read and never stops!!!
How can I make this happen only once?
In this code, it continues to "Toast" until I close the app, and when I use Intent for for closing the current activity and open another activity, the activity opens several times!!!
Here is the code:
public class BarcodeCaptureActivity extends AppCompatActivity {
private SurfaceView camera_preview;
TextView text;
BarcodeDetector barcodeDetector;
CameraSource cameraSource;
final int requestCameraPermissionID = 1001;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_barcode_capture);
camera_preview = (SurfaceView) findViewById(R.id.camera_preview);
text = (TextView) findViewById(R.id.text);
barcodeDetector = new BarcodeDetector.Builder(this).setBarcodeFormats(Barcode.QR_CODE).build();
cameraSource = new CameraSource.Builder(this, barcodeDetector).setRequestedPreviewSize(640, 480).build();
camera_preview.getHolder().addCallback(new SurfaceHolder.Callback() {
#Override
public void surfaceCreated(SurfaceHolder holder) {
if (ActivityCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(BarcodeCaptureActivity.this, new String[]{Manifest.permission.CAMERA},requestCameraPermissionID);
return;
}
try {
cameraSource.start(camera_preview.getHolder());
} catch (IOException e) {
e.printStackTrace();
}
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
cameraSource.stop();
}
});
barcodeDetector.setProcessor(new Detector.Processor<Barcode>() {
#Override
public void release() {
}
#Override
public void receiveDetections(Detector.Detections<Barcode> detections) {
final SparseArray<Barcode> qrcode = detections.getDetectedItems();
if (qrcode.size() != 0){
text.post(new Runnable() {
#Override
public void run() {
Vibrator vibrator = (Vibrator) getApplicationContext().getSystemService(Context.VIBRATOR_SERVICE);
vibrator.vibrate(1000);
text.setText(qrcode.valueAt(0).displayValue);
String title = text.getText().toString();
Toast.makeText(BarcodeCaptureActivity.this, "" + title, Toast.LENGTH_SHORT).show();
finish();
}
});
}
}
});
}
Thank for any help...
UPDATE
Problem solved with adding onDestroy and onPause methods...
#Override
protected void onPause() {
super.onPause();
cameraSource.stop();
}
#Override
protected void onDestroy() {
super.onDestroy();
cameraSource.stop();
}

MediaPlayer's subtitle feature is not working (SRT file)

I am trying to show the subtitle from the .srt file. (For Android 4.1+)
Both mp4 file and srt file exist in the device.
public class MainActivity extends Activity implements SurfaceHolder.Callback, OnPreparedListener{
MediaPlayer mediaPlayer;
SurfaceHolder surfaceHolder;
SurfaceView playerSurfaceView;
TextView tv_subtitle;
String videoSrc = Environment.getExternalStorageDirectory().getPath() + "/video.mp4";
String subTitleSrc = Environment.getExternalStorageDirectory().getPath() + "/sub.srt";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
playerSurfaceView = (SurfaceView)findViewById(R.id.playersurface);
tv_subtitle = (TextView)findViewById(R.id.tv_subtitle);
surfaceHolder = playerSurfaceView.getHolder();
surfaceHolder.addCallback(this);
}
#Override
public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {
}
#Override
public void surfaceCreated(SurfaceHolder arg0) {
try {
mediaPlayer = new MediaPlayer();
mediaPlayer.setDisplay(surfaceHolder);
mediaPlayer.setDataSource(videoSrc);
mediaPlayer.setOnTimedTextListener(new MediaPlayer.OnTimedTextListener() {
#Override
public void onTimedText(final MediaPlayer mediaPlayer, final TimedText timedText) {
if (timedText != null) {
Log.d("test", "subtitle: " + timedText.getText());
}
}
});
mediaPlayer.addTimedTextSource(subTitleSrc, MediaPlayer.MEDIA_MIMETYPE_TEXT_SUBRIP);
mediaPlayer.prepare();
mediaPlayer.setOnPreparedListener(this);
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
} catch (Exception e) {
}
}
#Override
public void surfaceDestroyed(SurfaceHolder arg0) {
}
#Override
public void onPrepared(MediaPlayer mp) {
mediaPlayer.start();
}
}
Layout:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<SurfaceView
android:id="#+id/playersurface"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
<TextView
android:layout_gravity="center"
android:id="#+id/tv_subtitle"
android:textColor="#android:color/holo_red_dark"
android:textSize="20sp"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
OnTimedTextListener is not being called. My Target SDK is 22 and my devices are above Android 4.1
Am I missing anything?

I found the Answer.
Credit: Looking for a working example of addTimedTextSource for adding subtitle to a video from an .srt file in Android 4.1
mediaPlayer.selectTrack() method was missing in my code.
Here's the complete code:
public class MainActivity extends Activity implements SurfaceHolder.Callback, OnPreparedListener{
MediaPlayer mediaPlayer;
SurfaceHolder surfaceHolder;
SurfaceView playerSurfaceView;
TextView tv_subtitle;
String videoSrc = Environment.getExternalStorageDirectory().getPath() + "/video.mp4";
String subTitleSrc = Environment.getExternalStorageDirectory().getPath() + "/sub.srt";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
playerSurfaceView = (SurfaceView)findViewById(R.id.playersurface);
tv_subtitle = (TextView)findViewById(R.id.tv_subtitle);
surfaceHolder = playerSurfaceView.getHolder();
surfaceHolder.addCallback(this);
}
#Override
public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {
}
#Override
public void surfaceCreated(SurfaceHolder arg0) {
try {
mediaPlayer = new MediaPlayer();
mediaPlayer.setDisplay(surfaceHolder);
mediaPlayer.setDataSource(videoSrc);
mediaPlayer.setOnPreparedListener(this);
mediaPlayer.prepare();
mediaPlayer.addTimedTextSource(subTitleSrc, MediaPlayer.MEDIA_MIMETYPE_TEXT_SUBRIP);
int textTrackIndex = findTrackIndexFor(
MediaPlayer.TrackInfo.MEDIA_TRACK_TYPE_TIMEDTEXT, mediaPlayer.getTrackInfo());
if (textTrackIndex >= 0) {
mediaPlayer.selectTrack(textTrackIndex);
} else {
Log.w("test", "Cannot find text track!");
}
mediaPlayer.setOnTimedTextListener(new MediaPlayer.OnTimedTextListener() {
#Override
public void onTimedText(final MediaPlayer mediaPlayer, final TimedText timedText) {
if (timedText != null) {
Log.d("test", "subtitle: " + timedText.getText());
}
}
});
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
} catch (Exception e) {
}
}
private int findTrackIndexFor(int mediaTrackType, MediaPlayer.TrackInfo[] trackInfo) {
int index = -1;
for (int i = 0; i < trackInfo.length; i++) {
if (trackInfo[i].getTrackType() == mediaTrackType) {
return i;
}
}
return index;
}
#Override
public void surfaceDestroyed(SurfaceHolder arg0) {
}
#Override
public void onPrepared(MediaPlayer mp) {
mediaPlayer.start();
}
}

How to prepare mediaplayer in android while another playing?

I using MediaPlayerto play video from http stream is any solution to prepare second media player with another http url while first one still playing?
I want to play two videos without black screen between them, when first one end second start immediately.
Here is my code:
public class VideoActivity extends Activity implements SurfaceHolder.Callback {
private MediaPlayer mediaPlayer;
private SurfaceHolder surfaceHolder;
private SurfaceView playerSurfaceView;
private String videoSrc = "http://192.168.1.101:8090/api/video/";
private String android_id;
private MediaPlayer next;
private static boolean firstCall = true;
private String secondVideoSrc = "http://192.168.1.101:8090/api/secondvideo/";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_video);
playerSurfaceView = (SurfaceView)findViewById(R.id.playersurface);
surfaceHolder = playerSurfaceView.getHolder();
surfaceHolder.addCallback(this);
GetDeviceId();
videoSrc += android_id;
secondVideoSrc += android_id;
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
prepareVideoPlayer();
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
}
private void GetDeviceId() {
android_id = Settings.Secure.getString(getBaseContext().getContentResolver(),
Settings.Secure.ANDROID_ID);
}
private void prepareVideoPlayer() {
try {
mediaPlayer = new MediaPlayer();
mediaPlayer.setDisplay(surfaceHolder);
mediaPlayer.setDataSource(this, Uri.parse(videoSrc));
mediaPlayer.setScreenOnWhilePlaying(true);
mediaPlayer.prepareAsync();
mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mp) {
if(firstCall) {
mediaPlayer.start();
firstCall = false;
}
new AsyncPrepareNext().execute();
}
});
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
next.start();
}
});
}
catch(Exception ex) {
}
}
private void prepareNext() {
try {
next = new MediaPlayer();
next.setDisplay(surfaceHolder);
next.setDataSource(this, Uri.parse(secondVideoSrc));
next.setScreenOnWhilePlaying(true);
next.prepareAsync();
next.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mp) {
}
});
next.setAudioStreamType(AudioManager.STREAM_MUSIC);
next.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
}
});
}
catch(Exception ex) {
}
}
private class AsyncPrepareNext extends AsyncTask<Void,Void,Void> {
#Override
protected Void doInBackground(Void... params) {
prepareNext();
return null;
}
}
}
When i run this first video starts for 2 or 3 seconds and then stop with some errors like media server died, audio flinger died, error (100,0), error (38,0)

You'll probably need to implement the OnPreparedListener() and OnCompletedListener() to accomplish this and you might need 2 media players for it as well.
#Override
public void onPrepared(MediaPlayer mp){
// Set Video Source for second video
mp.setDataSource(path);
// Prepare second video
mp.prepareAsync();
}
#Override
public void onCompletion(MediaPlayer mp){
// Start second video here
mp.start();
}
and set them like this:
mediaPlayer.setOnPreparedListener(new OnPreparedListener());
mediaPlayer.setOnCompletedListener(new OnCompletionListener());

MediaPlayer.setDisplay() in android

I am creating a video player using MediaPlayer class in android. I set a SurfaceHolder in MediaPlayer.setDisplay(), it shows video successfully but when this activity resumed again then no video is diplayed. So what is wrong ??
The Code is:
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
player = new MediaPlayer();
surface = (SurfaceView)findViewById(R.id.surface);
surface.setOnClickListener(new OnClickListener()
{
#Override
public void onClick(View v)
{
VideoDemo.this.startActivity(new Intent(VideoDemo.this, AnotherActivity.class));//Video not displayed when return from this activity by pressing back button
}
});
holder = surface.getHolder();
holder.addCallback(this);
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
try
{
String songName = Environment.getExternalStorageDirectory().toString()+File.separator+"1.mp4";
player.setDataSource(songName);
player.prepare();
player.start();
}
catch (Exception e)
{
e.printStackTrace();
}
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height)
{
player.setDisplay(holder);
}
#Override
public void surfaceCreated(SurfaceHolder holder)
{
Log.d(TAG, "surfaceCreated() is called ************ holder.getSurface() = "+holder.getSurface());
}
#Override
public void surfaceDestroyed(SurfaceHolder holder)
{
Log.d(TAG, "surfaceDestroyed() is called ************");
}

I have initialized media player again and now its working fine