MediaPlayer onCompletion is not being called accurately

Question

In my app i have created an audio player (only WAV files) using MediaPlayer API. But the player doesn't give callback to onCompletion Listener everytime. Sometimes it gives callback but not everytime. I am doing some audio processing on wav file , like insertion and overwriting.

Is it because any missing in audio header? Why it doesn't give callback when the playback is completed?

In case the app is on sleep. Try this https://stackoverflow.com/questions/4813486/oncompletion-isnt-being-called-when-i-would-expect-it-to/60911323#60911323 — SJX, Mar 29 '20 at 09:28

score 6 · Answer 1 · answered Jul 01 '13 at 05:38

Make sure that the headers of file is set correctly. If somethings in header is missing callback to the onCompletion may not occur.

If mediaplayer is playing a .wav file, seeking may happen correctly but a jerking will be there . So when the playingback completes there will be a differecnce of 0-1000 ms between total duration of file and onCompletion respectively. So if such a situation comes you should guess that as onColmpletion and do what you wanted. Thats a bit tricky way to get the onCompletion.

I faced the same problem while playing a .wav file with the mediaplayer. This is not a good way to solve this issue, but I tackled the same problem like this when i was having the same situation. Hope this will help you too in some ways.

score 3 · Answer 2 · edited May 23 '17 at 12:32

3

It seems you have to call setOnCompletionListener AFTER calling start(). Take a look here: https://stackoverflow.com/a/19555480/1860130

Worked for me.

edited May 23 '17 at 12:32

Community

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answered Feb 01 '17 at 22:30

bernardo.g

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score 2 · Answer 3 · answered Mar 24 '17 at 14:17

2

In order to get the onCompletion() function called you should disable looping with a call mediaPlayer.setLooping(false);

answered Mar 24 '17 at 14:17

Hack06

963
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score 2 · Answer 4 · answered Jul 13 '17 at 18:51

2

Make sure the MediaPlayer is not a local(temporal) variable. Since the local variable will be collected by GC. In that case, the onCompletion will have no chance to be invoked.

answered Jul 13 '17 at 18:51

DàChún

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score 0 · Answer 5 · answered Jun 21 '13 at 07:20

You're using the correct Method but have you passed any code in the "// do some tasks here when playback completes " AREA.

If not then the callback wont make any sense.

mMediaPlayer.setOnCompletionListener(new OnCompletionListener() {

   public void onCompletion(MediaPlayer mp) {

        Toast.makeText(getApplicationContext(),"Playback Completes", Toast.LENGTH_SHORT).show();
    }
});

This method will pop a Toast on completion of playback.

score 0 · Answer 6 · answered Oct 05 '17 at 11:30

Return true to OnErrorListner method on MediaPlayer

@Override
public boolean onError(MediaPlayer mp, int what, int extra) {
    //Invoked when there has been an error during an asynchronous operation
    switch (what) {
        case MediaPlayer.MEDIA_ERROR_NOT_VALID_FOR_PROGRESSIVE_PLAYBACK:
            Log.e("MediaPlayer Error", "MEDIA ERROR NOT VALID FOR PROGRESSIVE PLAYBACK " + extra);
            break;
        case MediaPlayer.MEDIA_ERROR_SERVER_DIED:
            Log.e("MediaPlayer Error", "MEDIA ERROR SERVER DIED " + extra);
            break;
        case MediaPlayer.MEDIA_ERROR_UNKNOWN:
            Log.e("MediaPlayer Error", "MEDIA ERROR UNKNOWN " + extra);
            break;
    }
    return true;
}

score -3 · Answer 7 · answered Jun 29 '13 at 16:04

-3

Try to use a sleep method once recording is completed. Also use; .prepare() before the placeback occurs , to avoid crashes.

answered Jun 29 '13 at 16:04

Zen

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MediaPlayer onCompletion is not being called accurately

7 Answers7