Get mp3 duration in android

Question

How to get mp3 track duration without creating MediaPlayer instance? I just need to show mp3 song length in mp3 file list, so I think that I shouldn't create MediaPlayer object for each of tracks in the list

And another:

sometimes MediaPlayer returns wrong duration of the song ( I think its so because bitrate of those files is dinamic ). How can I get right duration of the song?

Answer 1

       // load data file
       MediaMetadataRetriever metaRetriever = new MediaMetadataRetriever();
       metaRetriever.setDataSource(filePath);

String out = "";
       // get mp3 info

      // convert duration to minute:seconds
String duration =  
     metaRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION);
    Log.v("time", duration);
    long dur = Long.parseLong(duration);
    String seconds = String.valueOf((dur % 60000) / 1000);

    Log.v("seconds", seconds);
    String minutes = String.valueOf(dur / 60000);
    out = minutes + ":" + seconds;
    if (seconds.length() == 1) {
        txtTime.setText("0" + minutes + ":0" + seconds);
    }else {
        txtTime.setText("0" + minutes + ":" + seconds);
    }
    Log.v("minutes", minutes);
      // close object
       metaRetriever.release();