MediaExtractor extractor = new MediaExtractor();
   extractor.setDataSource(MEDIA_PATH_To_File_On_SDCARD);
  for (i = 0; i < extractor.getTrackCount(); i++) {
            MediaFormat format = extractor.getTrackFormat(i);
            String mime = format.getString(MediaFormat.KEY_MIME);
            if (mime.startsWith("audio/")) {
                extractor.selectTrack(i);
                decoder = MediaCodec.createDecoderByType(mime);

                if(decoder != null)
                {
                   decoder.configure(format, null, null, 0);
                }

                break;
            }
        }