BeepManager.java 文件源码

private MediaPlayer buildMediaPlayer(Context activity) {
  MediaPlayer mediaPlayer = new MediaPlayer();
  mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
  mediaPlayer.setOnCompletionListener(this);
  mediaPlayer.setOnErrorListener(this);

  AssetFileDescriptor file = activity.getResources().openRawResourceFd(keepass2android.plugin.qr.R.raw.beep);
  try {
    mediaPlayer.setDataSource(file.getFileDescriptor(), file.getStartOffset(), file.getLength());
    file.close();
    mediaPlayer.setVolume(BEEP_VOLUME, BEEP_VOLUME);
    mediaPlayer.prepare();
  } catch (IOException ioe) {
    Log.w(TAG, ioe);
    mediaPlayer = null;
  }
  return mediaPlayer;
}