TerminalManager.java 文件源码

private void enableMediaPlayer() {
    mediaPlayer = new MediaPlayer();

    float volume = prefs.getFloat(PreferenceConstants.BELL_VOLUME,
            PreferenceConstants.DEFAULT_BELL_VOLUME);

    mediaPlayer.setAudioStreamType(AudioManager.STREAM_NOTIFICATION);

    AssetFileDescriptor file = res.openRawResourceFd(R.raw.bell);
    try {
        mediaPlayer.setLooping(false);
        mediaPlayer.setDataSource(file.getFileDescriptor(), file
                .getStartOffset(), file.getLength());
        file.close();
        mediaPlayer.setVolume(volume, volume);
        mediaPlayer.prepare();
    } catch (IOException e) {
        Log.e(TAG, "Error setting up bell media player", e);
    }
}