MainActivity.java 文件源码

private MediaPlayer buildMediaPlayer(Context activity) {
    mediaPlayer = new MediaPlayer();
    mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
    mediaPlayer.setOnCompletionListener(this);
    // mediaPlayer.setOnErrorListener(this);
    try {
        AssetFileDescriptor file = activity.getResources()
                .openRawResourceFd(R.raw.beep);
        try {
            mediaPlayer.setDataSource(file.getFileDescriptor(),
                    file.getStartOffset(), file.getLength());
        } finally {
            file.close();
        }
        mediaPlayer.setVolume(0.10f, 0.10f);
        mediaPlayer.prepare();
        return mediaPlayer;
    } catch (IOException ioe) {
        mediaPlayer.release();
        return null;
    }
}