关于控制音乐关闭的方法
AudioManager mAudioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);if (mAudioManager != null) {try {mAudioManager.requestAudioFocus(null,AudioManager.STREAM_MUSIC,AudioManager.AUDIOFOCUS_GAIN_TRANSIENT);} catch (Exception ex) {}}?注意看requestAudioFocus函数第三个参数的使用，AudioManager.AUDIOFOCUS_GAIN_TRANSIENT表示临时获取音乐播放硬件焦点。具体说明可以参考：官方文档?
