AudioManager音量控制调节
//降低音量，调出系统音量控制if(flag == 0){ mAudioManager.adjustStreamVolume(AudioManager.STREAM_MUSIC,AudioManager.ADJUST_LOWER, AudioManager.FX_FOCUS_NAVIGATION_UP);}//增加音量，调出系统音量控制else if(flag == 1){ mAudioManager.adjustStreamVolume(AudioManager.STREAM_MUSIC,AudioManager.ADJUST_RAISE, AudioManager.FX_FOCUS_NAVIGATION_UP);}