调用系统的媒体音量控制显示
调大声:
1 AudioManager audioMa=(AudioManager)this.getSystemService(Context.AUDIO_SERVICE);
2 audioMa.adjustStreamVolume(AudioManager.STREAM_MUSIC,AudioManager.ADJUST_RAISE,AudioManager.FX_FOCUS_NAVIGATION_UP);
调小声:
1 AudioManager audioMa=(AudioManager)this.getSystemService(Context.AUDIO_SERVICE);
2 audioMa.adjustStreamVolume(AudioManager.STREAM_MUSIC,AudioManager.ADJUST_LOWER,AudioManager.FX_FOCUS_NAVIGATION_UP);