Android音量控制调节


    //音量控制,初始化定义  
    AudioManager mAudioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);  
    //最大音量  
    int maxVolume = mAudioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC);  
    //当前音量  
    int currentVolume = mAudioManager.getStreamVolume(AudioManager.STREAM_MUSIC);  


直接控制音量的多少:

    if(isSilent){  
      mAudioManager.setStreamVolume(AudioManager.STREAM_MUSIC, 0, 0);  
    }else{  
      mAudioManager.setStreamVolume(AudioManager.STREAM_MUSIC, tempVolume, 0); //tempVolume:音量绝对值  
    }  



以一步步长控制音量的增减,并弹出系统默认音量控制条:

//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);  
}  


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