private  void changeVolume(float detlaY){
   int max = audioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC);//获得最大音量
   int current = audioManager.getStreamVolume(AudioManager.STREAM_MUSIC);//获取当前音量

   int index = (int) (detlaY/screen_height*max*3);
   int volume = Math.max(current+index,0);
   audioManager.setStreamVolume(AudioManager.STREAM_MUSIC,volume,0);
   volume_seek.setProgress(volume);
}
private void changeBrightness(float detlaY){
   WindowManager.LayoutParams attributes = getWindow().getAttributes();
   mBrightness = attributes.screenBrightness;//获得当前屏幕的亮度
   float index = detlaY/screen_height/3;
   mBrightness += index;
   if(mBrightness > 1.0f){
       mBrightness = 1.0f;
   }
   if (mBrightness < 0.01f){
       mBrightness = 0.01f;
   }
   attributes.screenBrightness = mBrightness;
   getWindow().setAttributes(attributes);
}

copy神器用不了啦。。。。

我也在想这个问题