设置屏幕亮度的办法

 private void setBrightness(int brightness){       Log.i(this, "setBrightness"+ brightness);      Settings.System.putInt(mContext.getContentResolver(),        Settings.System.SCREEN_BRIGHTNESS,brightness);      Log.i(this, "getBrightness"+ brightness);      return ;   }   private int getBrightness(){      int brightness = 0 ;      try{          brightness = Settings.System.getInt(mContext.getContentResolver(),          Settings.System.SCREEN_BRIGHTNESS);      }catch(SettingNotFoundException ex){         Log.i(this, "getBrightness Exception");      }      Log.i(this, "getBrightness"+ brightness);      return brightness;   }   private void setBrightnessMode(int mode){       Log.i(this, "setBrightnessMode"+ mode);       Settings.System.putInt(mContext.getContentResolver(),               Settings.System.SCREEN_BRIGHTNESS_MODE,mode);   }   private int getBrightnessMode(){      int automatic;      try{          automatic = Settings.System.getInt(mContext.getContentResolver(),              Settings.System.SCREEN_BRIGHTNESS_MODE);      }catch(SettingNotFoundException notfound){          automatic = 0;      }      return automatic;   }