屏幕亮度设置

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1、Android的屏幕亮度好像在2.1+的时候提供了自动调节的功能，所以，如果当开启自动调节功能的时候，我们进行调节好像是没有一点作用的，这点让我很是无语，结果只有进行判断，看是否开启了屏幕亮度的自动调节功能。/**    *判断是否开启了自动亮度调节    *    *@paramaContext    *@return    */   publicstaticbooleanisAutoBrightness(ContentResolveraContentResolver){       booleanautomicBrightness=false;

2、       try{           automicBrightness=Settings.System.getInt(aContentResolver,                   Settings.System.SCREEN_BRIGHTNESS_MODE)==Settings.System.SCREEN_BRIGHTNESS_MODE_AUTOMATIC;       }catch(SettingNotFoundExceptione){           e.printStackTrace();       }       r

3、eturnautomicBrightness;   }然后就是要觉得当前的亮度了，这个就比较纠结了：/**    *获取屏幕的亮度    *    *@paramactivity    *@return    */   publicstaticintgetScreenBrightness(Activityactivity){       intnowBrightnessValue=0;       ContentResolverresolver=activity.getContentResolver();       try{           

4、nowBrightnessValue=android.provider.Settings.System.getInt(                   resolver,Settings.System.SCREEN_BRIGHTNESS);       }catch(Exceptione){           e.printStackTrace();       }       returnnowBrightnessValue;   }那如何修改屏幕的亮度呢？/**    *设置亮度    *    *@paramactivity    *@

5、parambrightness    */   publicstaticvoidsetBrightness(Activityactivity,intbrightness){       //Settings.System.putInt(activity.getContentResolver(),       //Settings.System.SCREEN_BRIGHTNESS_MODE,       //Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL);       WindowManager.Layo

6、utParamslp=activity.getWindow().getAttributes();       lp.screenBrightness=Float.valueOf(brightness)*(1f/255f);       activity.getWindow().setAttributes(lp);   }那么，能设置了，但是为什么还是会出现，设置了，没反映呢？嘿嘿，那是因为，开启了自动调节功能了，那如何关闭呢？这才是最重要的：/**    *停止自动亮度调节    *    *@paramactivity    */   publi

7、cstaticvoidstopAutoBrightness(Activityactivity){       Settings.System.putInt(activity.getContentResolver(),               Settings.System.SCREEN_BRIGHTNESS_MODE,               Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL);   }能开启，那自然应该能关闭了哟哟，那怎么关闭呢？很简单的：/**    *开启亮度自动调节    *

8、    *@paramactivity    */   publicstaticvoidstartAutoBrightne