我用下面的设置系统自动亮度模式和水平：

I'm using the following to set the system auto brightness mode and level:

    android.provider.Settings.System.putInt(y.getContentResolver(),Settings.System.SCREEN_BRIGHTNESS_MODE, 0);
    android.provider.Settings.System.putInt(y.getContentResolver(),Settings.System.SCREEN_BRIGHTNESS, y.brightness1);

我可以改变或关闭自动brighess，并设置不同的等级。设置似乎正确应用 - 我可以去到设置 - >显示 - >亮度和whanever设置我设置实际上是正确显示。但是，实际的屏幕并没有改变它的亮度。如果我只需轻按在显示设置滑块，然后一切都被应用。

I can change auto-brighess on and off, and set different levels. The settings seem to be applied properly -- I can go to into Settings --> Display --> Brightness, and whanever setting I set is actually shown correctly. However, the actual screen isn't changing its brightness. If i just tap on the slider in Display Settings, then everything gets applied.

我shoudl提到，我正在withat主要活动的应用程序，而且这些设置是在的BroadcastReceiver得到应用。我曾尝试创建一个虚拟活动和测试的东西有，但得到了同样的结果。

I shoudl mention that I'm running an app withat a main activity, and these settings are getting applied in the BroadcastReceiver. I did try to create a dummy activity and tested the stuff there, but got the same results.

推荐答案

OK，找到了答案在这里： 刷新从插件的显示？

OK, found the answer here: Refreshing the display from a widget?

基本上，不得不做出这样的处理亮度变化的透明活动。什么是不是在帖子中提到的是，你必须做的：

Basically, have to make a transparent activity that processes the brightness change. What's not mentioned in the post is that you have to do:

Settings.System.putInt(y.getContentResolver(),Settings.System.SCREEN_BRIGHTNESS_MODE, 0);
Settings.System.putInt(y.getContentResolver(),Settings.System.SCREEN_BRIGHTNESS, brightnessLevel); 

然后执行

WindowManager.LayoutParams lp = getWindow().getAttributes();
    lp.screenBrightness = brightness; 
    getWindow().setAttributes(lp);

如果你调用finish（）应用更改之后，亮度会从来没有真正改变，因为布局必须创建亮度设置应用之前。所以，我结束了创建一个线程，有一个300毫秒的延迟，然后叫完成（）。

And if you call finish() right after applying the changes, brightness will never actually change because the layout has to be created before the brightness settings is applied. So I ended up creating a thread that had a 300ms delay, then called finish().