如何检查屏幕的开/关状态的onStop（）？ [英] how to check screen on/off status in onStop()?

问题描述

提到这里，当屏幕熄灭，说明的onStop（）将被调用。我需要检查开/关状态时，屏幕的的onStop（）我的活动的被调用。所以我注册了一个的BroadcastReceiver 对这些行动（ ACTION_SCREEN_ON 和 ACTION_SCREEN_OFF ）来记录开/关状态的电流（和他们正常工作，我已经登录！）。
但是当我关闭屏幕并检查的onStop ，它说的开/关状态屏幕上。为什么？我认为，接收器必须收到 ACTION_SCREEN_OFF 在的onStop 被称为有啥错？

as mentioned here, when the screen goes off, the onStop() of current Activity will be called. I need to check the screen on/off status when the onStop() of my Activity is called. so I have registered a BroadcastReceiver for these actions(ACTION_SCREEN_ON AND ACTION_SCREEN_OFF) to record the current on/off status(and they work properly, I have logged!).
but when I turn off the screen and check the on/off status in the onStop , it says the screen is on. why? I think the receiver must receive the ACTION_SCREEN_OFF before onStop is called so what's wrong?

推荐答案

您可以尝试使用PowerManager的系统服务用于此目的，我这里是和的官方文档（注意：此方法中添加了API 7级）：

You can try to use PowerManager system service for this purpose, here is example and official documentation (note this method was added in API level 7):

PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
boolean isScreenOn = pm.isScreenOn();

编辑：

isScreenOn（）方法是去precated API级别21。您应该是isInteractive来代替：

isScreenOn() method is deprecated API level 21. You should is isInteractive instead:

boolean isScreenOn = pm.isInteractive();

的http://developer.android.com/reference/android/os/PowerManager.html#isInteractive()

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