如何找出屏幕状态在Android设备上？ [英] how to find out screen status on an android device?

问题描述

有没有办法找出Android设备屏幕上或没有广播接收器？我想就通过服务，由管理员报警器调用分钟间隔更新。我也想preserve电池寿命。所以，如果设备屏幕上的更新服务将运行。

我发现了一个解决我的问题与此code：

  PowerManager的电源管理;
电源管理=（电源管理）this.getSystemService（Context.POWER_SERVICE）;
如果（powermanager.isScreenOn（））
    {
        ...
    }
 

解决方案

您可以考虑另一种解决问题的方法：

使用广播接收器，当屏幕开启设置重复报警。然后，当屏幕关闭时，取消报警。

Is there any way to find out that the android device screen is on or not without broadcast receivers? I want to make minute interval updates on device via service that is invoked by alarm manager. I also want to preserve battery life. So the update service will run if the device screen is on.

i found a solution to my problem with this code:

PowerManager powermanager;
powermanager = (PowerManager) this.getSystemService(Context.POWER_SERVICE); 
if (powermanager.isScreenOn())
    {
        ...
    }

解决方案

You can consider another approach to the problem:

Using Broadcast Receivers, set your repeating alarm when the screen is turned on. Then, when the screen is turned off, cancel your alarm.

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