, , . , AlarmManager.
, ACTION_SCREEN_ON , , , .
If you can work with Android 2.1 and later, PowerManagernow has a method isScreenOn(). The good news is what is available. The bad news is that since it has been added, it is unlikely that there is another way to easily identify it. And, a quick check of the source code does not give much hope that you can hack your way to information in previous SDKs.
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