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在ContextWrapper类中有一个方法registerReceiver(BroadcastReceiver receiver, IntentFilter filter)
receiver = new ScreemRecevicer();
IntentFilter filter = new IntentFilter();
filter.addAction("android.intent.action.SCREEN_OFF");
filter.addAction("android.intent.action.SCREEN_ON");
registerReceiver(receiver, filter);
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原文地址:http://www.cnblogs.com/candledragle/p/4218620.html