如何在Android中注册睡眠事件？

我正在开发 Android 3.0，我需要在我的应用程序中知道设备何时进入睡眠/关闭屏幕。

我如何注册此意图/事件，以便在发生这种情况时我能够运行一些操作？ BroadcastReceiver 中是否有任何通知此操作的操作？

This http://thinkandroid.wordpress.com/2010/01/24/handling-screen-off-and-screen-on-intents/页面上有一个关于您正在寻找的内容的教程。

从该页面复制的代码（为了将其从仅链接的答案转变为直接有用的答案）：

1) 在您的应用程序中创建一个类来接收意图。例如，以下接收器独立并设置要在第 2 部分中使用的静态变量：

public class ScreenReceiver extends BroadcastReceiver {
    public static boolean wasScreenOn = true;

    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) {
            // do whatever you need to do here
            wasScreenOn = false;
        } else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) {
            // and do whatever you need to do here
            wasScreenOn = true;
        }
    }
}

2) 修改您的 Activity 以接收屏幕开/关事件。您的接收器将检查广播接收器中的静态变量，以了解您刚刚收到的意图的原因：

public class ExampleActivity extends Activity {
   @Override
    protected void onCreate() {
        // initialize receiver
        IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON);
        filter.addAction(Intent.ACTION_SCREEN_OFF);
        BroadcastReceiver mReceiver = new ScreenReceiver();
        registerReceiver(mReceiver, filter);
        // your code
    }

    @Override
    protected void onPause() {
        // when the screen is about to turn off
        if (ScreenReceiver.wasScreenOn) {
            // this is the case when onPause() is called by the system due to a screen state change
            System.out.println("SCREEN TURNED OFF");
        } else {
            // this is when onPause() is called when the screen state has not changed
        }
        super.onPause();
    }

    @Override
    protected void onResume() {
        // only when screen turns on
        if (!ScreenReceiver.wasScreenOn) {
            // this is when onResume() is called due to a screen state change
            System.out.println("SCREEN TURNED ON");
        } else {
            // this is when onResume() is called when the screen state has not changed
        }
        super.onResume();
    }
}