Android屏幕加解鎖事件廣播的監聽

想在程序中監聽屏幕SCREEN_ON和SCREEN_OFF這兩個action,實現屏幕鎖定狀態的監聽，從而實現自己的相應功能。比較奇怪的是這兩個action只能通過代碼的形式注冊才能被監聽到，在AndroidManifest.xml中注冊根本監聽不到。去網上查了一下，原來是PowerManager那邊在發這個廣播的時候做了限制，限制只有register到代碼中的receiver才能接收。特此記錄！

1. public class ScreenActionReceiver extends BroadcastReceiver {
3. private String TAG = "ScreenActionReceiver";
4. private boolean isRegisterReceiver = false;
6. @Override
7. public void onReceive(Context context, Intent intent) {
8. String action = intent.getAction();
9. if (action.equals(Intent.ACTION_SCREEN_ON)) {
10. Logcat.d(TAG, "屏幕解鎖廣播...");
11. } else if (action.equals(Intent.ACTION_SCREEN_OFF)) {
12. Logcat.d(TAG, "屏幕加鎖廣播...");
13. }
14. }
16. public void registerScreenActionReceiver(Context mContext) {
17. if (!isRegisterReceiver) {
18. isRegisterReceiver = true;
20. IntentFilter filter = new IntentFilter();
21. filter.addAction(Intent.ACTION_SCREEN_OFF);
22. filter.addAction(Intent.ACTION_SCREEN_ON);
23. Logcat.d(TAG, "注冊屏幕解鎖、加鎖廣播接收者...");
24. mContext.registerReceiver(ScreenActionReceiver.this, filter);
25. }
26. }
28. public void unRegisterScreenActionReceiver(Context mContext) {
29. if (isRegisterReceiver) {
30. isRegisterReceiver = false;
31. Logcat.d(TAG, "注銷屏幕解鎖、加鎖廣播接收者...");
32. mContext.unregisterReceiver(ScreenActionReceiver.this);
33. }
34. }
36. }