Android屏幕加解锁事件广播的监听

Android屏幕加解锁事件广播的监听

想在程序中监听屏幕SCREEN_ON和SCREEN_OFF这两个action,实现屏幕锁定状态的监听，从而实现自己的相应功能。比较奇怪的是这两个action只能通过代码的形式注册才能被监听到，在AndroidManifest.xml中注册根本监听不到。去网上查了一下，原来是PowerManager那边在发这个广播的时候做了限制，限制只有register到代码中的receiver才能接收。特此记录！

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, "屏幕解锁广播...");
11. } else if (action.equals(Intent.ACTION_SCREEN_OFF)) {
12. Logcat.d(TAG, "屏幕加锁广播...");
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, "注册屏幕解锁、加锁广播接收者...");
24. mContext.registerReceiver(ScreenActionReceiver.this, filter);
25. }
26. }
28. public void unRegisterScreenActionReceiver(Context mContext) {
29. if (isRegisterReceiver) {
30. isRegisterReceiver = false;
31. Logcat.d(TAG, "注销屏幕解锁、加锁广播接收者...");
32. mContext.unregisterReceiver(ScreenActionReceiver.this);
33. }
34. }
36. }