Activity裏接收不到廣播是怎麼回事

1.Activity註冊動態廣播和銷燬廣播

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    registerExitAppReceiver();
}
public void registerExitAppReceiver() {
    IntentFilter exitFilter = new IntentFilter();
    exitFilter.addAction(ProtocalConstants.MESSAGE_EXIT_APP);
    registerReceiver(exitReceiver, exitFilter);
}
private ExitAppReciver exitReceiver= new ExitAppReciver();

@Override
protected void onDestroy() {
    super.onDestroy();
    unregisterReceiver(exitReceiver);

}


2.廣播接收器

public class ExitAppReciver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO Auto-generated method stub
        if (context != null) {
            if (context instanceof Activity) {
                ((Activity) context).finish();
            } else if (context instanceof FragmentActivity) {
                ((FragmentActivity) context).finish();
            } else if (context instanceof Service) {
                ((Service) context).stopSelf();
            }
        }
    }
}

3.發送廣播

LocalBroadcastManager.getInstance(context).sendBroadcast(intentBroad)

這樣發送是接受接收器收不到廣播的。這種發送廣播的方式接收是

LocalBroadcastManager.getInstance(context).registerReceiver(exitReceiver, exitFilter);

需要這樣發送sendBroadcast(intentBroad);反之LocalBroadcastManager.getInstance(context).registerReceiver(exitReceiver, exitFilter);註冊的廣播 
這樣發送sendBroadcast(intentBroad)也是收不到的



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