如何检查电源按钮点击BroadcastReceiver类

Question

我只想在用户点击电源按键时显示微调器，这里是我想要的代码，当用户按下powerkeybutton时，只有特定的广播接收器调用而不是任何broadcastreciver类

public class CloseSystemDialogsIntentReceiver extends BroadcastReceiver {
        public void onReceive(final Context context, final Intent intent) {
            ActivityMenu.spinner.performClick();
        }
    }
    // i want to add below this code on my reciver class
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (event.getKeyCode() == KeyEvent.KEYCODE_POWER) {
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }

或者如果我在我的主要活动中写下这段代码

public boolean onKeyDown(int keyCode, KeyEvent event) {
      if (event.getKeyCode() == KeyEvent.KEYCODE_POWER) {
        return true;
      }
      return super.onKeyDown(keyCode, event);
   }

如何限制我的代码只调用此 CloseSystemDialogsIntentReceiver 广播接收器类???