如何知道用户是否在Android活动之外连续两次按了电源键? [英] How to know if the user has pressed power key twice or thrice continuously outside the activity in android?

问题描述

我需要知道用户何时连续按下电源键2或3次. 但是，如果用户不在应用程序中，可以在主屏幕上说，甚至使用任何其他应用程序.

I need to know when the user will press the power key continuously 2 or 3 times. But in the case the user is out of the application lets say on the home screen or even using any other application.

我在活动上获得了电源键的侦听器事件，但在服务上却没有.

I getting the listener event of the power key on the activity but not on the service.

   @Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if(KeyEvent.KEYCODE_POWER == event.getKeyCode()){

        Log.e("POWER", "pow");
          return true;//If event is handled, falseif 

    }
    return super.onKeyDown(keyCode, event);
}

我怎么知道用户是否在活动之外按下了电源按钮?

How can i know if the user has pressed the power button outside the activity?

推荐答案

您不能覆盖应用程序中的电源按钮.但是，当您按下电源按钮时，屏幕会打开/关闭.因此您可以使用广播接收器检测到这一点

You cannot override the power button press from your application. But when you press power button the screen turns on/off. So you can detect this using a broadcast receiver

<receiver android:name=".MyBroadCastReciever">
    <intent-filter>
        <action android:name="android.intent.action.SCREEN_OFF"/>
        <action android:name="android.intent.action.SCREEN_ON"/>
    </intent-filter>
</receiver>

和广播接收器类

public class MyBroadCastReciever extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) {
            //Take count of the screen off position
        } else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) {
            //Take count of the screen on position
        }
    }
}

希望这对您有所帮助.

这篇关于如何知道用户是否在Android活动之外连续两次按了电源键?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！