android - 创建一个每次打开屏幕时都会运行的应用程序

Question

我正在使用android studio，我想知道是否有办法制作一个每次打开屏幕时都运行的应用程序（例如屏幕锁定）。我知道以前有人问过这个问题，但我不明白该把代码放在哪里..请帮忙

Answer 1

<!-- SCREEN_ON BroadCast intent-filter -->  
< receiver android: name = ".broadcast.LockScreenReceiver" >
  < intent - filter >
  < action android: name = "android.intent.action.SCREEN_ON" / >
  < action android: name = "android.intent.action.SCREEN_OFF" / >
  < action android: name = "android.intent.action.USER_PRESENT" / >
  < /intent-filter>  
</receiver >


  //receive broadcast and do something
  public void onReceive(Context context, Intent intent) {
    if (Intent.ACTION_USER_PRESENT.equals(intent.getAction())) {
      Log.e("scrennOn", "I'm comming!");
    }
  }