Know if Activity is open (Broadcastreceiver or service)

Question

I would like to implement a function that can check if Activity is open, because when I receive the notification through GCM (Google Cloud Messaging) if Activity has opened will only upload the information in it, if you have closed notify the user and through this notification he opens the Activity with the information. I want to do this within a service, vlw!

Answer 1

You can use a static variable within the Activity, so you can define it by exploring the life cycle onStart() and onStop(). Behold:

class MinhaActivity extends Activity {
     static boolean active = false;

      @Override
      public void onStart() {
         super.onStart();
         active = true;
      } 

      @Override
      public void onStop() {
         super.onStop();
         active = false;
      }
}

To access and check if the variable is active or inactive, you can do so:

if(MinhaActivity.active){
    //esta ativa
} else {
    //não está ativa
}