Android Question Show application that is in the background

[vecino]

Hi, I have been asked for an application that verifies some data on a website and if it meets some requirements then the application displays a form to the user.
That's easy of course, the problem is that it is required to start the application and leave it running in the background when the back button is pressed.

And every hour (for example) to check the web, even if it is in the background, and if appropriate then to show the user the form.
I also think there is a problem if another application is running at that time, as it would have to be displayed "on top" of the other.
If possible, what should I look for in the forums?
Thanks.

 

[Erel]

Relevant threads:
1. Running in the background: https://www.b4x.com/android/forum/threads/99873/#content
2. Start activity from background app: https://www.b4x.com/android/forum/threads/draw-on-top-of-other-apps-permission.90513/

The "mainstream" way to implement such solution is with push notifications.