Android: Create a background thread that runs periodically and does UI tasks?

Question

OK, so I know how to do a backround task, I know how to do a periodic task (using handle postdelayed and runnable), I also know how to do UI task from background thread (via

Answer 1

If activities are frequently switching, why not reversing the responsibilities. You might create a service which executes a periodic network task.

Then, - either your activities periodically call this service to get the value. - or you use a listener system : you create an interface that your activities must implement in order to get notified from the task completion