Execute code on main thread in Android without access to an Activity?

Question

I have an Android service that starts and maintains a background thread.

From time to time, the background thread needs to do a callback on the main thread. I\'m stu

Answer 1

Your activity has to can bind to the service.

http://developer.android.com/guide/components/bound-services.html

Specifically, take a look at creating a Messenger on that page. The client activity can give a messenger object that responds to messages from the service, and once received, run whatever UI code is necessary on the UI thread using a handler.

DO NOT keep the activity's reference in the service. This can lead to all sorts of memory issues.