Running code in main thread from another thread

Question

In an android service I have created thread(s) for doing some background task.

I have a situation where a thread needs to post certain task on main thread\'s message

Answer 1

One method I can think of is this:

1) Let the UI bind to the service.
2) Expose a method like the one below by the Binder that registers your Handler:

public void registerHandler(Handler handler) {
    mHandler = handler;
}

3) In the UI thread, call the above method after binding to the service:

mBinder.registerHandler(new Handler());

4) Use the handler in the Service's thread to post your task:

mHandler.post(runnable);