how to wait until a fragment is removed

Question

I have an activity with dynamic fragments in it. I need to run some code after a fragment is removed but remove(myFragment).commit() is executed asynchronously and i cant know when exactly the fragment is removed.Here is my code:

final FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.remove(myFragment).commit();
//wait until the fragment is removed and then execute rest of my code

From the documentation:

public abstract int commit ()

Schedules a commit of this transaction. The commit does not happen immediately; it will be scheduled as work on the main thread to be done the next time that thread is ready.

Answer 1

What if you use the fragment's onDetach method to call the activity and tell it its done?

class MyFrag extends Fragment {

    private Activity act;

    @Override
    public void onAttach(Activity activity) {
        act = activity;
    }

    @Override
    public void onDetatch() {
        act.fragGone();
    }
}

And in the activity:

public void fragGone() {
    //do something, update a boolean, refresh view, etc.
}