Is there a method that works like start fragment for result?

Question

I currently have a fragment in an overlay. This is for signing in to the service. In the phone app, each of the steps I want to show in the overlay are their own screens and

Answer 1

My 2 cents.

I switch beween fragments by swapping an old fragment with a new one using hide and show/add (existing/new). So this answer is for devs who use fragments like I do.

Then I use the onHiddenChanged method to know that the old fragment got switched to back from the new one. See code below.

Before leaving the new fragment, I set a result in a global parameter to be queried by the old fragment. This is a very naive solution.

@Override
public void onHiddenChanged(boolean hidden) {
    super.onHiddenChanged(hidden);
    if (hidden) return;
    Result result = Result.getAndReset();
    if (result == Result.Refresh) {
        refresh();
    }
}

public enum Result {
    Refresh;

    private static Result RESULT;

    public static void set(Result result) {
        if (RESULT == Refresh) {
            // Refresh already requested - no point in setting anything else;
            return;
        }
        RESULT = result;
    }

    public static Result getAndReset() {
        Result result = RESULT;
        RESULT = null;
        return result;
    }
}