Loop through all subviews of an Android view?

I have made a small example of a recursive function:

public void recursiveLoopChildren(ViewGroup parent) {
        for (int i = 0; i < parent.getChildCount(); i++) {
            final View child = parent.getChildAt(i);
            if (child instanceof ViewGroup) {
                recursiveLoopChildren((ViewGroup) child);
                // DO SOMETHING WITH VIEWGROUP, AFTER CHILDREN HAS BEEN LOOPED
            } else {
                if (child != null) {
                    // DO SOMETHING WITH VIEW
                }
            }
        }
    }

The function will start looping over al view elements inside a ViewGroup (from first to last item), if a child is a ViewGroup then restart the function with that child to retrieve all nested views inside that child.