Check if fragment is currently visible or no

Question

I know there are lots of similar questions in StackOverflow but my question is little different.

I have nested hierarchy of Fragments like in below structure:

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Answer 1

When I had a similar problem I solved it by using this hacky method 'going under the hood' like

Inside your FragmentPagerAdapter(s) add this function.

public Fragment getActiveFragment(ViewPager container, int position) {
        String name = makeFragmentName(container.getId(), position);
        return fm.findFragmentByTag(name);
    }

    private static String makeFragmentName(int viewId, int index) {
        return "android:switcher:" + viewId + ":" + index;
    }

It is not the most graceful solution but as long as it works

CAUTION

This is a private method internal to ViewPager that could change at any time or for any OS version.