Fragment is not attched to parent when application goes to background for long time

Question

I have a fragmentA which has ViewPager which contains couple fragments lets say FragmentA-1 and FragmentA-2. If i keep app in background for more than 10 minutes and open app again, Fragment inside(ie FragmentA-1, FragmentA-2) viewpager get detached.

But click events of the view inside FragmentA-1 and FragmentA-2 works fine and when I try to update UI from parent fragment ie FragmentA then it shows view as null;

 mFrontPhotoFragment = AddCardPhotosFragment.newInstance();
    mBackPhotoFragment = AddCardPhotosFragment.newInstance();
    mCardsFragment.add(mFrontPhotoFragment);
    mCardsFragment.add(mBackPhotoFragment);
    PagerAdapter pagerAdapter = new PagerAdapter(getChildFragmentManager(), mCardsFragment);
    mCardsViewPager.setAdapter(pagerAdapter);

This happens on specific devices with low configuration. How can i fix this

Thanks in advance.

Answer 1

In view pager, Fragment might be recycled it some times. Try setting page limit.

You can call viewpager.setOffscreenPageLimit(k) to cache all entities of ViewPager from nk to n+k .