@Override public void onActivityCreated(@Nullable Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); // adapter = new // ViewPagerAdapterSubLeague(getActivity().getSupportFragmentManager(),Titles,NumbOfTabs); adapter = new ViewPagerAdapterSubLeague(getChildFragmentManager(), Titles, NumbOfTabs); pager.setAdapter(adapter); tab.setViewPager(pager); }