How to solve for viewpager : The specified child already has a parent. You must call removeView() on the child's parent first

Question

Into my project I am using viewpager with three tabs named History,Main,Map.Main activity contain Timer,stopwatch,etc

Answer 1

For a adapter if you are using with tabLayout or viewPager, instead of getChildFragmentManager() replace it with getActivity().getSupportFragmentManager() like below.

TabAdapter adapter = new TabAdapter(getActivity(), getActivity().getSupportFragmentManager());