[Solved] java.lang.IllegalStateException: Fragment not attached to a context

Updated: 11th October 2023
Tags: android java

If you use android ViewPager or SectionsPagerAdapter or simply fragment in activity, you attach fragment like this

Fragment fragment = (Fragment) new MyFragment();
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction()
        .replace(R.id.frame, fragment)
        .commit();

But after rotation, you got error java.lang.IllegalStateException: Fragment not attached to a context

I’ve searched 1 hour, tried to use requireContext(), which do nothing and found solution. But not on the internet, but in my old code from 2018 ;)

In activity that hosts fragment do this:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.my_activity);
    
    //your code

    //start of solution
    if (savedInstanceState != null) {
        return;
    }
    //end of solution

    Fragment fragment = (Fragment) new MyFragment();
    FragmentManager fragmentManager = getSupportFragmentManager();
    fragmentManager.beginTransaction()
            .replace(R.id.frame, fragment)
            .commit();
}

Thanks for coming and happy coding!