Fragment crash while switching between them quickly inside BottomNavigation

Question

I have my MainActivity inside which I have BottomNavigation which loads fragment with the following method

private boolean loadFragment(Fragment fragment) {
        //switching fragment
        if (fragment != null) {
            getSupportFragmentManager()
                    .beginTransaction()
                    .replace(R.id.fragment_container, fragment)
                    .commit();
            return true;
        }
        return false;
    }

When I switch between them quickly my app crashes at various places, but when I go slowly one by one everything works fine

This is how my app structure looks like

I am using Reteofit for API call

I already tried setuserVisibleHint also check if my view rootView is created or not

I can share logcat but the errors are not consistent they on fragment annd mostly are NPE — yuj, Aug 22 '18 at 05:48
Seeing crash in logcat is essential part in finding the bug. And helping you. — Deividas Strioga, Aug 22 '18 at 05:51

score 0 · Answer 1 · answered May 07 '20 at 21:13

I was using retrofit to get a response of API then pass it to an adapter but due to fast switch using bottom navigation and fragments then my app crashing because the hideProgressBar() throw NullException. I observed that view is destroyed then widgets don't perform.

So I put check to make sure that view is not null. It fixes my situation. I hope it helps other people who are looking for the same solution.

In Kotlin: view and Java: getView() (In Java)

Fragment crash while switching between them quickly inside BottomNavigation

1 Answers1