[Solved] How to fix fragments backstack issues in android

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Create a singleton named NavigationHandler and add the below functions to it:

Function to open MainFragment:

public void openMainFragment(FragmentManager fragmentManager, MainFragment fragment){
        String backStackName = fragment.getClass().getSimpleName();
        fragmentManager.beginTransaction()
                .replace(R.id.fl_main_container, fragment)
                .addToBackStack(backStackName)
                .commit();
    }

Function to open SubFragment:

public void openSubFragment(FragmentManager fragmentManager, SubFragment fragment){
        String backStackName = fragment.getClass().getSimpleName();
        fragmentManager.popBackStackImmediate(backStackName, POP_BACK_STACK_INCLUSIVE);
        fragmentManager.beginTransaction()
                .replace(R.id.fl_main_container, fragment)
                .addToBackStack(backStackName)
                .commit();
    }

For backpress:

public void navigateBackBy(AppCompatActivity activity, int numOfFragments){
        if(mFragmentManager.getBackStackEntryCount()==1){
            activity.finish();
        }
        else {
            int i;
            for (i = 0; i < numOfFragments; i++) {
                mFragmentManager.popBackStackImmediate();
            }
        }
    }

In your Activity:

  1. Call openMainFragment(…) to open the MainFragment with the list.

  2. While calling your adapter constructor pass FragmentManager as a parameter.

  3. Override onBackPressed() & add call navigateBackBy(this, 1);. This method is useful to go back by any no. of fragments.

Inside your adapter:

  1. On click of an item call openSubFragment(…).

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solved How to fix fragments backstack issues in android