Fragment already added IllegalStateException

Question

I use this method on my container Activity to show a BFrag

public void showBFrag()
{
    // Start a new FragmentTransaction
    FragmentTransaction fragmentT         


        

Answer 1

This code is working fine for me. try this

((MiActivity)getActivity()).addAccount = new AddAccount();
((MiActivity)getActivity()).addAccount.setArguments(params);
fragmentManager = getActivity().getSupportFragmentManager();
fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.fragment_container((MiActivity)getActivity()).addAccount);
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();

Answer 2

In the end my workaround was to execute remove() of the previous fragment and add() the new one. Although that's what replace() method was meant to do.

But I am still guessing why replace() method didn't work properly in this case. It is really weird and I want to discard that it is because I am misunderstanding something or doing something wrong.

Answer 3

Removing setOffscreenPageLimit from Viewpager solved my issue. Thanks.

Answer 4

I used this:

if (getFragmentManager().findFragmentByTag(newFragment.getClass().getName()) != null) {
   transaction.remove(newFragment);
 }

and added fragment with

MyFragment frag = new MyFragment(); 
transaction.add(R.id.container, frag, MyFragment.class.getName())

MyFragment.class.getName() stands for tag

Answer 5

I tried calling FragmentTransaction.remove() from onTabUnselected() and it worked around this bug.

@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
    ft.add(R.id.fragment_container, fragment, null);
}

@Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
    ft.remove(fragment);
}

Answer 6

Solved it by looping through my fragments and checking if isAdded() is true, then removing that fragment. More details here.