How to get the currently displaying fragment in Nav Controller

Issue

I use a singe activity and embed multiple fragments into it. Now I would like to know within the single activity class, which Fragment is currently being displayed. How can I do this? I had a look at the solution from here How to know if a Fragment is Visible?

MyFragmentClass test = (MyFragmentClass) getSupportFragmentManager().findFragmentByTag("testID");
if (test != null && test.isVisible()) {
     //DO STUFF
}
else {
    //Whatever
}

But I don't know what to you for the parameter "testID". Further, I tried to implement the solution from Get the current fragment object

Fragment currentFragment = getActivity().getFragmentManager().findFragmentById(R.id.fragment_container);

But here I get the error message: "Cannot resolve symbol 'fragment_container'"

Does anyone have an idea how to get the name of the current Fragment that is being displayed when using a single activity and multiple fragments approach?

Solution

I know there are already 2 answers on mine here but still have 1 more solution so I am writing it here. This is the code:

NavController navController = Navigation.findNavController(this, R.id.fragment);
        int id=navController.getCurrentDestination().getId();
      if(id==R.id.startGameFragment ){ // change the fragment id
          selectedPosition(0);

      }else if(id==R.id.gameFragment ){ // change the fragment id
          selectedPosition(1);

      }else if(id==R.id.endGameFragment ){ // change the fragment id
          selectedPosition(2);

      }

Answered By - Sambhav. K