How to disable back button pressed in android fragment class

Issue

I want to disable the back button in a fragment class. onBackPressed() doesn't seem to work in this fragment. How could I disable the back button?

This is my sample code:

public class Login extends Fragment {
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
       ,Bundle savedInstanceState) {
        ViewGroup root = (ViewGroup) inflater.inflate(R.layout.login, null);
        return root;
    }

    public void onBackPressed() {
    }
}

Solution

Updated Answer

You need to use the new OnBackPressedDispatcher to handle on back callbacks. Then, you can show Are you sure dialog to confirm the action.

OnBackPressedCallback callback = new OnBackPressedCallback(true) {
            @Override
            public void handleOnBackPressed() {
                // create a dialog to ask yes no questions whether or not the user wants to exit
            }
        };
    requireActivity().getOnBackPressedDispatcher().addCallback(this, callback);

Old Answer

The below method is deprecated.

You have to override onBackPressed of the parent FragmentActivity class. Therefore, put your codes in the parent FragmentActivity. Or you can call the parent's method by using this:

public void callParentMethod(){
    getActivity().onBackPressed();
}

in FragmentActivity override onBackPressed Method and not call its superclass to disable the back button.

@Override
public void onBackPressed() {
  // super.onBackPressed();
  // create a dialog to ask yes no question whether or not the user wants to exit
  ...
}

Answered By - Gunhan