CallingFragment.java

public class CallingFragment extends Fragment {
    private UPIViewModel upiViewModel;
  
    @Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        upiViewModel = new ViewModelProvider(requireActivity()).get(UPIViewModel.class);
        setObservers();
    }
  
    private void setObservers() {
        upiViewModel.canSaveData.observer(getViewLifecycleOwner(), canSaveData -> {
            if (canSaveData) {
                String upiID = upiViewModel.upiID.getValue();
            }
        });
    }
}