Fragment Navigation Component Graph in Android.

Steps:-
Dependencies:-

implementation 'android.arch.navigation:navigation-fragment:1.0.0'

1. Create a new Project.
2. Create a directory name "navigation" inside res folder like below

3. Right click on navigation directory and add  Navigation Resource File like below :-

4.Click on MainActivity's XML file and do following :-
activity_main:-
here we have to take one fragment which will hold the fragment. And this will be also my hostFragment , 3 important thing don't forget to add:-

android:name="androidx.navigation.fragment.NavHostFragment"

app:navGraph="@navigation/login_nav_graph"

app:defaultNavHost="true"

5.Click on navigation folder and click on login_nav_graph.xml and go to design and click on + button and click  "create new designation" and create LoginFragment like below :-

6. be continue to add all classes like that and than the graph will like below:-

7. 

Main Import is:-

import static androidx.navigation.Navigation.findNavController;

code that on click of various button how to write code for navigation:-

public class LoginFragment extends Fragment {
    Button btnMobile, btnFacebook;

    @Override    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment        return inflater.inflate(R.layout.fragment_login, container, false);
    }

    @Override    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        btnMobile = view.findViewById(R.id.btnMobile);
        btnFacebook = view.findViewById(R.id.btnFacebook);

        btnMobile.setOnClickListener(new View.OnClickListener() {
            @Override            public void onClick(View v) {
                findNavController(getActivity(), R.id.btnMobile).navigate(R.id.mobileFragment, null);
            }
        });
        btnFacebook.setOnClickListener(new View.OnClickListener() {
            @Override            public void onClick(View v) {
                findNavController(getActivity(), R.id.btnFacebook).navigate(R.id.facebookFragment, null);
            }
        });
    }
}