How to use data-binding with Fragment

Question

I\'m trying to follow data-binding example from official google doc https://developer.android.com/tools/data-binding/guide.html

except that I\'m trying to apply data

Answer 1

Even the other answers may work well, but I want tell best approach.

Use Binding class's inflate as recommended in Android Documentation.

One option is to inflate by DataBindingUtil but when only you don't know have generated binding class.

--You have auto generated binding class, use that class instead of using DataBindingUtil.

In Java

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    HomeFragmentBinding binding = HomeFragmentBinding.inflate(inflater, container, false);
    //set binding variables here
    return binding.getRoot();
}

In Kotlin

lateinit var binding: HomeFragmentBinding 
override fun onCreateView(inflater: LayoutInflater?, container: ViewGroup?, savedInstanceState: Bundle?): View? {
    binding = HomeFragmentBinding.inflate(inflater, container, false)
    return binding.root
}

In DataBindingUtil class documentation you can see.

inflate

T inflate (LayoutInflater inflater, 
                int layoutId, 
                ViewGroup parent, 
                boolean attachToParent)

Use this version only if layoutId is unknown in advance. Otherwise, use the generated Binding's inflate method to ensure type-safe inflation.

If your layout biniding class is not generated @See this answer.

Answer 2

A complete example in data binding Fragments

FragmentMyProgramsBinding is binding class generated for res/layout/fragment_my_programs

public class MyPrograms extends Fragment {
    FragmentMyProgramsBinding fragmentMyProgramsBinding;

    public MyPrograms() {
        // Required empty public constructor
    }


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

    @Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);

    }
}