Android View Binding: base class to reduce boilerplate in Java

BaseViewBindingFragment.java

public abstract class BaseViewBindingFragment extends Fragment {

    private Field bindingField;
    private Method inflate;

    {
        try {
            for (Field declaredField : this.getClass().getDeclaredFields()) {
                if (ViewBinding.class.isAssignableFrom(declaredField.getType())) {
                    bindingField = declaredField;
                    bindingField.setAccessible(true);
                    for (Method method : bindingField.getType().getMethods()) {
                        if (method.getParameterTypes().length == 3) {
                            inflate = method;
                            break;
                        }
                    }
                    break;
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container,
                             @Nullable Bundle savedInstanceState) {
        try {
            ViewBinding binding = (ViewBinding) inflate.invoke(null, inflater, container, false);
            bindingField.set(this, binding);
            return binding.getRoot();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return super.onCreateView(inflater, container, savedInstanceState);
    }

    @Override
    public void onDestroyView() {
        try {
            bindingField.set(this, null);
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }
        super.onDestroyView();
    }

}

ExampleFragment.java

public class ExampleFragment extends BaseViewBindingFragment {

    // Just one declaration and it's done
    private FragmentExampleBinding binding;
    
    @Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        binding.textView.setText("...");
    }

}

@Jintin inflate is not a library method, it is generated code. It's the same as if you add a class with inflate method in it, so ProGuard will minify it by default. And yes, I agree that passing inflate method as reference has its benefits. As for solutions in Kotlin, I think the most optimal I saw is by @Zhuinden https://github.com/Zhuinden/ViewBindingExample/tree/master/app/src/main/java/com/zhuinden/viewbindingexample

@killvetrov
Thanks for explain and sharing.

@killvetrov
Thanks for your sharing

check my solution in Kotlin based on yours https://stackoverflow.com/a/71704997/5503940