generic android DataBinding Fragment super class

BindingFragment.java

public class BindingFragment<BindingT extends ViewDataBinding> extends Fragment {
    private BindingT mBinding = null;
    private boolean mSuperCalled = false;

    protected BindingT getBinding() {
        return mBinding;
    }

    @Nullable
    @Override
    public final View onCreateView(final LayoutInflater inflater, @Nullable final ViewGroup container, @Nullable final Bundle savedInstanceState) {
        try {
            @SuppressWarnings("unchecked") final Method inflateMethod = ((Class<BindingT>) ((ParameterizedType) getClass().getGenericSuperclass()).getActualTypeArguments()[0])
                    .getMethod("inflate", LayoutInflater.class, ViewGroup.class, boolean.class);
            //noinspection unchecked
            mBinding = (BindingT) inflateMethod.invoke(null, inflater, container, false);
            mSuperCalled = false;
            onBindingInflated(mBinding);
            if (!mSuperCalled)
                throw new IllegalStateException("onBindingInflated() didn't call super");
            return mBinding.getRoot();
        } catch (IllegalAccessException | NoSuchMethodException | InvocationTargetException ex) {
            FirebaseCrash.log("Something really bad happened!");
            FirebaseCrash.report(ex);
        }
        return null;
    }

    @CallSuper
    protected void onBindingInflated(BindingT binding) {
        mSuperCalled = true;
    }

    @Override
    public void onDestroyView() {
        mBinding = null;
        super.onDestroyView();
    }
}

proguard-rules.pro

# BindingFragment
-keep class ** extends android.databinding.ViewDataBinding {
     public static ** inflate( android.view.LayoutInflater, android.view.ViewGroup, boolean);
}

SomeFragment.java

public OtherFragment extends BindingFragment<FragmentSomeBinding> {
    private SomeClass mSomeVar = new SomeClass();
    
    @Override
    protected void onBindingInflated(final FragmentSomeBinding binding) {
        super.onBindingInflated(binding);
        binding.setFragment(this);
        binding.setSomeVar(mSomeVar);
    }
    
    public void onSomethignClicked(View view) {
        getBinding().something.setVisibility(View.VISIBLE);
    }
}

What if we want to extend OtherFragment with a new binding class?

just do so and call super.onBindingInflated() in your derived class.