Warning: this may be a pre-Lollipop answer.

A Fragment doesn't get re-inflated on configuration change, but you can achieve the effect as follows by creating it with a FrameLayout and (re)populating that manually:

public class MyFragment extends Fragment {    @Override    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle bundle) {        FrameLayout frameLayout = new FrameLayout(getActivity());        populateViewForOrientation(inflater, frameLayout);        return frameLayout;    }    @Override    public void onConfigurationChanged(Configuration newConfig) {        super.onConfigurationChanged(newConfig);        LayoutInflater inflater = LayoutInflater.from(getActivity());        populateViewForOrientation(inflater, (ViewGroup) getView());    }    private void populateViewForOrientation(LayoutInflater inflater, ViewGroup viewGroup) {        viewGroup.removeAllViewsInLayout();        View subview = inflater.inflate(R.layout.my_fragment, viewGroup);        // Find your buttons in subview, set up onclicks, set up callbacks to your parent fragment or activity here.    }}

I'm not particularly happy with the getActivity() and related calls here, but I don't think there's another way to get hold of those things.