Add similar code to your fragments:
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup parent, Bundle savedInstanceState)
{
View v = inflater.inflate(R.layout.library_fragment, parent, false);
setHasOptionsMenu(true);
return v;
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.your_menu_xml, menu);
super.onCreateOptionsMenu(menu, inflater);
}
This way you can customize the menu for your fragments.