@Override
 public boolean onOptionsItemSelected(MenuItem item) {
   final int itemId = item.getItemId();
   if (itemId == MENU_ADD_SUBTYPE) {
     final SubtypePreference newSubtype =
         SubtypePreference.newIncompleteSubtypePreference(getActivity(), mSubtypeProxy);
     getPreferenceScreen().addPreference(newSubtype);
     newSubtype.show();
     mIsAddingNewSubtype = true;
     return true;
   }
   return super.onOptionsItemSelected(item);
 }