Android - how to invoke onNavigationItemSelected when spinner item is re-selected -

i using spinner in action bar navigation. problem is, onnavigationitemselected not called when selected item same selected one. have looked @ similar questions here , here , here none of them provide working solution, specific required drop down navigation within action bar.

i using following code:

public class testspinner extends activity implements actionbar.onnavigationlistener {    private integer mposition;         @override protected void oncreate(bundle savedinstancestate) {       super.oncreate(savedinstancestate);      final actionbar actionbar = getactionbar();       final string[] eventtypes = getresources().getstringarray(                 r.array.spinner_items);      mposition = -1;      arrayadapter<string> adapter = new arrayadapter<string>(                             actionbar.getthemedcontext(),               android.r.layout.simple_spinner_item, android.r.id.text1,                            eventtypes);      adapter.setdropdownviewresource(android.r.layout.simple_spinner_dropdown_item);     actionbar.setlistnavigationcallbacks(adapter, this);     actionbar.setdisplayhomeasupenabled(true);        actionbar.setnavigationmode(actionbar.navigation_mode_list); 

....

@override public boolean onnavigationitemselected(int position, long id) {      if (mposition > -1) {                        mposition = position;             // execute required code on spinner item selection            return true;      } else {         mposition = 0;         return false;        } }        

note, use mposition flag prevent onnavigationitemselected execute code when action bar first created. wonder if there more elegant, recommended way of doing ?

however, key question is, how generate callback onnavigationitemselected when same spinner item in action bar re-selected ?