android - Making changes to an ActionBar that is set via the theme? -

i trying make changes action bar when click on actionbar icon, brought home screen. tried approach:

actionbar.sethomebuttonenabled(true);  public override bool onoptionsitemselected(imenuitem item)     {         if (item.itemid == android.resource.id.home) {             intent home = new intent(this, typeof(welcomescreen));             home.setflags(activityflags.newtask | activityflags.cleartask);             startactivity(home);         } 

but surprise icon not clickable. have tried using

actionbar.setdisplayhomeasupenabled(true); 

and works, not want <- associated method.

i have taken on project else , have set action bar part of theme. unsure how can interact action bar on individual screens...

( want add implementation (back home screen on icon press) on screens if that's possibility great)