Android menu item list navigation -

i need please me switch , case...

i have 3 item in action bar item1, item2, item3 , have 3 activity item1activity.java, item2activity, item2activity.. want call activity menu when item selected..

public class mainactivity extends activity {   /** array of strings populate dropdown list */ string[] actions = new string[] {     "item1",     "item2",     "item3" }; protected int position;  /** called when activity first created. */ @override public void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.main);       /** create array adapter populate dropdownlist */     arrayadapter<string> adapter = new arrayadapter<string>(getbasecontext(), android.r.layout.simple_spinner_dropdown_item, actions);       /** enabling dropdown list navigation action bar */     getactionbar().setnavigationmode(actionbar.navigation_mode_list);      /** defining navigation listener */     actionbar.onnavigationlistener navigationlistener = new onnavigationlistener() {          @override         public boolean onnavigationitemselected(int itemposition, long itemid) {              switch (itemposition) {             case 1:                 intent = new intent();                 i.setclass(getapplicationcontext(), item1activity.class);                 startactivity(i);                 return true;              case 2:                 intent = new intent();                 i.setclass(getapplicationcontext(), item2activity.class);                 startactivity(i);                 return true;                 }                  }         };      /** setting dropdown items , item navigation listener actionbar */     getactionbar().setlistnavigationcallbacks(adapter, navigationlistener);    } 

}

use mainactivity.this instead of getapplicationcontext()

activity child of context