android - How to bind tabs from menu.xml with code? -

i'm new in android. stumbled on connecting tabs menu code.

here menu.xml file:

<?xml version="1.0" encoding="utf-8"?>  <menu xmlns:android="http://schemas.android.com/apk/res/android">             <item                 android:id="@+id/multitouchexample"                 android:title="multitouch"                 android:icon="@drawable/ic_multitouch_grey"                 android:showasaction="ifroom">             </item> </menu> 

and here myactivity.java:

//includes  public class myactivity extends activity {  final string log_tag = "taglogs"; actionbar actionbar;  @override public void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);              actionbar = this.getactionbar();      actionbar.setnavigationmode(actionbar.navigation_mode_tabs);      log.d(log_tag, "oncreate start");     log.d(log_tag, new integer(actionbar.gettabcount()).tostring()); } } 

and have in logcat:

>     d/taglogs﹕ oncreate start >     d/taglogs﹕ 0 

so says me, have 0 tabs, have 1 in menu.xml , see when run program. it? need do?

this screenshot of working:

update: when want link button res/layout/main.xml code:

button = (button) findviewbyid(r.id.button); 

so don't create button operator new in code. there way solve problem button?

so, found solution on stackoverflow in context.

here answer:

android - how dynamically change menu item text outside of onoptionsitemsselected or oncreateoptionsmenu

first, should save reference menu:

publid boolean oncreateoptionsmenu(menuitem menu){     getmenuinflater().inflate(r.menu.menu, menu);     this.menu = menu;// this.menu field menu menu in myactivity class     return true; } 

via reference have full access menuitems.

for example:

menuitem item = menu.finditem(r.id.multitouchexample);     item.setonmenuitemclicklistener(new menuitem.onmenuitemclicklistener() {         @override         public boolean onmenuitemclick(menuitem item) {             item.seticon(r.drawable.ic_multitouch_red);             multitouchexample();             return true;         }     });