Android - how to auto switch tab in tabhost -


i have tabhost 3 tabs. in tab 3 have activity: testactivity. in activity, have button. when click button in tab 3, want tabhost switch in tab 1. should switch automatically; i'm don't click tab 1. how can this?

public class tabhostactivity extends activity{ public tabhost tabhost; private resources res; intent intent; tabhost.tabspec spec; private localactivitymanager mlocalactivitymanager; protected int currenttab;  @override protected void oncreate(bundle savedinstancestate)  {     // todo auto-generated method stub     super.oncreate(savedinstancestate);     setcontentview(r.layout.tabhost);     tabhost = (tabhost) findviewbyid(r.id.tabhost);     mlocalactivitymanager = new localactivitymanager(this, false);     mlocalactivitymanager.dispatchcreate(savedinstancestate);     tabhost.setup(mlocalactivitymanager);     res = getresources();     intent = new intent().setclass(this, spinneractivity.class);     spec = tabhost.newtabspec("artists");      spec.setindicator("sinner", null);     spec.setcontent(intent);     tabhost.addtab(spec);      intent = new intent().setclass(this, sonandroidactivity.class);     spec = tabhost.newtabspec("main");     spec.setindicator("main",res.getdrawable(r.drawable.ios_logo));     spec.setcontent(intent);     tabhost.addtab(spec);       intent = new intent().setclass(this, testactiviy.class);     spec = tabhost.newtabspec("spinner");     spec.setindicator("test", null);     spec.setcontent(intent);     tabhost.addtab(spec); }      tabhost.setontabchangedlistener(new ontabchangelistener() {          @override         public void ontabchanged(string tabid) {             log.v("tag", "click:" + tabhost.getcurrenttab());             currenttab = tabhost.getcurrenttab();                    }

and event activity tab 3:

public class testactiviy extends tabhostactivity{     @override     protected void oncreate(bundle savedinstancestate) {       // todo auto-generated method stub         super.oncreate(savedinstancestate);         setcontentview(r.layout.test);     }      public void btn_onclick(view v)     {            tabhost.setcurrenttab(0);         log.v("tag", "clickkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk");         } } 

public void btn_onclick(view v) {     localactivitymanager l = new localactivitymanager ();     l.tabhost.setcurrenttab(0); }

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