android - Reload current Activity clicking on active Tab -

i have tab layout , activities displayed in framelayout. how can reload current activity tab "home" clicking again on "home"-tab ?

tabtestactivity-class

public class tabtestactivity extends tabactivity implements onclicklistener{      tabhost tabhost;      /** called when activity first created. */     @override     public void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.main);           //menÜ////////////////////////////////////////////              /** tabhost have tabs */             tabhost = (tabhost)findviewbyid(android.r.id.tabhost);              /** tid1 firsttabspec id. used access outside. */             tabspec firsttabspec = tabhost.newtabspec("tid1");             tabspec secondtabspec = tabhost.newtabspec("tid2");             tabspec thirdtabspec = tabhost.newtabspec("tid3");             tabspec fourthtabspec = tabhost.newtabspec("tid4");              /** tabspec setindicator() used set name tab. */             /** tabspec setcontent() used set content particular tab. */             firsttabspec.setindicator(new myview(this, r.drawable.tabhome, "home")).setcontent(new intent(this,firstgroup.class));             secondtabspec.setindicator(new myview(this, r.drawable.tabmsg, "msgs")).setcontent(new intent(this,firstgroup.class));             thirdtabspec.setindicator(new myview(this, r.drawable.tabprofil, "profil")).setcontent(new intent(this,firstgroup.class));             fourthtabspec.setindicator(new myview(this, r.drawable.tabmehr, "mehr...")).setcontent(new intent(this,firstgroup.class));              /** add tabspec tabhost display. */             tabhost.addtab(firsttabspec);             tabhost.addtab(secondtabspec);             tabhost.addtab(thirdtabspec);             tabhost.addtab(fourthtabspec);              tabhost.setcurrenttab(0);     }      //layout of tabs     private class myview extends linearlayout {         public myview(context c, int drawable, string label) {             super(c);              linearlayout la = new linearlayout(c);             //la.setbackgroundcolor(color.parsecolor("#3b5091"));             la.setorientation(linearlayout.vertical);             la.setminimumheight(63);             la.setpadding(0,8,0,0);              imageview iv = new imageview(c);             textview tv = new textview(c);              iv.setimageresource(drawable);              setpadding(0,0,2,0);             setorientation(linearlayout.vertical);              tv.settext(label);             tv.setgravity(0x01); /* center */              tv.settextcolor(color.white);              la.addview(iv);             la.addview(tv);             addview(la);             setbackgrounddrawable( getresources().getdrawable(r.drawable.tab_indicator));          }      } 

firstgroup-class

public class firstgroup extends activitygroup {            // keep in static variable make accessible nesten activities, lets them manipulate view       public static firstgroup group;            // need keep track of history if want back-button work properly, don't use if activities requires lot of memory.       private arraylist<view> history;        @override       protected void oncreate(bundle savedinstancestate) {             super.oncreate(savedinstancestate);             this.history = new arraylist<view>();             group = this;                  // start root activity withing group , view             view view = getlocalactivitymanager().startactivity("citiesactivity", new                                               intent(this,citiesactivity.class)                                               .addflags(intent.flag_activity_single_top))                                               .getdecorview();                  // replace view of activitygroup             replaceview(view);           }        public void replaceview(view v) {                   // adds old 1 history           history.add(v);                   // changes groups view new view.           setcontentview(v);       }        public void back() {           if(history.size() > 0) {               history.remove(history.size()-1);               setcontentview(history.get(history.size()-1));           }else {               finish();           }       }        @override     public boolean onkeydown(int keycode, keyevent event)     {     if(keycode == keyevent.keycode_back)     {     firstgroup.group.back();     return true;     }     return super.onkeydown(keycode, event);     }  }   

i'm not sure you're looking if want change values when user returns specific tab can in onresume method of activity.