android - how to set layout for a fragment? -

it's multi tap activity >> i'm trying set layout each tab doesnt work ! shows nothing in both tabs !

here's code

 public class game extends activity {       public static context appcontext;      /** called when activity first created. */     @override     public void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.game);          //actionbar gets initiated         actionbar actionbar = getactionbar();        //tell actionbar want use tabs.         actionbar.setnavigationmode(actionbar.navigation_mode_tabs);        //initiating both tabs , set text it.         actionbar.tab roundtab = actionbar.newtab().settext("round 55");         actionbar.tab scoretab = actionbar.newtab().settext("score 55");        //create 2 fragments want use display content         fragment roundfragment = new roundfragment();         fragment scorefragment = new scorefragment();       //set tab listener. can listen clicks.         roundtab.settablistener(new mytabslistener(roundfragment));         scoretab.settablistener(new mytabslistener(scorefragment));       //add 2 tabs actionbar         actionbar.addtab(roundtab);         actionbar.addtab(scoretab);     }        class mytabslistener implements actionbar.tablistener {         public fragment fragment;          public mytabslistener(fragment fragment) {             this.fragment = fragment;         }           public void ontabreselected(tab tab, fragmenttransaction ft) {         }          public void ontabselected(tab tab, fragmenttransaction ft) {          }          public void ontabunselected(tab tab, fragmenttransaction ft) {         }      }      public class roundfragment extends fragment {          @override         public view oncreateview(layoutinflater inflater, viewgroup container, bundle savedinstancestate) {              // inflate layout fragment             return inflater.inflate(r.layout.round, container, false);         }      }      public class scorefragment extends fragment {          @override         public view oncreateview(layoutinflater inflater, viewgroup container, bundle savedinstancestate) {              // inflate layout fragment             return inflater.inflate(r.layout.score, container, false);         }      }    } 

your ontabselected() empty. that's why shows nothing on selection.

add code ontabselected() of mytabslistener .

 public void ontabselected(tab tab, fragmenttransaction ft) {            ft.add([id container /viewgroup in have load     fragment],fragment)         }