android intent - How to link a activity in gridview which has images and text using fragments to open a new activity? -

i wanted open next activity games in contain games wallpapers, whenever click on games on phone shows unfortunately app stopped.. next activity not opening... , please tell me how open image games activity on next activity gallery..

public class categoryfragment extends fragment {      gridview list;     string[] web = {             "games",             "movies",             "nature",             "celebrities",             "songs",             "sports",             "cute",             "cartoons",             "others"      } ;     integer[] imageid = {             r.drawable.cat1,             r.drawable.cat2,             r.drawable.cat3,             r.drawable.cat4,             r.drawable.cat5,             r.drawable.cat6,             r.drawable.cat7,             r.drawable.a1,             r.drawable.cat9,      };      @override     public view oncreateview(layoutinflater inflater, viewgroup container,                              bundle savedinstancestate) {          view rootview = inflater.inflate(r.layout.fragment_category, container, false);         list=(gridview) rootview.findviewbyid(r.id.list);         customlist = new customlist(getactivity(), web, imageid);         list.setadapter(a);          list.setonitemclicklistener(new adapterview.onitemclicklistener() {              @override             public void onitemclick(adapterview<?> parent, view view,                                     int position, long id) {                toast.maketext(getactivity(), "you clicked @ " +web[+ position], toast.length_short).show();                  string s = web[position];                 if (s.equals("games")) {                      toast.maketext(getactivity(), "games fragment", toast.length_short).show();                     intent i1 = new intent(getactivity(), games.class);                     startactivity(i1);                 }              }         });         return rootview;     } }