GridView: Attempt to invoke virtual method.view.View android.view.LayoutInflater.inflate(int, android.view.ViewGroup)' on a null object reference -

i have listview , i'm trying go gridview onitemcliclick listener. have exception on adapter put can't solve it.

the list view fragment , works well!

the exception is:

java.lang.nullpointerexception: attempt invoke virtual method 'android.view.view android.view.layoutinflater.inflate(int, android.view.viewgroup)' on null object reference @ com.rt_no.myprogect.ui.adapter.careerimageadapter.getview(careerimageadapter.java:52)

at line in gridview adapter:

convertview = layoutinflater.inflate(r.layout.career_grid_view, null); 

the listview:

public class citiesfragment extends fragment   {     private static final string tag ="citiesfragment";      private listview citylist;     private arraylist<city> cities;     private citiesadapter citiesadapter;     private citiesfragmentlistener listener;      private context context;      private gridview gridview;      @override     public void onattach(context context) {         super.onattach(context);         log.d(tag, "onattach_citiesfragment");         listener = (citiesfragmentlistener) context;     }      @override     public view oncreateview(layoutinflater inflater,  viewgroup container, bundle savedinstancestate) {         log.d(tag, "oncreateview_citiesfragment");         view view = inflater.inflate(r.layout.cities_list_view_fragment, null);         return view;     }      private arraylist<city> initcities(){.....}      private void initgridview(fragment fragment){         log.d(tag, "citiesfragment_initgridview");         fragmenttransaction fragmenttransaction = getfragmentmanager().begintransaction();         fragmenttransaction.replace(r.id.container,fragment);         fragmenttransaction.addtobackstack("fragment");         fragmenttransaction.settransition(fragmenttransaction.transit_fragment_fade);         fragmenttransaction.commit();     }       @override     public void onviewcreated(view view, @nullable bundle savedinstancestate) {         super.onviewcreated(view, savedinstancestate);         log.d(tag, "onviewcreated_citiesfragment");         cities = initcities();         citylist = (listview) view.findviewbyid(r.id.citylist);         citiesadapter = new citiesadapter(getactivity(), cities);         citylist.setadapter(citiesadapter);         citylist.setonitemclicklistener(new adapterview.onitemclicklistener() {             @override             public void onitemclick(adapterview<?> parent, view view, int position, long id) {                 log.d(tag, "onitemclick_citiesfragment position : " + cities.get(position).getcityname());                 gridviewfragment fragment = new gridviewfragment();                 initgridview(fragment);             }         });     } 

the gridview:

public class gridviewfragment extends fragment {     private static final string tag = "gridviewfragment";      private citiesfragmentlistener listener;     private gridview gridview;     private careerimageadapter careerimageadapter;     private int position;      @nullable     @override     public view oncreateview(layoutinflater inflater, @nullable viewgroup container, bundle savedinstancestate) {         log.d(tag, "oncreateview_gridviewfragment");         view view = inflater.inflate(r.layout.career_grid_view, null);         gridview = (gridview) view.findviewbyid(r.id.careergridview);          return view;     }      @override     public void onviewcreated(view view, @nullable bundle savedinstancestate) {         super.onviewcreated(view, savedinstancestate);         log.d(tag, "onviewcreated_gridviewfragment");         gridview = (gridview) view.findviewbyid(r.id.careergridview);         gridview.setadapter(new careerimageadapter(getactivity()));         gridview.setonitemclicklistener(new adapterview.onitemclicklistener() {             @override             public void onitemclick(adapterview<?> parent, view view, int position, long id) {                 log.d(tag, "onitemclick_gridviewfragment position : " + position);                  // go workers_list_view_fragment layout              }         });     } 

the gridview adapter:

public class careerimageadapter extends baseadapter {     private static final string tag = "careerimageadapter";      private context mcontext;     private layoutinflater layoutinflater;       public careerimageadapter (context c){          mcontext = c;      }      @override     public int getcount() {         return imageides.length;     }      @override     public careerimageadapter getitem(int position) {         return null;     }      @override     public long getitemid(int position) {         return position;     }      @override     public view getview(int position, view convertview, viewgroup parent) {         imageview imageview ;          if (convertview == null){             convertview= layoutinflater.inflate(r.layout.career_grid_view, null);             imageview = new imageview(mcontext);             imageview.setlayoutparams(new gridview.layoutparams(180, 180));             imageview.setscaletype(imageview.scaletype.fit_end);             imageview.setpadding(8, 8, 8, 8);         }else {             imageview = (imageview) convertview;         }         imageview.setimageresource(imageides[position]);         return convertview;     }      private integer[] imageides =             {                 r.drawable.afar,r.drawable.asbaka,r.drawable.bnya,                 r.drawable.cnstractors,r.drawable.doors,r.drawable.etom,                 r.drawable.floring,r.drawable.foxy,r.drawable.garnolet,                 r.drawable.gaz,r.drawable.geves,r.drawable.ginoon,                 r.drawable.halbashateven,r.drawable.hashmal,r.drawable.instltsya,                 r.drawable.kvesatshatyah,r.drawable.mazgan,r.drawable.meshlowah,                 r.drawable.pargolot,r.drawable.pegom,r.drawable.pinoyafpa,                 r.drawable.robah,r.drawable.tyah,             }; } 

layoutinflater never initialized. add in careerimageadapter constructor:

layoutinflater = layoutinflater.from(c);