android - Custom Adapter getView() method is not called -

here code of fragment in setting custom adapter list.

there no errors listview empty. have implemented getcount() returns right number of items in arraylist. don't see ("inside", "getview") in logcat

fragment

public class servicecarlistfragment extends fragment {      private string url;     private arraylist<cardetail> cardetaillist = new arraylist<cardetail>();     private carlistadapter adapter;     private listview mlist;      @override     public void oncreate(bundle savedinstancestate) {         // todo auto-generated method stub         super.oncreate(savedinstancestate);         url = getactivity().getintent().getstringextra("url");         new downloadcardetail().execute(url);     }      @override     public view oncreateview(layoutinflater inflater, viewgroup container,                              bundle savedinstancestate) {         // todo auto-generated method stub         view v = inflater.inflate(r.layout.fragment_service_car_list, container, false);         mlist = (listview) v.findviewbyid(r.id.list);         mlist.setadapter(adapter);          (cardetail car : cardetaillist) {             // start loading images each student             car.loadimage(adapter);         }         return v;     }      class downloadcardetail extends asynctask<string, string, arraylist<cardetail>> {          @override         protected arraylist<cardetail> doinbackground(string... params) {             // todo auto-generated method stub             arraylist<cardetail> cardetaillist = jsonparser.parsejson(params[0]);             return cardetaillist;         }          @override         protected void onpostexecute(arraylist<cardetail> cardetaillist) {             // todo auto-generated method stub             servicecarlistfragment.this.cardetaillist = cardetaillist;             log.d("dccs", string.valueof(servicecarlistfragment.this.cardetaillist.size()));             adapter = new carlistadapter(getactivity(), servicecarlistfragment.this.cardetaillist);             log.d("dccs", string.valueof((adapter.getcount())));         }      } } 

customadapter

public class carlistadapter extends baseadapter {      private arraylist<cardetail> items = new arraylist<cardetail>();     private context context;      public carlistadapter(context context, arraylist<cardetail> items) {         this.context = context;         this.items = items;     }      @override     public int getcount() {         // todo auto-generated method stub         return items.size();     }      @override     public object getitem(int position) {         // todo auto-generated method stub         return items.get(position);     }      @override     public long getitemid(int position) {         // todo auto-generated method stub         return position;     }      @override     public view getview(int position, view convertview, viewgroup parent) {         // todo auto-generated method stub         log.d("inside", "getview");         layoutinflater minflater = (layoutinflater) context.getsystemservice(activity.layout_inflater_service);         viewholder holder = null;         cardetail car = items.get(position);          if (convertview == null) {             convertview = minflater.inflate(r.layout.car_list_row, null);             holder = new viewholder();             holder.tvcarname = (textview) convertview.findviewbyid(r.id.tvcarname);             holder.tvdailypricevalue = (textview) convertview.findviewbyid(r.id.tvweeklypricevalue);             holder.tvweeklypricevalue = (textview) convertview.findviewbyid(r.id.tvweeklypricevalue);             holder.imgcar = (imageview) convertview.findviewbyid(r.id.imgcar);             convertview.settag(holder);         } else {             holder = (viewholder) convertview.gettag();         }          holder.tvcarname.settext(car.getcarname());         if (car.getimage() != null) {             holder.imgcar.setimagebitmap(car.getimage());         } else {             // default image             holder.imgcar.setimageresource(r.drawable.ic_action_call);         }          return convertview;     }      static class viewholder {         textview tvcarname;         textview tvdailypricevalue;         textview tvweeklypricevalue;         imageview imgcar;     }  } 

the reasons getview not called are:

1. getcount returns 0
2. you forget call setlistadapter on listview.
3. if listview's visibility (or container's visibility) gone. @taynãbonaldo valuable input
4. listview not attached viewport layout. is, mlistview = new listview(...) used without mylayout.addview(mlistview)

in onpostexcute, after create new instance of carlistadapter suggest update new instance listview. indeed need call again

 mlist.setadapter(adapter); 

edit: setadapter should called on ui thread, avoid unexpected behaviours

edit2:

the same applies recyclerview. make sure that

• getitemcount returning value grater 0 (usually dataset size)
• both setlayoutmanager , setadapter have called on ui thread
• the visibility of widget has set visible