android - AsyncTask doesn`t work in custom adapter -

i`m create list of points of sales sqlite using custom adapter

    dbhelper = new yourvoicedatabasehelper(getactivity());      pointslist = new arraylist<point>();     list<point> pl = new arraylist<point>();     pointslistarrayadapter adapter;      adapter =  new pointslistarrayadapter(getactivity().getapplicationcontext(),             pointslist,             getactivity().getfilesdir(),             getresources().getstring(r.string.local_resorces_folder),             dbhelper);      pointslistview.setadapter(adapter);      pl =  dbhelper.getallpoints();      if(mylocation != null) {         (point el : pl) {             ellocation.setlatitude(double.parsedouble(el.getlatitude()));             ellocation.setlongitude(double.parsedouble(el.getlongtitude()));              if (mylocation.distanceto(ellocation) <= 999) {                 pointslist.add(el);             }         }     } else {         toast.maketext(getactivity(), "Не удалось определить ваше местоположение, проверте ваши разрешения и настройки",                 toast.length_long).show();     } adapter.notifydatasetchanged(); 

to custom adapter send instance of database ad using in there , slows main tread. i`m trying use asynctask in adapter images path database , set images async absolutely nothing

    package ua.com.it_artel.tvoy_golos.service; 

public class pointslistarrayadapter extends baseadapter {

context context; private list<point> pointslist; private file appfolder; private string resoursesfolder; private yourvoicedatabasehelper dbhelper; private string imagepath;  public pointslistarrayadapter(context context, list<point> pointslist, file appfolder, string resoursesfolder, yourvoicedatabasehelper dbhelper) {     this.context = context;     this.pointslist = pointslist;     this.appfolder = appfolder;     this.resoursesfolder = resoursesfolder;     this.dbhelper = dbhelper; }  @override public int getcount() {     return pointslist.size(); }  @override public object getitem(int position) {     return pointslist.get(position); }  @override public long getitemid(int position) {     return pointslist.get(position).getid(); }  static class viewholder {     imageview image;     textview adress;     textview name;     textview distance;     location ellocation;     point point; }  @override public view getview(int position, view convertview, viewgroup parent) {      viewholder viewholder;     view rowview = convertview;     if(convertview == null){         layoutinflater inflater = (layoutinflater) context.getsystemservice(context.layout_inflater_service);         rowview = inflater.inflate(r.layout.list_element_layout_type_1, parent, false);          viewholder = new viewholder();         viewholder.ellocation = new location("");          viewholder.image = (imageview) rowview.findviewbyid(r.id.item_image);          viewholder.adress = (textview) rowview.findviewbyid(r.id.item_text);          viewholder.name = (textview) rowview.findviewbyid(r.id.item_name);          viewholder.distance = (textview) rowview.findviewbyid(r.id.item_distance);          rowview.settag(viewholder);     } else {         viewholder = (viewholder) rowview.gettag();     }      viewholder.ellocation.setlatitude(double.parsedouble(pointslist.get(position).getlatitude()));     viewholder.ellocation.setlongitude(double.parsedouble(pointslist.get(position).getlongtitude()));      viewholder.point = pointslist.get(position);     new adapterimagesetter().execute(viewholder);      viewholder.adress.settext(pointslist.get(position).getaddress());      viewholder.name.settext(dbhelper.getpartnerbyuid(pointslist.get(position).getpartneruid()).getname());      viewholder.distance.settext(string.valueof(math.round(mylocationlistener.mylocation.distanceto(viewholder.ellocation))) + " м");      return rowview;  }  private class adapterimagesetter extends asynctask<viewholder, void, viewholder> {      @override     protected viewholder doinbackground(viewholder... params) {         viewholder viewholder = params[0];          imagepath = dbhelper.getpointspartnerimage(viewholder.point.getpartneruid());          if (imagepath.equals("")) {             viewholder.image.setimageresource(r.drawable.no_image);         } else {             drawable dr = drawable.createfrompath(appfolder.getpath() + "/" + resoursesfolder + "/" + imagepath);             viewholder.image.setimagedrawable(dr);         }         return viewholder;     } } 

}

i have tried different variations in asynctask , runnable doesn`t work, if there no code.. hope u understand english , give advice

you can not perform ui related operations in doinbackground method ui related operation use onpostexcecute method more asynch task http://developer.android.com/reference/android/os/asynctask.html

in code you setting imege

if (imagepath.equals("")) {             viewholder.image.setimageresource(r.drawable.no_image);         } else {             drawable dr = drawable.createfrompath(appfolder.getpath() + "/" + resoursesfolder + "/" + imagepath);             viewholder.image.setimagedrawable(dr);         } 

just add code in onpostexecute