android - Random tick/check while checking my checkbox in Custom Listview -

while checking checkbox in custom listview or scroll or down checking has been done checkbox have not clicked or touched. here i'm attaching getview method,

@override public view getview(int position, view convertview, viewgroup parent) {      if (translist != null) {         final int pos = position;         if (convertview == null) {             convertview = inflater.inflate(r.layout.export_item_list, null);             checkbox = (checkbox) convertview.findviewbyid(r.id.export_chk);             txtordno = (textview) convertview.findviewbyid(r.id.txt_exportordno);             txtorddate = (textview) convertview.findviewbyid(r.id.txt_exportdate);             txtordstatus = (textview) convertview.findviewbyid(r.id.txt_exportstatus);             convertview.settag(new ordersviewholder(checkbox, txtordno,                         txtorddate, txtordstatus));             // checkbox click function             checkbox.setonclicklistener(new view.onclicklistener() {                 public void onclick(view v) {                     checkbox cb = (checkbox) v;                     if (cb.ischecked()) {                         cb.setchecked(true);                         // save item in preference                         string itemname = translist.get(pos).gethhtran_referencenumber();                         supporter.saveorderinpreference(itemname, 1);                          //to check , uncheck selectall checkbox                         if(!selectall.ischecked()) {                              boolean selectcheck = true;                             int c=exportitems.getchildcount();                             for(int i=0; i<exportitems.getchildcount();i++) {                                 linearlayout listviewlayout = (linearlayout) exportitems.getchildat(i);                                 checkbox chkbox = (checkbox) listviewlayout.findviewbyid(r.id.export_chk);                                 system.out.println("i="+i);                                 if(!chkbox.ischecked()) {                                     selectcheck = false;                                     system.out.println("i inside="+i);                                     break;                                 }                             }                                  if(selectcheck){                                     selectall.setchecked(true);                                     supporter.setselectallcheckedfororder();                                 }                              }                         } else {                             cb.setchecked(false);                             supporter.removeorderfrompreference(translist.get(pos).gethhtran_referencenumber());                              //to check , uncheck selectall checkbox                             if(selectall.ischecked()) {                                 selectall.setchecked(false);                                 supporter.setselectallnotcheckedfororder();                             }                         }                     }                 });                  boolean isexist = isorderexist(translist.get(pos).gethhtran_referencenumber());                  if (isexist) {                     // set qty                     // int qty =                     // getmyitem(reciptlist.get(pos).gethhreceipt_docnumber());                     checkbox.setchecked(true);                 } else {                     checkbox.setchecked(false);                 }              } else {                 ordersviewholder viewholder = (ordersviewholder) convertview                         .gettag();                 checkbox = viewholder.getcheckbox();                 txtordno = viewholder.gettxtordno();                 txtorddate = viewholder.gettxtorddate();                 txtordstatus = viewholder.gettxtordstatus();             }              int day = translist.get(position).gethhtran_transday();             int month = translist.get(position).gethhtran_transmonth();             int year = translist.get(position).gethhtran_transyear();             string strdate = supporter.getstringdate(year, month, day);              int stusval = translist.get(position).gethhtran_status();             system.out.println("order status:"+stusval);             string strstaus = "";             if (stusval == 0) {                 strstaus = "new";             } else {                 strstaus = "exported";             }           txtordno.settext(translist.get(position).gethhtran_referencenumber());             txtorddate.settext(strdate);             txtordstatus.settext(strstaus);         }         return convertview;     } 

please me out resolve it.

you're setting checked status in convertview == null branch. you're not setting in else branch, checked status of recycled checkbox retained.

just move code sets checkbox checked status out of if-else set both new , recycled views.