android - How to maintain position of list view row/item? -

i have custom listview containing textview, imageview, checkbox. in listview, nothing should checked/unchecked have block based on conditions.

tasks doing:

1. if checkbox checked should show image in imageview.

2. i don't want make checkbox checkable/enabled based on conditions.

below code custom adapter.

    public class customadapter  extends baseadapter {          private context context;         private arraylist<pojo> maindatalist;         private layoutinflater inflater = null;          public customadapter(context context, arraylist< pojo > maindatalist) {             this.context = context;             this.maindatalist = maindatalist;             inflater = ( layoutinflater ) context.getsystemservice(context.layout_inflater_service);         }          @override         public int getcount() {             // todo auto-generated method stub             return maindatalist.size();         }          @override         public long getitemid(int position) {             // todo auto-generated method stub             return position;         }          @override         public pojo getitem(int position) {             // todo auto-generated method stub             return maindatalist.get(position);         }          public class holder         {             private textview name;             private imageview imageview;             private checkbox check;         }          @override         public view getview(final int position, view view, viewgroup parent) {             // todo auto-generated method stub             final holder holder;             if (view == null) {                 holder = new holder();                 view = inflater.inflate(r.layout.my_layout_file, null);                 holder.name = (textview) view.findviewbyid(r.id.textview_name);                 holder.imageview = (imageview) view.findviewbyid(r.id.img);                 holder.check = (checkbox) view.findviewbyid(r.id.checkbox);                  view.settag(holder);             } else {                 holder = (holder) view.gettag();             }              holder.check.settag(position);              if (maindatalist.get(position).iseditable()) {                     holder.check.setenabled(false);                     holder.check.setclickable(false);                 } else {                     holder.check.setenabled(true);                     holder.check.setclickable(true);                 }             }              holder.name.settext(maindatalist.get(position).getname());             holder.check.setchecked(maindatalist.get(position).isselected());              if (maindatalist.get(position).isselected())                         holder.imageview.setimageresource(r.drawable.ic_launcher);             else                 holder.imageview.setimageresource(null);              return view;         }     } 

my problems are:

1. on scroll, imageview shows images randomly irrespective of true condition.

2. on scroll, after every 4-5 list items/rows item non-checkable (my device shows 4-5 cells/rows/items on screen without scroll) item 1 non-checkable. simply, retrieves per getview() mechanism.

i know problem of maintaining list item position or listview's recycling on scroll. how this?

you have condition such as:

if (maindatalist.get(position).isselected())            holder.imageview.setimageresource(r.drawable.ic_launcher); 

which means if model has property selected true set image resource image view. problem lies beneath fact, whenever scroll , isselected() yields false, not anything. because re-using views, getting old views @ point have had isselected() true. might false, haven't specified condition that.

my suggestion in terms of:

if (maindatalist.get(position).isselected())  {     holder.imageview.setimageresource(r.drawable.ic_launcher); }  else  {      holder.imageview.setimageresource(null); }