Android - Can change button color in listview -

can change button color in listview simplecursoradapter or use object can use color stripe show type , how can use problem.

    public class coloradapter extends simplecursoradapter {     private context context;      public coloradapter(context context, int layout, cursor c,             string[] from, int[] to) {         super(context, layout, c, from, to);         this.context = context;     }      public int getcount() {         // todo auto-generated method stub         return myarrlist.size();     }      public object getitem(int position) {         // todo auto-generated method stub         return position;     }      public long getitemid(int position) {         // todo auto-generated method stub         return position;     }      public view getview(int position, view convertview, viewgroup parent) {         if (convertview == null) {             layoutinflater inflater = (layoutinflater) context                     .getsystemservice(context.layout_inflater_service);             convertview = inflater.inflate(r.layout.event_list, null);         }          button btype = (button) findviewbyid(r.id.ctype);          if (myarrlist.get(position).get("eventtype")                 .equalsignorecase("red")) {             btype.setbackgroundcolor(color.red);         } else if (myarrlist.get(position).get("eventtype")                 .equalsignorecase("black")) {             btype.setbackgroundcolor(color.black);         } else {             btype.setbackgroundcolor(color.blue);         }           textview tname = (textview) convertview.findviewbyid(r.id.ename);         tname.settext(myarrlist.get(position).get("eventname"));          textview tdetail = (textview) convertview                 .findviewbyid(r.id.edetail);// ãÊè¢éÍÁÙÅ·ÕÅÐÊèǹ         tdetail.settext(myarrlist.get(position).get("eventdetail"));          return convertview;     } } 

my code not work can me...

you suppose access button in getview() using convertview instance. after can access , change button color.

change below line

button btype = (button) findviewbyid(r.id.ctype); 

to below:

 button btype = (button) convertview.findviewbyid(r.id.ctype); 

also return item id arraylist in below method:

public object getitem(int position) {      return myarrlist.get(position); }