android - How to update image of ImageView in Custom ListView -

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i trying click on imageview of custom listview , want change image on onclick event. able click on success other operation images not reflected of imageview.

here code reference. 

public class reminderadapter extends baseadapter {  private activity activity;    private static layoutinflater inflater=null; imageview firststar,secondstar,thirdstar,fourthstar,fifthstar;     public reminderadapter(activity a, arraylist<hashmap<string, string>> d) {     activity = a;     data=d;     inflater = (layoutinflater)activity.getsystemservice(context.layout_inflater_service);     facebold = typeface.createfromasset(activity.getassets(),             "fonts/eau_sans_bold.otf");     facenormal = typeface.createfromasset(activity.getassets(),             "fonts/eau_sans_book.otf");           }  public int getcount() {     return data.size(); } public object getitem(int position) {     return position; } public long getitemid(int position) {     return position; }     public view getview(int position, view convertview, viewgroup parent) {     view vi=convertview;              if(activity instanceof searchdishoom)    {        if(convertview==null)            vi = inflater.inflate(r.layout.remind_dish_list_row, null);                 firststar = (imageview)vi.findviewbyid(r.id.hotellistfirststar);        secondstar = (imageview)vi.findviewbyid(r.id.hotellistsecondstar);        thirdstar = (imageview)vi.findviewbyid(r.id.hotellistthirdstar);        fourthstar = (imageview)vi.findviewbyid(r.id.hotellistfourthstar);        fifthstar = (imageview)vi.findviewbyid(r.id.hotellistfifthstar);        firststar.setfocusable(false);        secondstar.setfocusable(false);        thirdstar.setfocusable(false);        fourthstar.setfocusable(false);        fifthstar.setfocusable(false);                    firststar.setonclicklistener(new view.onclicklistener() {          @override         public void onclick(view arg0) {             setstar(1);          }     });        secondstar.setonclicklistener(new view.onclicklistener() {          @override         public void onclick(view arg0) {             //reminderlist.clear();             setstar(2);                          }     });        thirdstar.setonclicklistener(new view.onclicklistener() {          @override         public void onclick(view arg0) {             setstar(3);                          }     });        fourthstar.setonclicklistener(new view.onclicklistener() {          @override         public void onclick(view arg0) {             setstar(4);                          }     });        fifthstar.setonclicklistener(new view.onclicklistener() {          @override         public void onclick(view arg0) {                             setstar(5);                          }     });               }            return vi; }     public void setstar(int btnnumber) {     if (btnnumber == 1) {                 firststar.setimageresource(r.drawable.rated);         secondstar.setimageresource(r.drawable.unrated);         thirdstar.setimageresource(r.drawable.unrated);         fourthstar.setimageresource(r.drawable.unrated);         fifthstar.setimageresource(r.drawable.unrated);         //postrating(1);     }     if (btnnumber == 2) {                     firststar.setimageresource(r.drawable.rated);         secondstar.setimageresource(r.drawable.rated);         thirdstar.setimageresource(r.drawable.unrated);         fourthstar.setimageresource(r.drawable.unrated);         fifthstar.setimageresource(r.drawable.unrated);         //postrating(2);     }     if (btnnumber == 3) {                     firststar.setimageresource(r.drawable.rated);         secondstar.setimageresource(r.drawable.rated);         thirdstar.setimageresource(r.drawable.rated);         fourthstar.setimageresource(r.drawable.unrated);         fifthstar.setimageresource(r.drawable.unrated);         //postrating(3);     }     if (btnnumber == 4) {          firststar.setimageresource(r.drawable.rated);         secondstar.setimageresource(r.drawable.rated);         thirdstar.setimageresource(r.drawable.rated);         fourthstar.setimageresource(r.drawable.rated);         fifthstar.setimageresource(r.drawable.unrated);         //postrating(4);     }     if (btnnumber == 5) {          firststar.setimageresource(r.drawable.rated);         secondstar.setimageresource(r.drawable.rated);         thirdstar.setimageresource(r.drawable.rated);         fourthstar.setimageresource(r.drawable.rated);         fifthstar.setimageresource(r.drawable.rated);         //postrating(5);     } }

i don't understand happening. please give me reference or hint.
in advance.

try this

 firststar.setonclicklistener(new view.onclicklistener() {          @override         public void onclick(view arg0) {             setstar(1);             listadapter.notifydatasetchanged();         }     });

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