listview - Android - Unable to increment or decrement value from list item -

hi using custom listview getting data server , show in listview.. able data , show in listview dont know implement click event of button inside listitem. there 2 buttons increement , decrement qty. clicklistener working not working in right manner. please me correcting issue. did search many postrs in stack overflow unable understand it...

here adapter class

    private activity activity; private layoutinflater inflater; private list<feeditem> feeditems; private list<feeditem> filteredfeeditems; imageview plus; imageview minus; int qty = 0;  string result; string formatteddate; int id;    public feedlistadapter(activity activity, list<feeditem> feeditems) {     this.activity = activity;     this.feeditems = feeditems;     this.filteredfeeditems = feeditems; }  @override public int getcount() {     return filteredfeeditems.size(); }  @override public object getitem(int position) {     return filteredfeeditems.get(position); }  @override public long getitemid(int position) {     return position; }  @override public view getview(int position, view convertview, viewgroup parent) {      if (inflater == null)         inflater = (layoutinflater) activity         .getsystemservice(context.layout_inflater_service);     if (convertview == null)         convertview = inflater.inflate(r.layout.feed_item, null);      feeditem item = filteredfeeditems.get(position);      id = item.getid();     convertview.settag(integer.valueof(id));      textview date = (textview) convertview.findviewbyid(r.id.name);     textview initiator = (textview) convertview             .findviewbyid(r.id.timestamp4);     textview assignto = (textview) convertview.findviewbyid(r.id.timestamp);      final textview location = (textview) convertview.findviewbyid(r.id.timestamp2);      //textview category = (textview) convertview.findviewbyid(r.id.category);       data.settext(item.getdata();     price     .settext(item.getprice());     description.settext(item.getdescription());        plus = (imageview) convertview.findviewbyid(r.id.btnaddtocart1);       plus.settag(item.getid());     plus.setonclicklistener(new view.onclicklistener() {         public void onclick(view view) {             int position = (integer) view.gettag();               //convertview.settag(integer.valueof(id));             feeditem item = filteredfeeditems.get(position);             item.quantity++;             location.settext(string.valueof(item.quantity));          }     });        minus = (imageview) convertview.findviewbyid(r.id.btnaddtocart5);     minus.setonclicklistener(new view.onclicklistener() {         public void onclick(view view) {               integer taggedposition = (integer) view.gettag();     if (qty>0){         //minus.setimageresource(r.drawable.minus_pressed);             qty--;             location.settext(string.valueof(qty));     }      else{          qty = 0;     }         }     });      return convertview; } 

this feeditem class:

public class feeditem {   int quantity = 0;  int id;   public feeditem(int id,int quantity){     super();     this.id = id;     this.quantity = quantity;  }  public int getid() {     return id; }  public void setid(int id) {     this.id = id; }     public int getquantity() {         return quantity;     }      public void setquantity(int quantity) {         this.quantity = quantity;     } 

currently have 1 variable per activity store quantity. if want store per item, should add: int qty; member in feeditem class.

remove:

convertview.settag(integer.valueof(id)); 

and similar plus, you'll need add:

minus.settag(item.getid()); 

then instead of qty++; or in every place in onclick instead of qty you'll need use item.qty:

integer id = view.gettag(); feeditem item = filteredfeeditems.get(id); item.qty++; location.settext(string.valueof(item.qty)); 

update:

i think you're mixing feeditem.id position. if you're not changing order / amount of items in list use position. instead of:

minus.settag(item.getid()); 

try:

minus.settag(position); 

and same plus