android - Strange behaviour ArrayList.remove(); -

i running issue , can't seem solve on own.

i trying remove item listview .remove(postion); , .notifydatasetchanged(position); removing wrong position.

here code

    @override     public view getview(int position, view convertview, viewgroup parent) {          try {             viewholder holder;             final string[] parts;             final string uuidbeacon;             uuidbeacon = arrayl.get(position).getproximityuuid().tostring();             minorbeacon = arrayl.get(position).getminor();             rangebeacon = arrayl.get(position).getaccuracy();             parts = fetchtums(uuidbeacon).split("::");              if (convertview != null) {                 holder = (viewholder) convertview.gettag();             }             else{                  if(parts[0].equals("1")) {                     holder = new viewholder(convertview = inflater.inflate(r.layout.tupple_monitoring, null));                     holder.beacon_image.setimagedrawable(gettumimage("http://127.0.0.1/uploads/face/" + parts[4]));                     holder.beacon_uuid.settext(parts[1]);                     holder.beacon_txpower.settext(string.valueof(position));                 }                 if(parts[0].equals("0"))                 {                     holder = new viewholder(convertview = inflater.inflate(r.layout.tupple_monitoring, null));                     holder.beacon_txpower.settext(string.valueof(position));                     toremovestring = toremovestring + string.valueof(position) + "::";                 }                 if(parts[2].equals("1"))                 {                     holder = new viewholder(convertview = inflater.inflate(r.layout.tupple_monitoring, null));                     holder.beacon_image.setimagedrawable(gettumimage("http://127.0.0.1/uploads/face/" + parts[4]));                     holder.beacon_uuid.settext(parts[1]);                     holder.beacon_txpower.settext("hier misschien wat text?");                     holder.beacon_row.setbackgroundcolor(color.parsecolor("#b6b6b6"));                     holder.image_lock.setvisibility(view.visible);                 }              }             if (arrayl.get(position).getproximityuuid() != null)               list.setonitemclicklistener(new adapterview.onitemclicklistener()             {                 @override                 public void onitemclick(adapterview<?> parent, view view, int position, long id )                 {                     //list.setitemchecked(position, true);                     //view.setbackgroundcolor(color.blue);                     final string[] parts;                    parts = fetchtums(arrayl.get(position).getproximityuuid().tostring()).split("::");                     if(parts[2].equals("1")){                         pin(parts[3], parts[1]);                    }                    else{                         if(parts[3] != null){                             openpage(parts[3], "", parts[1]);                         }                    }                 }             });         } catch (exception e) {             e.printstacktrace();         }           return convertview;     } 

the part above works fine list view 2 items position 0 , 1 , know items have correct postion write position in them in textview.

the function remove item is:

public void toremovefunc() {     arrayl.remove(0);     adapter.notifydatasetchanged(); } 

it called on button click.

but happens strange when click button remove item position 1 , if click again remove item position 0. if change arrayl.remove(0); arrayl.remove(1); remove item position 1 , if click again crashes expected. want remove postion 0 , keep position 1.

your code working, after converting "convertview" not updating values.

viewholder holder;         final string[] parts;         final string uuidbeacon;         uuidbeacon = arrayl.get(position).getproximityuuid().tostring();         minorbeacon = arrayl.get(position).getminor();         rangebeacon = arrayl.get(position).getaccuracy();         parts = fetchtums(uuidbeacon).split("::");          if (convertview != null) {             holder = (viewholder) convertview.gettag();         }         else{ holder = new viewholder(convertview = inflater.inflate(r.layout.tupple_monitoring, null)); }             if(parts[0].equals("1")) {              holder.beacon_image.setimagedrawable(gettumimage("http://127.0.0.1/uploads/face/" + parts[4]));                 holder.beacon_uuid.settext(parts[1]);                 holder.beacon_txpower.settext(string.valueof(position));             }             if(parts[0].equals("0"))             {                  holder.beacon_txpower.settext(string.valueof(position));                 toremovestring = toremovestring + string.valueof(position) + "::";             }             if(parts[2].equals("1"))             {                  holder.beacon_image.setimagedrawable(gettumimage("http://127.0.0.1/uploads/face/" + parts[4]));                 holder.beacon_uuid.settext(parts[1]);                 holder.beacon_txpower.settext("hier misschien wat text?");                 holder.beacon_row.setbackgroundcolor(color.parsecolor("#b6b6b6"));                 holder.image_lock.setvisibility(view.visible);             }