Wrong reference in ListView Android? -

hi everyone,

i have issue stuck me 2 day, see image, start process #1 , update process process bar when scroll down see "process bar" run, has same process status first 1 (#1). guess mylistview items reused , use process bar too, 1 meet problem? attach code below,

thank reading

    class gridadapter extends baseadapter{      @override     public int getcount() {         // todo auto-generated method stub         return list.size();     }      @override     public object getitem(int position) {         // todo auto-generated method stub         return null;     }      @override     public long getitemid(int position) {         // todo auto-generated method stub         return 0;     }      @override     public view getview(int position, view convertview, viewgroup parent) {         // todo auto-generated method stub         string currenttext = list.get(position);         view cell = convertview;         if(cell==null){             layoutinflater inflater = mainactivity.this.getlayoutinflater();             cell = inflater.inflate(r.layout.gird_tiem, null);               viewholder viewholder = new viewholder();               viewholder.text = (textview) cell.findviewbyid(r.id.tv_test);               viewholder.button = (button) cell.findviewbyid(r.id.button);               viewholder.progressbar = (progressbar) cell.findviewbyid(r.id.process);               cell.settag(viewholder);         }           final viewholder holder = (viewholder) cell.gettag();          holder.text.settext(currenttext);          holder.button.setonclicklistener(new onclicklistener() {              @override             public void onclick(view v) {                 // todo auto-generated method stub                 processmanager.onadditemclick(100, holder.progressbar);             }         });         return cell;     }   }  static class viewholder {     public textview text;     public button button;     public progressbar progressbar;   } 

//my process manager

public class processmanager {  activity activity;  public processmanager(activity activity) {     super();     this.activity = activity; }  int temp; public void onadditemclick(final int tasks, final progressbar cell) {     new thread(new runnable() {          @override         public void run() {             for(int = 0;i<tasks;i++){                 temp = i;                 thread thread = new thread(new runnable() {                      @override                     public void run() {                         // todo auto-generated method stub                      }                 });                  thread.run();                 try {                     thread.sleep(500);                 } catch (interruptedexception e) {                     // todo auto-generated catch block                     e.printstacktrace();                 }                 activity.runonuithread(new runnable() {                      @override                     public void run() {                         // todo auto-generated method stub                         cell.setprogress((temp*100)/tasks);                     }                 });              }          }     }).start();    } 

//my item is

<?xml version="1.0" encoding="utf-8"?> 

<textview     android:id="@+id/tv_test"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:text="xxxx" />  <button     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:text="start process"     android:id="@+id/button"     android:focusable="false" />  <progressbar     android:id="@+id/process"     style="?android:attr/progressbarstylehorizontal"     android:layout_width="match_parent"     android:layout_height="wrap_content"     android:max="100" /> 

//my grid view

you need put

final viewholder holder = (viewholder) cell.gettag(); 

in else bracket after if(cell==null) statement. otherwise it's going create children tag every time (recycling views).