Checking a checkbox in listview makes other random checkboxes checked too

Question

whenever i check a checkbox in my listview , other random checkboxes get checked too . It could be due to item recycling by listview.

I also tried setting android:f

Answer 1

When a listview recycles views , it recycles its present state as well as listeners attached to it. In my example, if the checkbox was checked and has a onCheckedChangeListener set, both will remain a part of recycled view based on position. So it is our responsibility to reset all states and remove previous listeners.

So when I was unchecking the recycled view, the onCheckedChange listener was getting executed. one line made the program work perfectly. The listener was removed by :

holder.ckbox.setOnCheckedChangeListener(null); 

Below is the working code of Adapter for people who may stumble upon this problem:

public class MyCustomAdapter extends ArrayAdapter  {

private List appInfoList;
private LayoutInflater mInflater;
private PackageManager pm;
ArrayList positionArray;
private Context ctx;
int[] visiblePosArray;
private volatile int positionCheck; 

public MyCustomAdapter(Context context, List myList) {
    super(context, NO_SELECTION);
    appInfoList = myList;
    ctx=context;
    mInflater =     (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    pm = context.getPackageManager();

    positionArray = new ArrayList(myList.size());
    for(int i =0;i

}