Checked checkboxes is unchecked when i scroll listview in xamarin android - xamarin

Question

Below is my GetView() method in adapter class, when I scroll the list view by selecting one checkbox. After scrolling back to initial position checked checkbox is getting unchecked.
public override View GetView (int position, View convertView, ViewGroup parent)
{
View view = convertView;
var item = mMyList [position];
//View holder
MyViewHolder holder = null;
if (view == null) {
holder = new MyViewHolder ();
view = mcontext.LayoutInflater.Inflate (Resource.Layout.listview_layout, null);
holder.mChecked = view.FindViewById<CheckBox> (Resource.Id.chkBox);
holder.Name = view.FindViewById<TextView> (Resource.Id.Name);
holder.StartDate = view.FindViewById<TextView> (Resource.Id.startDate);
holder.EndDate = view.FindViewById<TextView> (Resource.Id.endDate);
holder.Desc = view.FindViewById<TextView> (Resource.Id.Desc);
view.SetTag (holder);
} else {
holder = (MyViewHolder)view.Tag;
}
holder.Name.SetText (item.Name, TextView.BufferType.Normal);
holder.StartDate.SetText (item.StartDate, TextView.BufferType.Normal);
holder.EndDate.SetText (item.EndDate, TextView.BufferType.Normal);
holder.Desc.SetText (item.Description, TextView.BufferType.Normal);
return view;
}

Answer 1

It's simple!
You just need to store this "states" of checkboxes,because everytime when you scroll your listview, GetView method will be called(to draw hided items, Android reuses rows).
In your DataContext, for e.g. List<MyClass> , where MyClass represents:
public class MyClass
{
public string Name {get;set;}
public string SecondName {get;set;}
public bool IsChecked {get;set;}
}
try to add bool property(in this case IsChecked) for state of Checkbox.
And after this,in your GetView method write something likes this:
holder.mChecked.Checked = MyList [position].#YourBoolProperty#;
Btw i just write that on the fly.
Also,if something isn't clear for you, try to check this or this.
Hope that helps!