DialogFragment does not retain checkbox state on scroll

I have implemented DialogFragmentin my app where I show a list of Countries/States to the user for selection. The list is displayed properly by using the below code. But I just realized when I scroll down the checked boxes and they are not visible on the screen they don't retain check mark when I scroll up again to them. I was thinking I could use an ArrayList to hold the checked items and then use that to check/uncheck the boxes. But I may be there is some other and better way to do it in setMultiChoiceItems. Also, how would I reconcile ArrayList with setMultiChoiceItems parameter isCheckedColumn that is "Show_Ad" in my case.

I don't update the Database until the user presses OK button. So on scroll the Dialog is reusing the old cursor and setting checkboxes according to that. That is what I think is happening.

Can anyone please tell me how I should go about retaining the state of the checkboxes?
Thank you.

 NextDialogIs = "Region";
 regionsCur = database.rawQuery("SELECT distinct max(Show_Ad) as Show_Ad, State_ID as _id, State_Name, State_ID FROM State_Regions group by State_Name ORDER BY State_Name ASC ", null);

 // add a checkbox list

builder.setMultiChoiceItems(regionsCur, "Show_Ad", "State_Name",new DialogInterface.OnMultiChoiceClickListener() {
      @Override
      public void onClick(DialogInterface dialog, int which, boolean isChecked){
           // user checked or unchecked a box

            regionsCur.moveToPosition(which);
            if(isChecked) {
               regionID.add(regionsCur.getInt(1));
             }
        }
});