checkBox.setTag(new Integer(position)); //we tag every checkbox we create with the row number for later

 checkBox.setOnCheckedChangeListener(this); //define the listener (we will use this class but could be another)

  public void onCheckedChanged(CompoundButton cb, boolean isChecked) {
  //first we need to work out the row selected - we can do this as we have already tagged the CheckBox
  Integer posSelected = (Integer)cb.getTag();
  
  //We can now get the associated JSONObject (we might want to persist some data here..)
  JSONObject checked = getItem(posSelected);
  //persistChangeToDb(checked);
  
  //now we will retrieve the current row selected so we can change the appearance
  View row = (View) cb.getParent();
  
  //once we have the row, we are going to change the TextView field as strikethrough (or not) if it is checked
  TextView descrip = (TextView)row.findViewById(R.id.item_description);
  if (isChecked){
   descrip.setPaintFlags(descrip.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);
  }
  else{
   descrip.setPaintFlags(Constants.CLEAR_FORMATTING_TEXTVIEW); 
  }
 }

public class ShoppingListItemsAdapter extends ArrayAdapter implements OnCheckedChangeListener {
 
 public ShoppingListItemsAdapter(Activity activity, List shoppingLists) {
  super(activity, 0, shoppingLists);
 }
 
 
 @Override
 public View getView(int position, View convertView, ViewGroup parent) {

  Activity activity = (Activity) getContext();
  LayoutInflater inflater = activity.getLayoutInflater();

  // Inflate the views from XML
  View rowView = inflater.inflate(R.layout.shopping_list_item_view, null);
  JSONObject jsonCurrentRow = getItem(position);


  //////////////////////////////////////////////////////////////////////////////////////////////////////
  //The next section we update at runtime the text - as provided by the JSON being passed in
  ////////////////////////////////////////////////////////////////////////////////////////////////////
  
  // Set the text on the TextView
  TextView textView = (TextView) rowView.findViewById(R.id.item_description);
  
  //initialise the checkbox
  CheckBox checkBox = (CheckBox)rowView.findViewById(R.id.boughtCheck);
  checkBox.setFocusable(false);  //this is so the onLongClick on the row still works!
  checkBox.setTag(new Integer(position)); //we tag every checkbox we create with the row number for later
  checkBox.setOnCheckedChangeListener(this); //define the listener (we will use this class but could be another)
  
  
  try {
   //populating the row with data from the JSONObject
   String title = (String)jsonCurrentRow.get("title");
   textView.setText(title);
  } catch (JSONException e) {
   textView.setText("JSON Exception");
  }
  return rowView;
 }


 
 /**
  * This method is our checkbox change listener - this is where
  * we handle the changes in the checkbox state
  */
 @Override
 public void onCheckedChanged(CompoundButton cb, boolean isChecked) {
  //first we need to work out the row selected - we can do this as we have already tagged the CheckBox
  Integer posSelected = (Integer)cb.getTag();
  
  //We can now get the associated JSONObject (we might want to persist some data here..)
  JSONObject checked = getItem(posSelected);
  //persistChangeToDb(checked);
  
  //now we will retrieve the current row selected so we can change the appearance
  View row = (View) cb.getParent();
  
  //once we have the row, we are going to change the TextView field as strikethrough (or not) if it is checked
  TextView descrip = (TextView)row.findViewById(R.id.item_description);
  if (isChecked){
   descrip.setPaintFlags(descrip.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);
  }
  else{
   descrip.setPaintFlags(Constants.CLEAR_FORMATTING_TEXTVIEW); //this is a bit of a hack! to remove strike through the normal setting is 257 so I created a constant for this, you could just pass the int literal 257 in here to clear formatting
  }
 }
}