Android : Arraylist override values issue?

I have an object of Order Items.it contains three values 1.item Name 2.Item Price 3.No of Items

I have a spinner, i am add this object on item selected. When I add this object and select again an other item it will also add into list not override. My code is below

    private OnItemSelectedListener itemSelectListener = new OnItemSelectedListener() {


    @Override
    public void onItemSelected(AdapterView<?> arg0, View arg1,int arg2, long arg3) {
        // TODO Auto-generated method stub


        System.out.println("parent Tag:"+arg0.getTag());
        TextView itemName = (TextView)findViewById(Integer.parseInt(arg0.getTag().toString()));
        System.out.println("Item Name:" +itemName.getText().toString());
        System.out.println("Item Price:" +itemName.getTag().toString());
        System.out.println("Item QTY:" +arg0.getItemAtPosition(arg2).toString());
        orderItems = new OrderItems();          
        if(!"".equals(arg0.getItemAtPosition(arg2).toString())){
            orderItems.itemName = itemName.getText().toString();
            orderItems.itemPrice = itemName.getTag().toString();
            orderItems.noOfItems = Integer.parseInt(arg0.getItemAtPosition(arg2).toString());
            //if(itemsArray)
            itemsArray.additem(orderItems);
        }

    }

    @Override
    public void onNothingSelected(AdapterView<?> arg0) {
        // TODO Auto-generated method stub

    }
};

can any body help me in this? What i am missing here?