Android : Base Adapter is not working

Hi I am working on BaseAdapter , but always my last item is showing .

          public View getView(int position, View convertView, ViewGroup parent){
    SearchViewHolder orderViewHolder = null;
    int type = getItemViewType(position);
    if (convertView == null) {
        orderViewHolder = new SearchViewHolder();

            convertView = inflater.inflate(R.layout.order_list_row, null);
            orderViewHolder.setproductname((TextView) convertView
                    .findViewById(R.id.orderTitle));


        }

        convertView.setTag(orderViewHolder);
                } else {
        orderViewHolder = (SearchViewHolder)convertView.getTag();
    } for (int i = 0 ; i<msearchproductname.size();i++){
        System.out.println("@@ value of productname !!!!!!!!!!!!!!!!!!!!!!!!!!!:"+msearchproductname.get(i));
        orderViewHolder.getproductname().setText(""+msearchproductname.get(i));  
    }

    return convertView;}

Even output of

     System.out.println("@@ value of productname !!!!!!!!!!!!!!!!!!!!!!!!!!!:"+msearchproductname.get(i));

is same as we want. What is happening wrong here. In textView it is showing always last item . Please help me.Thanks in advance to all.