@Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder = null;
        if (convertView == null) {
            LayoutInflater inflater = (LayoutInflater) context
                    .getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
            convertView = inflater.inflate(R.layout.product_list_item, null);
            holder = new ViewHolder();
            holder.deviceName = (TextView) convertView
                    .findViewById(R.id.txt_pc_name);
            holder.deviceIp = (TextView) convertView
                    .findViewById(R.id.txt_pdt_desc);
            holder.devicePort = (TextView) convertView
                    .findViewById(R.id.txt_pdt_price);
            holder.favoriteImg = (ImageView) convertView
                    .findViewById(R.id.imgbtn_favorite);

            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }
        Devices device = (Devices) getItem(position);
        holder.deviceName.setText(device.getName());
        holder.deviceIp.setText(device.getIpOnline());
        holder.devicePort.setText(device.getPortOnline() + "");


        return convertView;
    }