@Override
    public View getView(int position, View convertView, final ViewGroup parent) {
      final Item item = getItem(position);

      final View view;
      if (convertView != null && item.getClass().equals(convertView.getTag())) {
        view = convertView;
      } else {
        view =
            getLayoutInflater()
                .inflate(
                    item instanceof SectionItem
                        ? R.layout.catalog_manager_section_head
                        : R.layout.catalog_manager_item,
                    null);
        view.setTag(item.getClass());
      }

      if (item instanceof SectionItem) {
        ((TextView) view.findViewById(R.id.catalog_manager_section_head_title))
            .setText(((SectionItem) item).Title);
      } else /* if (item instanceof CatalogItem) */ {
        final CatalogItem catalogItem = (CatalogItem) item;

        if (myCoverManager == null) {
          view.measure(ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
          final int coverHeight = view.getMeasuredHeight();
          myCoverManager =
              new CoverManager(CatalogManagerActivity.this, coverHeight * 15 / 22, coverHeight);
          view.requestLayout();
        }

        final INetworkLink link = catalogItem.Tree.getLink();
        ((TextView) view.findViewById(R.id.catalog_manager_item_title)).setText(link.getTitle());
        ((TextView) view.findViewById(R.id.catalog_manager_item_subtitle))
            .setText(link.getSummary());

        final ImageView coverView = (ImageView) view.findViewById(R.id.catalog_manager_item_icon);
        if (!myCoverManager.trySetCoverImage(coverView, catalogItem.Tree)) {
          coverView.setImageResource(R.drawable.ic_list_library_books);
        }

        final CheckBox checkBox = (CheckBox) view.findViewById(R.id.catalog_manager_item_checkbox);
        checkBox.setChecked(catalogItem.IsChecked);
        checkBox.setOnClickListener(
            new View.OnClickListener() {
              public void onClick(View v) {
                catalogItem.IsChecked = checkBox.isChecked();
                setResultIds(catalogItem, 0);
              }
            });
      }
      return view;
    }
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
      View view = convertView;
      Holder holder = null;

      if (view == null) {
        view = View.inflate(RssfeedActivity.this, R.layout.list_item_simple, null);

        holder = new Holder();
        holder.cityTextView = (TextView) view.findViewById(R.id.item);
        view.setTag(holder);
      } else {
        holder = (Holder) view.getTag();
      }

      // Set properties
      Item item = items.get(position);
      holder.cityTextView.setText(item.getTitle());

      return view;
    }
    @Override
    public String getSectionTitleForItem(Item item) {
      String sectionTitle = "Unknown";

      return item.getHeader();
    }