@Override
 public void onItemClick(
     final AdapterView<?> adapter, final View view, final int position, final long id) {
   final DocsEntry item = docsEntries.get(position);
   switch (item.getType()) {
     case DocsEntry.COLLECTION:
       Intent intent = new Intent(QuizBrowserActivity.this, QuizBrowserActivity.class);
       intent.putExtra(QuizBrowserActivity.EXTRA_COLLECTION_ID, item.getId());
       intent.putExtra(QuizBrowserActivity.EXTRA_TITLE, item.getTitle());
       startActivity(intent);
       break;
     case DocsEntry.QUIZ:
       Intent intent2 = new Intent(this, QuizInfoActivity.class);
       intent2.putExtra(QuizInfoActivity.EXTRA_DOC_ID, item.getId());
       startActivity(intent2);
       break;
   }
 }
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
      View view = convertView;
      if (view == null) {
        LayoutInflater vi = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        view = vi.inflate(R.layout.list_item_icon, parent, false);
      }
      DocsEntry item = items.get(position);
      TextView text = (TextView) view.findViewById(R.id.title);
      text.setText(item.getTitle());
      ImageView icon = (ImageView) view.findViewById(R.id.icon);
      switch (item.getType()) {
        case DocsEntry.COLLECTION:
          icon.setImageResource(R.drawable.folder);
          break;
        case DocsEntry.QUIZ:
          icon.setImageResource(R.drawable.quiz);
          break;
      }

      return view;
    }