Android 仿京东、拼多多商品分类页的示例代码

menuAdapter = new MenuAdapter(this, menuList);
lv_menu.setAdapter(menuAdapter);

 homeAdapter = new HomeAdapter(this, homeList);
 lv_home.setAdapter(homeAdapter);

 @Override
  public View getView(int position, View convertView, ViewGroup parent) {
    CategoryBean.DataBean dataBean = foodDatas.get(position);
    List<CategoryBean.DataBean.DataListBean> dataList = dataBean.getDataList();
    ViewHold viewHold = null;
    if (convertView == null) {
      convertView = View.inflate(context, R.layout.item_home, null);
      viewHold = new ViewHold();
      viewHold.gridView = (GridViewForScrollView) convertView.findViewById(R.id.gridView);
      viewHold.blank = (TextView) convertView.findViewById(R.id.blank);
      convertView.setTag(viewHold);
    } else {
      viewHold = (ViewHold) convertView.getTag();
    }
    HomeItemAdapter adapter = new HomeItemAdapter(context, dataList);
    viewHold.blank.setText(dataBean.getModuleTitle());
    viewHold.gridView.setAdapter(adapter);
    return convertView;
  }

  private static class ViewHold {
    private GridViewForScrollView gridView;
    private TextView blank;
  }

 lv_menu.setOnItemClickListener(new AdapterView.OnItemClickListener() {
      @Override
      public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        menuAdapter.setSelectItem(position);
        menuAdapter.notifyDataSetInvalidated();
        tv_title.setText(menuList.get(position));
        lv_home.setSelection(showTitle.get(position));
      }
    });

lv_home.setOnScrollListener(new AbsListView.OnScrollListener() {
      private int scrollState;

      @Override
      public void onScrollStateChanged(AbsListView view, int scrollState) {
        this.scrollState = scrollState;
      }

      @Override
      public void onScroll(AbsListView view, int firstVisibleItem,
                 int visibleItemCount, int totalItemCount) {
        if (scrollState == AbsListView.OnScrollListener.SCROLL_STATE_IDLE) {
          return;
        }
        int current = showTitle.indexOf(firstVisibleItem);
        if (currentItem != current && current >= 0) {
          currentItem = current;
          tv_title.setText(menuList.get(currentItem));
          menuAdapter.setSelectItem(currentItem);
          menuAdapter.notifyDataSetInvalidated();
        }
      }
    });