Android：实现仿 美团/淘宝 多级分类菜单效果

本例要实现的是诸如美团/淘宝/百度糯米 多级分类菜单效果。当分类数量非常多时可以考虑采用两级分类，而诸如美团这种表现方式是一个不错的选择。

首先上效果图：

主要代码：

1. PopupWindow初始化过程：

popupWindow = new PopupWindow(this);
        View view = LayoutInflater.from(this).inflate(R.layout.popup_layout, null);
        leftLV = (ListView) view.findViewById(R.id.pop_listview_left);
        rightLV = (ListView) view.findViewById(R.id.pop_listview_right);

        popupWindow.setContentView(view);
        popupWindow.setBackgroundDrawable(new PaintDrawable());
        popupWindow.setFocusable(true);

        popupWindow.setHeight(ScreenUtils.getScreenH(this) * 2 / 3);
        popupWindow.setWidth(ScreenUtils.getScreenW(this));

        popupWindow.setOnDismissListener(new PopupWindow.OnDismissListener() {
            @Override
            public void onDismiss() {
                darkView.startAnimation(animOut);
                darkView.setVisibility(View.GONE);

                leftLV.setSelection(0);
                rightLV.setSelection(0);
            }
        });

2.左侧菜单点击事件：

//左侧ListView点击事件
        leftLV.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView parent, View view, int position, long id) {
                //二级数据
                List list2 = firstList.get(position).getSecondList();
                //如果没有二级类，则直接跳转
                if (list2 == null || list2.size() == 0) {
                    popupWindow.dismiss();

                    int firstId = firstList.get(position).getId();
                    String selectedName = firstList.get(position).getName();
                    handleResult(firstId, -1, selectedName);
                    return;
                }

                FirstClassAdapter adapter = (FirstClassAdapter) (parent.getAdapter());
                //如果上次点击的就是这一个item，则不进行任何操作
                if (adapter.getSelectedPosition() == position){
                    return;
                }

                //根据左侧一级分类选中情况，更新背景色
                adapter.setSelectedPosition(position);
                adapter.notifyDataSetChanged();

                //显示右侧二级分类
                updateSecondListView(list2, secondAdapter);
            }
        });

3. 右侧菜单点击事件：

//右侧ListView点击事件
        rightLV.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView parent, View view, int position, long id) {
                //关闭popupWindow，显示用户选择的分类
                popupWindow.dismiss();

                int firstPosition = firstAdapter.getSelectedPosition();
                int firstId = firstList.get(firstPosition).getId();
                int secondId = firstList.get(firstPosition).getSecondList().get(position).getId();
                String selectedName = firstList.get(firstPosition).getSecondList().get(position)
                        .getName();
                handleResult(firstId, secondId, selectedName);
            }
        });

4.顶部标签点击事件（即显示/隐藏 分类菜单）

 if (popupWindow.isShowing()) {
            popupWindow.dismiss();
        } else {
            popupWindow.showAsDropDown(findViewById(R.id.main_div_line));
            popupWindow.setAnimationStyle(-1);
            //背景变暗
            darkView.startAnimation(animIn);
            darkView.setVisibility(View.VISIBLE);
        }

5.根据左侧点击，刷新右侧ListView

//刷新右侧ListView
    private void updateSecondListView(List list2,
                                      SecondClassAdapter secondAdapter) {
        secondList.clear();
        secondList.addAll(list2);
        secondAdapter.notifyDataSetChanged();
    }

源码下载（免积分哦）：

http://download.csdn.net/detail/books1958/7992863