如何将数据设置为可扩展列表视图? [英] How to set data to Expandable List View?

问题描述

我尝试为我的应用程序添加可扩展列表视图.该列表包括标题和子列表.

I tried to add Expandable List View for my application. That list include header and sub list.

对于列表，使用网络服务加载的数据.

for the list, data loaded by using web service.

我使用了 Android 可扩展列表视图教程开发这个链接.

i used Android Expandable List View Tutorial link for develop this.

我成功加载了标题列表.但情况是，子列表包括数组列表中的所有数据.我只想加载与标题相关的内容.

i loaded header list successfully. but the case is, the sublist include all data in array list. i want to load only the things which related with the header.

例如:它显示酒店名称和所有酒店详细信息，再次显示酒店名称和所有酒店详细信息.

for an example: it display hotel name and all hotels details, again hotel name and all hotels details.

它通过网络服务成功加载了数据.我只想处理 arrayList.

It successfully load the data through the web service. i just want to handle the arrayList.

这是我使用的代码.

    public void ListDrwaer() {

        listDataHeader = new ArrayList<String>();
        listDataChild = new HashMap<String, List<String>>();
        List<String> restData = new ArrayList<String>();

        try {
            JSONObject jsonResponse = new JSONObject(strJson1);
            JSONArray jsonMainNode = jsonResponse.optJSONArray("restaurants");

            for (int i = 0; i < jsonMainNode.length(); i++) {

                JSONObject jsonChildNode = jsonMainNode.getJSONObject(i);
                String restName = jsonChildNode.optString("name");
                String address = jsonChildNode.optString("address");
                String mobile = jsonChildNode.optString("mobile");
                String direction = jsonChildNode.optString("direction");
                String bestTime = jsonChildNode.optString("bestTime");
                String food = jsonChildNode.optString("food");
                String dress = jsonChildNode.optString("dress");
                String priceRange = jsonChildNode.optString("priceRange");

                listDataHeader.add(restName);

                restData.add(address);
                restData.add(mobile);
                restData.add(direction);
                restData.add(bestTime);
                restData.add(food);
                restData.add(dress);
                restData.add(priceRange);

                listDataChild.put(listDataHeader.get(i), restData);
            }

        } catch (JSONException e) {
            Toast.makeText(getApplicationContext(), "Error..." + e.toString(),
                    Toast.LENGTH_LONG).show();
        }

        listAdapter = new ExpandableListAdapter(this, listDataHeader, listDataChild);

        expListView.setAdapter(listAdapter);

    }

有人可以帮我吗?

推荐答案

你需要为你的 for 循环中的每一项创建一个新的 restData 否则它会保留对同一个 for 的引用每个项目:

You need to create a new restData for each item in your for loop otherwise it'll keep the reference to the same one for each item:

public void ListDrwaer() {

    listDataHeader = new ArrayList<String>();
    listDataChild = new HashMap<String, List<String>>();

    try {
        JSONObject jsonResponse = new JSONObject(strJson1);
        JSONArray jsonMainNode = jsonResponse.optJSONArray("restaurants");

        for (int i = 0; i < jsonMainNode.length(); i++) {
            JSONObject jsonChildNode = jsonMainNode.getJSONObject(i);
            String restName = jsonChildNode.optString("name");
            String address = jsonChildNode.optString("address");
            String mobile = jsonChildNode.optString("mobile");
            String direction = jsonChildNode.optString("direction");
            String bestTime = jsonChildNode.optString("bestTime");
            String food = jsonChildNode.optString("food");
            String dress = jsonChildNode.optString("dress");
            String priceRange = jsonChildNode.optString("priceRange");

            List<String> restData = new ArrayList<String>();
            restData.add(address);
            restData.add(mobile);
            restData.add(direction);
            restData.add(bestTime);
            restData.add(food);
            restData.add(dress);
            restData.add(priceRange);

            listDataHeader.add(restName);
            listDataChild.put(restName, restData);
        }

    } catch (JSONException e) {
        Toast.makeText(getApplicationContext(), "Error..." + e.toString(),
                Toast.LENGTH_LONG).show();
    }

    listAdapter = new ExpandableListAdapter(this, listDataHeader, listDataChild);

    expListView.setAdapter(listAdapter);

}

这篇关于如何将数据设置为可扩展列表视图?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！