通过json填充expandablelistview

// 1. 解析JSON数据
String jsonData = "{...}"; // JSON数据字符串
JSONObject jsonObject = new JSONObject(jsonData);
JSONArray parentArray = jsonObject.getJSONArray("parents");

// 2. 构建数据模型
List<ParentItem> parentItems = new ArrayList<>();
for (int i = 0; i < parentArray.length(); i++) {
    JSONObject parentObject = parentArray.getJSONObject(i);
    String parentTitle = parentObject.getString("title");
    JSONArray childArray = parentObject.getJSONArray("children");

    List<ChildItem> childItems = new ArrayList<>();
    for (int j = 0; j < childArray.length(); j++) {
        JSONObject childObject = childArray.getJSONObject(j);
        String childTitle = childObject.getString("title");
        // 解析其他子项数据

        ChildItem childItem = new ChildItem(childTitle);
        childItems.add(childItem);
    }

    ParentItem parentItem = new ParentItem(parentTitle, childItems);
    parentItems.add(parentItem);
}

// 3. 创建适配器
ExpandableListAdapter adapter = new ExpandableListAdapter(context, parentItems);

// 4. 设置适配器
ExpandableListView expandableListView = findViewById(R.id.expandableListView);
expandableListView.setAdapter(adapter);