无法将数据从JSONObject结果传递到ListView

// 1. 解析JSONObject结果
JSONObject jsonObject = new JSONObject(jsonString);

// 2. 创建数据模型
public class Item {
    private String name;
    private int quantity;

    // 构造函数、getter和setter方法
}

// 3. 解析数据
List<Item> itemList = new ArrayList<>();
JSONArray jsonArray = jsonObject.getJSONArray("items");
for (int i = 0; i < jsonArray.length(); i++) {
    JSONObject itemObject = jsonArray.getJSONObject(i);
    Item item = new Item();
    item.setName(itemObject.getString("name"));
    item.setQuantity(itemObject.getInt("quantity"));
    itemList.add(item);
}

// 4. 创建适配器
public class ItemAdapter extends BaseAdapter {
    private List<Item> itemList;
    private LayoutInflater inflater;

    public ItemAdapter(Context context, List<Item> itemList) {
        this.itemList = itemList;
        inflater = LayoutInflater.from(context);
    }

    // 实现适配器的其他方法

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        if (convertView == null) {
            convertView = inflater.inflate(R.layout.list_item, parent, false);
        }

        TextView nameTextView = convertView.findViewById(R.id.nameTextView);
        TextView quantityTextView = convertView.findViewById(R.id.quantityTextView);

        Item item = itemList.get(position);
        nameTextView.setText(item.getName());
        quantityTextView.setText(String.valueOf(item.getQuantity()));

        return convertView;
    }
}

// 5. 设置适配器
ListView listView = findViewById(R.id.listView);
ItemAdapter itemAdapter = new ItemAdapter(this, itemList);
listView.setAdapter(itemAdapter);

// 6. 显示数据
itemAdapter.notifyDataSetChanged();