概述

在HarmonyOS 5中使用CodeGenie开发查询房源小程序可以大大提高开发效率。CodeGenie是华为提供的低代码开发工具，能够帮助开发者快速构建应用界面和逻辑。

开发步骤

1. 环境准备

首先确保你已经安装了：

• DevEco Studio最新版本
• HarmonyOS SDK 5.0或更高版本
• 在DevEco中启用CodeGenie插件

2. 创建新项目

1. 打开DevEco Studio
2. 选择"Create Project"
3. 选择"Application" -> "Empty Ability"
4. 确保勾选"Enable CodeGenie"选项

3. 使用CodeGenie设计界面

主页面设计

// resources/base/profile/main_page.xml
{
  "data": {
    "searchText": "",
    "houseList": []
  },
  "ui": {
    "type": "page",
    "children": [
      {
        "type": "column",
        "padding": 20,
        "children": [
          {
            "type": "text",
            "text": "房源查询",
            "fontSize": 24,
            "fontWeight": "bold",
            "margin": { "bottom": 20 }
          },
          {
            "type": "row",
            "children": [
              {
                "type": "input",
                "placeholder": "输入城市/区域/小区",
                "flex": 1,
                "model": "searchText"
              },
              {
                "type": "button",
                "text": "搜索",
                "onclick": "searchHouses"
              }
            ]
          },
          {
            "type": "list",
            "for": "house in houseList",
            "item": {
              "type": "card",
              "margin": { "top": 10 },
              "children": [
                {
                  "type": "image",
                  "src": "$house.image",
                  "height": 180
                },
                {
                  "type": "column",
                  "padding": 10,
                  "children": [
                    {
                      "type": "text",
                      "text": "$house.title",
                      "fontSize": 18,
                      "fontWeight": "bold"
                    },
                    {
                      "type": "text",
                      "text": "$house.price + '元/月'",
                      "color": "#FF0000",
                      "margin": { "top": 5 }
                    },
                    {
                      "type": "text",
                      "text": "$house.area + '㎡ | ' + $house.rooms + '室' + $house.halls + '厅'",
                      "margin": { "top": 5 }
                    },
                    {
                      "type": "text",
                      "text": "$house.location",
                      "margin": { "top": 5 }
                    }
                  ]
                }
              ]
            }
          }
        ]
      }
    ]
  }
}

4. 添加业务逻辑

// resources/base/profile/main_page.js
export default {
  data: {
    searchText: '',
    houseList: []
  },
  
  onInit() {
    // 初始化时可以加载一些默认数据
    this.loadDefaultHouses();
  },
  
  loadDefaultHouses() {
    // 这里可以替换为实际API调用
    this.houseList = [
      {
        title: "阳光花园 3室2厅",
        price: 4500,
        area: 120,
        rooms: 3,
        halls: 2,
        location: "朝阳区阳光路88号",
        image: "common/images/house1.jpg"
      },
      {
        title: "城市公寓 1室1厅",
        price: 2800,
        area: 60,
        rooms: 1,
        halls: 1,
        location: "海淀区科技园12号",
        image: "common/images/house2.jpg"
      }
    ];
  },
  
  searchHouses() {
    if (!this.searchText.trim()) {
      this.$page.showToast("请输入搜索内容");
      return;
    }
    
    // 模拟API调用
    this.$page.showLoading("搜索中...");
    
    setTimeout(() => {
      // 实际开发中替换为真实API调用
      this.houseList = this.mockSearch(this.searchText);
      this.$page.hideLoading();
    }, 1000);
  },
  
  mockSearch(keyword) {
    // 模拟搜索逻辑
    const allHouses = [
      // 这里可以添加更多模拟数据
      ...this.houseList,
      {
        title: `${keyword}小区 2室1厅`,
        price: 3500,
        area: 85,
        rooms: 2,
        halls: 1,
        location: `${keyword}路100号`,
        image: "common/images/house3.jpg"
      }
    ];
    
    return allHouses.filter(house => 
      house.title.includes(keyword) || 
      house.location.includes(keyword)
    );
  }
}

5. 添加网络请求功能

如果需要连接真实API，可以添加网络请求：

// 在searchHouses方法中替换为真实API调用
searchHouses() {
  if (!this.searchText.trim()) {
    this.$page.showToast("请输入搜索内容");
    return;
  }
  
  this.$page.showLoading("搜索中...");
  
  const url = `https://api.example.com/houses?q=${encodeURIComponent(this.searchText)}`;
  
  fetch.fetch({
    url: url,
    success: (response) => {
      this.houseList = JSON.parse(response.data);
      this.$page.hideLoading();
    },
    fail: (error) => {
      this.$page.hideLoading();
      this.$page.showToast("搜索失败: " + error.code);
    }
  });
}

6. 添加详情页面

// resources/base/profile/detail_page.xml
{
  "data": {
    "house": {}
  },
  "ui": {
    "type": "page",
    "children": [
      {
        "type": "column",
        "padding": 20,
        "children": [
          {
            "type": "image",
            "src": "$house.image",
            "height": 240
          },
          {
            "type": "text",
            "text": "$house.title",
            "fontSize": 22,
            "fontWeight": "bold",
            "margin": { "top": 15 }
          },
          {
            "type": "text",
            "text": "$house.price + '元/月'",
            "color": "#FF0000",
            "fontSize": 20,
            "margin": { "top": 10 }
          },
          {
            "type": "divider",
            "margin": { "top": 15, "bottom": 15 }
          },
          {
            "type": "row",
            "justifyContent": "space-between",
            "children": [
              {
                "type": "text",
                "text": "面积:"
              },
              {
                "type": "text",
                "text": "$house.area + '㎡'"
              }
            ]
          },
          // 添加更多房源详情信息...
          {
            "type": "button",
            "text": "联系房东",
            "margin": { "top": 30 },
            "onclick": "contactLandlord"
          }
        ]
      }
    ]
  }
}

注意事项

1. ​​权限配置​​：如果使用网络请求，需要在config.json中添加网络权限：

   {
     "module": {
       "reqPermissions": [
         {
           "name": "ohos.permission.INTERNET"
         }
       ]
     }
   }

2. ​​数据安全​​：实际开发中应对API返回的数据进行验证和过滤

3. ​​性能优化​​：对于大量房源数据，应考虑分页加载或虚拟滚动

4. ​​本地存储​​：可以使用HarmonyOS的DataAbility或Preferences实现收藏功能

通过以上步骤，你可以在HarmonyOS 5中利用CodeGenie快速开发出一个功能完善的房源查询小程序。实际开发中可以根据需求进一步扩展功能，如地图展示、筛选排序等。