{"id":83,"date":"2025-06-23T10:47:00","date_gmt":"2025-06-23T02:47:00","guid":{"rendered":"https:\/\/www.bqmz001.top\/?p=83"},"modified":"2025-06-23T10:47:00","modified_gmt":"2025-06-23T02:47:00","slug":"flutter-%e8%ae%a9%e6%95%b0%e6%8d%ae%e5%8f%98%e6%88%90%e5%88%97%e8%a1%a8","status":"publish","type":"post","link":"https:\/\/www.bqmz001.top\/index.php\/2025\/06\/23\/flutter-%e8%ae%a9%e6%95%b0%e6%8d%ae%e5%8f%98%e6%88%90%e5%88%97%e8%a1%a8\/","title":{"rendered":"flutter \u8ba9\u6570\u636e\u53d8\u6210\u5217\u8868~"},"content":{"rendered":"

1\u3001\u9996\u5148\u5c06json\u53d8\u6210\u5b9e\u4f53\u65b9\u4fbf\u8c03\u7528<\/h2>\n

contact_bean.dart<\/h5>\n
class ContactBean {\n  int? id;\n  String? firstName;\n  String? lastName;\n  String? phoneNumber;\n  int? age;\n  int? sex;\n  String? address;\n\n  ContactBean(\n      {this.id,\n        this.firstName,\n        this.lastName,\n        this.phoneNumber,\n        this.age,\n        this.sex,\n        this.address});\n\n  ContactBean.fromJson(Map<String, dynamic> json) {\n    id = json['id'];\n    firstName = json['firstName'];\n    lastName = json['lastName'];\n    phoneNumber = json['phoneNumber'];\n    age = json['age'];\n    sex = json['sex'];\n    address = json['address'];\n  }\n\n  Map<String, dynamic> toJson() {\n    final Map<String, dynamic> data = new Map<String, dynamic>();\n    data['id'] = this.id;\n    data['firstName'] = this.firstName;\n    data['lastName'] = this.lastName;\n    data['phoneNumber'] = this.phoneNumber;\n    data['age'] = this.age;\n    data['sex'] = this.sex;\n    data['address'] = this.address;\n    return data;\n  }\n}\n<\/code><\/pre>\n
2\u3001\u4fee\u6539\u4e00\u4e0bmain_provider.dart\u8ba9\u8fd4\u56de\u6765\u7684json\u53d8\u6210\u5b9e\u4f53<\/h2>\n
\u5148\u8d34\u5b8c\u6574\u4ee3\u7801\uff1a<\/p>\n
main_provider.dart<\/h5>\n
import 'dart:convert';\n\nimport 'package:day03\/bean\/base_bean.dart';\nimport 'package:day03\/bean\/contact_bean.dart';\nimport 'package:day03\/dio_util.dart';\nimport 'package:dio\/dio.dart';\nimport 'package:flutter\/cupertino.dart';\n\nclass MainProvider with ChangeNotifier {\n  String _text = '';\n\n  String get text => _text;\n\n  List<ContactBean> _dataList = [];\n  List<ContactBean> get dataList => _dataList;\n\n  void getList() async {\n    await DioUtil.getInstance().get(\n      "http:\/\/192.168.5.116:20080\/contact\/list",\n      null,\n      () {\n        _text = "loading";\n        notifyListeners();\n      },\n      (data) {\n        BaseBean bean = BaseBean.fromJson(data);\n        _dataList=List.from(bean.data.map((e) => ContactBean.fromJson(e)));\n        notifyListeners();\n      },\n      (reason) {\n        _text = reason;\n        notifyListeners();\n      },\n    );\n  }\n\n  void addContact() async {\n    DioUtil.getInstance().addHeader("token", "123456789");\n    await DioUtil.getInstance().post(\n      "http:\/\/192.168.5.116:20080\/contact\/add",\n      {\n        'firstName': '\u738b',\n        'lastName': '\u516d',\n        'phoneNumber': '13456789010',\n        'age': '22',\n        'sex': 1,\n        'address': '\u5c71\u897f\u7701\u664b\u57ce\u5e02',\n      },\n      () {\n        _text = "loading";\n        notifyListeners();\n      },\n      (data) {\n        _text = '\u6dfb\u52a0\u6210\u529f';\n        notifyListeners();\n      },\n      (reason) {\n        _text = reason;\n        notifyListeners();\n      },\n    );\n  }\n}\n<\/code><\/pre>\n
\n
\u9996\u5148\u6dfb\u52a0\u4e86\u4e2adataList\u7684\u53d8\u91cf<\/p>\n
  List<ContactBean> _dataList = []; \/\/\u79c1\u6709\u53d8\u91cf\n  List<ContactBean> get dataList => _dataList; \/\/\u5bf9\u5916\u5f15\u7528\u53ea\u8bfb\n<\/code><\/pre>\n
\u7136\u540e\u5728getList()\u65b9\u6cd5\u91cc\u5c06\u539f\u6765\u7684\uff1a<\/p>\n
_text = bean.data.toString();\n<\/code><\/pre>\n
\u6362\u4e3a\uff1a<\/p>\n
 _dataList=List.from(bean.data.map((e) => ContactBean.fromJson(e)));\n<\/code><\/pre>\n
\u5c06\u6570\u636e\u66f4\u65b0\u4ece\u66f4\u65b0text\u6587\u5b57\u53d8\u6210dataList\u5217\u8868\uff0c\u7136\u540e\u4f7f\u7528map\u65b9\u6cd5\u904d\u5386\u51faContactBean<\/p>\n
\u597d\u4e86\uff0c\u6570\u636e\u600e\u4e48\u6765\u89e3\u51b3\u4e86\uff0c\u63a5\u4e0b\u6765\u6539UI<\/p>\n
4\u3001\u6539UI\uff01<\/h2>\n
main.dart<\/h5>\n
import 'package:day03\/main_provider.dart';\nimport 'package:flutter\/material.dart';\nimport 'package:provider\/provider.dart';\n\nvoid main() {\n  runApp(\n    MultiProvider(\n      providers: [ChangeNotifierProvider(create: (context) => MainProvider())],\n      child: MyApp(),\n    ),\n  );\n}\n\nclass MyApp extends StatelessWidget {\n  const MyApp({super.key});\n\n  \/\/ This widget is the root of your application.\n  @override\n  Widget build(BuildContext context) {\n    return MaterialApp(\n      title: 'Flutter Demo',\n      theme: ThemeData(\n        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),\n      ),\n      home: const MyHomePage(title: 'Flutter Demo Home Page'),\n    );\n  }\n}\n\nclass MyHomePage extends StatelessWidget {\n  const MyHomePage({super.key, required this.title});\n\n  final String title;\n\n  @override\n  Widget build(BuildContext context) {\n    final provider = Provider.of<MainProvider>(context);\n\n    return Scaffold(\n      appBar: AppBar(\n        backgroundColor: Theme.of(context).colorScheme.inversePrimary,\n        title: Text(title),\n      ),\n      body: Center(\n        child: Column(\n          mainAxisAlignment: MainAxisAlignment.center,\n          children: <Widget>[\n            Text(provider.text),\n            ElevatedButton(\n              onPressed: provider.getList,\n              child: const Text('\u8bf7\u6c42\u6570\u636e'),\n            ),\n            ElevatedButton(\n              onPressed: () => provider.addContact(),\n              child: const Text('\u6dfb\u52a0\u4e00\u4e2a\u8054\u7cfb\u4eba'),\n            ),\n            Expanded(\n              child: ListView.builder(\n                itemCount: provider.dataList.length,\n                itemBuilder: (context, index) {\n                  return ListTile(\n                    title: Text('${provider.dataList[index].firstName} ${provider.dataList[index].lastName}'),\n                    subtitle: Text('${provider.dataList[index].phoneNumber}'),\n                  );\n                },\n              ),\n            )\n          ],\n        ),\n      ),\n    );\n  }\n}\n<\/code><\/pre>\n
\n
\u4ecd\u7136\u662fStatelessWidget\uff0c\u4e0d\u8fc7\u540e\u9762\u7528Expanded\u6491\u5f00\u5269\u4e0b\u7684\u5730\u65b9\uff0c\u5f80\u91cc\u9762\u653e\u4e86\u4e00\u4e2aListView\uff0c\u4f7f\u7528ListView.Builder\u6784\u5efa\u3002
itemCount\u6307List\u7684\u8ba1\u6570\uff1bitemBuilder\u5185\u653e\u7f6eListView item\u7ec4\u4ef6
\u4e3a\u6f14\u793a\u65b9\u4fbf\u5c31\u8fd4\u56de\u4e00\u4e2aListTile\u7528\u4e8e\u5c55\u793a\u6570\u636e\uff0c\u76f4\u63a5provider.dataList[index]\u5f15\u7528\u5217\u8868\u91cc\u7684ContactBean\u5bf9\u8c61<\/p>\n","protected":false},"excerpt":{"rendered":"
1\u3001\u9996\u5148\u5c06json\u53d8\u6210\u5b9e\u4f53\u65b9\u4fbf\u8c03\u7528 contact_bean.dart class ContactBean { […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-83","post","type-post","status-publish","format-standard","hentry","category-androidflutter"],"_links":{"self":[{"href":"https:\/\/www.bqmz001.top\/index.php\/wp-json\/wp\/v2\/posts\/83","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bqmz001.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bqmz001.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bqmz001.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bqmz001.top\/index.php\/wp-json\/wp\/v2\/comments?post=83"}],"version-history":[{"count":15,"href":"https:\/\/www.bqmz001.top\/index.php\/wp-json\/wp\/v2\/posts\/83\/revisions"}],"predecessor-version":[{"id":98,"href":"https:\/\/www.bqmz001.top\/index.php\/wp-json\/wp\/v2\/posts\/83\/revisions\/98"}],"wp:attachment":[{"href":"https:\/\/www.bqmz001.top\/index.php\/wp-json\/wp\/v2\/media?parent=83"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bqmz001.top\/index.php\/wp-json\/wp\/v2\/categories?post=83"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bqmz001.top\/index.php\/wp-json\/wp\/v2\/tags?post=83"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}