网站seo站外优化,wordpress site,购物系统论文,做集群网站效果如下#xff1a; flutter实现上拉加载下拉刷新 使用到的库是easy_refresh
安装请查看官网
接口用的是提供的接口https://reqres.in/
请求接口用到的库是dio
下面主要是介绍如何使用easy_refresh实现上拉加载数据#xff0c;详细学习其它例子请查看easy_refresh
main…效果如下 flutter实现上拉加载下拉刷新 使用到的库是easy_refresh
安装请查看官网
接口用的是提供的接口https://reqres.in/
请求接口用到的库是dio
下面主要是介绍如何使用easy_refresh实现上拉加载数据详细学习其它例子请查看easy_refresh
main.dart全部代码如下
import package:flutter/material.dart;
import package:easy_refresh/easy_refresh.dart;
import package:dio/dio.dart as MyDio;void main() runApp(const MyApp());class MyApp extends StatelessWidget {const MyApp({Key? key}) : super(key: key);overrideWidget build(BuildContext context) {return const MaterialApp(title: EasyRefresh,home: HomePage(),);}
}class HomePage extends StatefulWidget {const HomePage({Key? key}) : super(key: key);overrideStateHomePage createState() _HomePageState();
}class _HomePageState extends StateHomePage {int _page 1;ListUserData dataList [];late EasyRefreshController _controller;overridevoid initState() {super.initState();_controller EasyRefreshController(controlFinishRefresh: true,controlFinishLoad: true,);setState(() {dataList [];_page 1;});initListData();}overridevoid dispose() {_controller.dispose();super.dispose();}FutureApiResponse _fetchListData(int page) async {MyDio.Dio dio MyDio.Dio();MyDio.Response response await dio.get(https://reqres.in/api/users, queryParameters: {page: page,});ApiResponse data ApiResponse.fromJson(response.data);return data;}void initListData() async {final resData await _fetchListData(_page);if (resData.data.isNotEmpty) {setState(() {dataList dataList..addAll(resData.data);_page _page 1;});_controller.finishRefresh();_controller.resetFooter();initListData();}}overrideWidget build(BuildContext context) {return Scaffold(appBar: AppBar(title: const Text(EasyRefresh),),body: EasyRefresh(controller: _controller,header: const ClassicHeader(armedText: 下拉加载更多,readyText: 正在加载中...,showMessage: false,processedText: 加载完成,processingText: 刷新中...,textStyle: TextStyle(color: Color(0xFFFF2B2B))),footer: const ClassicFooter(noMoreText: 没有更多数据了,noMoreIcon: Icon(Icons.mood_rounded),showMessage: false,processingText: 正在加载中...,textStyle: TextStyle(color: Color(0xFF846FFD))),onRefresh: () async {setState(() {dataList [];_page 1;});initListData();},onLoad: () async {final resData await _fetchListData(_page);setState(() {dataList dataList..addAll(resData.data);_page _page 1;});_controller.finishLoad(resData.data.isEmpty? IndicatorResult.noMore: IndicatorResult.success);// _fetchListData(_page);},child: ListView.builder(itemBuilder: (context, index) {return Card(child: Container(alignment: Alignment.center,height: 80,// ignore: unnecessary_string_interpolationschild: Text(${dataList[index].firstName}),),);},itemCount: dataList.length,),),);}
}class ApiResponse {final int page;final int perPage;final int total;final int totalPages;final ListUserData data;final Support support;ApiResponse({required this.page,required this.perPage,required this.total,required this.totalPages,required this.data,required this.support});factory ApiResponse.fromJson(MapString, dynamic json) {var list json[data] as List;ListUserData dataList list.map((i) UserData.fromJson(i)).toList();return ApiResponse(page: json[page],perPage: json[per_page],total: json[total],totalPages: json[total_pages],data: dataList,support: Support.fromJson(json[support]),);}
}class UserData {final int id;final String email;final String firstName;final String lastName;final String avatar;UserData({required this.id,required this.email,required this.firstName,required this.lastName,required this.avatar});factory UserData.fromJson(MapString, dynamic json) {return UserData(id: json[id],email: json[email],firstName: json[first_name],lastName: json[last_name],avatar: json[avatar],);}
}class Support {final String url;final String text;Support({required this.url, required this.text});factory Support.fromJson(MapString, dynamic json) {return Support(url: json[url],text: json[text],);}
}
