电脑网站在哪里找,海尔电子商务网站建设,the 了wordpress,昆明做网站建设价位实现上拉加载数据#xff0c;效果如下#xff1a; flutter滚动列表加载数据 使用的库主要是infinite_scroll_pagination ,
安装请查看官网
接口用的是https://reqres.in/提供的接口
请求接口用到的库是dio
下面主要是介绍如何使用infinite_scroll_pagination实现上拉加载…实现上拉加载数据效果如下 flutter滚动列表加载数据 使用的库主要是infinite_scroll_pagination ,
安装请查看官网
接口用的是https://reqres.in/提供的接口
请求接口用到的库是dio
下面主要是介绍如何使用infinite_scroll_pagination实现上拉加载数据详细学习其它例子请查看infinite_scroll_pagination
main.dart全部代码如下 // ignore_for_file: non_constant_identifier_names
import package:flutter/material.dart;
import package:infinite_scroll_pagination/infinite_scroll_pagination.dart;import package:dio/dio.dart as MyDio;void main() runApp(const MyApp());class MyApp extends StatelessWidget {const MyApp({super.key});overrideWidget build(BuildContext context) {return MaterialApp(title: Infinite Scroll Demo,theme: ThemeData(primarySwatch: Colors.blue,),home: const InfiniteScrollList(),);}
}class InfiniteScrollList extends StatefulWidget {const InfiniteScrollList({super.key});override// ignore: library_private_types_in_public_api_InfiniteScrollListState createState() _InfiniteScrollListState();
}class _InfiniteScrollListState extends StateInfiniteScrollList {final PagingControllerint, UserData _listController PagingController(firstPageKey: 1);overridevoid initState() {super.initState();_listController.addPageRequestListener((page) {_fetchListData(page);});}Futurevoid _fetchListData(int page) async {MyDio.Dio dio MyDio.Dio();MyDio.Response response await dio.get(https://reqres.in/api/users,queryParameters: {page: page,// stage_id: 4,// category_id: 3,});ApiResponse data ApiResponse.fromJson(response.data);if (data.data.isEmpty) {_listController.appendLastPage(data.data);} else {final nextPageKey page 1;_listController.appendPage(data.data, nextPageKey);}}overrideWidget build(BuildContext context) {return Scaffold(appBar: AppBar(title: const Text(Infinite Scroll Demo)),body: PagedListViewint, UserData(pagingController: _listController,builderDelegate: PagedChildBuilderDelegateUserData(itemBuilder: (context, item, index) ListTile(title: SizedBox(child: Text(item.firstName))),noMoreItemsIndicatorBuilder: (context) const Center(child: Padding(padding: EdgeInsets.all(20.0),child: Text(没有更多了),),),),),);}overridevoid dispose() {_listController.dispose();super.dispose();}
}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],);}
}
