本文介绍了Flutter 实现下拉刷新上拉加载的示例代码，分享给大家，具体如下：

效果图

使用方法

添加依赖

dependencies: pull_to_refresh: ^1.5.7

导入包

import 'package:pull_to_refresh/pull_to_refresh.dart';

页面代码样例

class _MyHomePageState extends State<MyHomePage> { List<String> items = ["1", "2", "3", "4", "5", "6", "7", "8"]; RefreshController _refreshController = RefreshController(initialRefresh: false); void _onRefresh() async { // monitor network fetch await Future.delayed(Duration(milliseconds: 1000)); // if failed,use refreshFailed() _refreshController.refreshCompleted(); } void _onLoading() async { // monitor network fetch await Future.delayed(Duration(milliseconds: 1000)); // if failed,use loadFailed(),if no data return,use LoadNodata() items.add((items.length + 1).toString()); if (mounted) setState(() {}); _refreshController.loadComplete(); } @override Widget build(BuildContext context) { return Scaffold( body: SmartRefresher( enablePullDown: true, enablePullUp: true, header: WaterDropHeader(), footer: CustomFooter( builder: (BuildContext context, LoadStatus mode) { Widget body; if (mode == LoadStatus.idle) { body = Text("pull up load"); } else if (mode == LoadStatus.loading) { body = CircularProgressIndicator(); } else if (mode == LoadStatus.failed) { body = Text("Load Failed!Click retry!"); } else if (mode == LoadStatus.canLoading) { body = Text("release to load more"); } else { body = Text("No more Data"); } return Container( height: 55.0, child: Center(child: body), ); }, ), controller: _refreshController, onRefresh: _onRefresh, onLoading: _onLoading, child: ListView.builder( itemBuilder: (c, i) => Card(child: Center(child: Text(items[i]))), itemExtent: 100.0, itemCount: items.length, ), ), ); }}

完整源代码

https://gitee.com/cxyzy1/flutter_pulldown_refresh

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。