bn_refresh_indicator 1.4.0

A system based refresh & load component.It's very low intrusive, and easy to use, just like flutter with.Welcome to support star if it can help.

example/lib/main.dart

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:bn_refresh_indicator/bn_refresh_indicator.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        // This is the theme of your application.
        //
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or simply save your changes to "hot reload" in a Flutter IDE).
        // Notice that the counter didn't reset back to zero; the application
        // is not restarted.
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  var _counter = 10;
  var more = false;
  BnRefreshController refreshController = BnRefreshController();
  @override
  void initState() {
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    // This method is rerun every time setState is called, for instance as done
    // by the _incrementCounter method above.
    //
    // The Flutter framework has been optimized to make rerunning build methods
    // fast, so that you can just rebuild anything that needs updating rather
    // than having to individually change instances of widgets.
    return Scaffold(
        appBar: AppBar(
          // Here we take the value from the MyHomePage object that was created by
          // the App.build method, and use it to set our appbar title.
          title: Text(widget.title),
          actions: <Widget>[
            IconButton(
              icon: Icon(Icons.refresh),
              onPressed: () {
                refreshController.beginRefresh();
              },
            )
          ],
        ),
        body: BnRefreshIndicator(
          refreshController: refreshController,
          autoRefresh: false,
          nodataWidget: Text('there is no data'),
          onRefresh: () async {
            await Future.delayed(Duration(seconds: 3));
            more = !more;
            _counter = 10;
            if (mounted) {
              setState(() {});
            }
            return more;
          },
          onLoadMore: () async {
            await Future.delayed(Duration(seconds: 3));
            _counter += 10;
            if (mounted) {
              setState(() {});
            }
            return false;
          },
          child: ListView.builder(
            // physics: BouncingScrollPhysics,
            itemBuilder: (context, index) {
              return GestureDetector(
                child: Card(
                  child: Center(
                    child: Text('index -- $index'),
                  ),
                ),
                onTap: () {
                  Navigator.push(context, MaterialPageRoute(builder: (context) {
                    return MyHomePage(title: 'Second page');
                  }));
                },
              );
            },
            itemCount: _counter,
            itemExtent: 88.0,
          ),
        ) // This trailing comma makes auto-formatting nicer for build methods.
        );
  }
}