flutter_easyrefresh 1.1.7

A widget provided to the flutter scroll component drop-down refresh and pull up load.

example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:flutter_easyrefresh/easy_refresh.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      // App名字
      title: 'EasyRefresh',
      // App主题
      theme: new ThemeData(
        primarySwatch: Colors.orange,
      ),
      // 主页
      home: BasicPage(),
    );
  }
}

class BasicPage extends StatefulWidget {
  @override
  _BasicPageState createState() => _BasicPageState();
}

class _BasicPageState extends State<BasicPage> {

  List<String> addStr=["1","2","3","4","5","6","7","8","9","0"];
  List<String> str=["1","2","3","4","5","6","7","8","9","0"];
  GlobalKey<EasyRefreshState> _easyRefreshKey = new GlobalKey<EasyRefreshState>();
  GlobalKey<RefreshHeaderState> _headerKey = new GlobalKey<RefreshHeaderState>();
  GlobalKey<RefreshFooterState> _footerKey = new GlobalKey<RefreshFooterState>();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("EasyRefresh"),
      ),
      body: Center(
          child: new EasyRefresh(
            key: _easyRefreshKey,
            behavior: ScrollOverBehavior(),
            refreshHeader: ClassicsHeader(
              key: _headerKey,
              bgColor: Colors.transparent,
              textColor: Colors.black87,
              moreInfoColor: Colors.black54,
              showMore: true,
            ),
            refreshFooter: ClassicsFooter(
              key: _footerKey,
              bgColor: Colors.transparent,
              textColor: Colors.black87,
              moreInfoColor: Colors.black54,
              showMore: true,
            ),
            child: new ListView.builder(
              //ListView的Item
                itemCount: str.length,
                itemBuilder: (BuildContext context,int index){
                  return new Container(
                      height: 70.0,
                      child: Card(
                        child: new Center(
                          child: new Text(str[index],style: new TextStyle(fontSize: 18.0),),
                        ),
                      )
                  );
                }
            ),
            onRefresh: () async{
              await new Future.delayed(const Duration(seconds: 1), () {
                setState(() {
                  str.clear();
                  str.addAll(addStr);
                });
              });
            },
            loadMore: () async {
              await new Future.delayed(const Duration(seconds: 1), () {
                if (str.length < 20) {
                  setState(() {
                    str.addAll(addStr);
                  });
                }
              });
            },
          )
      ),
      persistentFooterButtons: <Widget>[
        FlatButton(onPressed: () {
          _easyRefreshKey.currentState.callRefresh();
        }, child: Text("refresh", style: TextStyle(color: Colors.black))),
        FlatButton(onPressed: () {
          _easyRefreshKey.currentState.callLoadMore();
        }, child: Text("loadMore", style: TextStyle(color: Colors.black)))
      ],// This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}