Вы можете скопировать и вставить полный код ниже
Вы можете снова использовать set futureBanjir и вызвать setState
onRefresh: () async {
futureBanjir = fetchBanjir();
setState(() {});
_refreshController.refreshCompleted();
},
рабочая демонстрация
полный код
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_spinkit/flutter_spinkit.dart';
import 'package:http/http.dart' as http;
import 'package:pull_to_refresh/pull_to_refresh.dart';
import 'dart:convert';
class RefreshScrollBehavior extends ScrollBehavior {
@override
Widget buildViewportChrome(
BuildContext context, Widget child, AxisDirection axisDirection) {
// When modifying this function, consider modifying the implementation in
// _MaterialScrollBehavior as well.
switch (getPlatform(context)) {
case TargetPlatform.iOS:
return child;
case TargetPlatform.macOS:
case TargetPlatform.android:
return GlowingOverscrollIndicator(
child: child,
// this will disable top Bouncing OverScroll Indicator showing in Android
showLeading: true, //顶部水波纹是否展示
showTrailing: true, //底部水波纹是否展示
axisDirection: axisDirection,
notificationPredicate: (notification) {
if (notification.depth == 0) {
// 越界了拖动触发overScroll的话就没必要展示水波纹
if (notification.metrics.outOfRange) {
return false;
}
return true;
}
return false;
},
color: Theme.of(context).primaryColor,
);
case TargetPlatform.fuchsia:
}
return null;
}
}
Banjir banjirFromJson(String str) => Banjir.fromJson(json.decode(str));
String banjirToJson(Banjir data) => json.encode(data.toJson());
class Banjir {
Banjir({
this.data,
});
List<Datum> data;
factory Banjir.fromJson(Map<String, dynamic> json) => Banjir(
data: List<Datum>.from(json["data"].map((x) => Datum.fromJson(x))),
);
Map<String, dynamic> toJson() => {
"data": List<dynamic>.from(data.map((x) => x.toJson())),
};
}
class Datum {
Datum({
this.tanggal,
this.jam,
this.ketinggian,
});
int tanggal;
int jam;
String ketinggian;
factory Datum.fromJson(Map<String, dynamic> json) => Datum(
tanggal: json["tanggal"],
jam: json["jam"],
ketinggian: json["ketinggian"],
);
Map<String, dynamic> toJson() => {
"tanggal": tanggal,
"jam": jam,
"ketinggian": ketinggian,
};
}
class StatisticPage extends StatefulWidget {
@override
_StatisticPageState createState() => _StatisticPageState();
}
class _StatisticPageState extends State<StatisticPage> {
Future<Banjir> futureBanjir;
RefreshController _refreshController =
RefreshController(initialRefresh: false);
List<Datum> dataList = [];
@override
void initState() {
super.initState();
futureBanjir = fetchBanjir();
}
Future<Banjir> fetchBanjir() async {
//final response = await http.get(RestAPI.BASE_URL + "/last");
print("fetchBanjir");
dataList.add(Datum(tanggal: 1, jam: 2, ketinggian: "test"));
print(dataList.length);
return Future.value(Banjir(data: dataList));
}
//ProgressDialog pr;
@override
Widget build(BuildContext context) {
return SmartRefresher(
header: WaterDropHeader(),
controller: _refreshController,
enablePullDown: true,
enablePullUp: true,
onRefresh: () async {
futureBanjir = fetchBanjir();
setState(() {});
_refreshController.refreshCompleted();
},
child: Column(
children: [
Text("test"),
Expanded(
child: FutureBuilder<Banjir>(
future: futureBanjir,
builder: (context, snapshot) {
switch (snapshot.connectionState) {
case ConnectionState.none:
return Text('none');
case ConnectionState.waiting:
return Center(child: CircularProgressIndicator());
case ConnectionState.active:
return Text('');
case ConnectionState.done:
if (snapshot.hasError) {
return Text(
'${snapshot.error}',
style: TextStyle(color: Colors.red),
);
} else {
return ListView.builder(
itemCount: snapshot.data.data.length,
itemBuilder: (context, index) {
return Card(
elevation: 6.0,
child: Padding(
padding: const EdgeInsets.only(
top: 6.0,
bottom: 6.0,
left: 8.0,
right: 8.0),
child: Row(
crossAxisAlignment:
CrossAxisAlignment.start,
children: <Widget>[
Text(snapshot.data.data[index].jam
.toString()),
Spacer(),
Text(snapshot
.data.data[index].ketinggian),
],
),
));
});
}
}
}),
),
],
));
}
}
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return RefreshConfiguration(
footerTriggerDistance: 1.0,
dragSpeedRatio: 0.91,
headerBuilder: () => MaterialClassicHeader(),
footerBuilder: () => ClassicFooter(),
enableLoadingWhenNoData: false,
shouldFooterFollowWhenNotFull: (state) {
// If you want load more with noMoreData state ,may be you should return false
return false;
},
autoLoad: true,
child: MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
builder: (context, child) {
return ScrollConfiguration(
child: child,
behavior: RefreshScrollBehavior(),
);
},
home: MyHomePage(title: 'Flutter Demo Home Page'),
),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int _counter = 0;
void _incrementCounter() {
setState(() {
_counter++;
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: StatisticPage(),
floatingActionButton: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: Icon(Icons.add),
),
);
}
}