您可以在下面复制粘贴运行完整代码
使用class History和List<History>控制
向List<History>添加数据时，使用 setState ，会显示在 ListView
代码sn-p
List<History> historyList = [];
...
setState(() {
historyList.add(History(iconColor: Colors.blue, transactionAmount: "100", transactionIcon: "abc", transactionName: "Hi",transactionType: "def"));
...
class History {
Color iconColor;
String transactionName;
String transactionType;
String transactionAmount;
String transactionIcon;
History({
this.iconColor,
this.transactionName,
this.transactionType,
this.transactionAmount,
this.transactionIcon,
});
工作演示
完整代码
import 'package:flutter/material.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> {
int _counter = 0;
final List<String> entries = <String>['A', 'B', 'C'];
final List<int> colorCodes = <int>[600, 500, 100];
List<History> historyList = [];
void _incrementCounter() {
setState(() {
historyList.add(History(iconColor: Colors.blue, transactionAmount: "100", transactionIcon: "abc", transactionName: "Hi",transactionType: "def"));
// This call to setState tells the Flutter framework that something has
// changed in this State, which causes it to rerun the build method below
// so that the display can reflect the updated values. If we changed
// _counter without calling setState(), then the build method would not be
// called again, and so nothing would appear to happen.
_counter++;
});
}
@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),
),
body: ListView.builder(
padding: const EdgeInsets.all(8),
itemCount: historyList.length,
itemBuilder: (BuildContext context, int index) {
return HistoryListTile(
iconColor: historyList[index].iconColor,
onTap: () {},
transactionAmount: historyList[index].transactionAmount,
transactionIcon: historyList[index].transactionIcon,
transactionName: historyList[index].transactionName,
transactionType: historyList[index].transactionType,
);
}
),
floatingActionButton: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: Icon(Icons.add),
), // This trailing comma makes auto-formatting nicer for build methods.
);
}
}
class History {
Color iconColor;
String transactionName;
String transactionType;
String transactionAmount;
String transactionIcon;
History({
this.iconColor,
this.transactionName,
this.transactionType,
this.transactionAmount,
this.transactionIcon,
});
factory History.fromJson(Map<String, dynamic> json) => History(
iconColor: json["iconColor"],
transactionName: json["transactionName"],
transactionType: json["transactionType"],
transactionAmount: json["transactionAmount"],
transactionIcon: json["ransactionIcon"],
);
Map<String, dynamic> toJson() => {
"iconColor": iconColor,
"transactionName": transactionName,
"transactionType": transactionType,
"transactionAmount": transactionAmount,
"ransactionIcon": transactionIcon,
};
}
class HistoryListTile extends StatelessWidget {
final Color iconColor;
final String transactionName,
transactionType,
transactionAmount,
transactionIcon;
final GestureTapCallback onTap;
const HistoryListTile({
Key key,
this.iconColor,
this.transactionName,
this.transactionType,
this.transactionAmount,
this.transactionIcon,
this.onTap,
}) : super(key: key);
@override
Widget build(BuildContext context) {
return Material(
color: Colors.transparent,
child: ListTile(
title: Text(transactionName),
subtitle: Text(transactionType),
trailing: Text(transactionAmount),
leading: CircleAvatar(
radius: 25,
child: Image.asset(
transactionIcon,
height: 25,
width: 25,
),
backgroundColor: iconColor,
),
enabled: true,
onTap: onTap,
),
);
}
}