Flutter-在路线之间推动并获取价值

您可以创建

MaterialPageRoute

ContaPage

import "package:flutter/material.dart";void main() {  runApp(new MyApp());}class MyApp extends StatelessWidget {  @override  Widget build(BuildContext context) {    return new MaterialApp(      title: "MyApp",      home: new HomePage(),    );  }}class HomePage extends StatelessWidget {  @override  Widget build(BuildContext context) => new Scaffold(    appBar: new AppBar(      backgroundColor: new Color(0xFF26C6DA),    ),    body: new ListView  (      children: <Widget>[        new FlatButton(          child: new Text("ok"),          textColor: new Color(0xFF66BB6A),          onPressed: () { Navigator.push(context, new MaterialPageRoute(   builder: (BuildContext context) => new ContaPage(new Color(0xFF66BB6A)), ));          },        ),      ],    )  );}class ContaPage extends StatelessWidget {  ContaPage(this.color);  final Color color;  @override  Widget build(BuildContext context) => new Scaffold(    appBar: new AppBar(      backgroundColor: color,    ),  );}