flutter学习之路

步骤：
1、添加PageContent组件

①新建文件/widgets/page_content.dart  
②添加material依赖  
③编写无状态组件 
④添加name参数 
⑤使用Scaffold  

2、添加home页面

①新建文件/pages/home/index.dart  
②添加material、page_content依赖  
③编写无状态组件  
④使用PageContent  

3、添加Application应用根组件

①新建文件/application.dart  
②添加依赖  
③使用MaterialApp  

4、测试
目录如下图:

代码如下：
application.dart

import 'package:flutter/material.dart';
import './pages/home/index.dart';

class Application extends StatelessWidget {
  const Application({ Key key }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: HomePage(),
    );
  }
}

index.dart代码

import 'package:flutter/material.dart';

import '../../widgets/page_content.dart';

class HomePage extends StatelessWidget {
  const HomePage({ Key key }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Container(
      child: PageContent(name: '首页',),
    );
  }
}

PageContent代码

import 'package:flutter/material.dart';

class PageContent extends StatelessWidget {
  final String name;

  const PageContent({Key key, this.name}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('当前页面：$name'),),
    );
  }
}

入口main.dart

import 'package:flutter/material.dart';

import './application.dart';

void main() {
  runApp(Application());
}

效果图：