1_介绍

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Flutter是Google的UI工具包，可通过单个代码库为移动，web和桌面构建漂亮的，本机编译的应用程序 。

2_ubuntu搭建flutter

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第一步骤(安装andriod studio)

安装andriod studio

sudo snap install android-studio --classic

第二步骤(下载flutter SDK和安装git)

下载flutter SDK

设置权限

sudo chmod -R 777 flutter

安装git

sudo apt-get install git

第三步骤(设置环境变量)

勾选显示隐藏文件

export PATH="$PATH:/home/jin/Android/flutter/bin"
export PUB_HOSTED_URL=https://pub.flutter-io.cn
export FLUTTER_STORAGE_BASE_URL=https://storage.flutter-io.cn

应用

source ~/.bashrc

第四步骤(安装flutter插件)

第五步骤(安装openjdk8)

sudo apt-get install openjdk-8-jdk

android studio里面安装

第六步骤(检测flutter)

flutter doctor

flutter doctor --android-licenses

3_hello flutter

---

main.dart

import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'Flutter Demo'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({Key? key, required this.title}) : super(key: key);

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: const Center(
        child: Text('Hello flutter'),
      ),
    );
  }
}