[TOC]
写在最前面，想玩flutter最好有科学上网的梯子，否则被墙的整个人都暴躁了

下载SDK

在目标目录使用git拉取flutter的sdk

# 移动到目标目录 cd ${HOME}/env # 拉取sdk git clone https://github.com/flutter/flutter.git 

环境变量配置

• 需要提前配置好安卓开发环境，可以提前配置好jdk,android sdk等环境变量

• 需要配置flutter sdk的环境变量

• 需要配置flutter的镜像地址

  PUB_HOSTED_URL=https://pub.flutter-io.cn FLUTTER_STORAGE_BASE_URL=https://storage.flutter-io.cn 

.bash_profile的参考配置

# jdk begin JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home # jdk end # android sdk begin ANDROID_HOME=/Users/rexih/Library/Android/sdk ADB_HOME=/Users/rexih/Library/Android/sdk/platform-tools # android sdk end #android ndk begin NDK_HOME=/Users/rexih/Library/Android/sdk/ndk-bundle CMAKE_HOME=/Users/rexih/Library/Android/sdk/cmake/3.6.4111459 #android ndk end # flutter begin FLUTTER_HOME=/Users/rexih/env/flutter PUB_HOSTED_URL=https://pub.flutter-io.cn FLUTTER_STORAGE_BASE_URL=https://storage.flutter-io.cn # flutter end PATH=$FLUTTER_HOME/bin:$FLUTTER_HOME:$CMAKE_HOME/bin:$ANDROID_HOME/:$ANDROID_HOME/tools:$ADB_HOME:$NDK_HOME:$JAVA_HOME/bin:$PATH:. CLASSPATH=JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/dt.jar:. export JAVA_HOME export ANDROID_HOME export ADB_HOME export NDK_HOME export CMAKE_HOME export PATH export CLASSPATH export FLUTTER_HOME export PUB_HOSTED_URL export FLUTTER_STORAGE_BASE_URL 

Android Studio插件安装

打开as（本文使用的是3.2.1 stable）的plugin，下载插件Flutter，会自动下载插件Dart，确保两个插件勾选，重启as

环境诊断与修复

flutter提供doctor指令帮助用户诊断开发环境是否可用，根据命令行里的诊断结果逐步修复即可

• 第一次运行会自动下载Dart SDK

  Downloading Dart SDK from Flutter engine# ... Building flutter tool... # ... Flutter assets will be downloaded from https://storage.flutter-io.cn. Make sure you trust this source! # ... Doctor summary (to see all details, run flutter doctor -v): # ... 

• 诊断结果会告知去设置Android SDK的环境变量

• 诊断结果会告知运行flutter doctor --android-licenses通过licenses以使用

  [!] Android toolchain - develop for Android devices (Android SDK version 28.0.3) ! Some Android licenses not accepted.To resolve this, run: flutter doctor --android-licenses 

• 诊断结果会告知安装AS插

  [!] Android Studio (version 3.2) ✗ Flutter plugin not installed; this adds Flutter specific functionality. ✗ Dart plugin not installed; this adds Dart specific functionality. 

• 诊断结果会告知运行设备情况

  [!] Connected device ! No devices available 

• 诊断结果会告知idea和iOS的开发环境的可用性

设置gradle及代码仓库地址

• 国内被墙的很严重。gradle下载太慢了。建议先下载好gradle的对应版本，放置到本地gradle仓库里，以加快构建速度。（移动宽带直接下载也挺慢的）

• 手动下载gradle对应版本。例如下载gradle 4.10.2 地址:https://downloads.gradle.org/distributions/gradle-4.10.2-all.zip，下载完成后放到${HOME}/.gradle/wrapper/dists/gradle-4.10.2-all/9fahxiiecdb76a5g3aw9oi8rv，解压，修改文件锁gradle-4.10.2-all.zip.ok

• 使用镜像替代flutter的脚本仓库。找到flutter sdk的根目录，打开packages/flutter_tools/gradle/flutter.gradle，修改仓库地址

  buildscript { repositories { maven { url "https://maven.aliyun.com/repository/google" } maven { url "https://maven.aliyun.com/repository/jcenter" } maven { url "http://maven.aliyun.com/nexus/content/groups/public" } // google() // jcenter() } dependencies { classpath 'com.android.tools.build:gradle:3.2.1' } } 

  ​

创建Flutter项目

• 配置好开发环境后，AS新建项目时会增加新的创建选项Start a new Flutter project

• 设置项目名称时，必须遵守其命名规范，小写加_下划线，否则会提示

  Invalid project name: 'T' - must be a valid Dart package name (lower_case_with_underscores) 

• 点击播放键编译运行项目

热重载

修改后，不点击播放键，直接ctrl+s保存一下源文件，发现设备上直接同步了修改

1. 要查看您的更改, 只需调用 Save All (cmd-s / ctrl-s), 或点击 热重载按钮 (带有闪电⚡️图标的按钮).

flutter相关指令

查看连接设备

flutter devices1 connected device:Android SDK built for x86 • emulator-5554 • android-x86 • Android 9 (API 28) (emulator) 

切换flutter到Stable版本

# 查看可用版本 flutter channel # 切换到stable版本 flutter channel stable # 切换版本后再次调用flutter指令会重新配置开发环境 flutter 

其他

离线下载flutter和dart插件

9212-flutter
6351-dart

卡在Creating Flutter Project

查看项目目录下是否已经生成项目文件，如果有，强制关闭as进程，重启后打开此项目

flutter packages get运行时提示等待另一个flutter指令

Waiting for another flutter command to release the startup lock…

1. 打开flutter的安装目录/bin/cache/
2. 删除lockfile文件
3. 删除不掉则强制退出Dart.exe再删除
4. 重启AndroidStudio

参见issues 7768

Resolving dependencies...

改android里build.gradle脚本的仓库源

buildscript { repositories { maven { url 'https://maven.aliyun.com/repository/google' } maven { url 'https://maven.aliyun.com/repository/jcenter' } maven { url 'http://maven.aliyun.com/nexus/content/groups/public' } //google() //jcenter() }dependencies { classpath 'com.android.tools.build:gradle:3.2.1' } }allprojects { repositories { maven { url 'https://maven.aliyun.com/repository/google' } maven { url 'https://maven.aliyun.com/repository/jcenter' } maven { url 'http://maven.aliyun.com/nexus/content/groups/public' } //google() //jcenter() } } 

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