[TOC]

安装

本文以Mac系统为例

访问官网安装：

https://flutter.dev/docs/get-started/install/macos

下载SDK包flutter_macos_v1.2.1-stable.zip

命令行执行下面几个步骤：

➜ cd ~/development //替换成自己的目录
➜ unzip ~/Downloads/flutter_macos_v1.2.1-stable.zip
➜ export PATH="$PATH:`pwd`/flutter/bin"
➜ flutter precache
➜ flutter doctor

doctor提示问题

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, v1.2.1, on Mac OS X 10.14.3 18D109, locale
    zh-Hans-CN)
[!] Android toolchain - develop for Android devices (Android SDK version 26.0.1)
    ✗ Flutter requires Android SDK 28 and the Android BuildTools 28.0.3
      To update using sdkmanager, run:
        /Users/david/Library/Android/sdk/tools/bin/sdkmanager
        "platforms;android-28" "build-tools;28.0.3"
      or visit https://flutter.io/setup/#android-setup for detailed
      instructions.
    ! Some Android licenses not accepted.  To resolve this, run: flutter doctor
      --android-licenses
[!] iOS toolchain - develop for iOS devices (Xcode 10.2)
    ✗ libimobiledevice and ideviceinstaller are not installed. To install with
      Brew, run:
        brew update
        brew install --HEAD usbmuxd
        brew link usbmuxd
        brew install --HEAD libimobiledevice
        brew install ideviceinstaller
    ✗ ios-deploy not installed. To install:
        brew install ios-deploy
[!] Android Studio (version 2.3)
    ✗ Flutter plugin not installed; this adds Flutter specific functionality.
    ✗ Dart plugin not installed; this adds Dart specific functionality.
[!] VS Code (version 1.7.2)
    ✗ Flutter extension not installed; install from
      https://marketplace.visualstudio.com/items?itemName=Dart-Code.flutter
[!] Connected device
    ! No devices available
! Doctor found issues in 5 categories.

解决中遇到的问题

1，运行precache很慢

1	Downloading android-arm64-profile/darwin-x64 tools... ⢿ (This is taking an unexpect

解决方案

1
2
3

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

2，更新brew很慢

解决方案

使用中科大的镜像替换默认源

第一步，替换brew.git

1 2	➜ cd "$(brew --repo)" ➜ git remote set-url origin https://mirrors.ustc.edu.cn/brew.git

第二步：替换homebrew-core.git

1 2	➜ cd "$(brew --repo)/Library/Taps/homebrew/homebrew-core" ➜ git remote set-url origin https://mirrors.ustc.edu.cn/homebrew-core.git

最后使用下面命令进行更新，发现速度变的很快。替换镜像完成。
1
➜ brew update

3，brew遇到SSL certificate problem

➜ brew install --HEAD usbmuxd
==> Cloning https://git.sukimashita.com/libusbmuxd.git
Cloning into '/Users/david/Library/Caches/Homebrew/usbmuxd--git'...
fatal: unable to access 'https://git.sukimashita.com/libusbmuxd.git/': SSL certificate problem: certificate has expired
Error: An exception occurred within a child process:
  DownloadError: Failed to download resource "usbmuxd"
Failure while executing; `git clone --branch master https://git.sukimashita.com/libusbmuxd.git /Users/david/Library/Caches/Homebrew/usbmuxd--git` exited with 128. Here's the output:
Cloning into '/Users/david/Library/Caches/Homebrew/usbmuxd--git'...
fatal: unable to access 'https://git.sukimashita.com/libusbmuxd.git/': SSL certificate problem: certificate has expired

解决方案

1	➜ git config --global http.sslVerify false

4，android-licenses长时间没有反应

➜ flutter doctor
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel beta, v1.3.8, on Mac OS X 10.14.3 18D109, locale zh-Hans-CN)
⢿ Checking Android licenses is taking an unexpectedly long time...

解决方案

1
2
3

➜ flutter doctor --android-licenses
Warning: File /Users/david/.android/repositories.cfg could not be loaded.
All SDK package licenses accepted.======] 100% Computing updates...

5，Install the Flutter and Dart plugins

Android Studio 解决方案

To install these:

Start Android Studio.
Open plugin preferences (Preferences > Plugins on macOS, File > Settings > Plugins on Windows & Linux).
Select Browse repositories, select the Flutter plugin and click Install.
Click Yes when prompted to install the Dart plugin.
Click Restart when prompted.

VSCode 解决方案

Start VS Code.
Invoke View > Command Palette….
Type “install”, and select Extensions: Install Extensions.
Type “flutter” in the extensions search field, select Flutter in the list, and click Install. This also installs the required Dart plugin.

VSCode Validate your setup with the Flutter Doctor

Invoke View > Command Palette….
Type “doctor”, and select the Flutter: Run Flutter Doctor.
Review the output in the OUTPUT pane for any issues.

6，Android SDK版本不匹配

➜ flutter doctor
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel beta, v1.3.8, on Mac OS X 10.14.3 18D109, locale
    zh-Hans-CN)
[!] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
    ✗ Flutter requires Android SDK 28 and the Android BuildTools 28.0.3
      To update using sdkmanager, run:
        /Users/david/Library/Android/sdk/tools/bin/sdkmanager
        "platforms;android-28" "build-tools;28.0.3"
      or visit https://flutter.io/setup/#android-setup for detailed
      instructions.
[✓] iOS toolchain - develop for iOS devices (Xcode 10.2)
[✓] Android Studio (version 3.3)
[✓] VS Code (version 1.32.3)
[✓] Connected device (1 available)

解决方案

点击androidStudio菜单的Settings
点击Appearance&Behavior
点击System Settings
安装Android SDK 28

最后所有诊断都通过

➜ flutter doctor
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel beta, v1.3.8, on Mac OS X 10.14.3 18D109, locale
    zh-Hans-CN)
[✓] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
[✓] iOS toolchain - develop for iOS devices (Xcode 10.2)
[✓] Android Studio (version 3.3)
[✓] VS Code (version 1.32.3)
[✓] Connected device (1 available)

7. 新建flutter项目flutter Resolving dependencies…很慢

打开和新建flutter项目时发现，flutter Resolving dependencies…很慢。

解决办法：

打开Flutter SDK：flutter\packages\flutter_tools\gradle\flutter.gradle
改为以下即可解决！

buildscript {
    repositories {
        // google()
        // jcenter()
        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'}
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.2.1'
    }
}