# 前言

Flutter 官网地址为 flutter.dev (opens new window)

开发环境为 manjaro

补充

有意思的是,当我重新安装 flutter 后:

# 此处为 gitlab 非 gitee
git clone https://github.com/flutter/flutter.git

以下在安装和使用时遇到的问题就消失了,但其中发生了什么也不可考究了。

所以不妨先按以下进行操作,最后再切换为 github 的仓库。

# 安装

# 1. Flutter SDK

官网推荐最简单的方式是使用 snap,而 snapd (opens new window) 是支持 manjaro 的,那么直接安装它:

# snap 官网说 manjaro 预装了 snap,但可惜的是我这边并没有
sudo pacman -S snapd

接着就可以安装 flutter 了:

sudo snap install flutter --classic

# error: cannot communicate with server: Post "http://localhost/v2/snaps/flutter": dial unix /run/snapd.socket: connect: no such file or directory

糟糕的是,安装失败了,找到解决方法 (opens new window)

sudo systemctl unmask snapd.service
systemctl start snapd.service

再继续执行上一步的安装命令,等待安装完成。

当然,由于网速问题,我选择了使用 git 下载的方式,并使用了 gitee 的仓库:

# 修正 gitee 仓库名为 flutter
git clone https://gitee.com/mirrors/Flutter.git flutter -b stable --depth 1

# 2. 添加环境变量

再将其路径写到 .bashrc.zshrcrc 文件写入,还要记得将镜像改为 cn,否则你可能会卡在 Building flutter tool...

# 增加 flutter
export PUB_HOSTED_URL=https://pub.flutter-io.cn
export FLUTTER_STORAGE_BASE_URL=https://storage.flutter-io.cn
export PATH="$PATH:[PATH_TO_FLUTTER_GIT_DIRECTORY]/flutter/bin"

接着就可以找到 flutterdart

which flutter dart

# 3. flutter doctor

可用 flutter doctor 来检测缺乏的环境。

Doctor summary (to see all details, run flutter doctor -v):
[] Flutter (Channel unknown, 1.22.0, on Linux, locale zh_CN.UTF-8)
[] Android toolchain - develop for Android devices
    ✗ Unable to locate Android SDK.
      Install Android Studio from:
      https://developer.android.com/studio/index.html
      On first launch it will assist you in installing the Android SDK
      components.
      (or visit
      https://flutter.dev/docs/get-started/install/linux#android-setup for
      detailed instructions).
      If the Android SDK has been installed to a custom location, set
      ANDROID_SDK_ROOT to that location.
      You may also want to add it to your PATH environment variable.

[!] Android Studio (not installed)
[!] Connected device
    ! No devices available

! Doctor found issues in 3 categories.

# 4. Android Studio

根据提示缺乏了 android studio

sudo pacman -S android-studio

安装完成后启动 Android Studio,根据提示一步步操作即可。

可以再使用 flutter doctor 检测一下:

Doctor summary (to see all details, run flutter doctor -v):
[] Flutter (Channel unknown, 1.22.0, on Linux, locale zh_CN.UTF-8)
 
[!] Android toolchain - develop for Android devices (Android SDK version
    30.0.2)
    ✗ Android licenses not accepted.  To resolve this, run: flutter doctor
      --android-licenses
[!] Android Studio
    ✗ Flutter plugin not installed; this adds Flutter specific functionality.
    ✗ Dart plugin not installed; this adds Dart specific functionality.
[!] Connected device
    ! No devices available

# 5. plugins

启动 Android Studio 后在其右下角有 Configure,选择 plugins

进入界面后搜索 flutter,点击 installed 后根据提示一步步确认即可。

糟糕的是,在 flutter doctor 检测下依然会提示未安装,但使用是可以使用的,ubuntu 20.04 也存在该问题 (opens new window)

# 6. toolchain

可以直接忽略:

flutter doctor --android-licenses

# 使用

# 1. 卡在 Creating Flutter Project

创建项目时卡在 Creating Flutter Project,但前往对应目录时发现项目已经创建完成,解决方案 (opens new window)

# 2. 卡在 flutter doctor

Checking Android licenses is taking an unexpectedly long time...

这个问题有点奇怪,但是直接关闭 Android Studio 后就没有问题了。

# 3. 卡在 Running Gradle task 'assembleDebug

参考这个解决方案 (opens new window)

# 获取详细的信息
flutter run -v

接下来的操作与其他回答均不一致,算是新手一顿乱操作竟然能运行了。

发现时在下载 gradle-5.6.2-all.zip 引发了问题,手动将该文件下载下来放入 /home/your_name/.gradle/wrapper/dists 中。

然后修改项目的 android/gradle/wrapper/gradle-wrapper.properties 文件中 distributionUrl 指向 file\:///home/your_name/.gradle/wrapper/dists/gradle-5.6.2-all.zip,然后将下载的文件放入该位置即可。

如果希望以后新建的项目都指向该地址呢?

回到之前 git clone flutter 的位置,找到 packages/flutter_tools/templates/app/android.tmpl/gradle/wrapper/gradle-wrapper.properties 文件,将 distributionUrl 指向 file\:///home/your_name/.gradle/wrapper/dists/gradle-5.6.2-all.zip 即可。

# 配置

# 1. 禁用 ios

# 查看使用说明及当前配置
flutter config -h

flutter config --no-enable-ios
# Settings:
#   enable-ios: false
上次更新: 2020年10月18日星期日下午2点51分