flutter找不到Android SDK

Question

我已经通过AUR安装了flutter。我还安装了aur/android-sdk 26.0.2-1。当我运行flutter run时，我得到：

Warning! This package referenced a Flutter repository via the .packages file that is
no longer available. The repository from which the 'flutter' tool is currently
executing will be used instead.
  running Flutter tool: /home/dair/.flutter-sdk
  previous reference  : /home/dair/flutter
This can happen if you deleted or moved your copy of the Flutter repository, or
if it was on a volume that is no longer mounted or has been mounted at a
different location. Please check your system path to verify that you are running
the expected version (run 'flutter --version' to see which flutter is on your path).

Unable to locate a development device; please run 'flutter doctor' for information about installing additional components.

首先，运行flutter--version，并收到：

Flutter • channel alpha • https://github.com/flutter/flutter.git
Framework • revision e2f54df5ab (9 days ago) • 2017-06-02 10:43:54 -0700
Engine • revision 1f2aa07571
Tools • Dart 1.24.0-dev.3.0

不知道“看哪一个扑在你的路上”到底是什么意思。接下来我运行flutter doctor并得到：

[✓] Flutter (on Linux, locale en_US.UTF-8, channel alpha)
    • Flutter at /home/christopher/.flutter-sdk
    • Framework revision e2f54df5ab (9 days ago), 2017-06-02 10:43:54 -0700
    • Engine revision 1f2aa07571
    • Tools Dart version 1.24.0-dev.3.0

[✗] Android toolchain - develop for Android devices
    ✗ ANDROID_HOME = /opt/android-sdk
      but Android SDK not found at this location.

[✓] Android Studio (version 2.3)
    • Android Studio at /usr/local/android-studio
    • Gradle version 3.2
    • Java version: OpenJDK Runtime Environment (build 1.8.0_112-release-b06)

[✓] Connected devices
    • None

但是，如果我cd到/opt/android-sdk中，我会得到：

➜  ~ cd /opt/android-sdk 
➜  android-sdk ls
add-ons  build-tools  emulator  platforms  tools

Answer 1

当我尝试flutter doctor命令时，也遇到了同样的问题：

问题很明显，它的发生是因为flutter没有为您的Android SDK创建路径。

解决方法有两种：

或者永远保存它，用Android sdk路径导出android_home。

我通过在我的机器上导出android_home来解决这个问题（Arch Linux，但这适用于任何Unix实例）。

这将解决您的问题，但您可能还需要sdk、platform-tools、tools和ndk-build路径（当然，需要首先安装所有内容）到我的配置文件（在我的情况下是.zshrc文件，您的.bashrc等文件上也可以这样做）：

#SDK exporting - this will solve your issue
export ANDROID_HOME=/home/{user}/Android/Sdk 

#Tools exporting - it can be need in your case
export PATH=/home/{user}/Android/Sdk/platform-tools:$PATH
export PATH=/home/{user}/Android/Sdk/tools:$PATH
export PATH=/home/{user}/Android/ndk-build:$PATH

#Flutter binary exporting
export PATH=/home/{user}/flutter/bin:$PATH

然后，我重新加载了我的配置文件（我的配置文件是.zshrc文件，在您的情况下使用您的文件。例如.bashrc):

source ~/.zshrc

之后，flutter doctor运行正常。