Flutter报错:Android toolchain “but Android SDK not found at this location”

「爱情、让人受尽委屈。」 2023-08-17 16:42 152阅读 0赞

## 当前环境 ##

*  macOS 10.13.6
 *  Android Studio 3.5
 *  Android Studio 3.5
 *  Flutter 1.9.1+hotfix.2
 *  Dart 2.5.0

$ flutter --version
    Flutter 1.9.1+hotfix.2 • channel stable • https://github.com/flutter/flutter.git
    Framework • revision 2d2a1ffec9 (3 weeks ago) • 2019-09-06 18:39:49 -0700
    Engine • revision b863200c37
    Tools • Dart 2.5.0

## 报错“Android SDK not found at this location” ##

使用 flutter doctor 命令可以诊断当前的 flutter 环境的一些配置和工具的情况。

在本机环境中执行，报错 Android SDK 不再指定的路径中。

$ flutter doctor        
    Doctor summary (to see all details, run flutter doctor -v):
    [✓] Flutter (Channel stable, v1.9.1+hotfix.2, on Mac OS X 10.13.6 17G65, locale zh-Hans-CN)
    [✗] Android toolchain - develop for Android devices
        ✗ ANDROID_HOME = /usr/local/opt/android-sdk
          but Android SDK not found at this location.
    [✓] Xcode - develop for iOS and macOS (Xcode 10.1)
    [✓] Android Studio (version 3.5)
    [!] IntelliJ IDEA Ultimate Edition (version 2019.2)
        ✗ Flutter plugin not installed; this adds Flutter specific functionality.
        ✗ Dart plugin not installed; this adds Dart specific functionality.
    [!] IntelliJ IDEA Community Edition (version 2019.1.3)
        ✗ Flutter plugin not installed; this adds Flutter specific functionality.
        ✗ Dart plugin not installed; this adds Dart specific functionality.
    [✓] VS Code (version 1.35.1)
    [✓] Connected device (1 available)

## 解决办法 ##

可以看到提示信息里有ANDROID\_HOME的路径:

ANDROID_HOME = /usr/local/opt/android-sdk

打开 Android Studio 查看配置 【Preferences】:

查看SDK的路径: 【Apperance & Behavior】 > 【System Settings】 > 【Android SDK】

可以看到当前的 SDK 路径是：

/Users/wangtom/Library/Android/sdk

而 flutter doctor 诊断提示的路径 /usr/local/opt/android-sdk ，明细不一致。

现在我们将环境变量 ANDROID\_HOME 的路径改成和 Android Studio 的SDK路径一样:

$ export ANDROID_HOME="/Users/wangtom/Library/Android/sdk"

注意: 该配置修改仅在本次开机生效，如果重启了电脑需要再次执行。  
如果想长期生效请在 `~/.bash_profile` 文件中添加该环境变量。

查看一下配置变量：

$ echo $ANDROID_HOME
    /Users/wangtom/Library/Android/sdk

再重新执行 flutter doctor 继续诊断。这次不提示SDK路径对了，提示 一些证书没有同意。

$ flutter doctor 
    
    Doctor summary (to see all details, run flutter doctor -v):
    [✓] Flutter (Channel stable, v1.9.1+hotfix.2, on Mac OS X 10.13.6 17G65, locale zh-Hans-CN)
    [!] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
        ! Some Android licenses not accepted.  To resolve this, run: flutter doctor --android-licenses
    [✓] Xcode - develop for iOS and macOS (Xcode 10.1)
    [✓] Android Studio (version 3.5)
    [!] IntelliJ IDEA Ultimate Edition (version 2019.2)
        ✗ Flutter plugin not installed; this adds Flutter specific functionality.
        ✗ Dart plugin not installed; this adds Dart specific functionality.
    [!] IntelliJ IDEA Community Edition (version 2019.1.3)
        ✗ Flutter plugin not installed; this adds Flutter specific functionality.
        ✗ Dart plugin not installed; this adds Dart specific functionality.
    [✓] VS Code (version 1.35.1)
    [✓] Connected device (1 available)

安装提示执行 `flutter doctor --android-licenses` 命令，同意每个正式即可。

// 每个证书选择 y 都同意即可
    $ flutter doctor --android-licenses
    ... 
    Accept? (y/N): y
    
    2/5: License android-sdk-preview-license:
    Accept? (y/N): y
    
    3/5: License google-gdk-license:
    ...

## 再次执行flutter doctor验证 ##

最后再次执行 flutter doctor 验证一下，Android toolchain 也验证正常了。

$ flutter doctor                   
    Doctor summary (to see all details, run flutter doctor -v):
    [✓] Flutter (Channel stable, v1.9.1+hotfix.2, on Mac OS X 10.13.6 17G65, locale zh-Hans-CN)
    [✓] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
    [✓] Xcode - develop for iOS and macOS (Xcode 10.1)
    [✓] Android Studio (version 3.5)
    [!] IntelliJ IDEA Ultimate Edition (version 2019.2)
        ✗ Flutter plugin not installed; this adds Flutter specific functionality.
        ✗ Dart plugin not installed; this adds Dart specific functionality.
    [!] IntelliJ IDEA Community Edition (version 2019.1.3)
        ✗ Flutter plugin not installed; this adds Flutter specific functionality.
        ✗ Dart plugin not installed; this adds Dart specific functionality.
    [✓] VS Code (version 1.35.1)
    [✓] Connected device (1 available)
    
    ! Doctor found issues in 2 categories.

还有提示 `IntelliJ IDEA Ultimate Edition` 和 `IntelliJ IDEA Community Edition` 两个软件的警告，因为也没打算用这2个软件来开发 Flutter, 忽略即可。

## Reference ##

\[EDN\]