https://blog.csdn.net/Oven_maizi/article/details/126804404

首次运行 flutter dockor 报的错误，可以看到报错提示，安卓开发、win开发 还缺少依赖，但

web开发是可以的，那么只需要解决 网络资源不可用问题

PS E:\workspace\test_drive\flutter_application_1\lib> flutter doctor
Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel stable, 3.24.1, on Microsoft Windows [版本 10.0.22631.4037], locale zh-CN)
[√] Windows Version (Installed version of Windows is version 10 or higher)
[X] Android toolchain - develop for Android devices
    X 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/to/windows-android-setup for detailed instructions).
      If the Android SDK has been installed to a custom location, please use
      `flutter config --android-sdk` to update to that location.

[√] Chrome - develop for the web
[X] Visual Studio - develop Windows apps
    X Visual Studio not installed; this is necessary to develop Windows apps.
      Download at https://visualstudio.microsoft.com/downloads/.
      Please install the "Desktop development with C++" workload, including all of its default components
[!] Android Studio (not installed)
[√] Connected device (3 available)
[!] Network resources
    X A network error occurred while checking "https://maven.google.com/": 信号灯超时时间已到


! Doctor found issues in 4 categories.

解决办法：

在中国网络环境下使用 Flutter | Flutter 中文文档 - Flutter 中文开发者网站 - Flutter

根据上述文档，在powerShell执行下述命令

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

再次运行  flutter dockor，网络错误已经解决。

PS E:\workspace\test_drive\flutter_application_1\linux> flutter doctor
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):
[√] Flutter (Channel stable, 3.24.1, on Microsoft Windows [版本 10.0.22631.4037], locale zh-CN)
[√] Windows Version (Installed version of Windows is version 10 or higher)
[X] Android toolchain - develop for Android devices
    X 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/to/windows-android-setup for detailed instructions).
      If the Android SDK has been installed to a custom location, please use
      `flutter config --android-sdk` to update to that location.

[√] Chrome - develop for the web
[X] Visual Studio - develop Windows apps
    X Visual Studio not installed; this is necessary to develop Windows apps.
      Download at https://visualstudio.microsoft.com/downloads/.
      Please install the "Desktop development with C++" workload, including all of its default components
[!] Android Studio (not installed)
[√] Connected device (3 available)
[√] Network resources

! Doctor found issues in 3 categories.

后又发现上述命令只是临时修改当前终端的环境变量，还需在 Windows 中永久设置环境变量