android - VS 代码 : Failed to install the following Android SDK packages as some licences have not been accepted

Question

在这里，我要做的是使用 VS Code 构建我的 flutter 应用程序。当我运行以下命令 flutter build apk

FAILURE: Build failed with an exception.

* Where:
Build file 'F:\year-03\SEM2\events\GSOC\LabelLab\labellab_mobile\android\build.gradle' line: 27

* What went wrong:
A problem occurred evaluating root project 'android'.
> A problem occurred configuring project ':app'.
   > Failed to install the following Android SDK packages as some licences have not been accepted.
        build-tools;28.0.3 Android SDK Build-Tools 28.0.3
        platforms;android-28 Android SDK Platform 28
     To build this project, accept the SDK license agreements and install the missing components using the Android Studio SDK Manager.
     Alternatively, to transfer the license agreements from one workstation to another, see http://d.android.com/r/studio-ui/export-licenses.html   

     Using Android SDK: C:\Users\Mr.Semicolon\AppData\Local\Android\sdk

为了理解确切的解决方案，我将描述我在 VS Code IDE 中设置 Flutter 所遵循的所有步骤。
1. 从 https://flutter.dev 下载 Flutter Windows SDK
2.解压文件到C盘
3.进入文件路径 C:\flutter\bin并设置环境变量。
4. 在 VS Code IDE 中安装 Flutter 和 Dart 扩展。
5. 使用 flutter build apk 运行应用程序

编辑: flutter doctor输出，

[√] Flutter (Channel stable, v1.12.13+hotfix.9, on Microsoft Windows [Version 10.0.18362.720], locale en-GB)
[!] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
    X Android license status unknown.
      Try re-installing or updating your Android SDK Manager.
      See https://developer.android.com/studio/#downloads or visit https://flutter.dev/setup/#android-setup for detailed instructions.
[!] Android Studio (version 3.6)
    X Flutter plugin not installed; this adds Flutter specific functionality.
    X Dart plugin not installed; this adds Dart specific functionality.
[!] IntelliJ IDEA Ultimate Edition (version 2019.3)
    X Flutter plugin not installed; this adds Flutter specific functionality.
    X Dart plugin not installed; this adds Dart specific functionality.
[√] VS Code (version 1.44.0)
[!] Connected device
    ! No devices available

Answer 1

此错误是由于缺少许可协议(protocol)。
打开你的终端。flutter doctor --android-licenses按y接受每个许可证。