对我来说，运行这个命令效果很好:

flutter config --android-sdk /path/to/your/sdk

如果您已经下载了cmdline-tools和Android SDK，请确保Flutter没有在错误的目录中查找:

flutter config --android-sdk=""

我的解决过程如下:

~/Library/Android/sdk/tools/bin/sdkmanager --install "cmdline-tools;latest" Exception in thread "main" java.lang.NoClassDefFoundError: javax/xml/bind/annotation/XmlSchema at com.android.repository.api.SchemaModule$SchemaModuleVersion.<init>(SchemaModule.java:156) at com.android.repository.api.SchemaModule.<init>(SchemaModule.java:75) at com.android.sdklib.repository.AndroidSdkHandler.<clinit>(AndroidSdkHandler.java:81) at com.android.sdklib.tool.sdkmanager.SdkManagerCli.main(SdkManagerCli.java:73) at com.android.sdklib.tool.sdkmanager.SdkManagerCli.main(SdkManagerCli.java:48) Caused by: java.lang.ClassNotFoundException: javax.xml.bind.annotation.XmlSchema at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:636) at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:182) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:519) ... 5 more Install Android SDK Command-line Tools in Android Studio: Preferences → Appearance & Behavior → System Settings → Android SDK → SDK Tools → Android SDK Command-line Tools (latest) flutter doctor Doctor summary (to see all details, run flutter doctor -v): [✓] Flutter (Channel stable, 2.5.0, on macOS 11.5.2 20G95 darwin-x64, locale zh-Hans-CN) [✓] Android toolchain - develop for Android devices (Android SDK version 29.0.3) [✓] Xcode - develop for iOS and macOS [✓] Chrome - develop for the web [✓] Android Studio (version 2020.3) [✓] IntelliJ IDEA Ultimate Edition (version 2021.2) [✓] IntelliJ IDEA Ultimate Edition (version 2021.2) [✓] Connected device (2 available) • No issues found!

对我来说，运行这个命令效果很好:

flutter config --android-sdk /path/to/your/sdk

对于macOS，我运行这个命令;

cd ~/Library/Android/sdk/tools/bin
./sdkmanager --install "cmdline-tools;latest"

然后，当我再次运行flutter doctor命令时，它确认问题已解决。

Windows上的Android SDK管理器截图

从SDK管理器中安装工具请参见附件截图。