C:\Users\USER>flutter doctor
Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel stable, 2.0.6, on Microsoft Windows [Version 10.0.19042.928], locale en-US)
[!] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
X Android license status unknown.
Run flutter doctor --android-licenses to accept the SDK licenses.
See https://flutter.dev/docs/get-started/install/windows#android-setup for more details.
[√] Chrome - develop for the web
[√] Android Studio
[√] VS Code (version 1.56.1)
[√] Connected device (2 available)
! Doctor found issues in 1 category.
C:\Users\USER>flutter doctor --android-licenses
Error: Could not find or load main class J\AppData\Local\Android\Sdk\cmdline-tools\latest\bin\\..
Caused by: java.lang.ClassNotFoundException: J\AppData\Local\Android\Sdk\cmdline-tools\latest\bin\\//
编辑1:
我尝试重新安装sdk (从appdata/android/sdk完全删除文件后)。它有点工作,但现在显示了新的错误:
C:\Users\USER>flutter doctor --android-licenses
Exception in thread "main" java.lang.NoClassDefFoundError: javax/xml/bind/annotation/XmlSchema
at com.android.repository.api.SchemaModule$SchemaModuleVersion.<init>(SchemaModule.java:156)
at com.android.repository.api.SchemaModule.<init>(SchemaModule.java:75)
at com.android.sdklib.repository.AndroidSdkHandler.<clinit>(AndroidSdkHandler.java:81)
at com.android.sdklib.tool.sdkmanager.SdkManagerCli.main(SdkManagerCli.java:73)
at com.android.sdklib.tool.sdkmanager.SdkManagerCli.main(SdkManagerCli.java:48)
Caused by: java.lang.ClassNotFoundException: javax.xml.bind.annotation.XmlSchema
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
... 5 more
发布于 2021-05-12 21:34:04
经过大量的搜索和许多不同类型的错误,从环境变量错误和java错误,我只是卸载了android studio,java和flutter文件删除appdatas等,并重新安装它现在颤动医生工作正常。
我知道这不是一个好的解决方案,但如果其他方法都失败了,有人可以尝试一下。非常感谢
发布于 2021-05-30 16:50:36
这个问题的症结似乎在于Android SDK路径中的空格,例如,如果您在windows上的用户名是"John Smith",它将无法检测android SDK。解决方案是将“C:\Users\John Smith\AppData\Local\Android\Sdk”移动到一个没有空格的路径,例如'C:\Android\Sdk‘。然后运行以下命令
flutter config --android-sdk "C:\Android\Sdk"
PS:对于显示"!Android Studio (未安装)“的相关问题,请运行以下命令,手动将其指向默认的Android Studio安装位置
flutter config --android-studio-dir "C:\Program Files\Android\Android Studio"
https://stackoverflow.com/questions/67500098
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