当安装android sdk工具时，会产生以下错误:
java.lang.NoClassDefFoundError: javax / xml /绑定/注释/ XmlSchema
为什么会发生这种情况，如何解决?
调试输出:
$ java --version
java 9
Java(TM) SE Runtime Environment (build 9+181)
Java HotSpot(TM) 64-Bit Server VM (build 9+181, mixed mode)
$ brew cask install android-sdk
==> Caveats
We will install android-sdk-tools, platform-tools, and build-tools for you.
You can control android sdk packages via the sdkmanager command.
You may want to add to your profile:
'export ANDROID_SDK_ROOT=/usr/local/share/android-sdk'
This operation may take up to 10 minutes depending on your internet connection.
Please, be patient.
==> Satisfying dependencies
==> Downloading https://dl.google.com/android/repository/sdk-tools-darwin-3859397.zip
Already downloaded: /Users/tomasnovella/Library/Caches/Homebrew/Cask/android-sdk--3859397,26.0.1.zip
==> Verifying checksum for Cask android-sdk
==> Installing Cask android-sdk
==> Exception in thread "main"
==> java.lang.NoClassDefFoundError: javax/xml/bind/annotation/XmlSchema
==> at com.android.repository.api.SchemaModule$SchemaModuleVersion.<init>(SchemaModule.java:156)
==> at com.android.repository.api.SchemaModule.<init>(SchemaModule.java:75)
==> at com.android.sdklib.repository.AndroidSdkHandler.<clinit>(AndroidSdkHandler.java:81)
==> at com.android.sdklib.tool.SdkManagerCli.main(SdkManagerCli.java:117)
==> at com.android.sdklib.tool.SdkManagerCli.main(SdkManagerCli.java:93)
==> Caused by: java.lang.ClassNotFoundException: javax.xml.bind.annotation.XmlSchema
==> at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:582)
==> at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:185)
==> at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:496)
==> ... 5 more
Error: Command failed to execute!
==> Failed command:
/usr/local/Caskroom/android-sdk/3859397,26.0.1/tools/bin/sdkmanager tools platform-tools build-tools;26.0.1
==> Standard Output of failed command:
==> Standard Error of failed command:
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.SdkManagerCli.main(SdkManagerCli.java:117)
要解决这个错误，可以降级Java版本。
或在您的终端上导出以下选项:
Linux -麦克:
export JAVA_OPTS='-XX:+IgnoreUnrecognizedVMOptions --add-modules java.se.ee'
窗口:
set JAVA_OPTS=-XX:+IgnoreUnrecognizedVMOptions --add-modules java.se.ee
如果这不起作用，则尝试导出java.xml.bind。
Linux:
export JAVA_OPTS='-XX:+IgnoreUnrecognizedVMOptions --add-modules java.xml.bind'
窗口:
set JAVA_OPTS=-XX:+IgnoreUnrecognizedVMOptions --add-modules java.xml.bind
为了永久保存它，您可以在Linux上的概要文件中导出JAVA_OPTS。zshrc， .bashrc等)或将其作为Windows上永久的环境变量添加。
ps.这不适用于Java 11/11+，它没有Java EE模块。对于这个选项，降级Java版本或等待Flutter更新是个好主意。
参考:JDK 11: Java EE模块之路的尽头
Linux用户(我使用的是Debian发行版，Kali)
以下是我的解决方法。
如果您还没有jdk-8，您可以在oracle的网站上获得它
https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html
我得到了jdk-8u191-linux-x64.tar.gz
步骤1 -安装Java
在一个合适的位置移动并打开它，像这样
$ mv jdk-8u191-linux-x64.tar.gz /suitablelocation/
$ tar -xzvf /suitablelocation/jdk-8u191-linux-x64.tar.gz
您应该得到一个解压缩的文件夹，如jdk1.8.0_191
您可以随后删除tarball以节省空间
步骤2 -设置默认java位置的替代方案
$ update-alternatives --install /usr/bin/java java /suitablelocation/jdk1.8.0_191/bin/java 1
$ update-alternatives --install /usr/bin/javac javac /suitablelocation/jdk1.8.0_191/bin/javac 1
步骤3 -选择您的默认选项
$ update-alternatives --set java /suitablelocation/jdk1.8.0_191/bin/java
$ update-alternatives --set javac /suitablelocation/jdk1.8.0_191/bin/javac
步骤4 -确认默认java版本
$ java -version
笔记
In the original article here: https://forums.kali.org/showthread.php?41-Installing-Java-on-Kali-Linux,
the default plugin for mozilla was also set. I assume we don't really need the plugins as we're
simply trying to develop for android.
As in @spassvogel's answer, you should also place a @repositories.cfg file in your ~/.android directory
as this is needed to update the tools repo lists
Moving some things around may require root authority. Use sudo wisely.
For sdkmanager usage, see official guide: https://developer.android.com/studio/command-line/sdkmanager
因为Java 11已经删除了JavaEE，你需要下载一些jar并添加到类路径中:
JAXB:
https://javaee.github.io/jaxb-v2/
贾夫：
https://www.oracle.com/technetwork/articles/java/index-135046.html
然后编辑sdkmanager.bat，以便设置CLASSPATH=…以;%CLASSPATH%结束
将CLASSPATH设置为包含JAXB和JAF:
set CLASSPATH=jaxb-core.jar;jaxb-impl.jar;jaxb-api.jar;activation.jar
那么sdkmanager.bat就可以工作了。
我也有这个错误
Exception in thread "main" java.lang.NoClassDefFoundError: javax/xml/bind/annotation/XmlSchema
at com.android.repository.api.SchemaModule$SchemaModuleVersion.<init>(SchemaModule.java:156)
at com.android.repository.api.SchemaModule.<init>(SchemaModule.java:75)
at com.android.sdklib.repository.AndroidSdkHandler.<clinit>(AndroidSdkHandler.java:81)
at com.android.sdklib.tool.sdkmanager.SdkManagerCli.main(SdkManagerCli.java:73)
at com.android.sdklib.tool.sdkmanager.SdkManagerCli.main(SdkManagerCli.java:48)
Caused by: java.lang.ClassNotFoundException: javax.xml.bind.annotation.XmlSchema
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:582)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:190)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:499)
... 5 more
然后不再卸载最新的Java环境(在我的例子中是Java 13)
安装Java 8，
我已经完成了以下步骤
打开android studio >进入配置>选择SDK管理器>进入SDK工具>勾选android SDK命令行工具>应用>并等待安装
重新启动命令行工具
输入命令颤振医生
输入命令flutter doctor——android-licenses
并输入y来接受所有的许可。
