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)
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
我的Java版本是15.0.1。适用于Mac操作系统。
这就是我解决问题的方法。
下载zip: jaf- 31_1 .zip从:https://download.oracle.com/otn-pub/java/jaf/1.1.1/jaf-1_1_1.zip?AuthParam=1609860571_68ca6f30491c76e81970a3849504fb6a
从https://download.oracle.com/otn-pub/java/jaf/1.1.1/jaf-1_1_1.zip?AuthParam=1609860571_68ca6f30491c76e81970a3849504fb6a下载了zip: jaxb-ri-2.3.1.zip
解压缩到一个文件夹:~/jars/。导出的类路径如下
export
CLASSPATH=~/jars/FastInfoset.jar:~/jars/activation.jar:~/jars/codemodel.jar:~/jars/dtd-parser.jar:~/jars/istack-commons-runtime.jar:~/jars/istack-commons-tools.jar:~/jars/jaf-1.1.1:~/jars/jaf-1_1_1.zip:~/jars/javax.activation-api.jar:~/jars/jaxb-api.jar:~/jars/jaxb-jxc.jar:~/jars/jaxb-ri:~/jars/jaxb-ri-2.3.1.zip:~/jars/jaxb-runtime.jar:~/jars/jaxb-xjc.jar:~/jars/relaxng-datatype.jar:~/jars/rngom.jar:~/jars/stax-ex.jar:~/jars/txw2.jar:~/jars/xsom.jar
cd ~/Library/Android/sdk/tools/bin/sdkmanager修改CLASSPATH如下所示
类路径=$CLASSPATH：$APP...
保存文件后重新执行命令。
这个问题有多种答案，取决于潜在的问题。也有多种答案可以间接解决实际问题。
核心问题是:
Android SDK工具与最新的Oracle JDK存在问题。您可以使用最新的Open JDK。(最新的OpenJDK附带Android Studio。)
你没有安装最新的Android SDK命令行工具。
您已经安装了最新的Android SDK命令行工具，但您使用的是E:\Android\ SDK \tools\bin而不是E:\Android\ SDK \cmdline-tools\latest\bin。
这里有一些系统的步骤来识别和解决你可能遇到的上述问题。
将环境变量指向Android Studio中的OpenJDK安装。根据您的安装，在这里找到:E:\Program Files\Android\Android Studio\jre。你必须遍历所有必要的变量，如PATH、JAVA_HOME、JAVA_BIN等，并确保它们都指向你的OpenJDK。
注意:您不必卸载/重新安装jdk。这可能只是修复了你上面的变量作为一个副作用。
检查环境变量是否正确(Windows: echo %JAVA_HOME%， echo %PATH%， where javac等)
进入Android Studio。在“设置”中，导航到“外观和行为>系统设置> Android SDK”。安装“Android SDK命令行工具”
在shell中，打开E:\Android\Sdk\cmdline-tools\latest\bin，然后运行sdkmanager——install "cmdline-tools;latest"
其他故障排除提示:
我把Android环境变量也弄乱了。运行'flutter doctor -v'，输出将帮助您排除其他环境配置问题。
