I've been looking around extensively to try and figure out why I continued getting this exception. I've seen similar issues, but none that could resolve my issue.
whenever I run flutter doctor
This pops up:
[!] Android toolchain - develop for Android devices (Android SDK version 30.0.1)
X Android license status unknown.
Try re-installing or updating your Android SDK Manager.
See https://developer.android.com/studio/#downloads or visit visit
https://flutter.dev/docs/get-started/install/windows#android-setup for detailed instructions.
I have checked and my environment variables are all set
Then when I type flutter doctor --android-licenses
I get this error
Exception in thread "main" java.lang.NoClassDefFoundError: javax/xml/bind/annotation/XmlSchema
at com.android.repository.api.SchemaModule$SchemaModuleVersion.<init>(SchemaModule.java:156)
at com.android.repository.api.SchemaModule.<init>(SchemaModule.java:75)
at com.android.sdklib.repository.AndroidSdkHandler.<clinit>(AndroidSdkHandler.java:81)
at com.android.sdklib.tool.sdkmanager.SdkManagerCli.main(SdkManagerCli.java:73)
at com.android.sdklib.tool.sdkmanager.SdkManagerCli.main(SdkManagerCli.java:48)
Caused by: java.lang.ClassNotFoundException: javax.xml.bind.annotation.XmlSchema
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:602)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
... 5 more
Can you please help, I am confused and anything would really help
I believe that flutter doctor --android-licenses
simply invokes <ANDROID_HOME>/tools/bin/sdkmanager
from Android SDK. sdkmanager
is a small wrapper that finds JVM and starts java program.
The following line implies that Java 9+ is used to run the sdkmanager
.
java.lang.NoClassDefFoundError: javax/xml/bind/annotation/XmlSchema
Unfortunately, sdkmanager
is not capable to run on new Java versions. So there might be few solutions:
JAVA_HOME
environment variable pointing to JDK 1.8 before running flutter doctor
. Eg set JAVA_HOME=...
on Windows or export JAVA_HOME=...
on linuxsdkmanager
running on Java 11
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