Android 4.4.2 throws java.lang.NoSuchMethodError: sun.misc.Unsafe.putBoolean

XStream contains now a new SunLimitedUnsafeReflectionProvider that is only used to allocate new instances, but not for writing fields. That is done with pure Java functionality in this implementation. This ReflectionProvider is automatically used by default, if the sun.misc.Unsafe does not have all the individual put methods i.e. it should be used for Android 4.4.2 automatically. Fixed in trunk and 1.4.x branch. A new 1.4.7-SNAPSHOT has been uploaded, can you give it a try?

Yes, of course, I will do it, but not earlier than this weekend. But please tell me where I can download it (I'm only used to download stable jars..).

It's in the Codehaus repository: https://nexus.codehaus.org/content/groups/public/com/thoughtworks/xstream/xstream-distribution/1.4.7-SNAPSHOT/

Alternatively you might simply add this SNAPSHOT repository to your Maven configuration.

I tried version 1.4.7, but unfortunately it does not work even there, where 1.4.6 worked correctly (I've just replaced lib, and did no changes in code).

Android 4.1.2

E/dalvikvm(8462): Could not find class 'java.beans.EventHandler', referenced from method com.thoughtworks.xstream.converters.reflection.ReflectionConverter.canConvert
E/AndroidRuntime(8462): FATAL EXCEPTION: Thread-12904
E/AndroidRuntime(8462): java.lang.NoClassDefFoundError: java.beans.EventHandler
E/AndroidRuntime(8462): at com.thoughtworks.xstream.converters.reflection.ReflectionConverter.canConvert(ReflectionConverter.java:40)
E/AndroidRuntime(8462): at com.thoughtworks.xstream.core.DefaultConverterLookup.lookupConverterForType(DefaultConverterLookup.java:56)
E/AndroidRuntime(8462): at com.thoughtworks.xstream.XStream$1.lookupConverterForType(XStream.java:488)
E/AndroidRuntime(8462): at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:56)
E/AndroidRuntime(8462): at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:50)
E/AndroidRuntime(8462): at com.thoughtworks.xstream.core.TreeUnmarshaller.start(TreeUnmarshaller.java:134)
E/AndroidRuntime(8462): at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.unmarshal(AbstractTreeMarshallingStrategy.java:32)
E/AndroidRuntime(8462): at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1163)
E/AndroidRuntime(8462): at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1147)
E/AndroidRuntime(8462): at com.thoughtworks.xstream.XStream.fromXML(XStream.java:1018)
E/AndroidRuntime(8462): at com.thoughtworks.xstream.XStream.fromXML(XStream.java:1009)

Thanks for heads-up. This was caused by a different change in trunk fixing a security issue when supporting the Java Beans EventHandler OOTB. This should be fixed now. I've published a new SNAPSHOT, you may give it again a try.