Jython isn't working on Android, due to the absence of java.lang.ClassValue

[z-zeechung]

Below is the error report. This might be resolved by manually implementing ClassValue.java. I'm not sure if there are still more problems to come, and I wish to know whether Jython is designed to run on Android.

E/AndroidRuntime: FATAL EXCEPTION: Thread-4
    Process: com.zeechung.cartark, PID: 29333
    java.lang.NoClassDefFoundError: Failed resolution of: Ljava/lang/ClassValue;
        at org.python.core.PyType.fromClass(PyType.java:2137)
        at org.python.core.PyObject.<init>(PyObject.java:85)
        at org.python.core.PyBuiltinCallable.<init>(PyBuiltinCallable.java:22)
        at org.python.core.PyBuiltinMethod.<init>(PyBuiltinMethod.java:16)
        at org.python.core.PyBuiltinMethod.<init>(PyBuiltinMethod.java:21)
        at org.python.core.PyType$type___init___exposer.<init>(Unknown Source:0)
        at org.python.core.PyType$PyExposer.<init>(Unknown Source:16)
        at org.python.core.PyType.<clinit>(Unknown Source:2)
        at org.python.core.PyType.fromClass(PyType.java:2137)
        at org.python.core.PyObject.<init>(PyObject.java:85)
        at org.python.core.PyBuiltinCallable.<init>(PyBuiltinCallable.java:22)
        at org.python.core.PyBuiltinMethod.<init>(PyBuiltinMethod.java:16)
        at org.python.core.PyBuiltinMethodNarrow.<init>(PyBuiltinMethodNarrow.java:23)
        at org.python.core.PyDataDescr$getset_descriptor___get___exposer.<init>(Unknown Source:2)
        at org.python.core.PyDataDescr$PyExposer.<init>(Unknown Source:15)
        at org.python.core.PyDataDescr.<clinit>(Unknown Source:2)
        at org.python.core.PyBuiltinCallable$PyExposer.<init>(Unknown Source:14)
        at org.python.core.PyBuiltinCallable.<clinit>(Unknown Source:2)
        at org.python.core.PyObject$PyExposer.<init>(Unknown Source:13)
        at org.python.core.PyObject.<clinit>(Unknown Source:2)
        at org.python.core.PyNone.getInstance(PyNone.java:28)
        at org.python.core.Py.<clinit>(Py.java:62)
        at org.python.core.Py.newStringMap(Py.java:850)
        at org.python.util.PythonInterpreter.<init>(PythonInterpreter.java:99)
        at org.python.util.PythonInterpreter.<init>(PythonInterpreter.java:93)
        at org.python.util.PythonInterpreter.<init>(PythonInterpreter.java:70)
        at com.zeechung.cartark.misc.ScriptEnv.<clinit>(ScriptEnv.java:27)
        at com.zeechung.cartark.misc.ScriptEnv.python(ScriptEnv.java:31)
        at com.zeechung.cartark.llm.QianfanLLM.lambda$static$0(QianfanLLM.java:105)
        at com.zeechung.cartark.llm.QianfanLLM$$ExternalSyntheticLambda0.run(Unknown Source:0)
        at java.lang.Thread.run(Thread.java:923)
     Caused by: java.lang.ClassNotFoundException: Didn't find class "java.lang.ClassValue" on path: DexPathList[[dex file "/data/data/com.zeechung.cartark/code_cache/.overlay/base.apk/classes3.dex", dex file "/data/data/com.zeechung.cartark/code_cache/.overlay/base.apk/classes4.dex", dex file "/data/data/com.zeechung.cartark/code_cache/.overlay/base.apk/classes5.dex", dex file "/data/data/com.zeechung.cartark/code_cache/.overlay/base.apk/classes6.dex", dex file "/data/data/com.zeechung.cartark/code_cache/.overlay/base.apk/classes7.dex", dex file "/data/data/com.zeechung.cartark/code_cache/.overlay/base.apk/classes8.dex", dex file "/data/data/com.zeechung.cartark/code_cache/.overlay/base.apk/classes9.dex", zip file "/data/app/~~rD_2M-vJ5IJ-P-zaqxA_xg==/com.zeechung.cartark-N7ZAG7XuR3xxQQYo2CQldA==/base.apk"],nativeLibraryDirectories=[/data/app/~~rD_2M-vJ5IJ-P-zaqxA_xg==/com.zeechung.cartark-N7ZAG7XuR3xxQQYo2CQldA==/lib/x86, /system/lib, /system_ext/lib]]
        at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:207)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
        at org.python.core.PyType.fromClass(PyType.java:2137) 
        at org.python.core.PyObject.<init>(PyObject.java:85) 
        at org.python.core.PyBuiltinCallable.<init>(PyBuiltinCallable.java:22) 
        at org.python.core.PyBuiltinMethod.<init>(PyBuiltinMethod.java:16) 
        at org.python.core.PyBuiltinMethod.<init>(PyBuiltinMethod.java:21) 
        at org.python.core.PyType$type___init___exposer.<init>(Unknown Source:0) 
        at org.python.core.PyType$PyExposer.<init>(Unknown Source:16) 
        at org.python.core.PyType.<clinit>(Unknown Source:2) 
        at org.python.core.PyType.fromClass(PyType.java:2137) 
        at org.python.core.PyObject.<init>(PyObject.java:85) 
        at org.python.core.PyBuiltinCallable.<init>(PyBuiltinCallable.java:22) 
        at org.python.core.PyBuiltinMethod.<init>(PyBuiltinMethod.java:16) 
        at org.python.core.PyBuiltinMethodNarrow.<init>(PyBuiltinMethodNarrow.java:23) 
        at org.python.core.PyDataDescr$getset_descriptor___get___exposer.<init>(Unknown Source:2) 
        at org.python.core.PyDataDescr$PyExposer.<init>(Unknown Source:15) 
        at org.python.core.PyDataDescr.<clinit>(Unknown Source:2) 
        at org.python.core.PyBuiltinCallable$PyExposer.<init>(Unknown Source:14) 
        at org.python.core.PyBuiltinCallable.<clinit>(Unknown Source:2) 
        at org.python.core.PyObject$PyExposer.<init>(Unknown Source:13) 
        at org.python.core.PyObject.<clinit>(Unknown Source:2) 
        at org.python.core.PyNone.getInstance(PyNone.java:28) 
        at org.python.core.Py.<clinit>(Py.java:62) 
        at org.python.core.Py.newStringMap(Py.java:850) 
        at org.python.util.PythonInterpreter.<init>(PythonInterpreter.java:99) 
        at org.python.util.PythonInterpreter.<init>(PythonInterpreter.java:93) 
        at org.python.util.PythonInterpreter.<init>(PythonInterpreter.java:70) 
        at com.zeechung.cartark.misc.ScriptEnv.<clinit>(ScriptEnv.java:27) 
        at com.zeechung.cartark.misc.ScriptEnv.python(ScriptEnv.java:31) 
        at com.zeechung.cartark.llm.QianfanLLM.lambda$static$0(QianfanLLM.java:105) 
        at com.zeechung.cartark.llm.QianfanLLM$$ExternalSyntheticLambda0.run(Unknown Source:0) 
        at java.lang.Thread.run(Thread.java:923) 

[jeff5]

I think Jython can't run on Android. We don't test on Android. It has been asked for a few times now. As I understand it, some API is absent that is necessary to load byte code generated at run time. If you can avoid that need in your application, it may be possible to compile all the modules and then translate the class files you get.

The amount missing is less in later versions of Android. I would like it to be possible eventually, and thought I knew roughly how.

However, I am surprised that ClassValue should be one of the missing pieces: that's really quite fundamental.