Online Android build NoClassDefFoundError for build.xml

[P5music]

As my CodenameOne version of my app is finished, I am curious to see if it works on real devices.

I want to test on Android first but I get this kind of errors when I request the Android online build:

C:\Users\myname\IdeaProjects\myapp\build.xml:532: java.lang.RuntimeException: java.lang.NoClassDefFoundError: com/sun/xml/bind/v2/model/annotation/AnnotationReader

I had a similar error in the first attempt.

I had some Java classes that were not used, so I removed them from the project and I tried again,

to get only an error about the build.xml file generated code portion having been removed or changed, or something similar.

Then I rebuild the project and invalidated/restart the IDE

to have the reported error above.

When I open the build.xml file there are some parameters in error (red color)

like

codename1.version, codename1.ios.appid, selectedOfflineBuilder and so on (25 issues)

Is it JDK8 that is needed?

I use JDK11 that seems to be supported, although in the developer guide JDK8 is mentioned as a pre-requisite for Android builds.

Thanks in advance

[Hannah R]

Check this discussion 
https://groups.google.com/g/codenameone-discussions/c/33M_ysTVQ1s

[P5music]

Hello,

If I execute 

java -version

in the MSDOS prompt I get

java version "15.0.1" 2020-10-20

Java(TM) SE Runtime Environment (build 15.0.1+9-18)

Java HotSpot(TM) 64-Bit Server VM (build 15.0.1+9-18, mixed mode, sharing)

Is it wrong?

I could not install 11 because I cannot access the Oracle login.

I did not understand what is 1.8. Do you mean 11.1.8?

And also, what is the IDEA counterpart of netbeans.conf?

Thanks

[Hannah R]

Per my understanding it has nothing to do with java version on your computer.
What I did, I changed my Project SDK from 11 to 1.8  in my IntelliJ Project Structure Settings :
    

[P5music]

Thanks, 

Sorry but I do not understand.

That's a very old version of JDK, why should I use it for my project?

You may refer to OpenJDK, indeed I found Microsoft OpenJDK 1.8 on my system from VisualStudio I think. Is it a different nomenclature?

I set it in the project settings and

invalidated/restart, recompiled, send Android build

but

the build.xml is still in error,

the output is different, that AnnotationReader error is gone but there are 3 unnamed errors for the build.xml and all those parameters are red in that file.

I got also many warning about syntactic nuances.

What can be done now?

Regards

[Shai Almog]

JDK 9 broke a lot of things. JDK 8 is still the most commonly used JDK because of that.

This is specifically a workaround to a problem with JAXB which is used in one place in our build process. We hope to remove that specific usage which will remove the need for that workaround.

[Hannah R]

1.8 is not an old JDK. It's just how they name it. https://www.quora.com/Do-Java-1-8-and-Java-8-refer-to-the-same-thing

You need to share a log or screenshot of your new errors. 

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[P5music]

I get many strange warnings like

C:\Users\myname\IdeaProjects\myapp\src\com\myapp\app\MyClass.java:30: error: cannot find symbol

File f = new File(something);

^

or

import java.util.concurrent.CountDownLatch;

                 ^

or

        latch=new CountDownLatch(1);

              ^

or also

error: type WeakReference does not take parameters

or

error: incompatible types: String cannot be converted to char

and so on. (It's a very long list, the IDE does not let me copy its entire text)

Regards

[Hannah R]

I can't say for all of those errors, but some of them you definitely must fix (like  incompatible types: String cannot be converted to char  or  java.util.concurrent.CountDownLatch;   -- it's might be not supported by codename one) . Your code could be ran smoothly in the simulator, but for Android build there is all another process and some things might be not supported (for example  CountDownLatch  -- Shai will know better if it's supported or not). So you need to find a way what to change it to. 

[P5music]

And what about the many build.xml parameters in red that produce the 3 errors?

[Hannah R]

You need to fix those errors in your code (use some other classes to achieve your goal), then your build will be successful. 

[P5music]

It's so strange because the red parameters in the build.xml file are totally unrelated to my source code.

However source problems seem to be related to File, WeakReference (does not like <T>), string.replaceFirst, replace, replaceALL (does not like the double quotes for chars?), CountDownLatch, BufferedReader.

Do you confirm those are not compatible with CoenameOne?

Thanks

[Shai Almog]

They aren't. You can see which APIs are supported by looking in our Javadocs https://www.codenameone.com/javadoc/