How to Run VASSAL on Android

[cholmcc]

@Hugs

Evidently there was something that broke somewhere (when the tablet suddenly froze while using Vassal program and the MultiVNC viewer, and NOT due to some idiot mistake that was made), which has no simple or easy fix.

Well, things doesn’t “just” change without something prompting it to - the machines have not yet achieved consciousness

@Hugs

The issue apparently resides in the fact that when Vassal now tries to start, it still gives the error message:

/data/data/com.termux/files/usr/bin/java is too old to run this version on Vassal. Please use Java 11 or later.

That’s clear and from your screenshot

it is also clear that is has nothing to do with the Java version installed, but because there’s a runtime linking error:

Error: LinkageError occurred while loading main class VASSAL.launch.JavaVersionChecker
       java.lang.UnsatisfiedLinkError: /data/data/com.termux/files/usr/lib/jvm/java-17-openjdk/lib/libnio.so: dlopen failed: cannot locate symbol "JNU_GetStringPlatformCharsStrict" referenced by "/data/data/com.termux/files/usr/lib/jvm/java-21-openjdk/lib/libnet.so"...

But notice how the Java 17 executable is trying to load stuff from Java 21 /data/data/com.termux/files/usr/lib/jvm/java-21-openjdk/lib/libnet.so - that’s not good.

@Hugs

Furthermore, I cannot access (nor change to) this directory to see what is or isn’t there by either of the following commands:

cd /data/data/com.termux/files/usr/bin/java
cd ~/files/usr/bin/java

/data/data/com.termux/files/usr/bin/java is a file - not a directory, so you cannot cd (change directory) to it. You can do

cd /data/data/com.termux/files/usr/bin/

though, but it doesn’t tell you much.

@Hugs

The tablet tells me I only have Java 17 and 21 installed. So, I uninstalled Java 17. It didn’t help. Thus, it looks like I have to resort to resetting the entire tablet, losing everything that is on it, and try starting over to “repair” whatever it was that broke…

Hold your horses - this is Unix not Windows - your only choice is not to scratch everything.

I suggest you try to de-install both Java 17 and 21, and then install Java 21: At the Termux prompt do (remember, the $ is the prompt and not part of what you need to type):

$ pkg uninstall openjdk-17-x   openjdk-21-x
$ pkg update 
$ pkg upgrade 
$ pkg install openjdk-21-x

If that doesn’t work, then perhaps you want to try to de-install Termux, Termux:Widget, Termux:X11 as Android apps and then redo the entire process How to Run VASSAL on Android (X11). Please make sure to read the whole thing before starting the process.

Yours,
Christian