Error running APK: java.lang.UnsatisfiedLinkError: dlopen failed: cannot locate symbol "JNI_OnLoad_javajpeg" referenced by [..]/lib&arm64/libsubstrate.so"

[taranion]

I am not sure where to report this - here or at substrate ...

Client Version: 1.0.7
Android 11
Tested with GraalVM 21.1 and 21.3 (Java 11 variant)
Built on: Fedora 34 or GitHub actions on ubuntu-18.04

I can create native images of my application for Android or Linux and run it just fine on Linux.
On Android (11) I get an UnsatisfiedLinkError for JNI_Onload_javajpeg in libsubstrate

10-20 13:32:04.658 24861 24861 D AndroidRuntime: Shutting down VM
10-20 13:32:04.660 24861 24861 E AndroidRuntime: FATAL EXCEPTION: main
10-20 13:32:04.660 24861 24861 E AndroidRuntime: Process: de.myapp.cfxmobile, PID: 24861
10-20 13:32:04.660 24861 24861 E AndroidRuntime: java.lang.UnsatisfiedLinkError: dlopen failed: cannot locate symbol "JNI_OnLoad_javajpeg" referenced by "/data/app/~~2xTVqTzqtI5R4y6mDrHE0A==/de.myapp.cfxmobile-ZmjpH0G4TxhquxRapj2p0Q==/lib/arm64/libsubstrate.so"...
10-20 13:32:04.660 24861 24861 E AndroidRuntime: 	at java.lang.Runtime.loadLibrary0(Runtime.java:1087)
10-20 13:32:04.660 24861 24861 E AndroidRuntime: 	at java.lang.Runtime.loadLibrary0(Runtime.java:1008)
10-20 13:32:04.660 24861 24861 E AndroidRuntime: 	at java.lang.System.loadLibrary(System.java:1664)
10-20 13:32:04.660 24861 24861 E AndroidRuntime: 	at com.gluonhq.helloandroid.MainActivity.surfaceCreated(MainActivity.java:104)
10-20 13:32:04.660 24861 24861 E AndroidRuntime: 	at android.view.SurfaceView.updateSurface(SurfaceView.java:1153)
10-20 13:32:04.660 24861 24861 E AndroidRuntime: 	at android.view.SurfaceView.lambda$new$0$SurfaceView(SurfaceView.java:173)

Probably related, probably not: On my Fedora 34 machine, the regular Java runtime fails to display JPEG files since an Fedora update. To eliminate my local machine I tested using Github actions, but got the same problem with the resulting APK.

[mipastgt]

Did you try with https://github.com/gluonhq/graal/releases/tag/gluon-21.2.0-dev-20210621_1207 Note: This is a Gluon build and not the standard GraalVM build.

[taranion]

No, I hadn't. I just did and the result (with an APK built with that GraalVM build) is the same.

10-20 15:05:31.291  9681  9681 D AndroidRuntime: Shutting down VM
10-20 15:05:31.292  9681  9681 E AndroidRuntime: FATAL EXCEPTION: main
10-20 15:05:31.292  9681  9681 E AndroidRuntime: Process: de.myapp.cfxmobile, PID: 9681
10-20 15:05:31.292  9681  9681 E AndroidRuntime: java.lang.UnsatisfiedLinkError: dlopen failed: cannot locate symbol "JNI_OnLoad_javajpeg" referenced by "/data/app/~~91FjfM9W8SW5LoKfJnO3-A==/de.myapp.cfxmobile-d2pDXV9obJdeNxDWIwRmAw==/lib/arm64/libsubstrate.so"...
10-20 15:05:31.292  9681  9681 E AndroidRuntime: 	at java.lang.Runtime.loadLibrary0(Runtime.java:1087)
10-20 15:05:31.292  9681  9681 E AndroidRuntime: 	at java.lang.Runtime.loadLibrary0(Runtime.java:1008)
10-20 15:05:31.292  9681  9681 E AndroidRuntime: 	at java.lang.System.loadLibrary(System.java:1664)
10-20 15:05:31.292  9681  9681 E AndroidRuntime: 	at com.gluonhq.helloandroid.MainActivity.surfaceCreated(MainActivity.java:104)
10-20 15:05:31.292  9681  9681 E AndroidRuntime: 	at android.view.SurfaceView.updateSurface(SurfaceView.java:1153)

The native image produced for my Linux machine still runs without problems using this build.

[makingthematrix]

@taranion
This is a Gluon Substrate issue. I was able to fix it locally by adding dummy methods to the Android launcher and compiling my own plugin, but it might not be the best solution for more complex applications. Please take a look at gluonhq/substrate#1000 (and maybe leave a comment there that you're also interested in solving this problem).

[H-Lo]

Oh! Yesterday I filed a bug about this: oracle/graal#6729
@makingthematrix Adding dummy methods didin't help because my graphics were gone and all I got is a black blank screen.