Model initialization error with minifyEnabled

[prechtelm]

Hi, when initializing the Model with StorageService.unpack(), I receive the following error:

    java.lang.UnsatisfiedLinkError: Can't obtain peer field ID for class com.sun.jna.Pointer
        at com.sun.jna.Native.initIDs(Native Method)
        at com.sun.jna.Native.<clinit>(:248)
        at com.sun.jna.Native.H(:1773)
        at org.vosk.LibVosk.<clinit>(:16)
        at org.vosk.LibVosk.vosk_model_new(Native Method)
        at org.vosk.Model.<init>(:10)
        at dy.k.i(:56)
        at dy.k.c(Unknown Source:0)
        at dy.h.run(Unknown Source:12)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
        at java.lang.Thread.run(Thread.java:919)](url)

The model is stored in the asset folder as described in the demo, everything runs smoothly when not using minifyEnabled option. Following versions are used, proguard file is updated as follows.

    implementation 'net.java.dev.jna:jna:5.11.0@aar'
    implementation (group: 'com.alphacephei', name: 'vosk-android', version: '0.3.37') {
        exclude group: 'net.java.dev.jna', module: 'jna'
    }

-keep class com.sun.jna.** { *; }
-keepclassmembers  class com.sun.jna.** {*;}

Any idea what could cause this issue or fix it?

[nshmyrev]

https://stackoverflow.com/questions/10557146/how-to-tell-proguard-to-avoid-obfuscating-jna-library-classes suggests also

    -keep class * implements com.sun.jna.** { *; }

probably it should help

[prechtelm]

That didn't fix the crash. Any other idea?

[nshmyrev]

Go inside the APK and check the class names are kept inact. If names are obfuscated, check that rules file actually apply.

[prechtelm]

oh boy, the dubug build was not using the proguard rules file. Thanks for your help!