no field with name='mNativeData' signature='I' in class Lcom/googlecode/tesseract/android/TessBaseAPI

[mensoif]

I tried to rebuild an android app wich contains tess-two as library (https://github.com/luklanis/esr-scanner). When using as is, I get this error

Process: ch.luklanis.esscan, PID: 3603
java.lang.NoSuchFieldError: no field with name='mNativeData' signature='I' in class Lcom/googlecode/tesseract/android/TessBaseAPI;
at com.googlecode.tesseract.android.TessBaseAPI.nativeClassInit(Native Method)
at com.googlecode.tesseract.android.TessBaseAPI.(TessBaseAPI.java:47)
at ch.luklanis.esscan.CaptureActivity.initOcrEngine(CaptureActivity.java:545)
at ch.luklanis.esscan.CaptureActivity.onResume(CaptureActivity.java:198)
at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1192)
at android.app.Activity.performResume(Activity.java:5310)
at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2778)
at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2817)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2250)
at android.app.ActivityThread.access$800(ActivityThread.java:135)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5017)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
at dalvik.system.NativeStart.main(Native Method)

When reverting commit bc931c9 (private long mNativeData; changed to private int mNativeData;)

This happens on the android emulator arm cpu/abi, but also on my phone android 4.4 (Qualcomm 8228)

I used the latest ndk available android-ndk-r10e-linux-x86_64.bin

Thanks

[rmtheis]

Looks like the esr-scanner project uses a pre-compiled version of tess.so that works with an older version of TessBaseAPI.java.

I think the best solution is to re-build the *.so libraries using the tess-two build instructions and replace them for the ones in the native-libs.jar file in the esr-scanner project. (You can create a jar file by creating a zip file and renaming its extension.)

Alternately, you can roll back the tess-two code to an old version that pre-dates the commit that added the 64-bit support and use that.

[mensoif]

Thanks a lot for supporting a newb like me.

Regards.
Gerard