Exception loading pocketsphinx_jni while running PocketSphinxDemo on Android device

Question

I've been trying to get the Pocketsphinx demo for Android running on a device for a couple days now. Whenever I try to run the demo, however, I get this error in LogCat:

FATAL EXCEPTION: main
java.lang.ExceptionInInitializerError
    at java.lang.Class.newInstanceImpl(Native Method)

then a bunch of more errors, but the important last one is

    at edu.cmu.pocketsphinx.demo.PocketSphinxDemo.<clinit>(PocketSphinxDemo.java.18)

Line 18 in PocketSphinxDemo.java is

System.loadLibrary("pocketsphinx_jni");

When I go to the pocketsphinx_jni folder, located in /PocketSphinxAndroidDemo/obj/local/armeabi/objs-debug, it appears to be empty. I am running ubuntu, if that is at all relevant. Is there anything that should be in this folder? What is causing this error? Any sort of answer is greatly appreciated.

Answer 1

When I go to the pocketsphinx_jni folder, located in /PocketSphinxAndroidDemo/obj/local/armeabi/objs-debug, it appears to be empty.

System.loadLibrary doesn't load a folder, it loads a library. libpocketsphinx_jni.so is a library built with ndk-build during the build process. objs-debug/pocketsphinx_jni is a temporary folder used to build this library, its supposed to contain temporary files. The library itself must be located in Demo/libs/armeabi/ libpocketsphinx_jni.so

Is there anything that should be in this folder?

In this particular folder you should have files like pocketsphinx_wrap.o.d. Those files are created with ndk-build.

What is causing this error?

You didn't run ndk-build or there were errors during ndk-build and you ignored them.