Android Ndk (no implementation found for xxxxx)

im trying to implement a native library into my application. But i keep getting errors no matter what i try. So im asking for a little help!

The functions for the lib is stored java-wise in this class:

public class CamLib { static{ System.loadLibrary("leifdev_com_WaveNet_CamLib"); } public static native void getSobel(byte[] frame, int width, int height, IntBuffer diff); } 

And is being loaded in like this:

 CamLib.getSobel(mFrame, mFrameSize.width, mFrameSize.height, mFrameDiff); 

The header file is auto generated by javah and looks like this:

 /* DO NOT EDIT THIS FILE - it is machine generated */ #include <jni.h> #include <string.h> #include <android/log.h> /* Header for class leifdev_com_WaveNet_CamLib */ #ifndef _Included_leifdev_com_WaveNet_CamLib #define _Included_leifdev_com_WaveNet_CamLib #ifdef __cplusplus extern "C" { #endif /* * Class: leifdev_com_WaveNet_CamLib * Method: getSobel * Signature: (J)J */ JNIEXPORT void JNICALL Java_leifdev_com_WaveNet_CamLib_getSobel (JNIEnv *, jclass, jbyteArray , jint , jint , jobject ); #ifdef __cplusplus } #endif #endif 

And the function itself is from a tutorial, so i assume its working, and it looks like this:

 #include "leifdev_com_WaveNet_CamLib.h" #define LOGTAG "Sobel_Native" JNIEXPORT void JNICALL Java_leifdev_com_WaveNet_CamLib_getSobel( JNIEnv *env, jclass c, jbyteArray frame, jint width, jint height, jobject diff) { jboolean framecopy; jint *dbuf = (jint*)((*env)->GetDirectBufferAddress(env, diff)); jbyte *fbuf = (*env)->GetByteArrayElements(env, frame, &framecopy); int x, y, maxx=width-1, maxy=height-1, p=width+1, px, py, ps; for(y=1; y<maxy; y++, p+=2) { for(x=1; x<maxx; x++, p++) { px = fbuf[p+width+1]-fbuf[p+width-1]+fbuf[p+1]+fbuf[p+1]-fbuf[p-1]-fbuf[p-1]+fbuf[p-width+1]-fbuf[p-width-1]; py = fbuf[p-width-1]+fbuf[p-width]+fbuf[p-width]+fbuf[p-width+1]-fbuf[p+width-1]-fbuf[p+width]-fbuf[p+width]-fbuf[p+width+1]; if(px<0) px=-px; if(py<0) py=-py; ps=px+py; if(ps>95) ps=255; if(ps<=95) ps=0; dbuf[p] = (ps<<24)|(ps<<16)|(ps<<8)|ps; } } } 

I am assuming these are the logcat messages of most importance:

 08-02 02:07:17.204: D/dalvikvm(15767): No JNI_OnLoad found in /data/data/leifdev.com/lib/libleifdev_com_WaveNet_CamLib.so 0x41a02998, skipping init 08-02 02:07:17.204: W/dalvikvm(15767): No implementation found for native Lleifdev/com/CamLib;.getSobel ([BIILjava/nio/IntBuffer;)V 08-02 02:07:17.204: D/AndroidRuntime(15767): Shutting down VM 08-02 02:07:17.204: W/dalvikvm(15767): threadid=1: thread exiting with uncaught exception (group=0x40c631f8) 08-02 02:07:17.219: V/Camera-JNI(15767): dataCallback(16, 0x7f5778) 08-02 02:07:17.224: V/Camera-JNI(15767): copyAndPost: off=0, size=1036800 08-02 02:07:17.224: V/Camera-JNI(15767): Allocating callback buffer 08-02 02:07:17.334: E/AndroidRuntime(15767): FATAL EXCEPTION: main 08-02 02:07:17.334: E/AndroidRuntime(15767): java.lang.UnsatisfiedLinkError: getSobel 08-02 02:07:17.334: E/AndroidRuntime(15767): at leifdev.com.CamLib.getSobel(Native Method) 

(Sorry for spelling errors, its getting really late.)

I have been stuck at this stage for a couple of days now, i think it has something to do with using jclass instead of jobject in the native header, but i cant really find any documentation on it. So if any of you black wizards of ndk could help me out, i would be really happy!