I am stuck at a strange problem, pretty strange!!

Problem : In the following project, a native method is called from java android using JNI call. Whenever the native method returns, the android activity restarts (oncreate callback method is called again). I confirmed this using a Log inside the "oncreate()". It all results into a recursion!! why??

Please help :(

JAVA CODE

   public class Brahma extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.brahma);
    Log.v("Sumit","on create called");
    TextView text=(TextView)findViewById(R.id.textView);
    ImageView img=(ImageView)findViewById(R.id.imageView);
    Mat inputFrame= new Mat();
    String str =JNIMessage(inputFrame.getNativeObjAddr());
    text.setText(str);

    Bitmap bmp = Bitmap.createBitmap(inputFrame.cols(), inputFrame.rows(),    
                                             Bitmap.Config.ARGB_8888);
        Utils.matToBitmap(inputFrame, bmp);
    img.setImageBitmap(bmp);


}


public static native String JNIMessage(long l);

static 
{
    if (!OpenCVLoader.initDebug()) 
    {
        // Handle initialization error
    } else
        System.loadLibrary("brahma");
}

}

NATIVE CODE

  using namespace std;
  using namespace cv;

  extern "C"
  {
 JNIEXPORT jstring JNICALL Java_com_example_brahma_Brahma_JNIMessage(JNIEnv* , jobject, jlong);

 JNIEXPORT jstring JNICALL Java_com_example_brahma_Brahma_JNIMessage(JNIEnv* env, jobject      
  thiz,jlong addr)
  {
   static int i=0;
   char buffer[100];
   sprintf(buffer, "native function called : time : %d", i++);
       __android_log_print(ANDROID_LOG_INFO, "Sumit", buffer);
   Mat& frame  = *(Mat*)addr;
       VideoCapture cap(0); // open the default camera
   cap>>frame;
   return env->NewStringUTF("Success");

  }

   }