www.pudn.com > jniexamples.zip > InstanceMethodCall.c

#include 
#include 
#include "InstanceMethodCall.h"  

JNIEXPORT void JNICALL 
Java_InstanceMethodCall_nativeMethod(JNIEnv *env, jobject obj)
{
    jclass cls = (*env)->GetObjectClass(env, obj);
    jmethodID mid = 
        (*env)->GetMethodID(env, cls, "callback", "()V");
    if (mid == NULL) {
        return; /*  method not found */
    }
    printf("In C\n");
    (*env)->CallVoidMethod(env, obj, mid);
}