instancemethodcall.c

jni java本地接口编程例子原代码,是java调用本地操作系统代码的接口

#include <jni.h>
#include <stdio.h>
#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);
}