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"  

jmethodID MID_InstanceMethodCall_callback;

JNIEXPORT void JNICALL 
Java_InstanceMethodCall_initIDs(JNIEnv *env, jclass cls)
{
    MID_InstanceMethodCall_callback =
        (*env)->GetMethodID(env, cls, "callback", "()V");
}

JNIEXPORT void JNICALL 
Java_InstanceMethodCall_nativeMethod(JNIEnv *env, jobject obj)
{
    printf("In C\n");
    (*env)->CallVoidMethod(env, obj,
                           MID_InstanceMethodCall_callback);
}