ksnowlv

回顾过去,总结以往;立足现在,铭记当下;技术为主,笔记而已.

Android-jni-demo

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1.创建app/src/main/jniLibs目录

2.把so库拷贝到jniLibs目录。

3.JavaCallJNI内容如下

···objective-c

public class JavaCallJNI {

static  {
    System.loadLibrary("JNITest");
}


public static native int showValue(int value);

}

···

4.com_ksnowlv_hellojniforjava_JavaCallJNI.h内容如下：

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/* DO NOT EDIT THIS FILE - it is machine generated */

#include <jni.h>

/* Header for class com_ksnowlv_hellojniforjava_JavaCallJNI */

#ifndef _Included_com_ksnowlv_hellojniforjava_JavaCallJNI

#define _Included_com_ksnowlv_hellojniforjava_JavaCallJNI

#ifdef __cplusplus

extern "C" {

#endif
/*
 * Class:     com_ksnowlv_hellojniforjava_JavaCallJNI
 * Method:    showValue
 * Signature: (I)I
 */

JNIEXPORT jint JNICALL Java_com_ksnowlv_hellojniforjava_JavaCallJNI_showValue
  (JNIEnv *, jclass, jint);

  #ifdef __cplusplus
}

#endif

#endif

5.com_ksnowlv_hellojniforjava_JavaCallJNI.c内容如下：

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#include "com_ksnowlv_hellojniforjava_JavaCallJNI.h"
#include "PersonExtension.hpp"
#include "JNILog.h"


JNIEXPORT jint JNICALL Java_com_ksnowlv_hellojniforjava_JavaCallJNI_showValue
  (JNIEnv * enc, jclass cls , jint value) {

    LOGI("jni value = %d",value);
  value = value + 1;
  LOGI("jni value +1 = %d",value);
    return value;
  }

6。Android中调用如下：

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  int value =  JavaCallJNI.showValue(1);
  Log.e("#### value ","" + value);

Android

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