jni的使用(java调用c++)

jni的使用(java调用c++)"/>

jni的使用(java调用c++)

coco2dx与java之间的互调的问题

java调用c++的函数

1.声明java函数   

public class ReqJavaToC{

 public native static void SetAudioState(boolean bState);

}

2.jni/hellocpp下增加一个ReqJavaToC.h, ReqJavaToC.cpp

ReqJavaToC.h,

/* DO NOT EDIT THIS FILE - it is machine generated */
#include <jni.h>
/* Header for class JavaTC */


#ifndef _Included_ReqJavaToC
#define _Included_ReqJavaToC


#endif

ReqJavaToC:

#include "ReqJavaToC.h"
#include "../../Classes/JniMethod.h"
extern "C"
{
int g_product_id = 0;

void Java_com_echashu_game_jpgame_ReqJavaToC_SetAudioState(JNIEnv *, jclass,jboolean bState){
//OnSucceed();
JniMethod::SetAudioState(bState);
}


}

2.把cpp添加到android.mk中

c++调用java的函数

1.通过发消息

public class ShowPayHelper {
private static Handler mHandler;


public static void init(Handler handler) {


ShowPayHelper.mHandler = handler;
}


public static void PayMon(int i) {
Message msg = mHandler.obtainMessage();

msg.what = JPGame.PAY_TYPE_ONE;
msg.sendToTarget();
}

}

2. 在activity中添加消息接收

Handler aHandler = new Handler() {
public void handleMessage(android.os.Message msg) {
switch (msg.what) {
case PAY_TYPE_ONE:
//order(context, PAYCODE_ONE, mListener);         
break;

}}}

3.

#if (CC_TARGET_PLATFORM==CC_PLATFORM_ANDROID)
JniMethodInfo minfo;
bool isHave = JniHelper::getStaticMethodInfo(minfo,"com/echashu/ShowPayHelper ","PayMon","(I)V");
if (!isHave){
CCLog("jni:�˺������");
}
else
{
CCLog("jni:�˺������");
minfo.env->CallStaticVoidMethod(minfo.classID,minfo.methodID,823);
}
CCLog("jni:����ִ�����");


#endif