cocos2d-x 2.2.6中c++通过JNI与java互调

1.HelloCpp.java

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 all copies or substantial portions of the Software.

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 THE SOFTWARE.
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 package org.cocos2dx.hellocpp;

 import org.cocos2dx.lib.Cocos2dxActivity;

 import android.app.AlertDialog;
 import android.content.DialogInterface;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.Message;

 public class HelloCpp extends Cocos2dxActivity{
     static
     {
          System.loadLibrary("hellocpp");
     }
     //java调用c++
     public static native void javaToC();

     private static AlertDialog mDialog = null;

     protected void onCreate(Bundle savedInstanceState){
         super.onCreate(savedInstanceState);
          mDialog = new AlertDialog.Builder(this).create();
             mDialog.setButton("确定", new AlertDialog.OnClickListener() {
                 @Override
                 public void onClick(DialogInterface dialog, int which) {
                     HelloCpp.this.finish();
                 }
             });

             mDialog.setButton2("取消", new AlertDialog.OnClickListener() {
                 @Override
                 public void onClick(DialogInterface dialog, int which) {
                 }
             });
             mDialog.setButton3("HelloC", new AlertDialog.OnClickListener()
             {
                 @Override public void onClick(DialogInterface dialog, int which) {
                      // Java调用c代码
                      HelloCpp.this.javaToC();
                 }
             });

     }

    //c++会传入string[]然后调用c++此方法 此方法再调用下面handler方法
     public static void sayHelloCToJava(String[] str){
         Message mes = new Message();
         mes.obj = str;
         mHandler.sendMessage(mes);
     }

     private static Handler mHandler = new Handler(new Handler.Callback()
     {
         @Override
         public boolean handleMessage(Message msg) {
         String[] str = (String[])msg.obj;
         mDialog.setTitle(str[0]);
         mDialog.setMessage(str[1]);
         mDialog.show();
         return true;
         }
     });
 }

2.main.cpp

#include "AppDelegate.h"
#include "platform/android/jni/JniHelper.h"
#include <jni.h>
#include <android/log.h>
#include "cocos2d.h"

#define  LOG_TAG    "main"
#define  LOGD(...)  __android_log_print(ANDROID_LOG_DEBUG,LOG_TAG,__VA_ARGS__)

using namespace cocos2d;

extern "C"
{

jint JNI_OnLoad(JavaVM *vm, void *reserved)
{
    JniHelper::setJavaVM(vm);

    return JNI_VERSION_1_4;
}
//java native 调用c++的方法
/* 命名规则：Java_Java的包名_类名*/
void Java_org_cocos2dx_hellocpp_HelloCpp_javaToC()
{
    CCLog("hello java , i'm c");
}

void Java_org_cocos2dx_lib_Cocos2dxRenderer_nativeInit(JNIEnv*  env, jobject thiz, jint w, jint h)
{
    if (!CCDirector::sharedDirector()->getOpenGLView())
    {
        CCEGLView *view = CCEGLView::sharedOpenGLView();
        view->setFrameSize(w, h);

        AppDelegate *pAppDelegate = new AppDelegate();
        CCApplication::sharedApplication()->run();
    }
    else
    {
        ccGLInvalidateStateCache();
        CCShaderCache::sharedShaderCache()->reloadDefaultShaders();
        ccDrawInit();
        CCTextureCache::reloadAllTextures();
        CCNotificationCenter::sharedNotificationCenter()->postNotification(EVENT_COME_TO_FOREGROUND, NULL);
        CCDirector::sharedDirector()->setGLDefaultValues();
    }

#if(CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID)
//    typedef struct JniMethodInfo_
//    {
//        JNIEnv *    env;
//        jclass      classID;
//        jmethodID   methodID;
//    } JniMethodInfo;

        //c++调用java包org/cocos2dx/hellocpp/HelloCpp类中的sayHelloCToJava()方法
       JniMethodInfo info;
       if(JniHelper::getStaticMethodInfo(info , "org/cocos2dx/hellocpp/HelloCpp" , "sayHelloCToJava" , "([Ljava/lang/String;)V"))
       {
           jclass str_cls = info.env->FindClass("java/lang/String");
           jstring str1 = info.env->NewStringUTF("I'm a titile");
           jstring str2 = info.env->NewStringUTF("this is the info");
           jobjectArray arrs = info.env->NewObjectArray( , str_cls , );
           info.env->SetObjectArrayElement(arrs ,  , str1);
           info.env->SetObjectArrayElement(arrs ,  , str2);
           info.env->CallStaticVoidMethod(info.classID , info.methodID , arrs);
       }
   #endif
}

}

效果图

同时后台会打印

http://www.it165.net/pro/html/201305/5914.html

http://www.zaojiahua.com/using-jni.html