cocos2d-x 中java调用c/c++函数
这个是在JniHelper的基础上添加的,可以对比者看,java中的函数是backAction,
主要调用的函数
JNIEXPORT void JNICALL Java_org_cocos2dx_Game_JavaHelper_backAction(JNIEnv *env, jobject thiz, jstring key, jstring message)
这个是需要注意的,其他地方就。。。。。
还是上代码,还是代码加调试舒服点。
#ifndef __HELPER_H__ #define __HELPER_H__ #include <iostream> #include "CCLuaStack.h" USING_NS_CC; namespace MGame { class PlatformHelper { public: static PlatformHelper *shared(); // call from cocos2d-x void doAction(const std::string& key, const std::string& message); // register a lua function when doPlatformAction is called void registerPlatformHandler(int handler); // call from java or object-c void backAction(const std::string& key, const std::string& message); protected: PlatformHelper(); CCLuaStack *mLuaStack; int mPlatformCallBackHandler; // call from platform for java or object-c }; } #endif // __HELPER_H__ #include "PlatformHelper.h" #include "cocos2d.h" #include "CCLuaEngine.h" //===================== android ====================== #define ANDROID_CLASS_NAME "org/cocos2dx/Game/JavaHelper" #define ANDROID_FUNCTION_NAME "doAction" #define ANDROID_PARAM_TYPE "(Ljava/lang/String;Ljava/lang/String;)V" #if (CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID) #include <jni.h> #include "platform/android/jni/JniHelper.h" #include <android/log.h> extern "C" { JNIEXPORT void JNICALL Java_org_cocos2dx_Game_JavaHelper_backAction(JNIEnv *env, jobject thiz, jstring key, jstring message) { const char *tmpKey = env->GetStringUTFChars(key, 0); std::string strKey(tmpKey); env->ReleaseStringUTFChars(key, tmpKey); const char *tmpMessage = env->GetStringUTFChars(message, 0); std::string strMessage(tmpMessage); env->ReleaseStringUTFChars(message, tmpMessage); MGame::PlatformHelper::shared()->backAction(strKey, strMessage); } } #endif
namespace MGame
{
USING_NS_CC;
static PlatformHelper * s_PlatformHelperShared = NULL;
//-------------------------------------------------
PlatformHelper *PlatformHelper::shared()
{
if (s_PlatformHelperShared == NULL)
s_PlatformHelperShared = new PlatformHelper;
return s_PlatformHelperShared;
}
//-------------------------------------------------
PlatformHelper::PlatformHelper()
: mPlatformCallBackHandler(0)
{
CCLuaEngine *pEngine = CCLuaEngine::defaultEngine();
mLuaStack = pEngine->getLuaStack();
}
//-------------------------------------------------
void PlatformHelper::doAction(const std::string& key, const std::string& message)
{
// android
#if (CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID)
USING_NS_CC;
JniMethodInfo methodInfo;
bool isHave = JniHelper::getStaticMethodInfo(methodInfo, ANDROID_CLASS_NAME,
ANDROID_FUNCTION_NAME,
ANDROID_PARAM_TYPE);
if (isHave)
{
jstring key_arg = methodInfo.env->NewStringUTF(key.c_str());
jstring msg_arg = methodInfo.env->NewStringUTF(message.c_str());
methodInfo.env->CallStaticVoidMethod(methodInfo.classID, methodInfo.methodID, key_arg, msg_arg);
}
else
{
}
#else
#endif
}
//--------------------------------------------
void PlatformHelper::registerPlatformHandler(int handler)
{
mPlatformCallBackHandler = handler;
}
//--------------------------------------------
void PlatformHelper::backAction(const std::string& key, const std::string& message)
{
if (mPlatformCallBackHandler > 0)
{
mLuaStack->pushString(key.c_str());
mLuaStack->pushString(message.c_str());
mLuaStack->executeFunctionByHandler(mPlatformCallBackHandler, 2);
mLuaStack->clean();
}
}
}
java部分
package org.cocos2dx.Game;
import android.content.Context;
import android.os.Handler;
import android.os.Message;
import android.widget.Toast;
public class JavaHelper {
private static Context s_context;
/**
* 初始化内容信息
* @param context
*/
public static void initContext(Context context){
s_context = context;
}
/**
* 这里是java调用cocos2d-x的地方
* @param key
* @param message
*/
public static native void backAction(final String key, final String message);
public static void doAction(String key, String message){
Message msg = new Message();
msg.what = Integer.parseInt(key);
msg.obj = message;
handler.sendMessage(msg);
}
static Handler handler = new Handler(){
public void handleMessage(Message msg){
switch(msg.what){
}
String message = (String)msg.obj;
Toast.makeText(s_context, message, Toast.LENGTH_SHORT).show();
backAction(msg.what + "", message);
}
};
}
// --我这里使用了lua回调形式,所有添加了void registerPlatformHandler(int handler);
这个的话可以参考下tolua++我这里使用cocos2d-x -2.1.4的版本,虽然比较新,bug也可能有不少,
但是嘛,不少功能需要,自己写费事费力,也不一定到达效果,出了问题在处理了,只能。