在cocos2dx里访问/互调android里的activity方法/变量

 activity里有如下定义： 

 

public void cppCall_nonStatic_logsth(){  
//非静态方法  
        Log.i("cppCall_nonStatic", "test2~~~~!!!");  
    }  
  
    public static Object cppCall_logsth(){  
//静态方法  
        Log.i("cppCall", "test~~~~!!!");  
        return activity;  
    }  

AppDelegate.cpp里： 
加上预定义（for android）

#if (CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID)  
#include <jni.h>  
#include <JniHelper.h>  
#include <android/log.h>  
  
#if 1  
#define  LOG_TAG    "JniHelper"  
#define  LOGD(...)  __android_log_print(ANDROID_LOG_DEBUG,LOG_TAG,__VA_ARGS__)  
#else  
#define  LOGD(...)   
#endif  
  
#endif  

关键代码片段： 

 

JniMethodInfo minfo;  
    jobject jobj;  
    bool b = JniHelper::getStaticMethodInfo(minfo,   
        "com/loy/puzzles/Puzzles",  //类路径  
        "cppCall_logsth",   //静态方法名  
        "()Ljava/lang/Object;");   //括号里的是参数，后面的是返回值。  
    if (!b) {  
        LOGD("JniHelper::getStaticMethodInfo error...");  
    }else{  
        jobj = minfo.env->CallStaticObjectMethod(minfo.classID, minfo.methodID);  
    }  
      
    JniHelper::getMethodInfo(minfo,  
        "com/loy/puzzles/Puzzles",   
        "cppCall_nonStatic_logsth",   
        "()V");  
    if(!b){  
        LOGD("JniHelper::getMethodInfo error...");  
    }else{  
        LOGD("ready to invoke method...");  
        minfo.env->CallVoidMethod(jobj, minfo.methodID);  
    }  

 

最终LOGCAT打印日志如下： 

12-2 12:46:33.891: D/JniHelper(2008): testing~~~ 
12-2 12:46:33.891: I/cppCall(2008): test~~~~!!! 
12-2 12:46:33.891: D/JniHelper(2008): ready to invoke method... 
12-2 12:46:33.891: I/cppCall_nonStatic(2008): test2~~~~!!! 
12-2 12:46:33.891: D/JniHelper(2008): testing over~~~ 

即表示调用成功。