cocos2dx java调用c++ -- 字符串传递

1、Java_org_cocos2dx_lib_Cocos2dxRenderer.cpp

 JNIEXPORT void JNICALL Java_org_cocos2dx_lib_Cocos2dxRenderer_nativeInsertText(JNIEnv* env,jobject thiz,jstring text) {
        const char* pszText = env->GetStringUTFChars(text,NULL);
        cocos2d::CCIMEDispatcher::sharedDispatcher()->dispatchInsertText(pszText,strlen(pszText));
        env->ReleaseStringUTFChars(text,pszText);
    }

2、Java_org_cocos2dx_lib_Cocos2dxHelper.cpp

JNIEXPORT void JNICALL Java_org_cocos2dx_lib_Cocos2dxHelper_nativeSetApkPath(JNIEnv*  env,jstring apkPath) {
        g_apkPath = JniHelper::jstring2string(apkPath);
    }

static string jstring2string_(jstring jstr)
    {
        if (jstr == NULL)
        {
            return "";
        }
        
        JNIEnv *env = 0;

        if (! getEnv(&env))
        {
            return 0;
        }

        const char* chars = env->GetStringUTFChars(jstr,NULL);
        string ret(chars);
        env->ReleaseStringUTFChars(jstr,chars);

        return ret;
    }

总结：

java调用C++传递string类型的参数时，常常需要在C++端转化为C类型的字符串，可以调用

GetStringUTFChars

函数进行转化，但是别忘了调用

ReleaseStringUTFChars