[置顶] Android游戏开发cocos2d-x调用Java层代码

通过JNI调用
准备工作：
首先用VS工程导入$cocos2d_Root\cocos2dx\platform\android\jni\JniHelper.h
接着导入$Java\jdk1.6.0_10\include\jni.h
再导入$Java\jdk1.6.0_10\include\win32\jni_md.h
C++层代码
通过JNI调用
准备工作：
首先用VS工程导入$cocos2d_Root\cocos2dx\platform\android\jni\JniHelper.h
接着导入$Java\jdk1.6.0_10\include\jni.h
再导入$Java\jdk1.6.0_10\include\win32\jni_md.h
C++层代码
在点击事件中添加如下代码

#if(CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID)//条件编译语句
        {
                const char *message = "坑爹";//需要传递到Java层的字符串
                JniMethodInfo methodInfo;
                bool isHave = JniHelper::getStaticMethodInfo(methodInfo,
                        "com/kengdie/test/Test",//需要调用的Java文件
                        "showMessageFromNative",//调用的方法名
                        "(Ljava/lang/String;)V");//参数
                if(isHave){
                        CCLog("the showMessage method is exits");
                        jstring StringArg = methodInfo.env->NewStringUTF(message);
                        methodInfo.env->CallStaticVoidMethod(methodInfo.classID, methodInfo.methodID, StringArg);
                }else{
                        CCLog("the showMessage method is not exits");
                }
        }
#endif

Java层代码

public class Test extends Cocos2dxActivity{
        ......
        private static LinkUp context;
        ......
        protected void onCreate(Bundle savedInstanceState){
                ......
                context = this;
                ......
        }
        public static void showMessageFromNative(String message){                    Message msg = new Message();
                   msg.what = 1;
                    msg.obj = message;
                    handler.sendMessage(msg);
        }
        static Handler handler = new Handler(){
                    @Override
                public void handleMessage(android.os.Message msg) {
                     switch (msg.what) {
                        case 1:
                                String message = (String) msg.obj;
                                Toast.makeText(context, message, Toast.LENGTH_SHORT).show();
                                break;
                        default:
                                break;
                        }
             };
     };
}

注：C++代码需要保存为UTF-8