游戏中如何调用android 代码

Creator 2.x
#1

var className = “org/cocos2dx/javascript/AppActivity”;
var methodName = “exitGame”;
var methodSignature = “()V”;
jsb.reflection.callStaticMethod(className, methodName, methodSignature);

appActivity加了 对应的方法，但无效

#2

哪位大神指导下，很急

#3

官方例子里：
onClick: function () {
var className = “org/cocos2dx/javascript/AppActivity”;
var methodName = “showAlertDialog”;
var methodSignature = “(Ljava/lang/String;Ljava/lang/String;)V”;
jsb.reflection.callStaticMethod(className, methodName, methodSignature, “Title”, “Native Call Test”);
}
可以调起安卓弹出框，我报jsb is not defined，是缺少什么吗？

#4

cc.director.end();谁说这个可以的？

#5

本来就没定义啊 JNI