1．掌握用户按键事件处理方法 2．进一步掌握Sprite类 3．掌握碰撞检测的处理过程 4．实现英雄行走功能-1. Master user key event handling method 2. Further understand Sprite Class 3. Master the process of collision detection 4. The realization of the hero walking

这个小程序是为了放到真正手机上来检测手机按键键值的，虽然简单，但很有效！-This little program is to put a real mobile phone to detect the phone keypad keys, though simple, but very effective!