请问cocos2d-android怎样自定义精灵?求大神帮助，卡了很久了
//自定义一个精灵类，继承自CCSprite
public class MySprite extends CCSprite{
//构造函数对精灵的图片进行了初始化
public MySprite{
CCSprite.sprite("111.png");
}
}
//自定义了一个类图景层，继承自CCLayer
public class GameLayer extends CCLayer{
MySprite mySprite = new MySprite();
public GameLayer(){
mySprite.setPosition(25, 25);
this.addChild(mySprite);
}
}
运行报错