android setOnClickListener 回调函数理解

1.模拟java View类：

package com.test;/** * Created by dandan on 15-2-7. */public class View {    /**设置默认ID**/    public static final int NO_ID = -1;    /**设置每个控件的ID用于被子类覆盖**/    public int mID = NO_ID;    /**保存点击回调函数**/    public OnClicklistener mOnClicklistener;    public interface OnClicklistener {        void onClick(View view);    };    void setOnClicklistener(OnClicklistener onClicklistener) {        this.mOnClicklistener = onClicklistener;    };    public int getId(){        return mID;    };}

2.模拟android控件继承View

package com.test;/** * Created by dandan on 15-2-7. */public class AnimationButton extends  View{    /**     * 按钮子类中模拟用户点击的方法     *     * **/    public void moniClick(){        this.mID = 20;        OnClicklistener clicklistener = this.mOnClicklistener;        clicklistener.onClick(this);    }}

3.模拟客户端使用AnimationButton控件

package com.test;/** * Created by dandan on 15-2-7. */public class MainActivity {    public static void main(String[] args) {        AnimationButton animationButton = new AnimationButton();        animationButton.setOnClicklistener(new View.OnClicklistener() {            @Override            public void onClick(View view) {                System.out.print(view.getId());            }        });

//模拟用户点击按钮        animationButton.moniClick();    }}

更多相关文章

随机推荐