Java 回调

接口类

package com.button;

/**
 * Created by zhangminjie on 15/3/19.
 */
public interface Action {

    void click();
}

按钮类

package com.button;

/**
 * Created by zhangminjie on 15/3/19.
 */
public class Button {


    private Action action;
    public Button(Action action) {
        this.action = action;
    }

    public void onClick(){
        System.out.println("我要开始点了！！");
        action.click();


    }


}

事件实现类

package com.button;

/**
 * Created by zhangminjie on 15/3/19.
 */
public class Click implements Action {

    @Override
    public void click() {
        new Thread(){
            @Override
            public void run() {
                try {
                    sleep(1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                System.out.println("被点到了。。。");
            }
        }.start();
        goPlay();


    }

    public void goPlay() {
        System.out.println("还没点啊，先去玩会！");
    }
}

测试类

package com.button;

/**
 * Created by zhangminjie on 15/3/19.
 */
public class TestButton {
    public static void main(String[] args) {
        Action action = new Click();
        Button button = new Button(action);
        button.onClick();
    }
}

打印：

我要开始点了！！
还没点啊，先去玩会！
被点到了。。。

定义好动作接口，按钮类调用接口方法。

实现接口方法，即可自定义单击动作的回调方法。