Android 创建事件监听

一、在自定义的MyView中
1. 定义监听接口

    public interface InterfaceName    {        returnType methodName(Argument list);    }

2.创建监听对象

    private InterfaceName interfaceObject;

3.添加设置监听方法

    public void setInterfaceName(InterfaceName object)    {        this.interfaceObject = object ;    }

4.触发事件处调用

    this.interfaceObject.methodName(Argument list);

5.这样，我们就可以像其他View一样，在Activity等设置监听事件
二、示例
1.自定义创建的菜单按钮，弹出和弹回菜单窗口

import android.app.ActionBar.LayoutParams;import android.content.Context;import android.util.AttributeSet;import android.view.LayoutInflater;import android.view.View;import android.widget.ImageView;import android.widget.PopupWindow;public class MenuBar extends ImageView{    private PopupWindow popupWindow;    public MenuBar(Context context)    {        super(context);    }    public MenuBar(Context context, AttributeSet attrs)    {        super(context, attrs);    }    public void showMenu()    {        LayoutInflater layoutInflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);        View popupView = layoutInflater.inflate(R.layout.slide_menu, null);        popupWindow = new PopupWindow(popupView, LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);        popupWindow.showAsDropDown(this, 0, 0);        //Call onPopupWindowListener.onShow when popupWindow showed         if (onPopupWindowListener != null)        {            onPopupWindowListener.onShow(popupWindow);        }    }    public void dismiss()    {        if (popupWindow != null)        {            popupWindow.dismiss();        }        //Call onPopupWindowListener.onDismiss when popupWindow dismissed        if (onPopupWindowListener != null)        {            onPopupWindowListener.onDismiss(popupWindow);        }    }    //set up popupWindow listener inerface    public interface OnPopupWindowListener    {        /**         * Called when popupWindow showed         * @param popupWindow which popupWindow showed         */        public void onShow(PopupWindow popupWindow);        /**         * Called when popupWindow dismissed         * @param popupWindow which popupWindow dismissed         */        public void onDismiss(PopupWindow popupWindow);    }    private OnPopupWindowListener onPopupWindowListener;    public void setOnPopupWindowListener(OnPopupWindowListener onPopupWindowListener)    {        this.onPopupWindowListener = onPopupWindowListener;    }}

2.Activity中设置监听

//listPopupWindowShowing用于存储所有showing的窗口，方便管理private List<PopupWindow> listPopupWindowShowing=new ArrayList();private MenuBar menubar=new MenuTitleBar(this);menubar.setOnPopupWindowListener(new OnPopupWindowListener()        {            @Override            public void onShow(PopupWindow popupWindow)            {                // TODO Auto-generated method stub                listPopupWindowShowing.add(popupWindow);            }            @Override            public void onDismiss(PopupWindow popupWindow)            {                // TODO Auto-generated method stub                listPopupWindowShowing.remove(popupWindow);            }        });

3.这个例子并不好，之后可能会添加百度推送的例子，这是心血来潮的一篇博客，望海涵。
示例来着于开发中，遇到多出弹出窗口，按返回键依序关闭，还有跳转页面全部关闭等问题，就想到里用list存储窗口对象。可是每次创建都去添加，实在太蠢了，要是有一次忘了就麻烦了。所以就想到了用监听，创建时自动去添加等。