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テキスト


SpinnerAdapter

翻译时间:2010-11-03

版本:Android 2.2 r1

 

结构

继承关系

public interface SpinnerAdapter extends Adapter

        

android.widget. SpinnerAdapter

 

子类及间接子类

直接子类

         ArrayAdapter<T>, BaseAdapter, CursorAdapter, ResourceCursorAdapter, SimpleAdapter, SimpleCursorAdapter

 

类概述

扩展自Adapter 的适配器是在Spinner与数据之间的一座桥梁。一个Spinner Adapter允许定义两个不同的视图:一是在Spinner上显示数据,另一个是当Spinner按下时在下拉列表里显示数据。

 

公共方法

public abstract View getDropDownView (int position, View convertView, ViewGroup parent)

获得一个在指定位置上显示下拉弹出数据的视图。

参数

       position  项目视图的索引

convertView  如果可能旧有的视图重新使用。注解:在使用之前应该检查这个视图不是空的并且类型合适。如果转换视图显示正确的数据是不可能的,这个方法能够创建一个新的视图

parent    视图最终将依附的父对象

返回值

一个对应指定位置的数据的视图


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