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AdapterView.OnItemSelectedListener

版本：Android 2.3 r1

 

结构

继承关系

public static interface AdapterView.OnItemSelectedListener

 

类概述

定义了当选中视图中的项目时调用的回调函数的接口。

 

公有方法

public abstract void onItemSelected (AdapterView<?> parent, View view, int position, long id)

当选中视图中的项目时执行的回调函数。 实现时如果需要访问与选中条目关联的数据，可以调用 getItemAtPosition(position)。

参数

parent 发生选中事件的 AbsListView。

view    AbsListView 中被选中的视图。

position    视图在一览中的位置（索引）。

id 被点击条目的行 ID。

 

public abstract void onNothingSelected (AdapterView<?> parent)

当视图中的处于选中状态的条目全部消失时执行的回调函数。 启动触控功能或适配器为空都可能导致选中条目消失。

参数

    parent 没有任何选中条目的 AdapterView。

 

补充

       本文由 Android中文在线文档 转换而成。

 
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