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文字
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。