ListView及ListAdapter详解
一、AdapterView
1. 简介
An AdapterView is a view whose children are determined by an Adapter.
简单地说就是其子视图是由适配器决定的视图组件
2. 子类
- ListView
- GridView
- Spinner
- Gallery
3. 常用方法
//功能：获取list中指定位置item
getItemAtPosition(int position) //功能：获取list中指定位置item 的id
getItemIdAtPosition(int position) //功能：Sets the adapter that provides the data and the views to represent the data in this widget.
//翻译：设置提供数据和显示数据的视图的适配器
setAdapter(T adapter) //功能：Sets the view to show if the adapter is empty
//翻译：设置当适配器没数据时的视图
setEmptyView(View emptyView) //功能：获取选中的item
getSelectedItem() //功能：获取选中的item的id
long getSelectedItemId() //功能：获取选中的item在数据集中的位置
int getSelectedItemPosition() //功能：Call the OnItemClickListener, if it is defined.
//翻译：调用列表项点击事件，如果定义了的话
performItemClick(View view, int position, long id) //功能：设置当前选中的item
setSelection(int position) //功能：Register a callback to be invoked when this view is clicked.
//翻译：给视图设置点击事件
setOnClickListener(View.OnClickListener l) //功能：Register a callback to be invoked when an item in this AdapterView has been clicked.
//翻译：给适配器视图中的一项设置点击事件
setOnItemClickListener(AdapterView.OnItemClickListener listener) //功能：Register a callback to be invoked when an item in this AdapterView has been clicked and held
//翻译：给适配器视图中的一项设置长按事件
setOnItemLongClickListener(AdapterView.OnItemLongClickListener listener) //功能：Register a callback to be invoked when an item in this AdapterView has been selected.
//翻译：给适配器视图中的一项设置选中事件
setOnItemSelectedListener(AdapterView.OnItemSelectedListener listener) 二、ListView
1. 简介
继承关系
以列表滚动形式显示数据内容，数据内容来自ListAdapter，根据数据长度适应屏幕显示
2. XML属性
| Attribute Name | Description |
|---|---|
| android:divider | Drawable or color to draw between list items. （列表项的分隔线） |
| android:dividerHeight | Height of the divider. （分隔线的高度） |
| android:entries | Reference to an array resource that will populate the ListView. （关联的数组资源 |
