本文为通过自定义列表适配器定义ListView，以上文为基础，基于ListActivity。
定义列表项布局，包含一个图片显示，标题和描述
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="80dip">
<ImageView
android:id="@+id/image"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<LinearLayout
android:orientation="vertical"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_marginLeft="10dip"
android:layout_marginRight="10dip">
<TextView
android:id="@+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/description"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
</LinearLayout>
为了使视图显示数据，必须自定义适配器。ListView每一个列表项显示的是自定义的Model数据，选择继承BaseAdapter<T>，T为自定义Model
model类内容
public class Model
{
public string Name {
get;
set;
}public string Description {
get;
set;
}public int Image {
get;
set;
}
}
适配器类需要实现两个方法和两个属性：
Count属性、T类型的this 属性、GetItemId方法、GetView方法。
this属性返回指定索引对应的对象数据。
自定义ModelListAdapter代码：
class ModelListAdapter :BaseAdapter<Model>
{
public List<Model> Models {
get;
set;
}public ModelListAdapter(List<Model> models)
{
Models = models;
}#region implemented abstract members of BaseAdapter
public override long GetItemId (int position)
{
return position;
}public override View GetView (int position, View convertView, ViewGroup parent)
{
//从数据源中获取当前位置对应的对象
var item = Models [position];
//避免重复创建和销毁列表项视图
if (convertView==null) {
LayoutInflater inflater = Application.Context.GetSystemService ("layout_inflater") as LayoutInflater;
convertView = inflater.Inflate (Resource.Layout.CustomItem,null);
}var image = convertView.FindViewById<ImageView> (Resource.Id.image);
var title = convertView.FindViewById<TextView> (Resource.Id.title);
var description = convertView.FindViewById<TextView> (Resource.Id.description);image.SetImageResource (item.Image);
title.Text = item.Name;
description.Text = item.Description;return convertView;
}public override int Count {
get {
return Models.Count;
}
}#endregion
#region implemented abstract members of BaseAdapter
public override Model this [int index] {
get {
return Models [index];
}
}#endregion
}
最后一步，将LiatActivity的ListAdapter赋值为我们自定义的适配器
var models = new List<Model>{
new Model(){ Name="Name",Description="Description",Image = Resource.Drawable.Icon},
new Model(){ Name="Name",Description="Description",Image = Resource.Drawable.Icon},
new Model(){ Name="Name",Description="Description",Image = Resource.Drawable.Icon},
new Model(){ Name="Name",Description="Description",Image = Resource.Drawable.Icon},
new Model(){ Name="Name",Description="Description",Image = Resource.Drawable.Icon},
new Model(){ Name="Name",Description="Description",Image = Resource.Drawable.Icon}
};
this.ListAdapter = new ModelListAdapter (models);
自定义适配器，我们可以进行更灵活的处理。在GetView方法中执行更多的操作，如果只是进行简单的自定义列表样式，可以通过SimpleAdapter快速完成操作。
IList<IDictionary<string,object>> items = new JavaList<IDictionary<string,object>> ();
var item1 = new JavaDictionary<string,object> ();
item1.Add ("name","show name");
item1.Add("description","description");
item1.Add ("image",Resource.Drawable.Icon);var item2 = new JavaDictionary<string,object> ();
item2.Add ("name","show name");
item2.Add("description","description");
item2.Add ("image",Resource.Drawable.Icon);items.Add (item1);
items.Add (item2);this.ListAdapter = new SimpleAdapter (this,items,Resource.Layout.CustomItem,
new string[]{"name","description","image"},new int[]{Resource.Id.title,Resource.Id.description,Resource.Id.image});
items为定义的数据源k，定义SimpleAdapter传入参数即可。其中string[]
中定义的值必须等于Dictionary中key的值，string[] 和int[] 两个参数表示from string[] to
int[]。即每个string[]中的值作为key，取得Dictionary中的值，赋值给int[] 中id所对应的视图。
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