Android控件之ListView探究一

在android开发中ListView是比较常用的组件,它以列表的形式展示具体内容,并且能够根据数据的长度自适应显示。

main.xml布局文件

   
   
<? xml version = " 1.0 " encoding = " utf-8 " ?> < LinearLayout android:id = " @+id/LinearLayout01 " android:layout_width = " fill_parent " android:layout_height = " fill_parent " xmlns:android = " http://schemas.android.com/apk/res/android " > < ListView android:layout_width = " wrap_content " android:layout_height = " wrap_content " android:id = " @+id/MyListView " > </ ListView > </ LinearLayout >

my_listitem.xml布局文件

   
   
<? xml version = " 1.0 " encoding = " utf-8 " ?> < LinearLayout android:layout_width = " fill_parent " xmlns:android = " http://schemas.android.com/apk/res/android " android:orientation = " vertical " android:layout_height = " wrap_content " android:id = " @+id/myListItem " android:paddingBottom = " 3dip " android:paddingLeft = " 10dip " > < TextView android:layout_height = " wrap_content " android:layout_width = " fill_parent " android:id = " @+id/itemTitle " android:textSize = " 20dip " > </ TextView > < TextView android:layout_height = " wrap_content " android:layout_width = " fill_parent " android:id = " @+id/itemText " > </ TextView > </ LinearLayout >

LsActivity类

   
   
package com.ljq.ls; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import android.app.Activity; import android.os.Bundle; import android.widget.ListView; import android.widget.SimpleAdapter; public class LsActivity extends Activity { private ListView list = null ; public void onCreate(Bundle savedInstanceState) { super .onCreate(savedInstanceState); setContentView(R.layout.main); list = (ListView) findViewById(R.id.MyListView); // 组织数据源 List < HashMap < String, String >> mylist = new ArrayList < HashMap < String, String >> (); for ( int i = 0 ;i < 10 ;i ++ ) { HashMap < String, String > map = new HashMap < String, String > (); map.put( " itemTitle " , " This is Title " ); map.put( " itemText " , " This is text " ); mylist.add(map); } // 配置适配器 SimpleAdapter adapter = new SimpleAdapter( this , mylist, // 数据源 R.layout.my_listitem, // 显示布局 new String[] { " itemTitle " , " itemText " }, // 数据源的属性字段 new int [] {R.id.itemTitle,R.id.itemText}); // 布局里的控件id // 添加并且显示 list.setAdapter(adapter); } }

运行结果

Android控件之ListView探究一

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