android------列中列的列表ExpandableListActivity对象

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1、main.xml代码:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context=".Activity01" ><ExpandableListView     android:id="@id/android:list"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:drawSelectorOnTop="false"/>    <TextView        android:id="@id/android:empty"      android:layout_width="fill_parent"       android:layout_height="wrap_content"       android:text="NO data!"/>    <!-- android:drawSelectorOnTop="false"  是选项高亮部分不覆盖文字 --></RelativeLayout>

2、group.xml代码:

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical" >   <TextView         android:id="@+id/groupto"android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:paddingLeft="60px"    android:textSize="26sp"    android:text="NO DATA!"/></LinearLayout>

3、child.xml代码:

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical" >     <TextView         android:id="@+id/childto"android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:paddingLeft="60px"    android:textSize="20sp"    android:text="NO DATA!"/></LinearLayout>

4、Activity01.java代码:
package mars.expandablelistactivity;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import android.os.Bundle;import android.widget.SimpleExpandableListAdapter;import android.app.ExpandableListActivity;public class Activity01 extends ExpandableListActivity {protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);//定义一个List,为一级条目提供数据List<Map<String,String>> groups=new ArrayList<Map<String,String>>();Map<String,String> group1=new HashMap<String,String>();group1.put("group", "group1");Map<String,String> group2=new HashMap<String,String>();group2.put("group", "group2");groups.add(group1);groups.add(group2);//定义一个List,为第一个条目增加二级条目的数据List<Map<String,String>> child1=new ArrayList<Map<String,String>>();Map<String,String> childDate1=new HashMap<String,String>();childDate1.put("child", "childDate1");Map<String,String> childDate2=new HashMap<String,String>();childDate2.put("child", "childDate2");child1.add(childDate1);child1.add(childDate2);//定义一个List,为第二个条目增加二级条目的数据List<Map<String,String>> child2=new ArrayList<Map<String,String>>();Map<String,String> childDate3=new HashMap<String,String>();childDate3.put("child", "childDate1");child2.add(childDate3);//定义一个List,存储所有二级条目的数据List<List<Map<String,String>>> childs=new  ArrayList<List<Map<String,String>>>();childs.add(child1);childs.add(child2);SimpleExpandableListAdapter sela=new SimpleExpandableListAdapter(this,groups,R.layout.group,new String[]{"group"},new int[]{R.id.groupto},childs,R.layout.child,new String[]{"child"},new int[]{R.id.childto});setListAdapter(sela);}}
5、运行效果:

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