ListView的嵌套，ExpandableListActivity和SimpleExpandableListAdapter

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如图实现ListView的嵌套

第一步：在布局文件当中声明ExpandableListActivity控件：

main.xml

<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=".MainActivity" >    <ExpandableListView        android:id="@+id/android:list"        android:layout_width="fill_parent"        android:layout_height="fill_parent"        android:drawSelectorOnTop="false" >    </ExpandableListView>    <TextView        android:id="@+id/android:empty"        android:layout_width="fill_parent"        android:layout_height="fill_parent"        android:text="No data" /></RelativeLayout>

第二步：在布局文件当中声明group的样式：

group.xml

<?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:paddingBottom="10px"        android:paddingLeft="60px"        android:paddingTop="10px"        android:text="No data"        android:textSize="26sp" /></LinearLayout>

第三步:在布局文件当中声明子项的样式：

child.xml

<?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:paddingBottom="50px"        android:paddingLeft="50px"        android:paddingTop="50px"        android:text="No data"        android:textSize="20sp" /></LinearLayout>

第四步：创建一个Actuvity,继承ExpandableListActivity:

public class MainActivity extends ExpandableListActivity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);}

第五步：在MainActivity.java里写入监听器，写入ListView

package com.example.acti_02_03_expandable;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import android.os.Bundle;import android.os.Handler;import android.R.string;import android.app.Activity;import android.app.ExpandableListActivity;import android.view.Menu;import android.widget.SimpleAdapter;import android.widget.SimpleExpandableListAdapter;public class MainActivity extends ExpandableListActivity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);// 定义一个List，该List对象为一级条目提供数据List<Map<String, String>> groups = new ArrayList<Map<String, String>>();Map<String, String> groups1 = new HashMap<String, String>();groups1.put("group", "group1");Map<String, String> groups2 = new HashMap<String, String>();groups2.put("group", "group2");groups.add(groups1);groups.add(groups2);// 定义一个List，该List对象为第一个一级条目提供二级条目的数据List<Map<String, String>> chlidList1 = new ArrayList<Map<String, String>>();Map<String, String> chlid1Data1 = new HashMap<String, String>();chlid1Data1.put("child", "child1Data1");Map<String, String> chlid1Data2 = new HashMap<String, String>();chlid1Data2.put("child", "child1Data2");chlidList1.add(chlid1Data1);chlidList1.add(chlid1Data2);List<Map<String, String>> chlidList2 = new ArrayList<Map<String, String>>();Map<String, String> chlid2Data1 = new HashMap<String, String>();chlid2Data1.put("child", "child2Data1");Map<String, String> chlid2Data2 = new HashMap<String, String>();chlid2Data2.put("child", "child1Data2");chlidList2.add(chlid2Data1);chlidList2.add(chlid2Data2);List<List<Map<String, String>>> childs = new ArrayList<List<Map<String, String>>>();childs.add(chlidList1);childs.add(chlidList2);// SimpleExpandableListAdapter(context, groupData, expandedGroupLayout,// collapsedGroupLayout, groupFrom, groupTo, childData, childLayout,// childFrom, childTo)//1.context//2.一级条目的数据//3.用来设置一级条目样式的布局文件//4.指定一级条目的key//5.指定一级条目数据显示控件的id//6.指定二级条目的数据//7.用来设置二级条目样式的布局文件//8.指定二级条目数据的key//9.指定二级条目数据显示控件的idSimpleExpandableListAdapter 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);}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.main, menu);return true;}}

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