ExpandListView--二级列表事例

<span style="font-size:24px;">活动界面public class MainActivity extends Activity {private ExpandableListView el;// 一级列表的列表private List<String> grouplist;// 二级标题的列表private List<List<String>> itemlist;public void getdata() {grouplist = new ArrayList<String>();grouplist.add("我的好友");grouplist.add("我的家人");grouplist.add("我的设备");grouplist.add("同学");grouplist.add("八维同事");grouplist.add("八维市场部");List<String> item = new ArrayList<String>();item.add("好友1");item.add("好友2");List<String> item1 = new ArrayList<String>();item1.add("家人1");item1.add("家人2");List<String> item2 = new ArrayList<String>();item2.add("设备1");item2.add("设备2");List<String> item3 = new ArrayList<String>();item3.add("同学1");item3.add("同学2");List<String> item4 = new ArrayList<String>();item4.add("同事1");item4.add("同事2");List<String> item5 = new ArrayList<String>();item5.add("晋中市场部");item5.add("晋南市场部");itemlist = new ArrayList<List<String>>();itemlist.add(item);itemlist.add(item1);itemlist.add(item2);itemlist.add(item3);itemlist.add(item4);itemlist.add(item5);}@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);getdata();el = (ExpandableListView) findViewById(R.id.el);el.setAdapter(new Myad());// 一级标题的点击事件el.setOnGroupClickListener(new OnGroupClickListener() {@Overridepublic boolean onGroupClick(ExpandableListView parent, View v,int groupPosition, long id) {Toast.makeText(MainActivity.this, "第" + groupPosition + "组被点击",0).show();return false;}});// 二级标题的点击事件el.setOnChildClickListener(new OnChildClickListener() {@Overridepublic boolean onChildClick(ExpandableListView parent, View v,int groupPosition, int childPosition, long id) {Toast.makeText(MainActivity.this,itemlist.get(groupPosition).get(childPosition), 0).show();return false;}});}class Myad implements ExpandableListAdapter {@Overridepublic void registerDataSetObserver(DataSetObserver observer) {// TODO Auto-generated method stub}@Overridepublic void unregisterDataSetObserver(DataSetObserver observer) {// TODO Auto-generated method stub}@Overridepublic int getGroupCount() {// 返回一级标题的个数return grouplist.size();}@Overridepublic int getChildrenCount(int groupPosition) {// 返回一级标题对应的二级标题的个数return itemlist.get(groupPosition).size();}@Overridepublic Object getGroup(int groupPosition) {// TODO Auto-generated method stubreturn null;}@Overridepublic Object getChild(int groupPosition, int childPosition) {// TODO Auto-generated method stubreturn null;}@Overridepublic long getGroupId(int groupPosition) {// TODO Auto-generated method stubreturn 0;}@Overridepublic long getChildId(int groupPosition, int childPosition) {// TODO Auto-generated method stubreturn 0;}@Overridepublic boolean hasStableIds() {// TODO Auto-generated method stubreturn false;}// 得到一级标题的view@Overridepublic View getGroupView(int groupPosition, boolean isExpanded,View convertView, ViewGroup parent) {View view = View.inflate(MainActivity.this, R.layout.group_layout,null);TextView tv_group = (TextView) view.findViewById(R.id.tv_group);tv_group.setText(grouplist.get(groupPosition));return view;}// 得到二级标题的view@Overridepublic View getChildView(int groupPosition, int childPosition,boolean isLastChild, View convertView, ViewGroup parent) {View vv = View.inflate(MainActivity.this, R.layout.group_item, null);TextView tv_item = (TextView) vv.findViewById(R.id.tv_item);tv_item.setText(itemlist.get(groupPosition).get(childPosition));return vv;}@Overridepublic boolean isChildSelectable(int groupPosition, int childPosition) {// TODO Auto-generated method stubreturn true;}@Overridepublic boolean areAllItemsEnabled() {// TODO Auto-generated method stubreturn false;}@Overridepublic boolean isEmpty() {// TODO Auto-generated method stubreturn false;}@Overridepublic void onGroupExpanded(int groupPosition) {// TODO Auto-generated method stub}@Overridepublic void onGroupCollapsed(int groupPosition) {// TODO Auto-generated method stub}@Overridepublic long getCombinedChildId(long groupId, long childId) {// TODO Auto-generated method stubreturn 0;}@Overridepublic long getCombinedGroupId(long groupId) {// TODO Auto-generated method stubreturn 0;}}}</span>

主函数布局

<span style="font-size:24px;"><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" >    <include        android:id="@+id/include1"        android:layout_width="wrap_content"        android:layout_height="20dp"        layout="@layout/xiaoyun" />    <ExpandableListView        android:id="@+id/el"        android:layout_width="match_parent"        android:layout_height="400dp"        android:layout_marginTop="50dp" >    </ExpandableListView>    <TextView        android:id="@+id/textView3"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignLeft="@+id/include1"        android:layout_alignTop="@+id/include1"        android:layout_marginTop="22dp"        android:text="好友分组" /></RelativeLayout></span><pre name="code" class="java"><span style="font-size:24px;">一级列表布局<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="horizontal" >    <TextView        android:id="@+id/textView1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentRight="true"        android:layout_alignParentTop="true"        android:text="4/17" />    <TextView        android:id="@+id/tv_group"        android:layout_width="wrap_content"        android:layout_height="50dp"        android:layout_alignParentLeft="true"        android:layout_alignParentTop="true"        android:layout_marginLeft="45dp"        android:text="textview" /></RelativeLayout></span>

二级列表布局

<span style="font-size:24px;"><?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical" >    <ImageView        android:id="@+id/imageView1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentLeft="true"        android:layout_alignParentTop="true"        android:src="@drawable/ic_launcher" />    <TextView        android:id="@+id/tv_item"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentTop="true"        android:layout_toRightOf="@+id/imageView1"        android:text="TextView"                 /></RelativeLayout></span>