本文采用一个demo来展示android中expandablelistview控件的使用，如如何在组/子listview中绑定数据源。直接上代码如下：
程序结构图：
layout目录下的 main.xml 文件源码如下：
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<?xml version="1.0" encoding="utf-8"?>
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<!-- 我们会自己定义listview的显示方式（在另外一个布局文件里边）不用默认的方式
如果自定义listview的显示方式这里这个android:id="@id/android:list" 必须这样写 -->
<!-- android:drawselectontop="false"此属性用来设置listview上的背景颜色会不会
挡住（覆盖）内容 , 如果这是为false就表示不会覆盖掉 -->
<expandablelistview
android:id="@id/android:list" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_weight="1" android:drawselectorontop="false"/>
</linearlayout>
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包com.andyidea.demo中contactsactivity.java源码如下：
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package com.andyidea.demo;
import java.util.arraylist;
import java.util.list;
import android.app.expandablelistactivity;
import android.os.bundle;
import android.view.gravity;
import android.view.view;
import android.view.viewgroup;
import android.view.window;
import android.widget.abslistview;
import android.widget.baseexpandablelistadapter;
import android.widget.textview;
public class contactsactivity extends expandablelistactivity {
list<string> group; //组列表
list<list<string>> child; //子列表
contactsinfoadapter adapter; //数据适配器
/** called when the activity is first created. */
@override
public void oncreate(bundle savedinstancestate) {
super.oncreate(savedinstancestate);
requestwindowfeature(window.feature_no_title); //设置为无标题
setcontentview(r.layout.main);
getexpandablelistview().setbackgroundresource(r.drawable.default_bg);
initializedata();
getexpandablelistview().setadapter(new contactsinfoadapter());
getexpandablelistview().setcachecolorhint(0); //设置拖动列表的时候防止出现黑色背景
}
/**
* 初始化组、子列表数据
*/
private void initializedata(){
group = new arraylist<string>();
child = new arraylist<list<string>>();
addinfo("andy",new string[]{"male","138123***","guangzhou"});
addinfo("fairy",new string[]{"female","138123***","guangzhou"});
addinfo("jerry",new string[]{"male","138123***","shenzhen"});
addinfo("tom",new string[]{"female","138123***","shanghai"});
addinfo("bill",new string[]{"male","138231***","zhanjiang"});
}
/**
* 模拟给组、子列表添加数据
* @param g-group
* @param c-child
*/
private void addinfo(string g,string[] c){
group.add(g);
list<string> childitem = new arraylist<string>();
for(int i=0;i<c.length;i++){
childitem.add(c[i]);
}
child.add(childitem);
}
class contactsinfoadapter extends baseexpandablelistadapter{
//-----------------child----------------//
@override
public object getchild(int groupposition, int childposition) {
return child.get(groupposition).get(childposition);
}
@override
public long getchildid(int groupposition, int childposition) {
return childposition;
}
@override
public int getchildrencount(int groupposition) {
return child.get(groupposition).size();
}
@override
public view getchildview(int groupposition, int childposition,
boolean islastchild, view convertview, viewgroup parent) {
string string = child.get(groupposition).get(childposition);
return getgenericview(string);
}
//----------------group----------------//
@override
public object getgroup(int groupposition) {
return group.get(groupposition);
}
@override
public long getgroupid(int groupposition) {
return groupposition;
}
@override
public int getgroupcount() {
return group.size();
}
@override
public view getgroupview(int groupposition, boolean isexpanded,
view convertview, viewgroup parent) {
string string = group.get(groupposition);
return getgenericview(string);
}
//创建组/子视图
public textview getgenericview(string s) {
// layout parameters for the expandablelistview
abslistview.layoutparams lp = new abslistview.layoutparams(
viewgroup.layoutparams.fill_parent, 40);
textview text = new textview(contactsactivity.this);
text.setlayoutparams(lp);
// center the text vertically
text.setgravity(gravity.center_vertical | gravity.left);
// set the text starting position
text.setpadding(36, 0, 0, 0);
text.settext(s);
return text;
}
@override
public boolean hasstableids() {
// todo auto-generated method stub
return false;
}
@override
public boolean ischildselectable(int groupposition, int childposition) {
// todo auto-generated method stub
return true;
}
}
}
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最后，程序运行后截图如下：
希望本文所述对大家学习android软件编程有所帮助。