Android控件之ExpandableListView

 

 

layout/main.xml

<?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"><ExpandableListView android:id="@id/android:list"android:layout_width="fill_parent" android:layout_height="fill_parent"android:drawSelectorOnTop="false"></ExpandableListView><TextView android:layout_width="fill_parent"android:layout_height="fill_parent" android:id="@id/android:empty"android:text="No Data" /></LinearLayout>

layout/childs.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical" android:layout_width="match_parent"android:layout_height="match_parent"><TextView android:layout_width="fill_parent"android:layout_height="fill_parent" android:id="@+id/child"android:textSize="15sp" android:paddingLeft="25px" android:paddingTop="10px"android:paddingRight="5px" android:paddingBottom="10px" android:text="No Data" /></LinearLayout>

layout/groups.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical" android:layout_width="match_parent"android:layout_height="match_parent"><TextView android:layout_width="fill_parent"android:layout_height="fill_parent" android:id="@+id/group"android:textSize="25sp" android:paddingLeft="35px" android:paddingTop="10px"android:paddingRight="5px" android:paddingBottom="10px" android:text="No Data" /></LinearLayout>

 

ExpandableListViewActivity.java

package com.zeph.android.expandablelistview.example;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import android.app.ExpandableListActivity;import android.os.Bundle;import android.view.View;import android.widget.ExpandableListView;import android.widget.SimpleExpandableListAdapter;public class ExpandableListViewActivity extends ExpandableListActivity {/** Called when the activity is first created. */@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);List<Map<String, String>> groups = new ArrayList<Map<String, String>>();// 创建两个一级条目标题Map<String, String> group1 = new HashMap<String, String>();group1.put("group", "音乐");Map<String, String> group2 = new HashMap<String, String>();group2.put("group", "歌词");groups.add(group1);groups.add(group2);// 创建一级条目下的的二级条目List<Map<String, String>> child1 = new ArrayList<Map<String, String>>();// 同样是在一级条目目录下创建两个对应的二级条目目录Map<String, String> childdata1 = new HashMap<String, String>();childdata1.put("child", "青花瓷");Map<String, String> childdata2 = new HashMap<String, String>();childdata2.put("child", "东风破");child1.add(childdata1);child1.add(childdata2);// 同上List<Map<String, String>> child2 = new ArrayList<Map<String, String>>();Map<String, String> childdata3 = new HashMap<String, String>();childdata3.put("child", "青花瓷.lrc");Map<String, String> childdata4 = new HashMap<String, String>();childdata4.put("child", "东风破.lrc");child2.add(childdata3);child2.add(childdata4);// 将二级条目放在一个集合里，供显示时使用List<List<Map<String, String>>> childs = new ArrayList<List<Map<String, String>>>();childs.add(child1);childs.add(child2);/** * 使用SimpleExpandableListAdapter显示ExpandableListView 参数1.上下文对象Context * 参数2.一级条目目录集合 参数3.一级条目对应的布局文件 参数4.fromto，就是map中的key，指定要显示的对象 * 参数5.与参数4对应，指定要显示在groups中的id 参数6.二级条目目录集合 参数7.二级条目对应的布局文件 * 参数8.fromto，就是map中的key，指定要显示的对象 参数9.与参数8对应，指定要显示在childs中的id */SimpleExpandableListAdapter adapter = new SimpleExpandableListAdapter(this, groups, R.layout.groups, new String[] { "group" },new int[] { R.id.group }, childs, R.layout.childs,new String[] { "child" }, new int[] { R.id.child });setListAdapter(adapter);}/** * 设置哪个二级目录被默认选中 */@Overridepublic boolean setSelectedChild(int groupPosition, int childPosition,boolean shouldExpandGroup) {// do somethingreturn super.setSelectedChild(groupPosition, childPosition,shouldExpandGroup);}/** * 设置哪个一级目录被默认选中 */@Overridepublic void setSelectedGroup(int groupPosition) {// do somethingsuper.setSelectedGroup(groupPosition);}/** * 当二级条目被点击时响应 */@Overridepublic boolean onChildClick(ExpandableListView parent, View v,int groupPosition, int childPosition, long id) {// do somethingreturn super.onChildClick(parent, v, groupPosition, childPosition, id);}}

 

转载自：http://android.tgbus.com/Android/tutorial/201110/373238.shtml