Android QQ多级列表的实现
?主类：
package com.android.qu.antking.list;import android.app.Activity;import android.content.Context;import android.os.Bundle;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseExpandableListAdapter;import android.widget.ExpandableListView;import android.widget.ImageView;import android.widget.TextView;import java.util.*;public class MyMain extends Activity { //author antkingweiprivate List<Map<String,Object>> parentList=new ArrayList<Map<String,Object>>();private List<List<Map<String,Object>>> childList = new ArrayList<List<Map<String,Object>>>();ExpendAdapter adapter;ExpandableListView exList;private String[] listName = new String[]{"我的好友","高中同学","大学同学","移动开发","网站建设","普通朋友"};private String[] childTitle= new String[]{"丫宁","王八锐","小鸟","连超","董二丫"};private String[] childMood= new String[]{"我喜欢王锐","我就是王八","我也喜欢王锐","上边一群傻帽","同楼上"};private int[] headImage=new int[]{R.drawable.ning,R.drawable.rui,R.drawable.niao,R.drawable.lianchao,R.drawable.xiaoxiao}; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); exList = (ExpandableListView) this.findViewById(R.id.expandableListView1); parentList =getParentList(); childList = getChildList(); adapter = new ExpendAdapter(MyMain.this, parentList, childList); exList.setAdapter(adapter); exList.setGroupIndicator(null); exList.setDivider(null); } public List<Map<String,Object>> getParentList(){ List<Map<String,Object>> list = new ArrayList<Map<String,Object>>(); for(int i=0;i<listName.length;i++){ Map<String, Object> curGroupMap = new HashMap<String, Object>(); list.add(curGroupMap); curGroupMap.put("List", listName[i]); } return list; } public List<List<Map<String,Object>>> getChildList(){ List<List<Map<String,Object>>> list1 = new ArrayList<List<Map<String,Object>>>(); for (int i = 0; i < listName.length; i++) { List<Map<String, Object>> children = new ArrayList<Map<String, Object>>(); for (int j = 0; j <childTitle.length; j++) { Map<String, Object> curChildMap = new HashMap<String, Object>(); children.add(curChildMap); curChildMap.put("Title", childTitle[j]); curChildMap.put("Mood", childMood[j]); curChildMap.put("Head", headImage[j]); } list1.add(children); } return list1; } }?自定义的Adapter
package com.android.qu.antking.list;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseExpandableListAdapter;import android.widget.ImageView;import android.widget.TextView;import android.widget.Toast;import java.util.*;public class ExpendAdapter extends BaseExpandableListAdapter { private LayoutInflater layoutInflater; private Context mContext; private List<Map<String,Object>> parentList = new ArrayList<Map<String,Object>>(); private List<List<Map<String,Object>>> childList = new ArrayList<List<Map<String,Object>>>(); public ExpendAdapter(Context mContext,List<Map<String,Object>> parentList,List<List<Map<String,Object>>> childList){this.mContext = mContext;this.parentList = parentList;this.childList = childList;layoutInflater = LayoutInflater.from(mContext);}public Object getChild(int groupPosition, int childPosition) {// TODO Auto-generated method stubreturn childList.get(groupPosition).get(childPosition).get("Title").toString();}@Overridepublic long getChildId(int groupPosition, int childPosition) {return childPosition;}@Overridepublic View getChildView(int groupPosition, int childPosition,boolean isLastChild, View convertView, ViewGroup parent) {if(convertView ==null){convertView = layoutInflater.inflate(R.layout.childlist, null);}final ImageView head=(ImageView)convertView.findViewById(R.id.headImage); head.setImageResource(Integer.valueOf(childList.get(groupPosition).get(childPosition).get("Head").toString()));final TextView title=(TextView)convertView.findViewById(R.id.title); title.setText(childList.get(groupPosition).get(childPosition).get("Title").toString()); final TextView mood =(TextView)convertView.findViewById(R.id.mood); mood.setText(childList.get(groupPosition).get(childPosition).get("Mood").toString());return convertView;}@Overridepublic int getChildrenCount(int groupPosition) {// TODO Auto-generated method stubreturn childList.get(groupPosition).size();}@Overridepublic Object getGroup(int groupPosition) {// TODO Auto-generated method stubreturn parentList.get(groupPosition).get("List").toString();}@Overridepublic int getGroupCount() {// TODO Auto-generated method stubreturn parentList.size();}@Overridepublic long getGroupId(int groupPosition) {// TODO Auto-generated method stubreturn groupPosition;}@Overridepublic View getGroupView(int groupPosition, boolean isExpanded,View convertView, ViewGroup parent) {if(convertView==null){convertView=layoutInflater.inflate(R.layout.parentlist, null);}final TextView list = (TextView) convertView.findViewById(R.id.list); list.setText(parentList.get(groupPosition).get("List").toString());return convertView;}@Overridepublic boolean hasStableIds() {// TODO Auto-generated method stubToast.makeText(mContext,"nihao",Toast.LENGTH_SHORT).show();return true;}@Overridepublic boolean isChildSelectable(int groupPosition, int childPosition) {Toast.makeText(mContext, "这是第"+groupPosition+"组，第"+childPosition+"个", Toast.LENGTH_SHORT).show();return true;}}?主布局文件
<?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" android:background="@drawable/back1" ><ExpandableListView android:layout_height="wrap_content" android:id="@+id/expandableListView1" android:layout_width="fill_parent"></ExpandableListView></LinearLayout>
?另一个布局文件
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:orientation="horizontal" android:id="@+id/parentList" android:layout_height="wrap_content"> <ImageView android:layout_width="60px" android:layout_height="60px" android:src="@drawable/user_group" /> <TextView android:id="@+id/list" android:textSize="20px" android:layout_width="wrap_content" android:layout_height="wrap_content"/> </LinearLayout>
?最后一段布局
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="wrap_content" android:id="@+id/childList" android:orientation="horizontal" > <ImageView android:paddingLeft="20px" android:id="@+id/headImage" android:src="@drawable/icon" android:layout_width="50px" android:layout_height="50px" android:layout_marginBottom="5px" android:layout_marginRight="10px"/> <LinearLayout android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="wrap_content"> <TextView android:id="@+id/title" android:textSize="18px" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <TextView android:id="@+id/mood" android:textSize="16px" android:layout_width="wrap_content" android:layout_height="wrap_content"/> </LinearLayout></LinearLayout>?