Android仿QQ通讯录分组展示ExpandableListView
核心是重写BaseExpandableListAdpter，其实和之前写的普通的BaseAdapter是类似的，
但是BaseExpandableListAdpter则分成了两部分：组和子列表，具体看代码你就知道了！
效果就是这样。有没有像我们的QQ 微信 可分组的联系人
不多说了额，贴代码
布局文件：activity_main.xml
<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="/apk/res/android"xmlns:tools="/tools"android:layout_width="match_parent"android:layout_height="match_parent"android:padding="5dp"tools:context=".MainActivity"><ExpandableListView android:id="@+id/exlist_lol"android:layout_width="match_parent"android:layout_height="match_parent"android:childDivider="#E02D2F"/></RelativeLayout>
展示视图控制文件：MainActivity
package com.yang.expandablelistviewdemo;import android.content.Context;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.view.View;import android.widget.ExpandableListView;import android.widget.Toast;import java.util.ArrayList;public class MainActivity extends AppCompatActivity {private ArrayList<Group> gData = null;private ArrayList<ArrayList<Item>> iData = null;private ArrayList<Item> lData = null;private Context mContext;private ExpandableListView exlist_lol;private MyBaseExpandableListAdapter myAdapter = null;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);mContext = MainActivity.this;exlist_lol = (ExpandableListView) findViewById(R.id.exlist_lol);//数据准备gData = new ArrayList<Group>();iData = new ArrayList<ArrayList<Item>>();gData.add(new Group("AD"));gData.add(new Group("AP"));gData.add(new Group("TANK"));lData = new ArrayList<Item>();//AD组lData.add(new Item(R.mipmap.iv_lol_icon3,"剑圣"));lData.add(new Item(R.mipmap.iv_lol_icon4,"德莱文"));lData.add(new Item(R.mipmap.iv_lol_icon13,"男枪"));lData.add(new Item(R.mipmap.iv_lol_icon14,"韦鲁斯"));iData.add(lData);//AP组lData = new ArrayList<Item>();lData.add(new Item(R.mipmap.iv_lol_icon1, "提莫"));lData.add(new Item(R.mipmap.iv_lol_icon7, "安妮"));lData.add(new Item(R.mipmap.iv_lol_icon8, "天使"));lData.add(new Item(R.mipmap.iv_lol_icon9, "泽拉斯"));lData.add(new Item(R.mipmap.iv_lol_icon11, "狐狸"));iData.add(lData);//TANK组lData = new ArrayList<Item>();lData.add(new Item(R.mipmap.iv_lol_icon2, "诺手"));lData.add(new Item(R.mipmap.iv_lol_icon5, "德邦"));lData.add(new Item(R.mipmap.iv_lol_icon6, "奥拉夫"));lData.add(new Item(R.mipmap.iv_lol_icon10, "龙女"));lData.add(new Item(R.mipmap.iv_lol_icon12, "狗熊"));iData.add(lData);myAdapter = new MyBaseExpandableListAdapter(gData,iData,mContext);exlist_lol.setAdapter(myAdapter);//为列表设置点击事件exlist_lol.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {@Overridepublic boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) {Toast.makeText(mContext, "你点击了：" + iData.get(groupPosition).get(childPosition).getiName(), Toast.LENGTH_SHORT).show();return true;}});}}
MyBaseExpandableListAdapter.java
package com.yang.expandablelistviewdemo;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 java.util.ArrayList;/*** Created by yang_zzheng on /7/20* yangzhizheng@*/public class MyBaseExpandableListAdapter extends BaseExpandableListAdapter {private ArrayList<Group> gData;private ArrayList<ArrayList<Item>> iData;private Context mContext;public MyBaseExpandableListAdapter(ArrayList<Group> gData,ArrayList<ArrayList<Item>> iData, Context mContext) {this.gData = gData;this.iData = iData;this.mContext = mContext;}@Overridepublic int getGroupCount() {return gData.size();}@Overridepublic int getChildrenCount(int groupPosition) {return iData.get(groupPosition).size();}@Overridepublic Group getGroup(int groupPosition) {return gData.get(groupPosition);}@Overridepublic Item getChild(int groupPosition, int childPosition) {return iData.get(groupPosition).get(childPosition);}@Overridepublic long getGroupId(int groupPosition) {return groupPosition;}@Overridepublic long getChildId(int groupPosition, int childPosition) {return childPosition;}@Overridepublic boolean hasStableIds() {return false;}//取得用于显示给定分组的视图. 这个方法仅返回分组的视图对象@Overridepublic View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {ViewHolderGroup groupHolder;if(convertView == null){convertView = LayoutInflater.from(mContext).inflate(R.layout.item_exlist_group, parent, false);groupHolder = new ViewHolderGroup();groupHolder.tv_group_name = (TextView) convertView.findViewById(R.id.tv_group_name);convertView.setTag(groupHolder);}else{groupHolder = (ViewHolderGroup) convertView.getTag();}groupHolder.tv_group_name.setText(gData.get(groupPosition).getgName());return convertView;}//取得显示给定分组给定子位置的数据用的视图@Overridepublic View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {ViewHolderItem itemHolder;if(convertView == null){convertView = LayoutInflater.from(mContext).inflate(R.layout.item_exlist_item, parent, false);itemHolder = new ViewHolderItem();itemHolder.img_icon = (ImageView) convertView.findViewById(R.id.img_icon);itemHolder.tv_name = (TextView) convertView.findViewById(R.id.tv_name);convertView.setTag(itemHolder);}else{itemHolder = (ViewHolderItem) convertView.getTag();}itemHolder.img_icon.setImageResource(iData.get(groupPosition).get(childPosition).getiId());itemHolder.tv_name.setText(iData.get(groupPosition).get(childPosition).getiName());return convertView;}//设置子列表是否可选中@Overridepublic boolean isChildSelectable(int groupPosition, int childPosition) {return true;}private static class ViewHolderGroup{private TextView tv_group_name;}private static class ViewHolderItem{private ImageView img_icon;private TextView tv_name;}}
Item.java
package com.yang.expandablelistviewdemo;/*** Created by yang_zzheng on /7/20* yangzhizheng@*/public class Item {private int iId;private String iName;public Item() {}public Item(int iId, String iName) {this.iId = iId;this.iName = iName;}public int getiId() {return iId;}public String getiName() {return iName;}public void setiId(int iId) {this.iId = iId;}public void setiName(String iName) {this.iName = iName;}}
Group.java
package com.yang.expandablelistviewdemo;/*** Created by yang_zzheng on /7/20* yangzhizheng@*/public class Group {private String gName;public Group() {}public Group(String gName) {this.gName = gName;}public String getgName() {return gName;}public void setgName(String gName) {this.gName = gName;}}
item_exlist_group.xml：
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="horizontal"android:padding="5dp"><TextView android:id="@+id/tv_group_name"android:layout_width="match_parent"android:layout_height="56dp"android:gravity="center_vertical"android:paddingLeft="30dp"android:text="AP"android:textStyle="bold"android:textSize="20sp" /></LinearLayout>
item_exlist_item.xml：
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="horizontal"android:padding="5dp"android:background="#6BBA79"><ImageView android:id="@+id/img_icon"android:layout_width="48dp"android:layout_height="48dp"android:src="@mipmap/iv_lol_icon1"android:focusable="false"/><TextView android:id="@+id/tv_name"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginLeft="15dp"android:layout_marginTop="15dp"android:focusable="false"android:text="提莫"android:textSize="18sp" /></LinearLayout>
不小心又copy学习了一份。
本文参考：/coder_pig/article/details/48731317
