详细讲解ExpandableListView显示和查询仿QQ分组列表用户信息

在我们的项目开发过程中，经常会对用户的信息进行分组，即通过组来显示用户的信息，同时通过一定的查询条件来显示查询后的相关用户信息，并且通过颜色选择器来设置列表信息的背景颜色。

其中借鉴xiaanming:http://blog.csdn.net/xiaanming/article/details/12684155

下面来看看项目运行后的效果图以及代码结构图：

下面通过代码来实现整个效果。

1.主界面布局activity_main.xml

<span style="font-size:18px;"><LinearLayout 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:orientation="vertical"android:paddingBottom="@dimen/activity_vertical_margin"android:paddingLeft="@dimen/activity_horizontal_margin"android:paddingRight="@dimen/activity_horizontal_margin"android:paddingTop="@dimen/activity_vertical_margin" ><Buttonandroid:id="@+id/my_btn"android:layout_width="match_parent"android:layout_height="wrap_content"android:text="生成部门列表" /><com.example.myexpandabledemo.ClearEditTextandroid:id="@+id/filter_edit"android:layout_width="fill_parent"android:layout_height="60dp"android:layout_marginTop="10dip"android:background="@drawable/search_bar_edit_selector"android:drawableLeft="@drawable/search_bar_icon_normal"android:hint="搜索"android:singleLine="true"android:textSize="15.0dip" /><TextViewandroid:id="@+id/no_search_result_tv"android:layout_width="match_parent"android:layout_height="wrap_content"android:text="未搜索到结果"android:visibility="gone"/><ExpandableListViewandroid:id="@+id/my_expand_lv"android:layout_width="match_parent"android:layout_height="wrap_content" /></LinearLayout></span>

分析：主界面主要有一个Button,一个自定义搜索的ClearEditText，一个无查询结果的TextView,一个列表信息显示ExpandableListView。其中Button主要用来生成列表信息。

2.自定义的ClearEditText的搜索框CliearEditText.java

<span style="font-size:18px;">package com.example.myexpandabledemo;
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnFocusChangeListener;
import android.view.animation.Animation;
import android.view.animation.CycleInterpolator;
import android.view.animation.TranslateAnimation;
import android.widget.EditText;public class ClearEditText extends EditText implements  OnFocusChangeListener, TextWatcher { /*** 删除按钮的引用*/private Drawable mClearDrawable; public ClearEditText(Context context) { this(context, null); } public ClearEditText(Context context, AttributeSet attrs) { //这里构造方法也很重要，不加这个很多属性不能再XML里面定义this(context, attrs, android.R.attr.editTextStyle); } public ClearEditText(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);init();}private void init() { //获取EditText的DrawableRight,假如没有设置我们就使用默认的图片mClearDrawable = getCompoundDrawables()[2]; if (mClearDrawable == null) { mClearDrawable = getResources() .getDrawable(R.drawable.emotionstore_progresscancelbtn); } mClearDrawable.setBounds(0, 0, mClearDrawable.getIntrinsicWidth(), mClearDrawable.getIntrinsicHeight()); setClearIconVisible(false); setOnFocusChangeListener(this); addTextChangedListener(this); } /*** 因为我们不能直接给EditText设置点击事件，所以我们用记住我们按下的位置来模拟点击事件* 当我们按下的位置 在  EditText的宽度 - 图标到控件右边的间距 - 图标的宽度  和* EditText的宽度 - 图标到控件右边的间距之间我们就算点击了图标，竖直方向没有考虑*/@Override public boolean onTouchEvent(MotionEvent event) { if (getCompoundDrawables()[2] != null) { if (event.getAction() == MotionEvent.ACTION_UP) { boolean touchable = event.getX() > (getWidth() - getPaddingRight() - mClearDrawable.getIntrinsicWidth()) && (event.getX() < ((getWidth() - getPaddingRight())));if (touchable) { this.setText(""); } } } return super.onTouchEvent(event); } /*** 当ClearEditText焦点发生变化的时候，判断里面字符串长度设置清除图标的显示与隐藏*/@Override public void onFocusChange(View v, boolean hasFocus) { if (hasFocus) { setClearIconVisible(getText().length() > 0); } else { setClearIconVisible(false); } } /*** 设置清除图标的显示与隐藏，调用setCompoundDrawables为EditText绘制上去* @param visible*/protected void setClearIconVisible(boolean visible) { Drawable right = visible ? mClearDrawable : null; setCompoundDrawables(getCompoundDrawables()[0], getCompoundDrawables()[1], right, getCompoundDrawables()[3]); } /*** 当输入框里面内容发生变化的时候回调的方法*/@Override public void onTextChanged(CharSequence s, int start, int count, int after) { setClearIconVisible(s.length() > 0); } @Override public void beforeTextChanged(CharSequence s, int start, int count, int after) { } @Override public void afterTextChanged(Editable s) { } /*** 设置晃动动画*/public void setShakeAnimation(){this.setAnimation(shakeAnimation(5));}/*** 晃动动画* @param counts 1秒钟晃动多少下* @return*/public static Animation shakeAnimation(int counts){Animation translateAnimation = new TranslateAnimation(0, 10, 0, 0);translateAnimation.setInterpolator(new CycleInterpolator(counts));translateAnimation.setDuration(1000);return translateAnimation;}}</span>

搜索框颜色选择器：

<span style="font-size:18px;"><?xml version="1.0" encoding="UTF-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android"><item android:state_focused="true" android:drawable="@drawable/search_bar_edit_pressed"></item><item android:state_pressed="true" android:drawable="@drawable/search_bar_edit_pressed"></item><item android:drawable="@drawable/search_bar_edit_normal"></item>
</selector></span>

3.汉字拼音排序所需要的汉字转拼音：CharacterParser.java

<span style="font-size:18px;">package com.example.myexpandabledemo;/*** Java汉字转换为拼音* */
public class CharacterParser {private static int[] pyvalue = new int[] {-20319, -20317, -20304, -20295, -20292, -20283, -20265, -20257, -20242, -20230, -20051, -20036, -20032,-20026, -20002, -19990, -19986, -19982, -19976, -19805, -19784, -19775, -19774, -19763, -19756, -19751, -19746, -19741, -19739, -19728,-19725, -19715, -19540, -19531, -19525, -19515, -19500, -19484, -19479, -19467, -19289, -19288, -19281, -19275, -19270, -19263, -19261,-19249, -19243, -19242, -19238, -19235, -19227, -19224, -19218, -19212, -19038, -19023, -19018, -19006, -19003, -18996, -18977, -18961,-18952, -18783, -18774, -18773, -18763, -18756, -18741, -18735, -18731, -18722, -18710, -18697, -18696, -18526, -18518, -18501, -18490,-18478, -18463, -18448, -18447, -18446, -18239, -18237, -18231, -18220, -18211, -18201, -18184, -18183, -18181, -18012, -17997, -17988,-17970, -17964, -17961, -17950, -17947, -17931, -17928, -17922, -17759, -17752, -17733, -17730, -17721, -17703, -17701, -17697, -17692,-17683, -17676, -17496, -17487, -17482, -17468, -17454, -17433, -17427, -17417, -17202, -17185, -16983, -16970, -16942, -16915, -16733,-16708, -16706, -16689, -16664, -16657, -16647, -16474, -16470, -16465, -16459, -16452, -16448, -16433, -16429, -16427, -16423, -16419,-16412, -16407, -16403, -16401, -16393, -16220, -16216, -16212, -16205, -16202, -16187, -16180, -16171, -16169, -16158, -16155, -15959,-15958, -15944, -15933, -15920, -15915, -15903, -15889, -15878, -15707, -15701, -15681, -15667, -15661, -15659, -15652, -15640, -15631,-15625, -15454, -15448, -15436, -15435, -15419, -15416, -15408, -15394, -15385, -15377, -15375, -15369, -15363, -15362, -15183, -15180,-15165, -15158, -15153, -15150, -15149, -15144, -15143, -15141, -15140, -15139, -15128, -15121, -15119, -15117, -15110, -15109, -14941,-14937, -14933, -14930, -14929, -14928, -14926, -14922, -14921, -14914, -14908, -14902, -14894, -14889, -14882, -14873, -14871, -14857,-14678, -14674, -14670, -14668, -14663, -14654, -14645, -14630, -14594, -14429, -14407, -14399, -14384, -14379, -14368, -14355, -14353,-14345, -14170, -14159, -14151, -14149, -14145, -14140, -14137, -14135, -14125, -14123, -14122, -14112, -14109, -14099, -14097, -14094,-14092, -14090, -14087, -14083, -13917, -13914, -13910, -13907, -13906, -13905, -13896, -13894, -13878, -13870, -13859, -13847, -13831,-13658, -13611, -13601, -13406, -13404, -13400, -13398, -13395, -13391, -13387, -13383, -13367, -13359, -13356, -13343, -13340, -13329,-13326, -13318, -13147, -13138, -13120, -13107, -13096, -13095, -13091, -13076, -13068, -13063, -13060, -12888, -12875, -12871, -12860,-12858, -12852, -12849, -12838, -12831, -12829, -12812, -12802, -12607, -12597, -12594, -12585, -12556, -12359, -12346, -12320, -12300,-12120, -12099, -12089, -12074, -12067, -12058, -12039, -11867, -11861, -11847, -11831, -11798, -11781, -11604, -11589, -11536, -11358,-11340, -11339, -11324, -11303, -11097, -11077, -11067, -11055, -11052, -11045, -11041, -11038, -11024, -11020, -11019, -11018, -11014,-10838, -10832, -10815, -10800, -10790, -10780, -10764, -10587, -10544, -10533, -10519, -10331, -10329, -10328, -10322, -10315, -10309,-10307, -10296, -10281, -10274, -10270, -10262, -10260, -10256, -10254};public static String[] pystr = new String[] {"a", "ai", "an", "ang", "ao", "ba", "bai", "ban", "bang", "bao", "bei", "ben", "beng", "bi", "bian","biao", "bie", "bin", "bing", "bo", "bu", "ca", "cai", "can", "cang", "cao", "ce", "ceng", "cha", "chai", "chan", "chang", "chao", "che","chen", "cheng", "chi", "chong", "chou", "chu", "chuai", "chuan", "chuang", "chui", "chun", "chuo", "ci", "cong", "cou", "cu", "cuan","cui", "cun", "cuo", "da", "dai", "dan", "dang", "dao", "de", "deng", "di", "dian", "diao", "die", "ding", "diu", "dong", "dou", "du","duan", "dui", "dun", "duo", "e", "en", "er", "fa", "fan", "fang", "fei", "fen", "feng", "fo", "fou", "fu", "ga", "gai", "gan", "gang","gao", "ge", "gei", "gen", "geng", "gong", "gou", "gu", "gua", "guai", "guan", "guang", "gui", "gun", "guo", "ha", "hai", "han", "hang","hao", "he", "hei", "hen", "heng", "hong", "hou", "hu", "hua", "huai", "huan", "huang", "hui", "hun", "huo", "ji", "jia", "jian","jiang", "jiao", "jie", "jin", "jing", "jiong", "jiu", "ju", "juan", "jue", "jun", "ka", "kai", "kan", "kang", "kao", "ke", "ken","keng", "kong", "kou", "ku", "kua", "kuai", "kuan", "kuang", "kui", "kun", "kuo", "la", "lai", "lan", "lang", "lao", "le", "lei", "leng","li", "lia", "lian", "liang", "liao", "lie", "lin", "ling", "liu", "long", "lou", "lu", "lv", "luan", "lue", "lun", "luo", "ma", "mai","man", "mang", "mao", "me", "mei", "men", "meng", "mi", "mian", "miao", "mie", "min", "ming", "miu", "mo", "mou", "mu", "na", "nai","nan", "nang", "nao", "ne", "nei", "nen", "neng", "ni", "nian", "niang", "niao", "nie", "nin", "ning", "niu", "nong", "nu", "nv", "nuan","nue", "nuo", "o", "ou", "pa", "pai", "pan", "pang", "pao", "pei", "pen", "peng", "pi", "pian", "piao", "pie", "pin", "ping", "po", "pu","qi", "qia", "qian", "qiang", "qiao", "qie", "qin", "qing", "qiong", "qiu", "qu", "quan", "que", "qun", "ran", "rang", "rao", "re","ren", "reng", "ri", "rong", "rou", "ru", "ruan", "rui", "run", "ruo", "sa", "sai", "san", "sang", "sao", "se", "sen", "seng", "sha","shai", "shan", "shang", "shao", "she", "shen", "sheng", "shi", "shou", "shu", "shua", "shuai", "shuan", "shuang", "shui", "shun","shuo", "si", "song", "sou", "su", "suan", "sui", "sun", "suo", "ta", "tai", "tan", "tang", "tao", "te", "teng", "ti", "tian", "tiao","tie", "ting", "tong", "tou", "tu", "tuan", "tui", "tun", "tuo", "wa", "wai", "wan", "wang", "wei", "wen", "weng", "wo", "wu", "xi","xia", "xian", "xiang", "xiao", "xie", "xin", "xing", "xiong", "xiu", "xu", "xuan", "xue", "xun", "ya", "yan", "yang", "yao", "ye", "yi","yin", "ying", "yo", "yong", "you", "yu", "yuan", "yue", "yun", "za", "zai", "zan", "zang", "zao", "ze", "zei", "zen", "zeng", "zha","zhai", "zhan", "zhang", "zhao", "zhe", "zhen", "zheng", "zhi", "zhong", "zhou", "zhu", "zhua", "zhuai", "zhuan", "zhuang", "zhui","zhun", "zhuo", "zi", "zong", "zou", "zu", "zuan", "zui", "zun", "zuo"};private StringBuilder buffer;private String resource;private static CharacterParser characterParser = new CharacterParser();public static CharacterParser getInstance() {return characterParser;}public String getResource() {return resource;}public void setResource(String resource) {this.resource = resource;}/** * 汉字转成ASCII码 * * @param chs * @return */private int getChsAscii(String chs) {int asc = 0;try {byte[] bytes = chs.getBytes("gb2312");if (bytes == null || bytes.length > 2 || bytes.length <= 0) {throw new RuntimeException("illegal resource string");}if (bytes.length == 1) {asc = bytes[0];}if (bytes.length == 2) {int hightByte = 256 + bytes[0];int lowByte = 256 + bytes[1];asc = (256 * hightByte + lowByte) - 256 * 256;}} catch (Exception e) {System.out.println("ERROR:ChineseSpelling.class-getChsAscii(String chs)" + e);}return asc;}/** * 单字解析 * * @param str * @return */public String convert(String str) {String result = null;int ascii = getChsAscii(str);if (ascii > 0 && ascii < 160) {result = String.valueOf((char) ascii);} else {for (int i = (pyvalue.length - 1); i >= 0; i--) {if (pyvalue[i] <= ascii) {result = pystr[i];break;}}}return result;}/** * 词组解析 * * @param chs * @return */public String getSelling(String chs) {String key, value;buffer = new StringBuilder();for (int i = 0; i < chs.length(); i++) {key = chs.substring(i, i + 1);if (key.getBytes().length >= 2) {value = (String) convert(key);if (value == null) {value = "unknown";}} else {value = key;}buffer.append(value);}return buffer.toString();}public String getSpelling() {return this.getSelling(this.getResource());}}
</span>

4. 拼音比较类：PinyinComparator.java

<span style="font-size:18px;">package com.example.myexpandabledemo;import java.util.Comparator;public class PinyinComparator implements Comparator<GroupMemberBean> {public int compare(GroupMemberBean o1, GroupMemberBean o2) {if (o1.getSortLetters().equals("@")|| o2.getSortLetters().equals("#")) {return -1;} else if (o1.getSortLetters().equals("#")|| o2.getSortLetters().equals("@")) {return 1;} else {return o1.getSortLetters().compareTo(o2.getSortLetters());}}}
</span>

5. 显示列表信息的名字以及其拼音首字母 GrouMemberBean.java

<span style="font-size:18px;">package com.example.myexpandabledemo;public class GroupMemberBean {private String name;   //显示的数据private String sortLetters;  //显示数据拼音的首字母public String getName() {return name;}public void setName(String name) {this.name = name;}public String getSortLetters() {return sortLetters;}public void setSortLetters(String sortLetters) {this.sortLetters = sortLetters;}
}
</span>

6.ExpandaleListView 适配器MyExpandableAdapter.java

<span style="font-size:18px;">package com.example.myexpandabledemo;import java.util.List;import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;public class MyExpandableAdapter extends BaseExpandableListAdapter {private Context mContext;private List<GroupMemberBean> mGroup;private List<List<GroupMemberBean>> mChild;private LayoutInflater mInflater;public MyExpandableAdapter(Context mContext,List<GroupMemberBean> mGroup,List<List<GroupMemberBean>> mChild){this.mContext = mContext;this.mGroup = mGroup;this.mChild = mChild;this.mInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);}/*** 当ListView数据发生变化时,调用此方法来更新ListView* * @param list*/public void updateListView(List<GroupMemberBean> mGroup,List<List<GroupMemberBean>> mChild) {this.mGroup = mGroup;this.mChild = mChild;notifyDataSetChanged();}@Overridepublic int getGroupCount() {// TODO Auto-generated method stubreturn mGroup.size();}@Overridepublic int getChildrenCount(int groupPosition) {// TODO Auto-generated method stubreturn mChild.get(groupPosition).size();}@Overridepublic Object getGroup(int groupPosition) {// TODO Auto-generated method stubreturn mGroup.get(groupPosition);}@Overridepublic Object getChild(int groupPosition, int childPosition) {// TODO Auto-generated method stubreturn mChild.get(groupPosition).get(childPosition);}@Overridepublic long getGroupId(int groupPosition) {// TODO Auto-generated method stubreturn groupPosition;}@Overridepublic long getChildId(int groupPosition, int childPosition) {// TODO Auto-generated method stubreturn childPosition;}@Overridepublic boolean hasStableIds() {// TODO Auto-generated method stubreturn false;}@Overridepublic View getGroupView(int groupPosition, boolean isExpanded,View convertView, ViewGroup parent) {// TODO Auto-generated method stubGroupHolderView groupHolderView;if(convertView == null){groupHolderView = new GroupHolderView();convertView = (View) mInflater.inflate(R.layout.activity_group, null);groupHolderView.groupTv = (TextView) convertView.findViewById(R.id.my_group_tv);convertView.setTag(groupHolderView);}else{groupHolderView = (GroupHolderView) convertView.getTag();}groupHolderView.groupTv.setText(mGroup.get(groupPosition).getName());return convertView;}@Overridepublic View getChildView(final int groupPosition, final int childPosition,boolean isLastChild, View convertView, ViewGroup parent) {// TODO Auto-generated method stubChildHolderView childHolderView;if(convertView == null){childHolderView = new ChildHolderView();convertView = (View) mInflater.inflate(R.layout.activity_child, null);childHolderView.childIv = (ImageView) convertView.findViewById(R.id.my_child_iv);childHolderView.childTv = (TextView) convertView.findViewById(R.id.my_child_tv);childHolderView.childLl = (LinearLayout) convertView.findViewById(R.id.my_child_ll);convertView.setTag(childHolderView);}else{childHolderView = (ChildHolderView) convertView.getTag();}childHolderView.childTv.setText(mChild.get(groupPosition).get(childPosition).getName());childHolderView.childLl.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v) {// TODO Auto-generated method stubToast.makeText(mContext, "group:" + mGroup.get(groupPosition).getName() + "->child:" + mChild.get(groupPosition).get(childPosition).getName(), Toast.LENGTH_SHORT).show();}});return convertView;}@Overridepublic boolean isChildSelectable(int groupPosition, int childPosition) {// TODO Auto-generated method stubreturn false;}class GroupHolderView{TextView groupTv;}class ChildHolderView{ImageView childIv;TextView childTv;LinearLayout childLl;}}</span>

分析：

GroupHolderView:用于显示组信息

ChildHolderView:用于显示组下成员信息。包括一个LinearLayout,一个ImageView,一个TextVIew

private List<GroupMemberBean> mGroup; 包含组的所有List信息
private List<List<GroupMemberBean>> mChild;包含所有的组下成员信息

<span style="font-size:18px;">  public void updateListView(List<GroupMemberBean> mGroup,List<List<GroupMemberBean>> mChild) {this.mGroup = mGroup;this.mChild = mChild;notifyDataSetChanged();}</span>

根据传入的mGroup，mChild来更新列表信息。

7.GroupHolderView类所对应的activity_group.xml

<span style="font-size:18px;"><?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical" ><TextViewandroid:id="@+id/my_group_tv"android:layout_width="wrap_content"android:layout_height="50dp" android:paddingLeft="50dp"android:gravity="center_vertical"/></LinearLayout></span>

8.ChildHolderView类所对应的activity_child.xml

<span style="font-size:18px;"><?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:id="@+id/my_child_ll"android:layout_width="match_parent"android:layout_height="match_parent"android:background="@drawable/my_child_selector"android:orientation="horizontal" ><ImageViewandroid:id="@+id/my_child_iv"android:layout_width="wrap_content"android:layout_height="wrap_content"android:background="@drawable/ic_launcher" /><TextViewandroid:id="@+id/my_child_tv"android:layout_width="wrap_content"android:layout_height="wrap_content" /></LinearLayout></span>

分析：根据android:background="@drawable/my_child_selector" 颜色选择器来设置每个列表行(选中或正常)的背景色。

9.颜色选择器my_child_selector.xml

<span style="font-size:18px;"><?xml version="1.0" encoding="UTF-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android"><item android:state_focused="true" android:drawable="@color/press_color"></item><item android:state_pressed="true" android:drawable="@color/press_color"></item><item android:drawable="@color/normal_color"></item>
</selector></span>

10.主界面实现代码：MainActivity.java

<span style="font-size:18px;">package com.example.myexpandabledemo;import java.util.ArrayList;
import java.util.Collections;
import java.util.List;import android.app.Activity;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextUtils;
import android.text.TextWatcher;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ExpandableListView;
import android.widget.TextView;public class MainActivity extends Activity {private Button myBtn;private ExpandableListView myExpandLv;private ClearEditText myClearEt;private TextView noSearchResultTv;private MyExpandableAdapter myAdapter;private List<GroupMemberBean> groupBeanList;private List<List<GroupMemberBean>> childBeanList = new ArrayList<List<GroupMemberBean>>();/*** 汉字转换成拼音的类*/private CharacterParser characterParser;/*** 根据拼音来排列ListView里面的数据类*/private PinyinComparator pinyinComparator;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);init();}private void init() {noSearchResultTv = (TextView)this.findViewById(R.id.no_search_result_tv);myExpandLv = (ExpandableListView) this.findViewById(R.id.my_expand_lv);// 实例化汉字转拼音类characterParser = CharacterParser.getInstance();pinyinComparator = new PinyinComparator();groupBeanList = filledData(this.getResources().getStringArray(R.array.depart));List<GroupMemberBean> tempOne = filledData(this.getResources().getStringArray(R.array.child_one));List<GroupMemberBean> tempTwo = filledData(this.getResources().getStringArray(R.array.child_two));// 根据a-z进行排序源数据Collections.sort(groupBeanList, pinyinComparator);Collections.sort(tempOne, pinyinComparator);Collections.sort(tempTwo, pinyinComparator);for (int i = 0; i < groupBeanList.size(); i++) {if (i % 2 == 0) {childBeanList.add(tempOne);} else {childBeanList.add(tempTwo);}}//用于生成列表信息myBtn = (Button) this.findViewById(R.id.my_btn);myBtn.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubmyAdapter = new MyExpandableAdapter(MainActivity.this,groupBeanList, childBeanList);myExpandLv.setAdapter(myAdapter);myExpandLv.expandGroup(0);}});myClearEt = (ClearEditText) this.findViewById(R.id.filter_edit);myClearEt.addTextChangedListener(new TextWatcher() {@Overridepublic void beforeTextChanged(CharSequence s, int start, int count,int after) {// TODO Auto-generated method stub}@Overridepublic void onTextChanged(CharSequence s, int start, int before,int count) {// TODO Auto-generated method stubfilterData(s.toString());}@Overridepublic void afterTextChanged(Editable s) {// TODO Auto-generated method stub}});}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.main, menu);return true;}@Overridepublic boolean onOptionsItemSelected(MenuItem item) {// Handle action bar item clicks here. The action bar will// automatically handle clicks on the Home/Up button, so long// as you specify a parent activity in AndroidManifest.xml.int id = item.getItemId();if (id == R.id.action_settings) {return true;}return super.onOptionsItemSelected(item);}/*** 为ListView填充数据* * @param date* @return*/private List<GroupMemberBean> filledData(String[] date) {List<GroupMemberBean> mSortList = new ArrayList<GroupMemberBean>();for (int i = 0; i < date.length; i++) {GroupMemberBean sortModel = new GroupMemberBean();sortModel.setName(date[i]);// 汉字转换成拼音String pinyin = characterParser.getSelling(date[i]);String sortString = pinyin.substring(0, 1).toUpperCase();// 正则表达式，判断首字母是否是英文字母if (sortString.matches("[A-Z]")) {sortModel.setSortLetters(sortString.toUpperCase());} else {sortModel.setSortLetters("#");}mSortList.add(sortModel);}return mSortList;}/*** 根据输入框中的值来过滤数据并更新ListView* * @param filterStr*/private void filterData(String filterStr) {List<GroupMemberBean> groupFilterList = new ArrayList<GroupMemberBean>();List<GroupMemberBean> tempFilterList;List<List<GroupMemberBean>> childFilterList = new ArrayList<List<GroupMemberBean>>();if (TextUtils.isEmpty(filterStr)) {groupFilterList = groupBeanList;childFilterList = childBeanList;noSearchResultTv.setVisibility(View.GONE);} else {groupFilterList.clear();childFilterList.clear();for (int i = 0; i < groupBeanList.size(); i++) {//标记departGroup是否加入元素boolean isAddGroup = false;tempFilterList = new ArrayList<GroupMemberBean>();GroupMemberBean sortModel = groupBeanList.get(i);String name = sortModel.getName();// depart有字符直接加入if (name.indexOf(filterStr.toString()) != -1|| characterParser.getSelling(name).startsWith(filterStr.toString())) {if (!groupFilterList.contains(sortModel)) {groupFilterList.add(sortModel);isAddGroup = true;}}for (int j = 0; j < childBeanList.get(i).size(); j++) {GroupMemberBean sortChildModel = childBeanList.get(i).get(j);String childName = sortChildModel.getName();// child有字符直接加入，其父也加入if (childName.indexOf(filterStr.toString()) != -1|| characterParser.getSelling(childName).startsWith(filterStr.toString())) {tempFilterList.add(sortChildModel);if (!groupFilterList.contains(groupBeanList.get(i))) {groupFilterList.add(groupBeanList.get(i));isAddGroup = true;}}}Collections.sort(tempFilterList, pinyinComparator);if (isAddGroup) {childFilterList.add(tempFilterList);}}// 根据a-z进行排序Collections.sort(groupBeanList, pinyinComparator);}if (myAdapter != null) {myAdapter.updateListView(groupFilterList, childFilterList);if (TextUtils.isEmpty(filterStr)) {for (int i = 0; i < groupFilterList.size(); i++) {if (i == 0) {myExpandLv.expandGroup(i);continue;}myExpandLv.collapseGroup(i);}} else {//搜索的结果全部展开for (int i = 0; i < groupFilterList.size(); i++) {myExpandLv.expandGroup(i);}}}//如果查询的结果为0时，显示为搜索到结果的提示if(groupFilterList.size() == 0){noSearchResultTv.setVisibility(View.VISIBLE);}else{noSearchResultTv.setVisibility(View.GONE);}}
}
</span>

分析：

<span style="font-size:18px;">      myBtn.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubmyAdapter = new MyExpandableAdapter(MainActivity.this,groupBeanList, childBeanList);myExpandLv.setAdapter(myAdapter);myExpandLv.expandGroup(0);}});</span>

用于生成列表信息

<span style="font-size:18px;">private List<GroupMemberBean> filledData(String[] date) </span>

根据 res->array定义的字符数组，转化为List<GroupMemberBean>

<span style="font-size:18px;">private void filterData(String filterStr) {</span>

根据查询条件更新列表信息，
重点：1.如果查询的条件为空,直接更新列表初始状态；

假如：filterStr = “g”;

2.如果查询的结果为空，直接给出“未搜索到结果”提示；

3.如果Group中包含filterStr,GroupMemberBean sortModel 直接加入groupFilterList，并标记已加入isAddGroup = true;

如果Child中包含filterStr,定义临时的tempFilterList,GroupMemberBean sortChildModel加入到childFilterList，如果groupFilterList不包含其父组，并将其父加入到groupFilterList，并标记已加入isAddGroup=true;

最后如果isAddGroup=true，将tempFilterList加入到childFilterList。

4.通过myAdapter.updateListView(groupFilterList, childFilterList)，更新列表信息。

其上为本博文的所有内容。

源代码下载：

http://download.csdn.net/detail/a123demi/7623975

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