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

朱雀 2022-08-27 13:50 370阅读 0赞

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：

![Center][]![Center 1][]![Center 2][]![Center 3][]

下面通过代码来实现整个效果。

1.主界面布局activity\_main.xml

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

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;
 }
 
 
 }

搜索框颜色选择器：

<?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>

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

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());
 	}
 
 }

4. 拼音比较类：PinyinComparator.java

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());
 		}
 	}
 
 }

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

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;
 	}
 }

6.ExpandaleListView 适配器MyExpandableAdapter.java

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();
 	}
 	
 	@Override
 	public int getGroupCount() {
 		// TODO Auto-generated method stub
 		return mGroup.size();
 	}
 
 	@Override
 	public int getChildrenCount(int groupPosition) {
 		// TODO Auto-generated method stub
 		return mChild.get(groupPosition).size();
 	}
 
 	@Override
 	public Object getGroup(int groupPosition) {
 		// TODO Auto-generated method stub
 		return mGroup.get(groupPosition);
 	}
 
 	@Override
 	public Object getChild(int groupPosition, int childPosition) {
 		// TODO Auto-generated method stub
 		return mChild.get(groupPosition).get(childPosition);
 	}
 
 	@Override
 	public long getGroupId(int groupPosition) {
 		// TODO Auto-generated method stub
 		return groupPosition;
 	}
 
 	@Override
 	public long getChildId(int groupPosition, int childPosition) {
 		// TODO Auto-generated method stub
 		return childPosition;
 	}
 
 	@Override
 	public boolean hasStableIds() {
 		// TODO Auto-generated method stub
 		return false;
 	}
 
 	@Override
 	public View getGroupView(int groupPosition, boolean isExpanded,
 			View convertView, ViewGroup parent) {
 		// TODO Auto-generated method stub
 		GroupHolderView 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;
 	}
 
 	@Override
 	public View getChildView(final int groupPosition, final int childPosition,
 			boolean isLastChild, View convertView, ViewGroup parent) {
 		// TODO Auto-generated method stub
 		
 		ChildHolderView 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(){
 
 			@Override
 			public void onClick(View v) {
 				// TODO Auto-generated method stub
 				Toast.makeText(mContext, "group:" + mGroup.get(groupPosition).getName() + "->child:" + mChild.get(groupPosition).get(childPosition).getName(), Toast.LENGTH_SHORT).show();
 			}
 		});
 		
 		return convertView;
 	}
 
 	@Override
 	public boolean isChildSelectable(int groupPosition, int childPosition) {
 		// TODO Auto-generated method stub
 		return false;
 	}
 	
 	class GroupHolderView{
 		TextView groupTv;
 	}
 	
 	class ChildHolderView{
 		ImageView childIv;
 		TextView childTv;
 		LinearLayout childLl;
 	}
 
 }

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

public void updateListView(List<GroupMemberBean> mGroup,List<List<GroupMemberBean>> mChild) {
 		this.mGroup = mGroup;
 		this.mChild = mChild;
 		notifyDataSetChanged();
 	}

根据传入的mGroup，mChild来更新列表信息。

7.GroupHolderView类所对应的activity\_group.xml

<?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" >
 
 <TextView
 android:id="@+id/my_group_tv"
 android:layout_width="wrap_content"
 android:layout_height="50dp" 
 android:paddingLeft="50dp"
 android:gravity="center_vertical"
 />
 
 </LinearLayout>

8.ChildHolderView类所对应的activity\_child.xml

<?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" >
 
 <ImageView
 android:id="@+id/my_child_iv"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:background="@drawable/ic_launcher" />
 
 <TextView
 android:id="@+id/my_child_tv"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content" />
 
 </LinearLayout>

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

<?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>

10.主界面实现代码：MainActivity.java

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;
 
 	@Override
 	protected 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() {
 
 			@Override
 			public void onClick(View v) {
 				// TODO Auto-generated method stub
 				myAdapter = new MyExpandableAdapter(MainActivity.this,
 						groupBeanList, childBeanList);
 				myExpandLv.setAdapter(myAdapter);
 				myExpandLv.expandGroup(0);
 			}
 
 		});
 
 		myClearEt = (ClearEditText) this.findViewById(R.id.filter_edit);
 
 		myClearEt.addTextChangedListener(new TextWatcher() {
 
 			@Override
 			public void beforeTextChanged(CharSequence s, int start, int count,
 					int after) {
 				// TODO Auto-generated method stub
 
 			}
 
 			@Override
 			public void onTextChanged(CharSequence s, int start, int before,
 					int count) {
 				// TODO Auto-generated method stub
 				filterData(s.toString());
 			}
 
 			@Override
 			public void afterTextChanged(Editable s) {
 				// TODO Auto-generated method stub
 
 			}
 		});
 	}
 
 	@Override
 	public 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;
 	}
 
 	@Override
 	public 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);
 		}
 	}
 }

分析：

myBtn.setOnClickListener(new OnClickListener() {
 
 			@Override
 			public void onClick(View v) {
 				// TODO Auto-generated method stub
 				myAdapter = new MyExpandableAdapter(MainActivity.this,
 						groupBeanList, childBeanList);
 				myExpandLv.setAdapter(myAdapter);
 				myExpandLv.expandGroup(0);
 			}
 
 		});

用于生成列表信息

private List<GroupMemberBean> filledData(String[] date)

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

private void filterData(String filterStr) {

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][http_download.csdn.net_detail_a123demi_7623975]

[Center]: https://img-blog.csdn.net/20140711214333771?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvYTEyM2RlbWk=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center
[Center 1]: https://img-blog.csdn.net/20140711214341384?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvYTEyM2RlbWk=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center
[Center 2]: https://img-blog.csdn.net/20140711214348997?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvYTEyM2RlbWk=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center
[Center 3]: /images/20220823/5008d1ce38674619b04d6c6b72cce016.png
[http_download.csdn.net_detail_a123demi_7623975]: http://download.csdn.net/detail/a123demi/7623975