具体评论ExpandableListView显示和查询模仿QQ组列表用户信息

在我们的项目开发过程，用户通常拥有的信息包，通过组来显示用户的信息，一时候通过一定的查询条件来显示查询后的相关用户信息。而且通过颜色选择器来设置列表信息的背景颜色。

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

以下来看看项目执行后的效果图以及代码结构图：

以下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" >

    <Button

        android: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.ClearEditText

        android: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" />

    <TextView

	    android: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"

	    />

    <ExpandableListView

        android: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,一个自己定义搜索的ClearEditText，一个无查询结果的TextView,一个列表信息显示ExpandableListView。

当中Button主要用来生成列表信息。

2.自己定义的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button的引用

	 */

    private Drawable mClearDrawable; 

    public ClearEditText(Context context) {

    	this(context, null);

    } 

    public ClearEditText(Context context, AttributeSet attrs) {

    	//这里构造方法也非常重要，不加这个非常多属性不能再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);

    } 

    /**

     * 由于我们不能直接给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，推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.汉字拼音排序所须要的汉字转拼音：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. 拼音比較类：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();

	}

	@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;

	}

}</span>

分析：

GroupHolderView:用于显示组信息

ChildHolderView:用于显示组下成员信息。包含一个LinearLayout,一个ImageView,一个TextVIew

private List<GroupMemberBean> mGroup; 包括组的全部List信息

private List<List<GroupMemberBean>> mChild;包括全部的组下成员信息

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

		this.mGroup = mGroup;

		this.mChild = mChild;

		notifyDataSetChanged();

	}</span>

依据传入的mGroup，mChild来更新列表信息。

7.GroupHolderView类所相应的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" >

    <TextView

        android: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类所相应的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" >

    <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></span>

分析：依据android:background="@drawable/my_child_selector" 颜色选择器来设置每一个列表行(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;

	/**

	 * 依据拼音来排列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));

		// 依据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();

			// 正則表達式。推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;

	}

	/**

	 * 依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是否增加元素

				boolean isAddGroup = false;

				tempFilterList = new ArrayList<GroupMemberBean>();

				GroupMemberBean sortModel = groupBeanList.get(i);

				String name = sortModel.getName();

				// depart有字符直接增加

				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有字符直接增加，其父也增加

					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);

				}

			}

			// 依据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 {

				//搜索的结果所有展开

				for (int i = 0; i < groupFilterList.size(); i++) {

					myExpandLv.expandGroup(i);

				}

			}

		}

		//假设查询的结果为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() {

			@Override

			public void onClick(View v) {

				// TODO Auto-generated method stub

				myAdapter = 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>

依据 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>

依据查询条件更新列表信息。

重点：1.假设查询的条件为空,直接更新列表初始状态；

假如：filterStr = “g”;

2.假设查询的结果为空，直接给出“未搜索到结果”提示；

3.假设Group中包括filterStr,GroupMemberBean sortModel 直接增加groupFilterList，并标记已增加isAddGroup = true;

假设Child中包括filterStr,定义暂时的tempFilterList,GroupMemberBean sortChildModel增加到childFilterList。假设groupFilterList不包括其父组，并将其父增加到groupFilterList。并标记已增加isAddGroup=true;

最后假设isAddGroup=true，将tempFilterList增加到childFilterList。

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

其上为本博文的全部内容。

源码下载：

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

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