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  • 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


    版权声明:本文博客原创文章,博客,未经同意,不得转载。

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  • 原文地址:https://www.cnblogs.com/mfrbuaa/p/4667936.html
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