分享一下我老師大神的人工智慧教程！零基礎，通俗易懂！http://blog.csdn.net/jiangjunshow

也歡迎大家轉載本篇文章。分享知識，造福人民，實現我們中華民族偉大復興！

轉載請註明出處：http://blog.csdn.net/xiaanming/article/details/12684155

前段時間因為換工作的緣故又恰巧碰到國慶節，所以有段時間自己沒有更新部落格了，過完國慶到新公司報道，感覺還不錯，就是現在住的地方離新公司有點遠，地鐵20站，傷不起啊，我每天早上7點多就要起床，然後屁顛屁顛的去擠地鐵上班，晚上下班還要擠地鐵，先不說路程遠，車費一天就要10幾塊，我的銀子啊，有坐龍華線去上班的深圳程式設計師不？聽說那條線上班高峰期很擠？我沒在上班高峰期坐過那趟車，我在民治那邊找了個房子，離華強北也不遠，關鍵房租便宜，哈哈，樂開花了，下個禮拜就要搬過去啦

不扯了，回到主題，今天給大家帶來ListView的A-Z字母排序和過濾搜尋功能並且實現漢字轉成拼音的功能，我們知道一般我們對聯絡人，城市列表等實現A-Z的排序，因為聯絡人和城市列表我們可以直接從資料庫中獲取他的漢字拼音，而對於一般的資料，我們怎麼實現A-Z的排序，我們需要將漢字轉換成拼音就行了，接下來就帶大家實現一般資料的A-Z排序功能，首先先看下效果圖

上面是一個帶刪除按鈕的EditText，我們在輸入框中輸入可以自動過濾出我們想要的東西，當輸入框中沒有資料自動替換到原來的資料列表，然後下面一個ListView用來顯示資料列表，右側是一個字母索引表，當我們點選不同的字母,ListView會定位到該字母地方，瞭解了佈局之後，我們先看下專案結構吧

我按照專案中類的順序來一一介紹其功能

1.SortModel 一個實體類，裡面一個是ListView的name,另一個就是顯示的name拼音的首字母

package com.example.sortlistview;public class SortModel { private String name;   //顯示的資料 private String sortLetters;  //顯示資料拼音的首字母  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; }}

package com.example.sortlistview;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.Typeface;import android.graphics.drawable.ColorDrawable;import android.util.AttributeSet;import android.view.MotionEvent;import android.view.View;import android.widget.TextView;public class SideBar extends View { // 觸控事件 private OnTouchingLetterChangedListener onTouchingLetterChangedListener; // 26個字母 public static String[] b = { "A", "B", "C", "D", "E", "F", "G", "H", "I",   "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V",   "W", "X", "Y", "Z", "#" }; private int choose = -1;// 選中 private Paint paint = new Paint(); private TextView mTextDialog; /**  * 為SideBar設定顯示字母的TextView  * @param mTextDialog  */ public void setTextView(TextView mTextDialog) {  this.mTextDialog = mTextDialog; } public SideBar(Context context, AttributeSet attrs, int defStyle) {  super(context, attrs, defStyle); } public SideBar(Context context, AttributeSet attrs) {  super(context, attrs); } public SideBar(Context context) {  super(context); } /**  * 重寫這個方法  */ protected void onDraw(Canvas canvas) {  super.onDraw(canvas);  // 獲取焦點改變背景顏色.  int height = getHeight();// 獲取對應高度  int width = getWidth(); // 獲取對應寬度  int singleHeight = height / b.length;// 獲取每一個字母的高度  for (int i = 0; i < b.length; i++) {   paint.setColor(Color.rgb(33, 65, 98));   // paint.setColor(Color.WHITE);   paint.setTypeface(Typeface.DEFAULT_BOLD);   paint.setAntiAlias(true);   paint.setTextSize(20);   // 選中的狀態   if (i == choose) {    paint.setColor(Color.parseColor("#3399ff"));    paint.setFakeBoldText(true);   }   // x座標等於中間-字串寬度的一半.   float xPos = width / 2 - paint.measureText(b[i]) / 2;   float yPos = singleHeight * i + singleHeight;   canvas.drawText(b[i], xPos, yPos, paint);   paint.reset();// 重置畫筆  } } @Override public boolean dispatchTouchEvent(MotionEvent event) {  final int action = event.getAction();  final float y = event.getY();// 點選y座標  final int oldChoose = choose;  final OnTouchingLetterChangedListener listener = onTouchingLetterChangedListener;  final int c = (int) (y / getHeight() * b.length);// 點選y座標所佔總高度的比例*b陣列的長度就等於點選b中的個數.  switch (action) {  case MotionEvent.ACTION_UP:   setBackgroundDrawable(new ColorDrawable(0x00000000));   choose = -1;//   invalidate();   if (mTextDialog != null) {    mTextDialog.setVisibility(View.INVISIBLE);   }   break;  default:   setBackgroundResource(R.drawable.sidebar_background);   if (oldChoose != c) {    if (c >= 0 && c < b.length) {     if (listener != null) {      listener.onTouchingLetterChanged(b[c]);     }     if (mTextDialog != null) {      mTextDialog.setText(b[c]);      mTextDialog.setVisibility(View.VISIBLE);     }          choose = c;     invalidate();    }   }   break;  }  return true; } /**  * 向外公開的方法  *   * @param onTouchingLetterChangedListener  */ public void setOnTouchingLetterChangedListener(   OnTouchingLetterChangedListener onTouchingLetterChangedListener) {  this.onTouchingLetterChangedListener = onTouchingLetterChangedListener; } /**  * 介面  *   * @author coder  *   */ public interface OnTouchingLetterChangedListener {  public void onTouchingLetterChanged(String s); }}

3.CharacterParser 這個類是將漢字轉換成拼音的類，該拼音沒有聲調的，該類是單例類，其中定義了三個方法，在這個demo中用到的是getSelling(String chs)方法，將片語轉換成拼音

package com.example.sortlistview;/** * Java漢字轉換為拼音 *  */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; } /** * 漢字轉成ASCII碼 * * @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; } /** * 單字解析 * * @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; } /** * 片語解析 * * @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.ClearEditText類是自定義的一個在右側有刪除圖片的EditText，當然你也可以用Android原生的EditText，該類我之前有介紹，我這裡就不貼上程式碼了Android 帶清除功能的輸入框控制元件ClearEditText,仿IOS的輸入框

5.SortAdapter 資料的介面卡類，該類需要實現SectionIndexer介面，該介面是用來控制ListView分組的，該介面有三個方法getSectionForPosition(int position)，getPositionForSection(int section)，getSections()，我們只需要自行實現前面兩個方法

• getSectionForPosition(int position)是根據ListView的position來獲取該位置上面的name的首字母char的ascii值，例如： 如果該position上面的name是阿妹，首字母就是A，那麼此方法返回的就是'A'字母的ascii值，也就是65， 'B'是66，依次類推
• getPositionForSection(int section)就是根據首字母的ascii值來獲取在該ListView中第一次出現該首字母的位置，例如：從上面的效果圖1中，如果section是66 ，也就是‘B’的ascii值，那麼該方法返回的position就是2

然後就是getView()方法，首先我們根據ListView的position呼叫getSectionForPosition(int position)來獲取該位置上面name的首字母的ascii值,然後根據這個ascii值呼叫getPositionForSection(int section)來獲取第一次出現該首字母的position，如果ListView的position 等於 根據這個ascii值呼叫getPositionForSection(int section)來獲取第一次出現該首字母的position，則顯示分類字母 否則隱藏

package com.example.sortlistview;import java.util.List;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.SectionIndexer;import android.widget.TextView;public class SortAdapter extends BaseAdapter implements SectionIndexer{ private List<SortModel> list = null; private Context mContext;  public SortAdapter(Context mContext, List<SortModel> list) {  this.mContext = mContext;  this.list = list; }  /**  * 當ListView資料發生變化時,呼叫此方法來更新ListView  * @param list  */ public void updateListView(List<SortModel> list){  this.list = list;  notifyDataSetChanged(); } public int getCount() {  return this.list.size(); } public Object getItem(int position) {  return list.get(position); } public long getItemId(int position) {  return position; } public View getView(final int position, View view, ViewGroup arg2) {  ViewHolder viewHolder = null;  final SortModel mContent = list.get(position);  if (view == null) {   viewHolder = new ViewHolder();   view = LayoutInflater.from(mContext).inflate(R.layout.item, null);   viewHolder.tvTitle = (TextView) view.findViewById(R.id.title);   viewHolder.tvLetter = (TextView) view.findViewById(R.id.catalog);   view.setTag(viewHolder);  } else {   viewHolder = (ViewHolder) view.getTag();  }    //根據position獲取分類的首字母的char ascii值  int section = getSectionForPosition(position);    //如果當前位置等於該分類首字母的Char的位置 ，則認為是第一次出現  if(position == getPositionForSection(section)){   viewHolder.tvLetter.setVisibility(View.VISIBLE);   viewHolder.tvLetter.setText(mContent.getSortLetters());  }else{   viewHolder.tvLetter.setVisibility(View.GONE);  }   viewHolder.tvTitle.setText(this.list.get(position).getName());    return view; }  final static class ViewHolder {  TextView tvLetter;  TextView tvTitle; } /**  * 根據ListView的當前位置獲取分類的首字母的char ascii值  */ public int getSectionForPosition(int position) {  return list.get(position).getSortLetters().charAt(0); } /**  * 根據分類的首字母的Char ascii值獲取其第一次出現該首字母的位置  */ public int getPositionForSection(int section) {  for (int i = 0; i < getCount(); i++) {   String sortStr = list.get(i).getSortLetters();   char firstChar = sortStr.toUpperCase().charAt(0);   if (firstChar == section) {    return i;   }  }    return -1; }  @Override public Object[] getSections() {  return null; }}