城市列表-根据拼音首字母排序

今天我们就简单的实现一下城市的排序 读取我们城市的信息并通过listview展示 首先看一下我们的布局文件

<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"
    >
    <FrameLayout 
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        >
        <ListView 
            android:id="@+id/lv"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_gravity="center"
            android:divider="@null"
            ></ListView>
     </FrameLayout>
</LinearLayout>

我们看到布局文件中就是一个展示列表的listView
下面看一下我们需要展示的城市的列表信息 在values文件夹下面创建一个xml文件名称叫做 arrays.xml

<?xml version="1.0" encoding="UTF-8"?>
<resources>

    <string-array name="date">
          <item>北京首都</item>  
    <item>上海虹桥</item>  
    <item>上海浦东</item>  
    <item>广州</item>  
    <item>深圳</item>  
    <item>香港</item>  
    <item>澳门</item>  
    <item>天津</item>  
    <item>成都</item>  
    <item>重庆</item>  
    <item>南京</item>  
    <item>青岛</item>  
    <item>珠海</item>  
    <item>福州</item>  
    <item>哈尔滨</item>  
    <item>大连</item>  
    <item>海口</item>  
    <item>沈阳</item>  
    <item>厦门</item>  
    <item>安庆</item>  
    <item>鞍山</item>  
    <item>阿克苏</item>  
    <item>阿勒泰</item>  
    <item>安康</item>  
    <item>北京首都</item>  
    <item>北京南苑</item>  
    <item>保山</item>  
    <item>包头</item>  
    <item>北海</item>  
    <item>蚌埠</item>  
    <item>重庆</item>  
    <item>成都</item>  
    <item>长沙</item>  
    <item>长春</item>  
    <item>常德</item>  
    <item>长治</item>  
    <item>常州</item>  
    <item>朝阳</item>  
    <item>赤峰</item>  
    <item>大连</item>  
    <item>敦煌</item>  
    <item>大理</item>  
    <item>达县</item>  
    <item>东营</item>  
    <item>丹东</item>  
    <item>大同</item>  
    <item>恩施</item>  
    <item>福州</item>  
    <item>阜阳</item>  
    <item>富蕴</item>  
    <item>广州</item>  
    <item>桂林</item>  
    <item>贵阳</item>  
    <item>格尔木</item>  
    <item>广汉</item>  
    <item>赣州</item>  
    <item>海口</item>  
    <item>哈尔滨</item>  
    <item>杭州</item>  
    <item>合肥</item>  
    <item>黄山</item>  
    <item>呼和浩特</item>  
    <item>海拉尔</item>  
    <item>哈密</item>  
    <item>汉中</item>  
    <item>黑河</item>  
    <item>衡阳</item>  
    <item>和田</item>  
    <item>黄岩</item>  
    <item>吉林</item>  
    <item>济南</item>  
    <item>九江</item>  
    <item>九寨黄龙</item>  
    <item>吉安</item>  
    <item>佳木斯</item>  
    <item>嘉峪关</item>  
    <item>济宁</item>  
    <item>景德镇</item>  
    <item>景洪</item>  
    <item>晋江</item>  
    <item>锦州</item>  
    <item>酒泉</item>  
    <item>昆明</item>  
    <item>克拉玛依</item>  
    <item>喀什</item>  
    <item>库尔勒</item>  
    <item>库车</item>  
    <item>洛阳</item>  
    <item>兰州</item>  
    <item>拉萨</item>  
    <item>连云港</item>  
    <item>丽江</item>  
    <item>临沂</item>  
    <item>柳州</item>  
    <item>泸州</item>  
    <item>芒市</item>  
    <item>梅县</item>  
    <item>绵阳</item>  
    <item>牡丹江</item>  
    <item>满洲里</item>  
    <item>南京</item>  
    <item>宁波</item>  
    <item>南昌</item>  
    <item>南宁</item>  
    <item>南通</item>  
    <item>南充</item>  
    <item>南阳</item>  
    <item>青岛</item>  
    <item>秦皇岛</item>  
    <item>齐齐哈尔</item>  
    <item>泉州</item>  
    <item>衢州</item>  
    <item>且末</item>  
    <item>庆阳</item>  
    <item>沈阳</item>  
    <item>深圳</item>  
    <item>上海虹桥</item>  
    <item>上海浦东</item>  
    <item>汕头</item>  
    <item>石家庄</item>  
    <item>苏州</item>  
    <item>三亚</item>  
    <item>沙市</item>  
    <item>思茅</item>  
    <item>天津</item>  
    <item>塔城</item>  
    <item>太原</item>  
    <item>通化</item>  
    <item>通辽</item>  
    <item>铜仁</item>  
    <item>温州</item>  
    <item>武汉</item>  
    <item>武汉王家</item>  
    <item>无锡</item>  
    <item>乌鲁木齐</item>  
    <item>威海</item>  
    <item>梧州</item>  
    <item>万县</item>  
    <item>潍坊</item>  
    <item>乌兰浩特</item>  
    <item>武夷山</item>  
    <item>厦门</item>  
    <item>徐州</item>  
    <item>西安</item>  
    <item>西宁</item>  
    <item>西昌</item>  
    <item>襄樊</item>  
    <item>锡林浩特</item>  
    <item>银川</item>  
    <item>延安</item>  
    <item>延吉</item>  
    <item>烟台</item>  
    <item>盐城</item>  
    <item>宜宾</item>  
    <item>宜昌</item>  
    <item>伊宁</item>  
    <item>义乌</item>  
    <item>永州</item>  
    <item>榆林</item>  
    <item>珠海</item>  
    <item>昭通</item>  
    <item>张家界</item>  
    <item>湛江</item>  
    <item>芷江</item>  
    <item>中甸</item>  
    <item>舟山</item>  
    <item>遵义</item>  
    <item>郑州</item>  
    </string-array>
</resources>

下面我们就对这个数据进行一系列化的操作

首先就是读取我们的城市列表

import java.util.ArrayList;
import java.util.List;

public class getCityList {
    private CharacterParser characterParser;
    public getCityList(CharacterParser characterParser) {
        super();
        this.characterParser = characterParser;
    }
    /**
     * 为ListView填充数据
     * 
     * @param date
     * @return
     */
    public List<CityData> filledData(String[] date) {
        List<CityData> mSortList = new ArrayList<CityData>();

        for (int i = 0; i < date.length; i++) {
            CityData cityData = new CityData();
            cityData.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]")) {
                cityData.setFristA(sortString.toUpperCase());
            } else {
                cityData.setFristA("#");
            }
            mSortList.add(cityData);
        }
        return mSortList;
    }
}

读取完成之后我们需要在主方法中实现调用
下面看一下我们主类中的实现代码

import java.util.Collections;
import java.util.List;
import android.app.Activity;
import android.os.Bundle;
import android.widget.ListView;

public class MainActivity extends Activity {
    private ListView lv;//列表的控件
    private MyCityAdapter adapter;//适配器
    private List<CityData> citylist;//列表集合
    /**
     * 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);
        initData();
    }

    private void initData() {
        // 绑定控件
        lv = (ListView) findViewById(R.id.lv);
        // 实例化汉字转拼音类
        characterParser = CharacterParser.getInstance();
        pinyinComparator = new PinyinComparator();
        getCity();

    }
    /**
     * 获得城市列表并添加到适配器
     */
    private void getCity() {
        // 获取城市的信息
        getCityList cityList = new getCityList(characterParser);
        // 获得城市的数据列表
        citylist = cityList.filledData(getResources().getStringArray(
                R.array.date));
        // 根据a-z进行排序源数据
        Collections.sort(citylist, pinyinComparator);
        adapter = new MyCityAdapter(MainActivity.this, citylist);
        lv.setAdapter(adapter);
    }
}

在主类中我们看到 我们将读取的城市汉字首先转换为拼音

/**
 * 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());
    }

}

转换成拼音之后我们要根据拼音排序 看一下我们排序的代码

import java.util.Comparator;

public class PinyinComparator implements Comparator<CityData> {

    public int compare(CityData o1, CityData o2) {
        if (o1.getFristA().equals("@")
                || o2.getFristA().equals("#")) {
            return -1;
        } else if (o1.getFristA().equals("#")
                || o2.getFristA().equals("@")) {
            return 1;
        } else {
            return o1.getFristA().compareTo(o2.getFristA());
        }
    }

}

除了上面的我们需要对城市的信息封装一下城市的名称和城市的拼音首字母 封装类如下所示

public class CityData {
    private String name;//城市的名称
    private String fristA;//城市的首字母
    //封装
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getFristA() {
        return fristA;
    }
    public void setFristA(String fristA) {
        this.fristA = fristA;
    }
}

展示数据自然是少不了我们的适配器

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.TextView;

public class MyCityAdapter extends BaseAdapter {
    private Context context;
    private List<CityData> list=null;
    //生成构造
    public MyCityAdapter(Context context, List<CityData> list) {
        super();
        this.context = context;
        this.list = list;
    }

    /**
     * 当ListView数据发生变化时,调用此方法来更新ListView
     * @param list
     */
    public void updateListView(List<CityData> list){
        this.list = list;
        notifyDataSetChanged();
    }

    @Override
    public int getCount() {
        return list.size();
    }

    @Override
    public Object getItem(int position) {
        return list.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder viewHolder = null;
        final CityData mContent = list.get(position);
        if (convertView == null) {
            viewHolder = new ViewHolder();
            convertView = LayoutInflater.from(context).inflate(R.layout.item, null);
            viewHolder.tvTitle = (TextView) convertView.findViewById(R.id.title);
            viewHolder.tvLetter = (TextView) convertView.findViewById(R.id.catalog);
            convertView.setTag(viewHolder);
        } else {
            viewHolder = (ViewHolder) convertView.getTag();
        }

        //根据position获取分类的首字母的Char ascii值
        int section = getSectionForPosition(position);

        //如果当前位置等于该分类首字母的Char的位置 ，则认为是第一次出现
        if(position == getPositionForSection(section)){
            viewHolder.tvLetter.setVisibility(View.VISIBLE);
            viewHolder.tvLetter.setText(mContent.getFristA());
        }else{
            viewHolder.tvLetter.setVisibility(View.GONE);
        }

        viewHolder.tvTitle.setText(this.list.get(position).getName());

        return convertView;

    }

    final static class ViewHolder {
        TextView tvLetter;
        TextView tvTitle;
    }


    /**
     * 根据ListView的当前位置获取分类的首字母的Char ascii值
     */
    public int getSectionForPosition(int position) {
        return list.get(position).getFristA().charAt(0);
    }

    /**
     * 根据分类的首字母的Char ascii值获取其第一次出现该首字母的位置
     */
    public int getPositionForSection(int section) {
        for (int i = 0; i < getCount(); i++) {
            String sortStr = list.get(i).getFristA();
            char firstChar = sortStr.toUpperCase().charAt(0);
            if (firstChar == section) {
                return i;
            }
        }

        return -1;
    }

    /**
     * 提取英文的首字母，非英文字母用#代替。
     * 
     * @param str
     * @return
     */
    private String getAlpha(String str) {
        String  sortStr = str.trim().substring(0, 1).toUpperCase();
        // 正则表达式，判断首字母是否是英文字母
        if (sortStr.matches("[A-Z]")) {
            return sortStr;
        } else {
            return "#";
        }
    }

    public Object[] getSections() {
        return null;
    }

}

下面展示一下我们item布局中的代码

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:gravity="center_vertical"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/catalog"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:background="#E0E0E0"
        android:textColor="#454545"
        android:layout_weight="1.0"
        android:paddingLeft="5dip"
        android:paddingTop="5dip"
        android:paddingBottom="5dip"
        android:text="A"/>

    <TextView
        android:id="@+id/title"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_gravity="center_vertical"
        android:gravity="center_vertical"
        android:layout_weight="1.0"
        android:textColor="#336598"
        android:layout_marginLeft="5dip"
        android:paddingTop="10dip"
        android:paddingBottom="10dip"
        android:text="hhhh"/>

</LinearLayout>

上面的这么多的代码就换来我们下面这个代码 让我们一起看一看吧