編輯：關於Android編程
今天我們就簡單的實現一下城市的排序 讀取我們城市的信息並通過listview展示 首先看一下我們的布局文件
<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>
我們看到布局文件中就是一個展示列表的listView
下面看一下我們需要展示的城市的列表信息 在values文件夾下面創建一個xml文件名稱叫做 arrays.xml
<?xml version="1.0" encoding="UTF-8"?>
<resources>
<string-array name="date">
<item>北京首都</item>
<item>上海虹橋</item>
<item>上海浦東</item>
<item>廣州</item>
<item>深圳</item>
<item>香港</item>
<item>澳門</item>
<item>天津</item>
<item>成都</item>
<item>重慶</item>
<item>南京</item>
<item>青島</item>
<item>珠海</item>
<item>福州</item>
<item>哈爾濱</item>
<item>大連</item>
<item>海口</item>
<item>沈陽</item>
<item>廈門</item>
<item>安慶</item>
<item>鞍山</item>
<item>阿克蘇</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>包頭</item>
<item>北海</item>
<item>蚌埠</item>
<item>重慶</item>
<item>成都</item>
<item>長沙</item>
<item>長春</item>
<item>常德</item>
<item>長治</item>
<item>常州</item>
<item>朝陽</item>
<item>赤峰</item>
<item>大連</item>
<item>敦煌</item>
<item>大理</item>
<item>達縣</item>
<item>東營</item>
<item>丹東</item>
<item>大同</item>
<item>恩施</item>
<item>福州</item>
<item>阜陽</item>
<item>富蘊</item>
<item>廣州</item>
<item>桂林</item>
<item>貴陽</item>
<item>格爾木</item>
<item>廣漢</item>
<item>贛州</item>
<item>海口</item>
<item>哈爾濱</item>
<item>杭州</item>
<item>合肥</item>
<item>黃山</item>
<item>呼和浩特</item>
<item>海拉爾</item>
<item>哈密</item>
<item>漢中</item>
<item>黑河</item>
<item>衡陽</item>
<item>和田</item>
<item>黃巖</item>
<item>吉林</item>
<item>濟南</item>
<item>九江</item>
<item>九寨黃龍</item>
<item>吉安</item>
<item>佳木斯</item>
<item>嘉峪關</item>
<item>濟寧</item>
<item>景德鎮</item>
<item>景洪</item>
<item>晉江</item>
<item>錦州</item>
<item>酒泉</item>
<item>昆明</item>
<item>克拉瑪依</item>
<item>喀什</item>
<item>庫爾勒</item>
<item>庫車</item>
<item>洛陽</item>
<item>蘭州</item>
<item>拉薩</item>
<item>連雲港</item>
<item>麗江</item>
<item>臨沂</item>
<item>柳州</item>
<item>泸州</item>
<item>芒市</item>
<item>梅縣</item>
<item>綿陽</item>
<item>牡丹江</item>
<item>滿洲裡</item>
<item>南京</item>
<item>寧波</item>
<item>南昌</item>
<item>南寧</item>
<item>南通</item>
<item>南充</item>
<item>南陽</item>
<item>青島</item>
<item>秦皇島</item>
<item>齊齊哈爾</item>
<item>泉州</item>
<item>衢州</item>
<item>且末</item>
<item>慶陽</item>
<item>沈陽</item>
<item>深圳</item>
<item>上海虹橋</item>
<item>上海浦東</item>
<item>汕頭</item>
<item>石家莊</item>
<item>蘇州</item>
<item>三亞</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>通遼</item>
<item>銅仁</item>
<item>溫州</item>
<item>武漢</item>
<item>武漢王家</item>
<item>無錫</item>
<item>烏魯木齊</item>
<item>威海</item>
<item>梧州</item>
<item>萬縣</item>
<item>濰坊</item>
<item>烏蘭浩特</item>
<item>武夷山</item>
<item>廈門</item>
<item>徐州</item>
<item>西安</item>
<item>西寧</item>
<item>西昌</item>
<item>襄樊</item>
<item>錫林浩特</item>
<item>銀川</item>
<item>延安</item>
<item>延吉</item>
<item>煙台</item>
<item>鹽城</item>
<item>宜賓</item>
<item>宜昌</item>
<item>伊寧</item>
<item>義烏</item>
<item>永州</item>
<item>榆林</item>
<item>珠海</item>
<item>昭通</item>
<item>張家界</item>
<item>湛江</item>
<item>芷江</item>
<item>中甸</item>
<item>舟山</item>
<item>遵義</item>
<item>鄭州</item>
</string-array>
</resources>
下面我們就對這個數據進行一系列化的操作
首先就是讀取我們的城市列表
import java.util.ArrayList;
import java.util.List;
public class getCityList {
private CharacterParser characterParser;
public getCityList(CharacterParser characterParser) {
super();
this.characterParser = characterParser;
}
/**
* 為ListView填充數據
*
* @param date
* @return
*/
public List filledData(String[] date) {
List mSortList = new ArrayList();
for (int i = 0; i < date.length; i++) {
CityData cityData = new CityData();
cityData.setName(date[i]);
// 漢字轉換成拼音
String pinyin = characterParser.getSelling(date[i]);
String sortString = pinyin.substring(0, 1).toUpperCase();
// 正則表達式，判斷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;
}
}
讀取完成之後我們需要在主方法中實現調用
下面看一下我們主類中的實現代碼
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;//適配器
private List citylist;//列表集合
/**
* 漢字轉換成拼音的類
*/
private CharacterParser characterParser;
/**
* 根據拼音來排列ListView裡面的數據類
*/
private PinyinComparator pinyinComparator;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initData();
}
private void initData() {
// 綁定控件
lv = (ListView) findViewById(R.id.lv);
// 實例化漢字轉拼音類
characterParser = CharacterParser.getInstance();
pinyinComparator = new PinyinComparator();
getCity();
}
/**
* 獲得城市列表並添加到適配器
*/
private void getCity() {
// 獲取城市的信息
getCityList cityList = new getCityList(characterParser);
// 獲得城市的數據列表
citylist = cityList.filledData(getResources().getStringArray(
R.array.date));
// 根據a-z進行排序源數據
Collections.sort(citylist, pinyinComparator);
adapter = new MyCityAdapter(MainActivity.this, citylist);
lv.setAdapter(adapter);
}
}
在主類中我們看到 我們將讀取的城市漢字首先轉換為拼音
/**
* 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;
}
/** * 詞組解析 * * @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());
}
}
轉換成拼音之後我們要根據拼音排序 看一下我們排序的代碼
import java.util.Comparator;
public class PinyinComparator implements Comparator {
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());
}
}
}
除了上面的我們需要對城市的信息封裝一下城市的名稱和城市的拼音首字母 封裝類如下所示
public class CityData {
private String name;//城市的名稱
private String fristA;//城市的首字母
//封裝
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;
}
}
展示數據自然是少不了我們的適配器
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 list=null;
//生成構造
public MyCityAdapter(Context context, List list) {
super();
this.context = context;
this.list = list;
}
/**
* 當ListView數據發生變化時,調用此方法來更新ListView
* @param list
*/
public void updateListView(List 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.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).getFristA().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).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();
// 正則表達式，判斷首字母是否是英文字母
if (sortStr.matches("[A-Z]")) {
return sortStr;
} else {
return "#";
}
}
public Object[] getSections() {
return null;
}
}
下面展示一下我們item布局中的代碼
<?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>
上面的這麼多的代碼就換來我們下面這個代碼 讓我們一起看一看吧
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