1、实现效果
2、实现主要时一个listView或者recyclerView跟一个自定义右边a-z的显示自定义view实现，首先自定义view实现
首先绘制右边栏a-#,通过获取屏幕的高度然后计算每个字母的高度进行绘制
@Override
protected void onDraw(Canvas canvas) {
int perTextHeight = getHeight() / letters.length;
for (int i = 0; i 触摸点击右边栏的时候改变点击的字母背景颜色，然后进行绘制
@Override
public boolean onTouchEvent(MotionEvent event) {
int perTextHeight = getHeight() / letters.length;
float y = event.getY();
int currentPosition = (int) (y / perTextHeight);
if (currentPosition > -1 && currentPosition -1 && currentPosition 自定义view代码实现
package org.mobiletrain.letterindex;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.widget.TextView;
/**
*
*/
public class LetterIndexView extends View {
//当前手指滑动到的位置
private int choosedPosition = -1;
//画文字的画笔
private Paint paint;
//右边的所有文字
private String[] letters = new String[]{"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", "#"};
//页面正中央的TextView，用来显示手指当前滑动到的位置的文本
private TextView textViewDialog;
//接口变量，该接口主要用来实现当手指在右边的滑动控件上滑动时ListView能够跟着滚动
private UpdateListView updateListView;
public LetterIndexView(Context context) {
this(context, null);
}
public LetterIndexView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public LetterIndexView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
paint = new Paint();
paint.setAntiAlias(true);
paint.setTextSize(24);
}
public void setTextViewDialog(TextView textViewDialog) {
this.textViewDialog = textViewDialog;
}
@Override
protected void onDraw(Canvas canvas) {
int perTextHeight = getHeight() / letters.length;
for (int i = 0; i -1 && currentPosition -1 && currentPosition 3、创建一个数据类，前面数据可自行定义，pinyin和firstLetter是间隔的字母和数据首字母设置
package org.mobiletrain.letterindex;
/**
* Created by ning on 2016/4/24.
*/
public class User {
private int img;
private String username;
private String pinyin;
private String firstLetter;
public User() {
}
public String getFirstLetter() {
return firstLetter;
}
public void setFirstLetter(String firstLetter) {
this.firstLetter = firstLetter;
}
public int getImg() {
return img;
}
public void setImg(int img) {
this.img = img;
}
public String getPinyin() {
return pinyin;
}
public void setPinyin(String pinyin) {
this.pinyin = pinyin;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public User(String firstLetter, int img, String pinyin, String username) {
this.firstLetter = firstLetter;
this.img = img;
this.pinyin = pinyin;
this.username = username;
}
}
4、由于很多时候数据是中文的需要解析首字母是什么，所有用到chineseToPinyinHelper类
package org.mobiletrain.letterindex;
/**
* Java汉字转换为拼音
* created by 王松
*/
public class ChineseToPinyinHelper {
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 ChineseToPinyinHelper characterParser = new ChineseToPinyinHelper();
public static ChineseToPinyinHelper 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 getPinyin(String chs) {
String key, value;
buffer = new StringBuilder();
for (int i = 0; i = 2) {
value = (String) convert(key);
if (value == null) {
value = "unknown";
}
} else {
value = key;
}
buffer.append(value);
}
return buffer.toString();
}
public String getSpelling() {
return this.getPinyin(this.getResource());
}
}
5、代码布局实现
6、主要代码实现，adapter实现,通过继承sectionIndexer得到两个方法，可以获取当前位置的数据所在分组和知道传入分组值获得第一个的位置。
//传入一个分组值[A....Z],获得该分组的第一项的position
@Override
public int getPositionForSection(int sectionIndex) {
if (list!=null && list.size()>0) {
for (int i = 0; i 0) {
return list.get(position).getFirstLetter().charAt(0);
}
return 0;
} 完整代码
package org.mobiletrain.letterindex;
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;
import java.util.List;
/**
* Created by wangsong on 2016/4/24.
*/
public class MyAdapter extends BaseAdapter implements SectionIndexer {
private List list;
private Context context;
private LayoutInflater inflater;
public MyAdapter(Context context, List list) {
this.cOntext= context;
this.list = list;
inflater = LayoutInflater.from(context);
}
@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 holder;
if (cOnvertView== null) {
cOnvertView= inflater.inflate(R.layout.listview_item, null);
holder = new ViewHolder();
holder.showLetter = (TextView) convertView.findViewById(R.id.show_letter);
holder.username = (TextView) convertView.findViewById(R.id.username);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
User user = list.get(position);
holder.username.setText(user.getUsername());
//获得当前position是属于哪个分组
int sectiOnForPosition= getSectionForPosition(position);
//获得该分组第一项的position
int positiOnForSection= getPositionForSection(sectionForPosition);
//查看当前position是不是当前item所在分组的第一个item
//如果是，则显示showLetter，否则隐藏
if (position == positionForSection) {
holder.showLetter.setVisibility(View.VISIBLE);
holder.showLetter.setText(user.getFirstLetter());
} else {
holder.showLetter.setVisibility(View.GONE);
}
return convertView;
}
@Override
public Object[] getSections() {
return new Object[0];
}
//传入一个分组值[A....Z],获得该分组的第一项的position
@Override
public int getPositionForSection(int sectionIndex) {
if (list!=null && list.size()>0) {
for (int i = 0; i 0) {
return list.get(position).getFirstLetter().charAt(0);
}
return 0;
}
class ViewHolder {
TextView username, showLetter;
}
} 7、主要代码实现
letterIndexView.setUpdateListView(new LetterIndexView.UpdateListView() {
@Override
public void updateListView(String currentChar) {
int positiOnForSection= adapter.getPositionForSection(currentChar.charAt(0));
listView.setSelection(positionForSection);
}
});这里主要实现了当手指点击哪个字母的时候可以让listView数据跳到对应位置
listView.setOnScrollListener(new AbsListView.OnScrollListener() {
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
}
@Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
int sectiOnForPosition= adapter.getSectionForPosition(firstVisibleItem);
letterIndexView.updateLetterIndexView(sectionForPosition);
}
});上面代码主要是可以实现当数据滑动的时候到达不同首字母位置时右边栏滑动到对应位置
下面代码主要通过将数据转成字母，然后截取第一个字母跟a-z对比然后保存
for (String allUserName : allUserNames) {
User user = new User();
user.setUsername(allUserName);
String cOnvert= ChineseToPinyinHelper.getInstance().getPinyin(allUserName).toUpperCase();
Log.e("nsc","cOnvert="+convert);
user.setPinyin(convert);
String substring = convert.substring(0, 1);
if (substring.matches("[A-Z]")) {
user.setFirstLetter(substring);
}else{
user.setFirstLetter("#");
}
list.add(user);
}
Collections.sort(list, new Comparator() {
@Override
public int compare(User lhs, User rhs) {
if (lhs.getFirstLetter().contains("#")) {
return 1;
} else if (rhs.getFirstLetter().contains("#")) {
return -1;
}else{
return lhs.getFirstLetter().compareTo(rhs.getFirstLetter());
}
}
});
最终要实现上图效果需要上面代码对数据进行类型排序。
完整代码
package org.mobiletrain.letterindex;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.AbsListView;
import android.widget.ListView;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
public class MainActivity extends AppCompatActivity {
private List list;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final ListView listView = (ListView) findViewById(R.id.lv);
initData();
final MyAdapter adapter = new MyAdapter(this, list);
listView.setAdapter(adapter);
TextView textView = (TextView) findViewById(R.id.show_letter_in_center);
final LetterIndexView letterIndexView = (LetterIndexView) findViewById(R.id.letter_index_view);
letterIndexView.setTextViewDialog(textView);
letterIndexView.setUpdateListView(new LetterIndexView.UpdateListView() {
@Override
public void updateListView(String currentChar) {
int positiOnForSection= adapter.getPositionForSection(currentChar.charAt(0));
listView.setSelection(positionForSection);
}
});
listView.setOnScrollListener(new AbsListView.OnScrollListener() {
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
}
@Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
int sectiOnForPosition= adapter.getSectionForPosition(firstVisibleItem);
letterIndexView.updateLetterIndexView(sectionForPosition);
}
});
}
private void initData() {
list = new ArrayList<>();
String[] allUserNames = getResources().getStringArray(R.array.arrUsernames);
for (String allUserName : allUserNames) {
User user = new User();
user.setUsername(allUserName);
String cOnvert= ChineseToPinyinHelper.getInstance().getPinyin(allUserName).toUpperCase();
Log.e("nsc","cOnvert="+convert);
user.setPinyin(convert);
String substring = convert.substring(0, 1);
if (substring.matches("[A-Z]")) {
user.setFirstLetter(substring);
}else{
user.setFirstLetter("#");
}
list.add(user);
}
Collections.sort(list, new Comparator() {
@Override
public int compare(User lhs, User rhs) {
if (lhs.getFirstLetter().contains("#")) {
return 1;
} else if (rhs.getFirstLetter().contains("#")) {
return -1;
}else{
return lhs.getFirstLetter().compareTo(rhs.getFirstLetter());
}
}
});
}
} 代码下载地址：
http://download.csdn.net/detail/u011324501/9872790
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