android 右边滑动字母索引使用
来源：互联网 发布：程序员教程第四版pdf 编辑：程序博客网 时间：2024/06/09 23:23
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 < letters.length; i++) { if (i == choosedPosition) { paint.setColor(Color.RED); } else { paint.setColor(Color.BLACK); } canvas.drawText(letters[i], (getWidth() - paint.measureText(letters[i])) / 2, (i + 1) * perTextHeight, paint); } }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 < letters.length) { String letter = letters[currentPosition]; switch (event.getAction()) { case MotionEvent.ACTION_UP: setBackgroundColor(Color.TRANSPARENT); if (textViewDialog != null) { textViewDialog.setVisibility(View.GONE); } break; default: setBackgroundColor(Color.parseColor("#cccccc")); if (currentPosition > -1 && currentPosition < letters.length) { if (textViewDialog != null) { textViewDialog.setVisibility(View.VISIBLE); textViewDialog.setText(letter); } if (updateListView != null) { updateListView.updateListView(letter); } choosedPosition = currentPosition; } break; } invalidate(); } return true; }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 < letters.length; i++) { if (i == choosedPosition) { paint.setColor(Color.RED); } else { paint.setColor(Color.BLACK); } canvas.drawText(letters[i], (getWidth() - paint.measureText(letters[i])) / 2, (i + 1) * perTextHeight, paint); } } @Override public boolean onTouchEvent(MotionEvent event) { int perTextHeight = getHeight() / letters.length; float y = event.getY(); int currentPosition = (int) (y / perTextHeight); if (currentPosition > -1 && currentPosition < letters.length) { String letter = letters[currentPosition]; switch (event.getAction()) { case MotionEvent.ACTION_UP: setBackgroundColor(Color.TRANSPARENT); if (textViewDialog != null) { textViewDialog.setVisibility(View.GONE); } break; default: setBackgroundColor(Color.parseColor("#cccccc")); if (currentPosition > -1 && currentPosition < letters.length) { if (textViewDialog != null) { textViewDialog.setVisibility(View.VISIBLE); textViewDialog.setText(letter); } if (updateListView != null) { updateListView.updateListView(letter); } choosedPosition = currentPosition; } break; } invalidate(); } return true; } public void setUpdateListView(UpdateListView updateListView) { this.updateListView = updateListView; } public interface UpdateListView { void updateListView(String currentChar); } public void updateLetterIndexView(int currentChar) { for (int i = 0; i < letters.length; i++) { if (currentChar == letters[i].charAt(0)) { choosedPosition = i; invalidate(); break; } } }}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 < 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.getPinyin(this.getResource()); }}5、代码布局实现<?xml version="1.0" encoding="utf-8"?><RelativeLayout 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" tools:context="org.mobiletrain.letterindex.MainActivity"> <ListView android:id="@+id/lv" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingLeft="12dp" android:paddingRight="36dp"></ListView> <org.mobiletrain.letterindex.LetterIndexView android:id="@+id/letter_index_view" android:layout_width="36dp" android:layout_height="match_parent" android:layout_alignParentRight="true"/> <TextView android:id="@+id/show_letter_in_center" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:background="@drawable/voip_toast_bg" android:gravity="center" android:visibility="gone"/></RelativeLayout>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 < list.size(); i++) { if (list.get(i).getFirstLetter().charAt(0) == sectionIndex) { return i; } } } return -1; } //传入一个position，获得该position所在的分组 @Override public int getSectionForPosition(int position) { if (list!=null && list.size()>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<User> list; private Context context; private LayoutInflater inflater; public MyAdapter(Context context, List<User> 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 < list.size(); i++) { if (list.get(i).getFirstLetter().charAt(0) == sectionIndex) { return i; } } } return -1; } //传入一个position，获得该position所在的分组 @Override public int getSectionForPosition(int position) { if (list!=null && list.size()>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<User>() { @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<User> 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<User>() { @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阅读全文
0 0
- android 右边滑动字母索引使用
- Android 自定义View字母滑动索引
- Android获取通讯录联系人，右侧字母滑动索引
- Android获取通讯录联系人，右侧字母滑动索引
- android 字母索引 listview
- Android字母索引列表
- 微信联系人右侧字母滑动索引
- 微信联系人右侧字母滑动索引
- 仿微信联系人列表滑动字母索引
- Android下使用Unicode码对中文创建字母索引
- 高仿android通讯录--右边字母排序功能
- android ListViewA-Z字母索引
- Android 仿联系人字母索引
- [Android开发] 在项目中快速实现 列表字母排序滑动索引 功能原理以及过程代码
- Android 仿微信右侧字母滑动联系人
- [Android实例] 侧边字母滑动检索控件
- 仿通讯录快速索引的实现原理(包括中间的字母图和右边的索引条),例IndexableListView
- Android UI ListView实现字母索引 定位
- 我的第一个博客（浅谈setTimeout）
- 白鹿原（小说）------情色部分大盘点
- 第1课、创建最简窗口程序
- 每天学一点Swift----泛型(二)
- C++ STL--map容器
- android 右边滑动字母索引使用
- 前台js获取到后台json数据，eval解析json后，日期（object）对象转换为date日期格式显示
- 170615 逆向-10000000
- 高级软件工程考察报告
- ListView控件的使用
- webview收不到服务端的cookie
- 自然归并排序和单链表实现的归并排序
- Activity的生命周期
- hdu 1181
