ListView根据字母排列——仿照微信联系人

效果图如下：(如果不是你想要的可以绕道了...)

废话不多说了，我在完成这个功能时用到了Universal-Image-Loader这个工具，要是有不了解的可以参考我以前写的文章：Android-Universal-Image-Loader的使用方法（小白详解）了解一下，本文0分代码下载

最主要的是右侧的字母条形栏，交互功能是快速定位的功能，将list按照字母的顺序排列

/*** 主要组件,右侧的字母条形栏*/
public class SideBar extends View {// 触摸事件private OnTouchingLetterChangedListener onTouchingLetterChangedListener;/*** 26个字母+特殊的字符*/public static String[] Letters = { "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 letterSize = 20; // 字母的大小private String letterDefaultColor = "#999999"; // 字母默认颜色private String letterChooseColor = "#ffffff"; // 字母的大小private int choose = -1; // 选中private Paint paint = new Paint();/*** 选中字母时弹出的提示框，提示当前你选中的是哪个字母*/private TextView 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);}/*** 重写这个方法*/protected void onDraw(Canvas canvas) {super.onDraw(canvas);// 获取焦点改变背景颜色.int height = getHeight();// 获取对应高度int width = getWidth(); // 获取对应宽度int singleHeight = height / Letters.length;// 获取每一个字母的高度for (int i = 0; i < Letters.length; i++) {paint.setColor(Color.parseColor(letterDefaultColor));paint.setTypeface(Typeface.DEFAULT);paint.setAntiAlias(true);paint.setTextSize(letterSize);// 选中的状态字体颜色if (i == choose) {paint.setColor(Color.parseColor(letterChooseColor));paint.setFakeBoldText(true);}// x坐标等于中间-字符串宽度的一半.float xPos = width / 2 - paint.measureText(Letters[i]) / 2;float yPos = singleHeight * i + singleHeight;canvas.drawText(Letters[i], xPos, yPos, paint);paint.reset();// 重置画笔}}@Overridepublic boolean dispatchTouchEvent(MotionEvent event) {final int action = event.getAction();final float event_y = event.getY();// 点击y坐标final int oldChoose = choose;final OnTouchingLetterChangedListener listener = onTouchingLetterChangedListener;final int c = (int) (event_y / getHeight() * Letters.length);// 点击y坐标所占总高度的比例*b数组的长度就等于点击b中的个数.switch (action) {case MotionEvent.ACTION_UP:// 抬起setBackgroundColor(Color.argb(0, 0, 0, 0));choose = -1;//invalidate();if (mTextDialog != null) {mTextDialog.setVisibility(View.INVISIBLE);}break;default:setBackgroundColor(Color.argb(150, 0, 0, 0));if (oldChoose != c) {if (c >= 0 && c < Letters.length) {if (listener != null) {listener.onTouchingLetterChanged(Letters[c]);}if (mTextDialog != null) {mTextDialog.setText(Letters[c]);mTextDialog.setVisibility(View.VISIBLE);}choose = c;invalidate();}}break;}return true;}/*** 供外部调用，需要在外部设置选中字母时弹出的提示框，传入的是一个TextView* * @param mTextDialog*                外部定义好的提示框*/public void setTextDialog(TextView mTextDialog) {this.mTextDialog = mTextDialog;}/*** 向外公开的方法* * @param onTouchingLetterChangedListener*/public void setOnTouchingLetterChangedListener(OnTouchingLetterChangedListener onTouchingLetterChangedListener) {this.onTouchingLetterChangedListener = onTouchingLetterChangedListener;}/*** 接口* * @author coder* */public interface OnTouchingLetterChangedListener {public void onTouchingLetterChanged(String s);}
}

上面代码比较简单，就是自定义的View，其中最主要的方法是setOnTouchingLetterChangedListener（）设置一个监听，监听此时你触摸的位置是在哪个字母上。

接下来数据是按照字母的顺序排列的，这里我将数据列为一个类，再通过比较器的方法让它可以进行简单的排序。

/*** 需要排列的列表的内容（item项目对象）例如每个联系人显示头像和名称。 项目中需要是list中的每个item的内容。* * @author luckchoudog*/
public class ExampleModel {private String imgSrc; // 显示头像private String name; // 显示的内容private String sortLetters; // 显示数据拼音的首字母public String getImgSrc() {return imgSrc;}public void setImgSrc(String imgSrc) {this.imgSrc = imgSrc;}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;}
}

/*** 比较器，强行对某个对象进行整体排序的比较函数，强行按照自己的排序方式对对象进行排序。* 如果两个对象的首字母是@或者是#则靠后，否则按照a~z排序。**/
public class ModelComparator implements Comparator<ExampleModel> {/*** o1小于、等于或大于o2，分别返回负整数、零或正整数。*/public int compare(ExampleModel o1, ExampleModel o2) {if (o1.getSortLetters().equals("@") || o2.getSortLetters().equals("#")) {return -1;} else if (o1.getSortLetters().equals("#") || o2.getSortLetters().equals("@")) {return 1;} else {return o1.getSortLetters().compareTo(o2.getSortLetters());}}
}

这里的排序是第一个汉字字符不是字母的，将会排在最后。

下面这个方法是直接在网上搜集的，直接拿来用吧亲。。。功能是返回汉字的拼音

/*** 汉字拼音转换，是单例模式 以后不要再更改了，主要方法是返回汉字的拼音。*/
public class ChineseSpellParser {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 static ChineseSpellParser characterParser = new ChineseSpellParser();public static ChineseSpellParser getInstance() {return characterParser;}/*** 汉字转成ASCII码*/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* * @return 传入字的拼音*/private 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* * @return 传入词的拼音*/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();}
}

最后，最主要的功能，列表的适配Adapter

/*** 排序列表的适配器，*/
@SuppressLint("DefaultLocale")
public class SortListAdapter extends BaseAdapter implements SectionIndexer {private List<ExampleModel> list = null;private Context mContext;private DisplayImageOptions options; // DisplayImageOptions是用于设置图片显示的类private ImageLoader imageLoader = ImageLoader.getInstance();public SortListAdapter(Context mContext, List<ExampleModel> list) {this.mContext = mContext;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<ExampleModel> 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 ExampleModel mContent = list.get(position);if (view == null) {view = LayoutInflater.from(mContext).inflate(R.layout.ui_adapter_sortlist_item, null);// 设置item点击效果view.setBackgroundResource(R.drawable.ui_sortlist_item_select);viewHolder = new ViewHolder();viewHolder.initView(view, mContext);view.setTag(viewHolder);} else {viewHolder = (ViewHolder) view.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.topLetter.setVisibility(View.VISIBLE);viewHolder.topLetter.setText(mContent.getSortLetters());} else {viewHolder.topLetter.setVisibility(View.GONE);}viewHolder.name.setText(this.list.get(position).getName());// 设置图像// 给头像设置图片，如果已有缓存的则直接用缓存的options = new DisplayImageOptions.Builder().showImageOnFail(R.drawable.ic_launcher) // 设置图片在下载期间显示的图片.showImageForEmptyUri(R.drawable.ic_launcher)// 设置图片Uri为空或是错误的时候显示的图片.showImageOnFail(R.drawable.ic_launcher) // 设置图片加载/解码过程中错误时候显示的图片.cacheInMemory(true)// 设置下载的图片是否缓存在内存中.cacheOnDisc(true)// 设置下载的图片是否缓存在SD卡中.build();// 构建完成imageLoader.displayImage(mContent.getImgSrc(), viewHolder.headimg, options);return view;}@Overridepublic Object[] getSections() {return null;}static class ViewHolder {ImageView headimg;TextView topLetter;TextView name;public void initView(View convertView, Context context) {headimg = (ImageView) convertView.findViewById(R.id.ui_adapter_sortlist_headimg);name = (TextView) convertView.findViewById(R.id.ui_adapter_sortlist_name);topLetter = (TextView) convertView.findViewById(R.id.ui_adapter_sortlist_topletter);// 适配可以放在这里 TODO}}/*** 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).getSortLetters().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*/@SuppressLint("DefaultLocale")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;}/*** 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 "#"; } }*/
}

所有的准备完成后，就是使用啦，要是你懒得下载代码的话直接copy上边的代码就好了，有些资源文件你直接替换成自己的就能用

使用方式是首先创建list的adapter，设置list列表的adapet，接下来设置sideBar的右侧触摸监听，这里比较难说，就看下代码吧：

// 设置右侧触摸监听sideBar.setOnTouchingLetterChangedListener(new OnTouchingLetterChangedListener() {@Overridepublic void onTouchingLetterChanged(String s) {// 该字母首次出现的位置int position = adapter.getPositionForSection(s.charAt(0));// 将sortListView模拟选中该位置if (position != -1) {sortListView.setSelection(position);}}});

ok，大功告成！

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