原文：http://blog.csdn.net/xiaanming/article/details/12684155
思路：
1.自定義的View，當點擊這個view時會獲取出點擊的位置，根據比例關係算出點擊的是第幾個字母，
if (mTextDialog != null) {
mTextDialog.setText(b[c]);
mTextDialog.setVisibility(View.VISIBLE);
}這個個setTextView(TextView mTextDialog)方法會傳入dialog，之後就是讓他顯示或隱藏，
if (listener != null) {
listener.onTouchingLetterChanged(b[c]);
}然後這個接口會回調到activity把計算出來的是那個字母發過去。這個自定義的大概邏輯就是這些。
2，在activity中設置的自定義的view監聽事件中，實現的這個方法會發過來當前點擊的是那個字母，然後在根據這個字母，獲取這個字母的第一次出現在哪個位置
position = adapter.getPositionForSection(s.charAt(0));listView.setSelection(position);其他的代碼中的註釋非常詳細，如還有不明白可評論或消息，大家一起進步。
1.先自定義view索引
public class SideBar extends View {
// 觸摸事件
private OnTouchingLetterChangedListener onTouchingLetterChangedListener;
// 26個字母
public static String[] b = { "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 choose = -1;// 選中
private Paint paint = new Paint();
private TextView mTextDialog;
public void setTextView(TextView mTextDialog) {
this.mTextDialog = 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);
}
/**
* 畫
*/
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
// 獲取焦點改變背景顏色.
int height = getHeight();// 獲取對應高度
int width = getWidth(); // 獲取對應寬度
int singleHeight = height / b.length;// 獲取每一個字母的高度
for (int i = 0; i < b.length; i++) {
paint.setColor(Color.rgb(33, 65, 98));
paint.setAlpha(100);
// paint.setColor(Color.WHITE);
paint.setTypeface(Typeface.DEFAULT_BOLD);
paint.setAntiAlias(true);
paint.setTextSize(20);
// 選中的狀態
if (i == choose) {
paint.setColor(Color.parseColor("#3399ff"));
paint.setFakeBoldText(true);
}
// x座標等於中間-字符串寬度的一半.
float xPos = width / 2 - paint.measureText(b[i]) / 2;// 居中
float yPos = singleHeight * i + singleHeight;
canvas.drawText(b[i], xPos, yPos, paint);
paint.reset();// 重置畫筆
}
}
@Override
public boolean dispatchTouchEvent(MotionEvent event) {
final int action = event.getAction();
final float y = event.getY();// 點擊y座標
final int oldChoose = choose;// 記錄之前點擊是第幾個
final OnTouchingLetterChangedListener listener = onTouchingLetterChangedListener;
final int c = (int) (y / getHeight() * b.length);// 點擊y座標所佔總高度的比例*b數組的長度就等於點擊b中的第幾個.
switch (action) {
// 擡起手指時執行。讓中間的dialog消失
case MotionEvent.ACTION_UP:
setBackgroundDrawable(new ColorDrawable(0x00000000));
choose = -1;//
invalidate();
if (mTextDialog != null) {
mTextDialog.setVisibility(View.INVISIBLE);
}
break;
// 除了放開時執行。在本案例中按着滑動時執行
default:
// 設置右側字母列表[A,B,C,D,E....]的背景顏色
setBackgroundResource(R.drawable.sortlistview_sidebar_background);
// 滑動時會一直變化，選中的值也變化，當滑動的幅度小時會等於之前的值所以就不用執行以下方法，
// 當值變化不等於之前的值時就得執行，dialog變化，通知list變化
if (oldChoose != c) {
if (c >= 0 && c < b.length) {
if (listener != null) {
listener.onTouchingLetterChanged(b[c]);
}
if (mTextDialog != null) {
mTextDialog.setText(b[c]);
mTextDialog.setVisibility(View.VISIBLE);
}
choose = c;
invalidate();// 自動清屏以及刷新界面
}
}
break;
}
return true;
}
/**
* 向外公開的方法
*
* @param onTouchingLetterChangedListener
*/
public void setOnTouchingLetterChangedListener(
OnTouchingLetterChangedListener onTouchingLetterChangedListener) {
this.onTouchingLetterChangedListener = onTouchingLetterChangedListener;
}
/**
* 接口
*
* @author coder
*
*/
public interface OnTouchingLetterChangedListener {
public void onTouchingLetterChanged(String s);
}
}
2.因爲要懸浮在上面所以要用FrameLayout
<FrameLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<cn.utils.MySwipeRefreshLayout
android:id="@+id/mySwipeRefreshLayout_shang_brs"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ListView
android:id="@+id/listView_renshu"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentLeft="true"
android:divider="@null"
android:layout_below="@+id/relativeLayout_top">
</ListView>
</cn.utils.MySwipeRefreshLayout>
<TextView
android:id="@+id/dialog"
android:layout_width="80.0dip"
android:layout_height="80.0dip"
android:layout_gravity="center"
android:background="#90656565"
android:gravity="center"
android:textColor="#ffffff"
android:textSize="30.0dip"
android:visibility="invisible" />
<cn.suoyin.SideBar
android:id="@+id/sidrbar"
android:layout_width="30.0dip"
android:layout_height="fill_parent"
android:layout_marginBottom="10dp"
android:layout_gravity="right|center" />
</FrameLayout>sideBar = (SideBar) findViewById(R.id.sidrbar);
dialog = (TextView) findViewById(R.id.dialog);
sideBar.setTextView(dialog);
// 設置右側觸摸監聽
sideBar.setOnTouchingLetterChangedListener(new OnTouchingLetterChangedListener() {
@Override
public void onTouchingLetterChanged(String s) {
// 該字母首次出現的位置
int position;
if (s.equals("#")) {
position = adapter.getPositionForSection("|".charAt(0));
} else {
position = adapter.getPositionForSection(s.charAt(0));
}
if (position != -1) {
listView.setSelection(position);
}
}
});4.自定義的adapter
public class MinciAdapter extends BaseAdapter implements SectionIndexer {
private Context context;
private List<Minci> list;
public MinciAdapter(Context context, List<Minci> 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<Minci> 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 mHolder = null;
if (convertView == null) {
mHolder = new ViewHolder();
convertView = LayoutInflater.from(context).inflate(
R.layout.item_minci_layout, parent, false);
mHolder.uname = (TextView) convertView
.findViewById(R.id.textView_minci_uname);
mHolder.departement = (TextView) convertView
.findViewById(R.id.textView_minci_departement);
mHolder.job = (TextView) convertView
.findViewById(R.id.textView_minci_job);
mHolder.img = (RoundImageView) convertView
.findViewById(R.id.imageView_minci_title);
mHolder.minci = (TextView) convertView
.findViewById(R.id.textView_minci_mc);
mHolder.textView_item_top = (TextView) convertView
.findViewById(R.id.textView_item_top);
mHolder.time = (TextView) convertView
.findViewById(R.id.textView_time);
mHolder.imageView_item_minci_on_line_type = (ImageView) convertView
.findViewById(R.id.imageView_item_minci_on_line_type);
convertView.setTag(mHolder);
} else {
mHolder = (ViewHolder) convertView.getTag();
}
Minci minci = list.get(position);
mHolder.uname.setText(minci.getName());
mHolder.departement.setText(minci.getDepartment());
mHolder.job.setText(minci.getJos());
mHolder.time.setText(minci.getTime());
if (!minci.getImg().equals("")) {
BitmapHelper.getBitmapUtils().display(mHolder.img, minci.getImg());
}
// 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 ，則認爲是第一次出現
if (position == getPositionForSection(section)) {
mHolder.textView_item_top.setVisibility(View.VISIBLE);
if ("|".equals(minci.getFirst_char_by_uname().toUpperCase())) {
mHolder.textView_item_top.setText("#");
} else {
mHolder.textView_item_top.setText(minci
.getFirst_char_by_uname().toUpperCase());
}
} else {
mHolder.textView_item_top.setVisibility(View.GONE);
}
mHolder.img.setType(RoundImageView.TYPE_CIRCLE);
mHolder.minci.setVisibility(View.GONE);
mHolder.time.setVisibility(View.GONE);
mHolder.imageView_item_minci_on_line_type.setVisibility(View.VISIBLE);
// TODO 不完善待改。。。。後面跟的終端類型。。。。。。。。。。。。。。。。。。。。。
String devname = minci.getDevname();
if ("pc".equals(devname)) {
mHolder.imageView_item_minci_on_line_type.setImageDrawable(context
.getResources().getDrawable(R.drawable.pccj));
} else if (devname.length() >= 4
&& devname.subSequence(0, 4).equals("ipad")) {
mHolder.imageView_item_minci_on_line_type.setImageDrawable(context
.getResources().getDrawable(R.drawable.ipadcj));
} else if (devname.length() >= 4
&& devname.subSequence(0, 6).equals("iPhone")) {
mHolder.imageView_item_minci_on_line_type.setImageDrawable(context
.getResources().getDrawable(R.drawable.iphonecj));
} else if (devname.length() >= 4
&& devname.subSequence(0, 7).equals("android")) {
mHolder.imageView_item_minci_on_line_type.setImageDrawable(context
.getResources().getDrawable(R.drawable.androicjd));
}
return convertView;
}
public class ViewHolder {
private TextView uname;
private TextView departement;
private TextView job;
private RoundImageView img;
private TextView time;
private TextView minci;
private TextView textView_item_top;
private ImageView imageView_item_minci_on_line_type;
}
/**
* 根據ListView的當前位置獲取分類的首字母的Char ascii值
*/
@Override
public int getSectionForPosition(int position) {
return list.get(position).getFirst_char_by_uname().toUpperCase()
.charAt(0);
}
/**
* 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 "#";
}
}
@Override
public Object[] getSections() {
return null;
}
/**
* 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).getFirst_char_by_uname();
char firstChar = sortStr.toUpperCase().charAt(0);
if (firstChar == section) {
return i;
}
}
return -1;
}
}下面來說一下排序
/**
* 漢字轉換成拼音的類
*/
private CharacterParser characterParser;
/**
* 根據拼音來排列比較器
*/
private PinyinComparator pinyinComparator;// 實例化漢字轉拼音類
characterParser = CharacterParser.getInstance();
pinyinComparator = new PinyinComparator();
//漢字轉換成拼音
String pinyin = characterParser.getSelling(json需要排序的漢字);
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]")){
//存到實體類的一個變量
minci.getFirst_char_by_uname.(sortString.toUpperCase());//變大寫
}else{
minci.getFirst_char_by_uname.("#");
}
list.add(minci);
}漢字轉拼音
/**
* Java漢字轉換爲拼音
*
*/
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());
}
}