国庆回了趟家,昨天真不想走,离家近的感觉太好。唉,不扯这些,说说今天的正事吧。
上篇博客中介绍了自定义AutoCompleteTextView ,但是用到了一个很蹩脚的技术,就是我们事先把每个汉字的拼音当作一个字段输入进去了,在实际的开发中肯定不会这样做,我们要通过代码自动生成汉字的拼音,就像我们的手机通讯录,比如我们要查找“张三”这个人,我们只需要输入“zs”、“cs”或者“zhangsan”、“changsan”就能搜索到该人,那么我们该怎么来实现这样的功能呢?
本文所述案例是在上篇博客的基础上实现的,如果还没阅读上篇博客,请看android开发之自定义AutoCompleteTextView。
本文要实现的整体效果如下图所示:
在上篇博客中我们自定义了AutoCompleteTextView的Adapter,本文中,我们继续对这个Adapter进行深化改造。
主要改造两个地方,第一个地方是在构造方法中初始化拼音集合:
改造后的构造方法:
public MyActAdapter(Context context, List books, int maxMatch) {
this.books = books;
this.context = context;
this.maxMatch = maxMatch;
initPinYinList();
}
这个方法主要是初始化两个List集合,一个是pinYinList 另一个是pinYinAllList ,前者是所有书的作者姓名拼音的首字母集合,后者是所有书的作者姓名拼音全拼集合。
private void initPinYinList() {
pinYinList = new ArrayList>();
pinYinAllList = new ArrayList>();
PinYin4j pinyin = new PinYin4j();
for (int i = 0; i < books.size(); i++) {
pinYinList.add(pinyin.getPinyin(books.get(i).getAuthor().toString()));
pinYinAllList.add(pinyin.getAllPinyin(books.get(i).getAuthor().toString()));
}
}
这里还涉及到两个类,如下:
PinYin4j.java
package com.example.myact;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
public class PinYin4j {
public PinYin4j(){
}
/** * 字符串集合转换字符串(逗号分隔) * *@author wangsong *@param stringSet *@return */
public String makeStringByStringSet(Set stringSet) {
StringBuilder str = new StringBuilder();
int i = 0;
for (String s : stringSet) {
if (i == stringSet.size() - 1) {
str.append(s);
} else {
str.append(s + ",");
}
i++;
}
return str.toString().toLowerCase();
}
/** * 获取汉字拼音全拼 * *@author wangsong *@param src *@return Set */
public Set getAllPinyin(String src) {
char[] srcChar;
srcChar = src.toCharArray();
String[][] temp = new String[src.length()][];
for (int i = 0; i < srcChar.length; i++) {
char c = srcChar[i];
if (String.valueOf(c).matches("[\\u4E00-\\u9FA5]+")) {
String[] t = PinyinHelper.getUnformattedHanyuPinyinStringArray(c);
temp[i] = new String[t.length];
for(int j=0;j
temp[i][j]=t[j].replaceAll("\\d", "");//获取全拼
}
} else if (((int) c >= 65 && (int) c <= 90)
|| ((int) c >= 97 && (int) c <= 122)||c>=48&&c<=57||c==42) {
temp[i] = new String[] { String.valueOf(srcChar[i]) };
} else {
temp[i] = new String[] {"null!"};
}
}
String[] pingyinArray = paiLie(temp);
return array2Set(pingyinArray);
}
/** * 获取汉字拼音首字母集合 * *@author wangsong *@param src *@return Set */
public Set getPinyin(String src) {
char[] srcChar;
srcChar = src.toCharArray();
String[][] temp = new String[src.length()][];
for (int i = 0; i < srcChar.length; i++) {
char c = srcChar[i];
if (String.valueOf(c).matches("[\\u4E00-\\u9FA5]+")) {
String[] t = PinyinHelper.getUnformattedHanyuPinyinStringArray(c);
temp[i] = new String[t.length];
for(int j=0;j
temp[i][j]=t[j].substring(0,1);
}
} else if (((int) c >= 65 && (int) c <= 90)
|| ((int) c >= 97 && (int) c <= 122)||c>=48&&c<=57||c==42) {
temp[i] = new String[] { String.valueOf(srcChar[i]) };
} else {
temp[i] = new String[] {"null!"};
}
}
String[] pingyinArray = paiLie(temp);
return array2Set(pingyinArray);
}
/* * 求2维数组所有排列组合情况 * 比如:{{1,2},{3},{4},{5,6}}共有2中排列,为:1345,1346,2345,2346 */
private String[] paiLie(String[][] str){
int max=1;
for(int i=0;i
max*=str[i].length;
}
String[] result=new String[max];
for(int i = 0; i < max; i++){
String s = "";
int temp = 1; //注意这个temp的用法。
for(int j = 0; j < str.length; j++){
temp *= str[j].length;
s += str[j][i / (max / temp) % str[j].length];
}
result[i]=s;
}
return result;
}
/** * 去掉重复项 *@param tArray *@return */
public static Set array2Set(T[] tArray) {
Set tSet = new HashSet(Arrays.asList(tArray));
// TODO 没有一步到位的方法,根据具体的作用,选择合适的Set的子类来转换。
return tSet;
}
}
PinyinHelper.java
package com.example.myact;
import java.io.BufferedInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Properties;
public class PinyinHelper {
private static PinyinHelper instance;
private Properties properties = null;
public static String[] getUnformattedHanyuPinyinStringArray(char ch) {
return getInstance().getHanyuPinyinStringArray(ch);
}
private PinyinHelper() {
initResource();
}
public static PinyinHelper getInstance() {
if (instance == null) {
instance = new PinyinHelper();
}
return instance;
}
private void initResource() {
try {
final String resourceName = "/assets/unicode_to_hanyu_pinyin.txt";
// final String resourceName = "/assets/unicode_py.ini";
properties = new Properties();
properties.load(getResourceInputStream(resourceName));
} catch (FileNotFoundException ex) {
ex.printStackTrace();
} catch (IOException ex) {
ex.printStackTrace();
}
}
private BufferedInputStream getResourceInputStream(String resourceName) {
return new BufferedInputStream(
PinyinHelper.class.getResourceAsStream(resourceName));
}
private String[] getHanyuPinyinStringArray(char ch) {
String pinyinRecord = getHanyuPinyinRecordFromChar(ch);
if (null != pinyinRecord) {
int indexOfLeftBracket = pinyinRecord.indexOf(Field.LEFT_BRACKET);
int indexOfRightBracket = pinyinRecord
.lastIndexOf(Field.RIGHT_BRACKET);
String stripedString = pinyinRecord.substring(indexOfLeftBracket
+ Field.LEFT_BRACKET.length(), indexOfRightBracket);
return stripedString.split(Field.COMMA);
} else
return null;
}
private String getHanyuPinyinRecordFromChar(char ch) {
int codePointOfChar = ch;
String codepointHexStr = Integer.toHexString(codePointOfChar)
.toUpperCase();
String foundRecord = properties.getProperty(codepointHexStr);
return foundRecord;
}
class Field {
static final String LEFT_BRACKET = "(";
static final String RIGHT_BRACKET = ")";
static final String COMMA = ",";
}
public static String[] toHanyuPinyinStringArray(char ch) {
return getUnformattedHanyuPinyinStringArray(ch);
}
}
这里是初始化拼音集合。
第二个改造的地方就是在过滤器中增加过滤的条件。
这是最新的过滤器,和上文相比,这里只是增加了一个else分支,在else分支中判断搜索条件是否符合要求。
private class ArrayFilter extends Filter {
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults results = new FilterResults();
if (mFilterBooks == null) {
mFilterBooks = new ArrayList(books);
}
// 如果没有过滤条件则不过滤
if (constraint == null || constraint.length() == 0) {
results.values = mFilterBooks;
results.count = mFilterBooks.size();
} else {
List retList = new ArrayList();
// 过滤条件
String str = constraint.toString().toLowerCase();
Book book;
// 循环变量数据源,如果有属性满足过滤条件,则添加到result中
for (int i = 0; i < mFilterBooks.size(); i++) {
book = mFilterBooks.get(i);
if (book.getAuthor().contains(str)
|| book.getName().contains(str)
|| (book.getId() + "").contains(str)
|| (book.getPrice() + "").contains(str)
|| book.getPinyin().contains(str)) {
retList.add(book);
} else {
//查看作者姓名拼音首字母是否符合过滤条件
Set pinyinSet = pinYinList.get(i);
Iterator pinyin = pinyinSet.iterator();
while (pinyin.hasNext()) {
if (pinyin.next().toString().contains(str)) {
retList.add(book);
break;
}
}
//查看作者姓名拼音全拼是否符合过滤条件
Set pinyinAllSet = pinYinAllList.get(i);
Iterator pinyinAll = pinyinAllSet.iterator();
while (pinyinAll.hasNext()) {
if (pinyinAll.next().toString().contains(str)) {
retList.add(book);
break;
}
}
}
// if (maxMatch > 0) {
// if (retList.size() > maxMatch - 1) {
// break;
// }
// }
}
results.values = retList;
results.count = retList.size();
}
return results;
}
// 在这里返回过滤结果
@Override
protected void publishResults(CharSequence constraint,
FilterResults results) {
// notifyDataSetInvalidated(),会重绘控件(还原到初始状态)
// notifyDataSetChanged(),重绘当前可见区域
books = (List) results.values;
if (results.count > 0) {
notifyDataSetChanged();
} else {
notifyDataSetInvalidated();
}
}
}
其实还是很简单的,有问题欢迎留言讨论。