android应用框架搭建------工具类（StringUtils）
在应用开发中，字符串的操作肯定是少不了的。这里是我的一些经验的积累，工具类没有过多的解释，大家看注释就行了。
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.regex.Pattern;
import android.app.Activity;
import android.content.Context;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.os.Bundle;
import android.telephony.TelephonyManager;
/**
* 字符串操作工具包
*/
public class StringUtils {
private final static Pattern emailer = Pattern
.compile("\\w+([-+.]\\w+)*@\\w+([-.]\\w+)*\\.\\w+([-.]\\w+)*");
private final static Pattern phone = Pattern
.compile("^((13[0-9])|170|(15[^4,\\D])|(18[0,5-9]))\\d{8}$");
private final static ThreadLocal<SimpleDateFormat> dateFormater = new ThreadLocal<SimpleDateFormat>() {
@Override
protected SimpleDateFormat initialValue() {
return new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
}
};
private final static ThreadLocal<SimpleDateFormat> dateFormater2 = new ThreadLocal<SimpleDateFormat>() {
@Override
protected SimpleDateFormat initialValue() {
return new SimpleDateFormat("yyyy-MM-dd");
}
};
/**
* 返回当前系统时间
*/
public static String getDataTime(String format) {
SimpleDateFormat df = new SimpleDateFormat(format);
return df.format(new Date());
}
/**
* 返回当前系统时间
*/
public static String getDataTime() {
return getDataTime("HH:mm");
}
/**
* 毫秒值转换为mm:ss
*
* @author kymjs
* @param ms
*/
public static String timeFormat(int ms) {
StringBuilder time = new StringBuilder();
time.delete(0, time.length());
ms /= 1000;
int s = ms % 60;
int min = ms / 60;
if (min < 10) {
time.append(0);
}
time.append(min).append(":");
if (s < 10) {
time.append(0);
}
time.append(s);
return time.toString();
}
/**
* 将字符串转位日期类型
*
* @return
*/
public static Date toDate(String sdate) {
try {
return dateFormater.get().parse(sdate);
} catch (ParseException e) {
return null;
}
}
/**
* 判断给定字符串时间是否为今日
*
* @param sdate
* @return boolean
*/
public static boolean isToday(String sdate) {
boolean b = false;
Date time = toDate(sdate);
Date today = new Date();
if (time != null) {
String nowDate = dateFormater2.get().format(today);
String timeDate = dateFormater2.get().format(time);
if (nowDate.equals(timeDate)) {
b = true;
}
}
return b;
}
/**
* 判断给定字符串是否空白串 空白串是指由空格、制表符、回车符、换行符组成的字符串 若输入字符串为null或空字符串，返回true
*/
public static boolean isEmpty(String input) {
if (input == null || "".equals(input))
return true;
for (int i = 0; i < input.length(); i++) {
char c = input.charAt(i);
if (c != ' ' && c != '\t' && c != '\r' && c != '\n') {
return false;
}
}
return true;
}
/**
* 判断是不是一个合法的电子邮件地址
*/
public static boolean isEmail(String email) {
if (email == null || email.trim().length() == 0)
return false;
return emailer.matcher(email).matches();
}
/**
* 判断是不是一个合法的手机号码
*/
public static boolean isPhone(String phoneNum) {
if (phoneNum == null || phoneNum.trim().length() == 0)
return false;
return phone.matcher(phoneNum).matches();
}
/**
* 字符串转整数
*
* @param str
* @param defValue
* @return
*/
public static int toInt(String str, int defValue) {
try {
return Integer.parseInt(str);
} catch (Exception e) {
}
return defValue;
}
/**
* 对象转整
*
* @param obj
* @return 转换异常返回 0
*/
public static int toInt(Object obj) {
if (obj == null)
return 0;
return toInt(obj.toString(), 0);
}
/**
* String转long
*
* @param obj
* @return 转换异常返回 0
*/
public static long toLong(String obj) {
try {
return Long.parseLong(obj);
} catch (Exception e) {
}
return 0;
}
/**
* String转double
*
* @param obj
* @return 转换异常返回 0
*/
public static double toDouble(String obj) {
try {
return Double.parseDouble(obj);
} catch (Exception e) {
}
return 0D;
}
/**
* 字符串转布尔
*
* @param b
* @return 转换异常返回 false
*/
public static boolean toBool(String b) {
try {
return Boolean.parseBoolean(b);
} catch (Exception e) {
}
return false;
}
/**
* 判断一个字符串是不是数字
*/
public static boolean isNumber(String str) {
try {
Integer.parseInt(str);
} catch (Exception e) {
return false;
}
return true;
}
/**
* 获取AppKey
*/
public static String getMetaValue(Context context, String metaKey) {
Bundle metaData = null;
String apiKey = null;
if (context == null || metaKey == null) {
return null;
}
try {
ApplicationInfo ai = context.getPackageManager()
.getApplicationInfo(context.getPackageName(),
PackageManager.GET_META_DATA);
if (null != ai) {
metaData = ai.metaData;
}
if (null != metaData) {
apiKey = metaData.getString(metaKey);
}
} catch (NameNotFoundException e) {
}
return apiKey;
}
/**
* 获取手机IMEI码
*/
public static String getPhoneIMEI(Activity aty) {
TelephonyManager tm = (TelephonyManager) aty
.getSystemService(Activity.TELEPHONY_SERVICE);
return tm.getDeviceId();
}
/**
* MD5加密
*/
public static String md5(String string) {
byte[] hash;
try {
hash = MessageDigest.getInstance("MD5").digest(
string.getBytes("UTF-8"));
} catch (NoSuchAlgorithmException e) {
throw new RuntimeException("Huh, MD5 should be supported?", e);
} catch (UnsupportedEncodingException e) {
throw new RuntimeException("Huh, UTF-8 should be supported?", e);
}
StringBuilder hex = new StringBuilder(hash.length * 2);
for (byte b : hash) {
if ((b & 0xFF) < 0x10)
hex.append("0");
hex.append(Integer.toHexString(b & 0xFF));
}
return hex.toString();
}
/**
* KJ加密
*/
public static String KJencrypt(String str) {
char[] cstr = str.toCharArray();
StringBuilder hex = new StringBuilder();
for (char c : cstr) {
hex.append((char) (c + 5));
}
return hex.toString();
}
/**
* KJ解密
*/
public static String KJdecipher(String str) {
char[] cstr = str.toCharArray();
StringBuilder hex = new StringBuilder();
for (char c : cstr) {
hex.append((char) (c - 5));
}
return hex.toString();
}
}
这些是本人在工作中对于字符串操作的一些积累，有什么不足的地方还希望大家补充