安卓获取MD5加密串

/** * 获得MD5加密字符串 *  * @param str *            字符串 * @return */public static String getMD5Str(String str) {   MessageDigest messageDigest = null;   try {      messageDigest = MessageDigest.getInstance("MD5");      messageDigest.reset();      messageDigest.update(str.getBytes("UTF-8"));   } catch (NoSuchAlgorithmException e) {   } catch (UnsupportedEncodingException e) {      e.printStackTrace();   }   byte[] byteArray = messageDigest.digest();   StringBuffer md5StrBuff = new StringBuffer();   for (int i = 0; i < byteArray.length; i++) {      if (Integer.toHexString(0xFF & byteArray[i]).length() == 1)         md5StrBuff.append("0").append(Integer.toHexString(0xFF & byteArray[i]));      else         md5StrBuff.append(Integer.toHexString(0xFF & byteArray[i]));   }   return md5StrBuff.toString();}