android md5加密

public class Md5Utils {
    public static String getMD52(String info) {
        try {
            MessageDigest md5 = MessageDigest.getInstance("MD5");
            md5.update(info.getBytes("UTF-8"));
            byte[] encryption = md5.digest();

            StringBuffer strBuf = new StringBuffer();
            for (int i = 0; i < encryption.length; i++) {
                if (Integer.toHexString(0xff & encryption[i]).length() == 1) {
                    strBuf.append("0").append(
                            Integer.toHexString(0xff & encryption[i]));
                } else {
                    strBuf.append(Integer.toHexString(0xff & encryption[i]));
                }
            }

            return strBuf.toString();
        } catch (NoSuchAlgorithmException e) {
            return "";
        } catch (UnsupportedEncodingException e) {
            return "";
        }
    }

    public static String generateMD5String(String string) {
        String result = "";
        try {
            MessageDigest m = MessageDigest.getInstance("MD5");
            m.update(string.getBytes("UTF8"));
            byte s[] = m.digest();

            for (int i = 0; i < s.length; i++) {
                result += Integer.toHexString((0x000000ff & s[i]) | 0xffffff00)
                        .substring(6);
            }
        } catch (Exception e) {
            result = null;
        }
        return result;
    }

}