Android MD5加密工具类

public class MD5Utils {    public static String MD5(String sourceStr) {        String result = "";        try {            MessageDigest md = MessageDigest.getInstance("MD5");            md.update(sourceStr.getBytes());            byte b[] = md.digest();            int i;            StringBuffer buf = new StringBuffer("");            for (int offset = 0; offset < b.length; offset++) {                i = b[offset];                if (i < 0)                    i += 256;                if (i < 16)                    buf.append("0");                buf.append(Integer.toHexString(i));            }            result = buf.toString();        } catch (NoSuchAlgorithmException e) {            System.out.println(e);        }        return result;    }}