hashing a string in android

gistfile1.java

/** pieced together from http://www.androidsnippets.com/create-a-md5-hash-and-dump-as-a-hex-string */
public String md5(String s) {
    try {
        // Create MD5 Hash
        MessageDigest digest = java.security.MessageDigest.getInstance("MD5");
        digest.update(s.getBytes());
        byte messageDigest[] = digest.digest();
        
        // Create Hex String
        StringBuffer hexString = new StringBuffer();
        for (int i = 0; i < messageDigest.length; i++) {
            String h = Integer.toHexString(0xFF & messageDigest[i]);
            while (h.length() < 2)
                h = "0" + h;
            hexString.append(h);
        }
        return hexString.toString();
        
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    }
    return "";
}