Android Utililty Methods SHA1 Hash Create

try {
    MessageDigest md = MessageDigest.getInstance("SHA1");
    return md.digest(data);
} catch (NoSuchAlgorithmException e) {
    e.printStackTrace();
return null;

if (bytesOfMessage.length == 0) {
    return null;
} else {
    try {
        MessageDigest sha1 = MessageDigest.getInstance("SHA1");
        byte[] hash = sha1.digest(bytesOfMessage);
        StringBuilder hexDigest = new StringBuilder();
        for (int i = 0; i < hash.length; i++) {
...

MessageDigest messageDigest = MessageDigest.getInstance("SHA-1");
byte[] der = certificate.getEncoded();
messageDigest.update(der);
byte[] digest = messageDigest.digest();
return hexify(digest);

try {
    SecretKeySpec signingKey = new SecretKeySpec(key, "HmacSHA1");
    Mac mac = Mac.getInstance("HmacSHA1");
    mac.init(signingKey);
    return mac.doFinal(value);
} catch (Exception e) {
    throw new RuntimeException(e);

MessageDigest mdSha1 = null;
String SHAHash;
mdSha1 = MessageDigest.getInstance("SHA-1");
mdSha1.update(password.getBytes("ASCII"));
byte[] data = mdSha1.digest();
SHAHash = convertToHex(data);
return SHAHash;

try {
    MessageDigest md = MessageDigest.getInstance("SHA-1");
    String clearPassword = passwd;
    md.update(clearPassword.getBytes());
    byte[] digestedPassword = md.digest();
    return new String(digestedPassword);
} catch (java.security.NoSuchAlgorithmException e) {
    System.out.println("Rats, SHA-1 doesn't exist");
...

try {
    if (digest == null)
        digest = MessageDigest.getInstance("SHA-1");
    return digest.digest(inputBytes);
} catch (Exception e) {
    throw new Exception("[SecUtil] Error in generating digest");