// Importi
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

// Postavi metodo v tvoj class
private static String MD5Crypt(String message) {
	String digest = null;
	try {
		MessageDigest md = MessageDigest.getInstance("MD5");
		byte[] hash = md.digest(message.getBytes("UTF-8"));

		StringBuilder sb = new StringBuilder(2*hash.length);
		for(byte b : hash)
			sb.append(String.format("%02x", b&0xff));
		digest = sb.toString();
	} catch(UnsupportedEncodingException e) {
		e.printStackTrace();
	} catch(NoSuchAlgorithmException e) {
		e.printStackTrace();
	}
	return digest;
}