How to generate a unique hash code for string input in android…?

Question

I wanted to generate a unique hash code for a string in put in android. Is there any predefined library is there or we have to generate manually. Please any body if knows pl

Answer 1

You can use this code for generating has code for a given string.

int hash = 7;
for (int i = 0; i < strlen; i++) {
    hash = hash*31 + charAt(i);
}

Answer 2

I use this i tested it as key from my EhCacheManager Memory map ....

Its cleaner i suppose

   /**
     * Return Hash256 of String value
     *
     * @param text
     * @return 
     */
    public static String getHash256(String text) {
        try {
            return org.apache.commons.codec.digest.DigestUtils.sha256Hex(text);
        } catch (Exception ex) {
            Logger.getLogger(HashUtil.class.getName()).log(Level.SEVERE, null, ex);
            return "";
        }
    }

am using maven but this is the jar commons-codec-1.9.jar