Android generate different random number (java)

            listnumber = listArray.length();


            int min = 0;
            int max = listnumber;
            Random rnd = new Random();
            int i = rnd.nextInt(max - min) + min;

            JSONObject veriyial=listArray.getJSONObject(i);

Hi. I want to get a random number but must be different from each other

Sory my english is bad. Thx :)