String sourceDate = "2013-10-30 08:10:20";
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
        Date create = format.parse(sourceDate);
 
        long time = System.currentTimeMillis() - create.getTime();
        long day = (time / (1000 * 60 * 60 * 24));
        long hour = (time / (1000 * 60 * 60));
        long minute = (((time) / (1000 * 60)) % 60);
        String string = "";
 
        if (day == 0) {
 
            if (hour > 0) {
                if (hour == 1) {
                    string = "Час ";
                } else if (hour == 21) {
                    string = hour + " час ";
                } else if ((hour >= 2 && hour <= 4) || (hour >= 22 && hour <= 24)) {
                    string = hour + " часa ";
                } else if (hour >= 5 && hour <= 20) {
                    string = hour + " часов ";
                }
                string = string + "";
            } else {
                if (minute > 0) {
                    string = minute + " мин";
                } else {
                    string = "Только что";
                }
            }
        } else {
            string = new SimpleDateFormat("d MMM yy в HH:mm").format(create);
        }