Question

I have a code returning me a string (HH:mm).

SimpleDateFormat curFormater = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); 
        java.util.Date dateObj;
        try {
            dateObj = curFormater.parse(start);

            SimpleDateFormat postFormater = new SimpleDateFormat("HH:mm"); 
            String newDateStr = postFormater.format(dateObj); 
            startView.setText(newDateStr);
            Emission_start = newDateStr;
        } catch (ParseException e) {
            // TODO Auto-generated catch block
            Log.d(" * Error", e.toString());
        }

It works great… But right now I would like to:

1. add x (is dynamically provided) minutes (x = from 5 to 1000 minutes) and transform to time (example time:3:45, add 25 minutes, transform to time 4:10)
2. Get current time and calculate difference between current time and time from step 1 (4:10)
3. Get time difference (from step 2) in minutes!

Thanks for your help!

Answer 1

I haven’t tested, but something like this should work:

1. long newDate = dateObj.getTime() +
(x * 60 * 1000)

2. long diff =
System.currentTimeMillis() - newDate

3. double diffInMins = diff / (60.0 * 1000.0)