How do you count the time spent on the mission?

[charlenef]

I'm writing a little Android app on Java. I have users in one activist tested and, at the end of the test, I have the following activism that passes the final infa by passing the test. So one of the fields is spent time on a mission... I'm trying to count time as a chronometer, but he's in milliseconds thinking and then formatting through different checks at 00:00 (02 : 34) and it's very circumstantial... I'm sure there's a better solution. ♪ ♪

How can you do that?

[Analeea]

1. At the beginning of the mission, keep the current time long variable:

   long startTime = System.currentTimeMillis();
   

2. After the end, get the difference:

   long totalTime = System.currentTimeMillis() - startTime;
   

3. Take class. Calendar and assigns it the following value:

   Calendar cal = Calendar.getInstance();
   cal.setTimeInMillis( totalTime );
   

4. We get minutes/seconds.

   int minutes = cal.get(Calendar.MINUTE);
   int seconds = cal.get(Calendar.SECOND);
   

or in a class format SimpleDateFormat

SimpleDateFormat format = new SimpleDateFormat("mm:ss");
System.out.println(format.format(cal.getTime()));