Flutter hours and minute count issue - flutter

Question

I need to sum the hours and minutes so I am doing this like ill convert hours in second and minutes in second then sum it
var totalServiceSeconds = minsSeconds + hoursSeconds;
var c = Duration(seconds: totalServiceSeconds);
print('c ${c.toString()}');
it's showing c 25:05:00.000000 which is correct
Know I need to show this as hours and minutes in the text widget. So I am converting to DateTime like this
var format = DateFormat("HH:mm");
DateTime totalServiceTime = format.parse(c.toString());
But it's printing it like this totalServiceTime 1970-01-02 01:05:00.000
This issue is only when the hours are 24 or more. If my hours are 24 then it's showing 0 and if greater than 24 then it's showing 1 2 so on. I know it because it's considering 24 as 0 but what can I do about this?
I want to show 24 if it's 24 hours or if greater than 24 like 26 need to show 26.

Answer 1

You do not want to convert it into a DateFormat because time steps of 24 hours is how they count a full day. Instead you should format var c as shown below
var totalServiceSeconds = minsSeconds + hoursSeconds;
var c = Duration(seconds: totalServiceSeconds);
print('c ${c.toString()}');
String FormatDuration = "${c.inHours}:${c.inMinutes.remainder(60)}:${(c.inSeconds.remainder(60))}";
print(FormatDuration);
String FormatDuration2 = "${c.inHours} hours ${c.inMinutes.remainder(60)} minutes ${(c.inSeconds.remainder(60))} seconds";
print(FormatDuration2);
The output will then be
c 25:05:00.000000 <-------previous
25:5:0 <-------new option 1
25 hours 5 minutes 0 seconds <-------new option 2