I tried to do something like this but failed. I was able to code a single day, but not how many hours and minutes are left.

Example picture:

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CodePudding user response：

I made something similar for a personal project, this is the snippet. It's a helper function to which you must give ms, being, EndDateInMs - StartDateInMs. There's also a TimeFrame type, but you don't need it; just take the logic for calculating the weeks/days/hours/minutes.

import '../enums/enums.dart';

Map<TimeFrame, int> msConverter(double ms) {
  int minutes;
  int hours;
  int days;
  int weeks;

  const msInWeek = 6.048e 8;
  weeks = (ms / msInWeek).floor();

  final msLeftForDays = ms - (msInWeek * weeks);
  const msInDay = 8.64e 7;
  days = (msLeftForDays / msInDay).floor();

  final msLeftForHours = msLeftForDays - (msInDay * days);
  const msInHour = 3.6e 6;
  hours = (msLeftForHours / msInHour).floor();

  final msLeftForMinutes = msLeftForHours - (msInHour * hours);
  const msInMinute = 60000;
  minutes = (msLeftForMinutes / msInMinute).round();

  return <TimeFrame, int>{
    TimeFrame.Weeks: weeks,
    TimeFrame.Days: days,
    TimeFrame.Hours: hours,
    TimeFrame.Minutes: minutes,
  };
}

CodePudding user response：

If you want to convert a Duration into days, minutes, hours, and seconds, you can just do:

var days = duration.inDays;
var hours = duration.inHours % 24;
var minutes = duration.inMinutes % 60;
var seconds = duration.inSeconds % 60;

(If you're starting from, say, a total number of seconds instead of from a Duration object, you can easily construct a Duration object first: Duration(seconds: totalSeconds).)

See https://stackoverflow.com/a/68685066/ for a more complex version that formats a Duration as a String of the form 1d2h3.45s.