Convert Integer value to Hour:Minute:Seconds in dart

As a developer, there are times that you 'll need to convert a integer values to time remaining, It could be during the course of using Stream or something else.

Below is a good approach to handle the situation

Not so fast,

To understand the code below you need to understand some basic time conversion.

1. one(1) hour =3600 seconds

Definitely to convert let's say 2 hours to seconds we 'll have 2*3600 = 7200 seconds

2. one(1) minute = 60 seconds

Definitely to convert 2minutes to seconds we 'll have
2*60 =120 seconds

3. one(1) seconds = 1 seconds

String intToTimeLeft(int value) {
  int h, m, s;

  h = value ~/ 3600;

  m = ((value - h * 3600)) ~/ 60;

  s = value - (h * 3600) - (m * 60);

  String result = "$h:$m:$s";

  return result;
}

Output

0:0:0

And if you decide to go with one with more muscle

String intToTimeLeft(int value) {
  int h, m, s;

  h = value ~/ 3600;

  m = ((value - h * 3600)) ~/ 60;

  s = value - (h * 3600) - (m * 60);

  String hourLeft = h.toString().length < 2 ? "0" + h.toString() : h.toString();

  String minuteLeft =
      m.toString().length < 2 ? "0" + m.toString() : m.toString();

  String secondsLeft =
      s.toString().length < 2 ? "0" + s.toString() : s.toString();

  String result = "$hourLeft:$minuteLeft:$secondsLeft";

  return result;
}

Output

00:00:00

That wraps up everything ..See you in the next one

Comments

[Pablo Discobar]

Good job! If you are interested in this topic, you can also look at my article about free vs paid Flutter templates. I'm sure you'll find something useful there, too.  - dev.to/pablonax/free-vs-paid-flutt...

[Murilo Medeiros do Valle]

You could change yout "complete with zero on left" functions with the following:

final hourLeft = h.toString().padLeft(2, '0');
final minuteLeft = m.toString().padLeft(2, '0');
final secondLeft = s.toString().padLeft(2, '0');

[Opeyemi Noah]

thanks @muthmedeiros, will definitely check it out.