[SOLVED] Flutter Time Comparaison

Flutter Time Comparaison

How to format string only Time and compare it with the current Time.

var openTime = '08:00';
var closeTime = '20:00';
var now = DateTime.now();
var formatterTime = DateFormat('kk:mm');
var time = formatterTime.format(now);

Below line Thrown invalid format

var actualTime = DateTime.parse(time); 
var closeTime = DateTime.parse(openTime);
var openTime = DateTime.parse(closeTime);

 if (closeTime.isBefore(actualTime)) {
      isOpened == false;
    }

Solution

The DateTime.parse function only accepts certain formats as an input. If you want to compare the current time to the closing time, I recommend creating the closing time as a DateTime then compare it as follows

DateTime eightAmToday = DateTime(
    DateTime.now().year, DateTime.now().month, DateTime.now().day, 8, 0, 0);
DateTime eightPmToday = DateTime(DateTime.now().year, DateTime.now().month,
    DateTime.now().day, 20, 0, 0);
DateTime now = DateTime.now();

if(eightPmToday.isBefore(now)) {
  log.i('Closed');
} else {
  log.i('Open');
}

Then if you want to display the time as a string in the format 08:00, for example, you can use the following

DateFormat formattedTime = DateFormat('kk:mm');
String displayTime = formattedTime.format(now);

If you are looking for a different way to display your DateTime as a string I recommend looking through the list of accepted strings in the documentation https://api.flutter.dev/flutter/intl/DateFormat-class.html