Question 282970 in Flutter Question posted in
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Flutter – Convert String to TimeOfDay issue

I’m getting the issue when converting string to TimeOfday. It was working before but now I am getting the issue.

try {
    final format = DateFormat.jm(); //"6:00 AM"
    TimeOfDay day = TimeOfDay.fromDateTime(format.parse("6:00"));
} catch(ex) {
    PLPrint(name: "CheckTest",value: "${ex.toString()}");
}

I have tried the format for parsing string:

1: 6:00 – FormatException: Trying to read   from 6:00 at 5

2: 6:00 AM – FormatException: Trying to read   from 6:00 AM at 5

3: 6:00:00 – FormatException: Trying to read   from 6:00:00 at 5

4: 6:00:00 AM – FormatException: Trying to read   from 6:00:00 AM at 5

5: 16:00 – FormatException: Trying to read   from 16:00 at 6

6: 16:00:00 – FormatException: Trying to read   from 16:00:00 at 6

I have tried almost all the formats but still getting the Format issue.

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2

Answers


  1. 0 
    try {
    final format = DateFormat("h:mm");
    DateTime dateTime = format.parse("13:00");
    TimeOfDay day = TimeOfDay.fromDateTime(dateTime);
    debugPrint("$day");
  } catch (ex) {
    debugPrint(ex.toString());
  }

    demo

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  2. 0

    The DateFormat jm skeleton uses a locale-dependent format and therefore can vary. In the default locale (which I think is default to U.S. English locale), that format includes an AM/PM marker, and that marker is separated with a Unicode non-breaking space (specifically U+202F):

    import 'package:intl/intl.dart';

void main() {
  var format = DateFormat.jm();
  var s1 = format.format(DateTime(2023, 1, 1, 6));
  var s2 = "6:00 AM";

  print(s1);       // Prints: 6:00 AM
  print(s1 == s2); // Prints: false

  print(s1.runes); // Prints: (54, 58, 48, 48, 8239, 65, 77)
  print(s2.runes); // Prints: (54, 58, 48, 48, 32, 65, 77)
}

    If you want jm to accept other types of whitespace, use DateFormat.parseLoose instead of DateFormat.parse:

    If inputString is accepted by parseStrict, just return the result. If not, attempt to parse it, but accepting either upper or lower case, allowing delimiters to be missing and replaced or supplemented with whitespace, and allowing arbitrary amounts of whitespace wherever whitespace is permitted. Note that this does not allow trailing characters, the way parse does.

    import 'package:intl/intl.dart';

void main() {
  var format = DateFormat.jm();
  print(format.parseLoose("6:00 AM")); // Prints: 1970-01-01 06:00:00.000
}
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