How to format Time in Flutter - flutter

Question

I have the following function, where within a ListBody I map List values, I have a time parameter that returns a time. This contains unnecessary digits and I want to format it.
In other normal List situations I use the function
var timeFormat = DateFormat("HH:mm");
String timetest = timeFormat.format(my_data);
How can I implement my above function to format the time in the below RichText, where I enter data into TextSpan from the map, and cannot build it as a var outside and then call it in?
var mappedValues = ListBody(
children: [...mappedList.map((m) => RichText (
text: TextSpan(
children: <TextSpan> [
TextSpan(text: m.time!.toLocal().toString(), style: TextStyle(
fontSize: 18 ,
fontWeight: FontWeight.w400,
color: Color(0xff2F2F2F),
fontFamily: 'DMSans'
)
),
]
)))]);
Thank you
Update
Example of initial output
2022-03-05 23:24:00.000
My function will turn it to
23:24

Answer 1

Then you should be able to create a method within this widget that takes the Datetime (m.time) as input and returns the formatted time, as:
String getFormattedTime(DateTime time) {
var timeFormat = DateFormat("HH:mm");
String timePortion = timeFormat.format(time);
return timePortion;
}
Then inside your widget just call it:
TextSpan(text: getFormattedTime(m.time!))
You could also move this method into a common utility class so you can reuse it throughout your app. Let me know if that’s what you looking for and works for your purposes.
Check out this Gist (make sure to run it through DartPad) that I created that illustrates my point. Another suggestion would be to use ListView in favor or ListBody as it is more robust.
You should get output that looks like this:
Let me know if that's clear.