Compare two time in flutter-CodePudding

I would like to compare last_uploaded_time with current time. How to check whether the two time is more or less than one minute?

bool compareTime(String starts) {
    print(starts);
    var start = starts.split(":");

    DateTime currentDateTime = DateTime.now();

    String currentTime =
        DateFormat(DateUtil.TIME_FORMAT).format(currentDateTime);

    print(currentTime);

    var end = currentTime.split(":");

    DateTime initDateTime = DateTime(
        currentDateTime.year, currentDateTime.month, currentDateTime.day);

    var startDate = (initDateTime.add(Duration(hours: int.parse(start[0]))))
        .add(Duration(minutes: int.parse(start[1])));
    var endDate = (initDateTime.add(Duration(hours: int.parse(end[0]))))
        .add(Duration(minutes: int.parse(end[1])));

    if (currentDateTime.isBefore(endDate) &&
        currentDateTime.isAfter(startDate)) {
      print("CURRENT datetime is between START and END datetime");
      return true;
    } else {
      print("NOT BETWEEN");
      return false;
    }
  }

Output

I/flutter (12908): 01:16
I/flutter (12908): 01:40
I/flutter (12908): NOT BETWEEN

CodePudding user response：

difference

not exactly working with minutes and seconds so you can use some custom algorithm like

import 'package:intl/intl.dart';

class IntelModel { static String timeSinceDate(DateTime date) { final now = DateTime.now(); final difference = now.toLocal().difference(date.toLocal());

if ((now.day - date.day) >= 8) {
  return 'A few weeks ago';
} else if ((now.day - date.day) >= 1) {
  return '${(now.day - date.day)} days ago';
} else if (now.day == date.day) {
  if (now.hour > date.hour) {
    if ((now.hour - date.hour) >= 2) {
      if (now.minute == date.minute) {
        return '${(now.hour - date.hour)} hours ago';
      } else {
        var mins = now.minute - date.minute;
        if (mins > 1) {
          return '${(now.hour - date.hour)} h ${(now.minute - date.minute)} minutes ago';
        } else {
          return '${(now.hour - date.hour) - 1} h ${60   mins} minutes ago';
        }
      }
      
    } else if ((now.hour - date.hour) == 1) {
      int timeMin = now.minute   (60 - date.minute);

      if (timeMin == 60) {
        return '1 hours ago';
      } else if (timeMin >= 60) {
        return '1 h ${timeMin - 60}  mins ago';
      } else {
        return '$timeMin minutes ago';
      }
    }
  } else if (now.hour == date.hour) {
    if (now.minute > date.minute) {
      return '${(now.minute - date.minute)} minutes ago';
    } else if (date.minute == now.minute) {
      return '${(now.second - date.second)} seconds ago';
    }
  }
} else {
  return 'Error in time';
}   } }

CodePudding user response：

void main() {
  String getDifference(DateTime date){
      Duration duration =  DateTime.now().difference(date); 
      String differenceInMinutes = (duration.inMinutes).toString();
      return differenceInMinutes;
  }
  String str =  getDifference(DateTime.parse('2021-09-24'));
  print (str);
}

i tried above code on dartpad, you can use this to compare tow dateTime variables. As per above example, you can get more options to compare for eg duration.inDays,duration.inHours,duration.inSeconds etc.