I want to represent the time the file was saved as a string. The time in my country is 9 hours ahead of utc time. How can I change the current utc time to 9 hours faster?
String _getTime({required String filePath}) {
String fromPath = filePath.substring(
filePath.lastIndexOf('/') + 1, filePath.lastIndexOf('.'));
if (fromPath.startsWith("1", 0)) {
DateTime dateTime =
DateTime.fromMillisecondsSinceEpoch(int.parse(fromPath));
var dateLocal = dateTime.toLocal();
print(dateLocal);
print(dateTime);
int year = dateLocal.year;
int month = dateLocal.month;
int day = dateLocal.day;
int hour = dateLocal.hour;
int min = dateLocal.minute;
String dato = '$year-$month-$day--$hour:$min';
return dato;
} else {
return "No Date";
}
}
Use this package ---->>>>> https://pub.dev/packages/flutter_native_timezone
Add the package dependencies to your project, import the package into the file you're working in and write the code below to get your currenTimeZone
final String currentTimeZone = await FlutterNativeTimezone.getLocalTimezone();
debugPrint(currentTimeZone);
Related
I want to get all four weeks (first and last day date) on the current month with Monday as the start of the week.
I can only figure out how to get the current week's first and last date with this code:
var firstDayOfTheWeek = DateTime.now().subtract(Duration(days: DateTime.now().weekday - 1));
var lastDayOfTheWeek = DateTime.now().add(Duration(days: DateTime.daysPerWeek - DateTime.now().weekday));
Thanks in advance!
Below method return next weekday's DateTime what you want from now or specific day.
DateTime getNextWeekDay(int weekDay, {DateTime from}) {
DateTime now = DateTime.now();
if (from != null) {
now = from;
}
int remainDays = weekDay - now.weekday + 7;
return now.add(Duration(days: remainDays));
}
The weekday parameter can be came like below DateTime const value or just int value.
class DateTime {
...
static const int monday = 1;
static const int tuesday = 2;
static const int wednesday = 3;
static const int thursday = 4;
static const int friday = 5;
static const int saturday = 6;
static const int sunday = 7;
...
}
If you want to get next Monday from now, call like below.
DateTime nextMonday = getNextWeekDay(DateTime.monday);
If you want to get next next Monday from now, call like below.
Or you just add 7 days to 'nextMonday' variable.
DateTime nextMonday = getNextWeekDay(DateTime.monday);
DateTime nextNextMonday = getNextWeekDay(DateTime.monday, from: nextMonday);
or
DateTime nextNextMonday = nextMonday.add(Duration(days: 7));
I need to check date is between two dates or not.
I tried to search it but didn't got fruitful results.
May be you have seen such scenarios. So, seeking your advise.
Here is my code.
var service_start_date = '2020-10-17';
var service_end_date = '2020-10-23';
var service_start_time = '10:00:00';
var service_end_time = '11:00:00';
DateTime currentDate = new DateTime.now();
DateTime times = DateTime.now();
#override
void initState() {
super.initState();
test();
}
test() {
String currenttime = DateFormat('HH:mm').format(times);
String currentdate = DateFormat('yyyy-mm-dd').format(currentDate);
print(currenttime);
print(currentdate);
}
So, basically i have start date and end date. I need to check current date is falling between these two dates or not.
You can check before/after using 'isBefore' and 'isAfter' in 'DateTime' class.
DateTime startDate = DateTime.parse(service_start_date);
DateTime endDate = DateTime.parse(service_end_date);
DateTime now = DateTime.now();
print('now: $now');
print('startDate: $startDate');
print('endDate: $endDate');
print(startDate.isBefore(now));
print(endDate.isAfter(now));
I've made a series of extensions
extension DateTimeExtension on DateTime? {
bool? isAfterOrEqualTo(DateTime dateTime) {
final date = this;
if (date != null) {
final isAtSameMomentAs = dateTime.isAtSameMomentAs(date);
return isAtSameMomentAs | date.isAfter(dateTime);
}
return null;
}
bool? isBeforeOrEqualTo(DateTime dateTime) {
final date = this;
if (date != null) {
final isAtSameMomentAs = dateTime.isAtSameMomentAs(date);
return isAtSameMomentAs | date.isBefore(dateTime);
}
return null;
}
bool? isBetween(
DateTime fromDateTime,
DateTime toDateTime,
) {
final date = this;
if (date != null) {
final isAfter = date.isAfterOrEqualTo(fromDateTime) ?? false;
final isBefore = date.isBeforeOrEqualTo(toDateTime) ?? false;
return isAfter && isBefore;
}
return null;
}
}
I'm hoping they're self explanatory but obviously you can call them like
DateTime.now().isBefore(yourDate)
DateTime.now().isAfter(yourDate)
DateTime.now().isBetween(fromDate, toDate)
Don't forget to check if the day is the same as the one of the two dates also
by adding an or to the condition ex:
if ( start is before now || (start.month==now.month && start.day==now.day ...etc)
I get information in a JSON and I'm parsing that to my app.
The date is a string, so I know I need to calculate that in string.
final s = all[index].lastdate; <-- This is where my problem is, i cant access the json from this.
final formatter = DateFormat('yyyy-MM-dd');
final dateTime = formatter.parse(s);
final now = DateTime.now();
final difference = now.difference(dateTime).inDays;
final days ;
if (difference == 0) {
final days = "New";
} else if (difference == 1) {
final days = (difference.toString() + " day");
} else {
final days = (difference.toString() + " days");
}
I'm writing a flutter app to clone some Youtube functionalities using Youtube API V3.
The app fetches video timestamp as a String from youtube video API
Each timestamp has this format :
YYYY-MM-DDTHH:MM:SSZ
One example would be:
2020-07-12T20:42:19Z
I would like to display in a text :
1 hour
1 hours ago
4 weeks ago
11 months ago
1 year ago
...
I've created an extension on String
extension StringExtension on String {
static String displayTimeAgoFromTimestamp(String timestamp) {
final year = int.parse(timestamp.substring(0, 4));
final month = int.parse(timestamp.substring(5, 7));
final day = int.parse(timestamp.substring(8, 10));
final hour = int.parse(timestamp.substring(11, 13));
final minute = int.parse(timestamp.substring(14, 16));
final DateTime videoDate = DateTime(year, month, day, hour, minute);
final int diffInHours = DateTime.now().difference(videoDate).inHours;
String timeAgo = '';
String timeUnit = '';
int timeValue = 0;
if (diffInHours < 1) {
final diffInMinutes = DateTime.now().difference(videoDate).inMinutes;
timeValue = diffInMinutes;
timeUnit = 'minute';
} else if (diffInHours < 24) {
timeValue = diffInHours;
timeUnit = 'hour';
} else if (diffInHours >= 24 && diffInHours < 24 * 7) {
timeValue = (diffInHours / 24).floor();
timeUnit = 'day';
} else if (diffInHours >= 24 * 7 && diffInHours < 24 * 30) {
timeValue = (diffInHours / (24 * 7)).floor();
timeUnit = 'week';
} else if (diffInHours >= 24 * 30 && diffInHours < 24 * 12 * 30) {
timeValue = (diffInHours / (24 * 30)).floor();
timeUnit = 'month';
} else {
timeValue = (diffInHours / (24 * 365)).floor();
timeUnit = 'year';
}
timeAgo = timeValue.toString() + ' ' + timeUnit;
timeAgo += timeValue > 1 ? 's' : '';
return timeAgo + ' ago';
}
}
Then call in text:
StringExtension.displayTimeAgoFromTimestamp(video.timestamp)
You can use the timeago package
example code below
import 'package:timeago/timeago.dart' as timeago;
main() {
final fifteenAgo = new DateTime.now().subtract(new Duration(minutes: 15));
print(timeago.format(fifteenAgo)); // 15 minutes ago
print(timeago.format(fifteenAgo, locale: 'en_short')); // 15m
print(timeago.format(fifteenAgo, locale: 'es')); // hace 15 minutos
}
to use it with the YYYY-MM-DDTHH:MM:SSZ time format you can convert the String to a DateTime then perform the operation on the DateTime variable
DateTime time = DateTime.parse("2020-07-12T20:42:19Z");
print(timeago.format(time));
I've created reusable function for sample, this might be helpful!!
import 'package:intl/intl.dart';
//for DateTime manipulation need to add this package
import 'package:timeago/timeago.dart' as timeago;
void main(){
//creating this getTimeAgo function to format dateTime with user inputs
dynamic getTimeAgo(DateTime d) {
dynamic value = "";
//setting current time variable now
final now = DateTime.now();
//converting the user provided date to LocalTime
final recvDate = d.toLocal();
//declaring today's date in today variable
final today = DateTime(now.year, now.month, now.day);
//declaring yesterday's date in yesterday variable
final yesterday = DateTime(now.year, now.month, now.day - 1);
//declaring user provided date's in date variable
final date = DateTime(recvDate.year, recvDate.month, recvDate.day);
//comparing today's date is equal to user provided date then return value with timeAgo flutter package response
if (date == today) {
final curtimeNow = timeago.format(d);
if (curtimeNow == 'a day ago') {
value = "1 day ago";
} else if (curtimeNow == 'about an hour ago') {
value = "1 hour ago";
} else {
value = curtimeNow;
}
} //comparing yesterday's date is equal to user provided date then return 1 day ago
else if (date == yesterday) {
value='1 day ago';
} //else the user provided date then return as the date format of dd MMM yyyy Eg. 10 Mar 2022
else {
value = DateFormat('dd MMM yyyy').format(date);
}
//returning the response
return value;
}
//declaring the date which is to used be formatted
var recvdDateTime=DateTime.now().subtract(Duration(minutes: 45));;
//calling the getTimeAgo (fn) with user input
getTimeAgo(DateTime.parse(recvdDateTime));
}
How do I get the current week of the month as a number in Dart? I need to create some sort of calender with a week view where it says something like "2. Week of January"
You can use DateTime().now() to get the current time and date of the system or today's date also. Here is the code snippet below:
// Current date and time of system
String date = DateTime.now().toString();
// This will generate the time and date for first day of month
String firstDay = date.substring(0, 8) + '01' + date.substring(10);
// week day for the first day of the month
int weekDay = DateTime.parse(firstDay).weekday;
DateTime testDate = DateTime.now();
int weekOfMonth;
// If your calender starts from Monday
weekDay--;
weekOfMonth = ((testDate.day + weekDay) / 7).ceil();
print('Week of the month: $weekOfMonth');
weekDay++;
// If your calender starts from sunday
if (weekDay == 7) {
weekDay = 0;
}
weekOfMonth = ((testDate.day + weekDay) / 7).ceil();
print('Week of the month: $weekOfMonth');
Alternatively, if are looking for a complete implementation of the calender month UI then click here
My Answer is impaired from #dblank answer
extension DateTimeExtension on DateTime {
int get weekOfMonth {
var date = this;
final firstDayOfTheMonth = DateTime(date.year, date.month, 1);
int sum = firstDayOfTheMonth.weekday - 1 + date.day;
if (sum % 7 == 0) {
return sum ~/ 7;
} else {
return sum ~/ 7 + 1;
}
}
}
Then use it like this:
var wom = DateTime.now().weekOfMonth;
extension DateTimeExtension on DateTime {
int get weekOfMonth {
var wom = 0;
var date = this;
while (date.month == month) {
wom++;
date = date.subtract(const Duration(days: 7));
}
return wom;
}
}
Then use it like this:
var wom = DateTime.now().weekOfMonth;