떨림 중 시간대 패키지 사용하기

git clone https://github.com/srawlins/timezone.git
cd timezone
flutter pub get
flutter pub run tool/get -s 2020a
cd lib/data

cp lib/data/2020a* <project_dir>/assets/timezone/
cd <project_dir>
git add->commit->push

  Future<void> initTimezones() async {
    // get device timezone
    String dtz = await FlutterNativeTimezone.getLocalTimezone();

    // Load timezone data
    var byteData = await rootBundle.load('assets/timezone/2020a.tzf');
    tz.initializeDatabase(byteData.buffer.asUint8List());
    tz.initializeTimeZones();
    // set the local location.
    tz.setLocalLocation(tz.getLocation(dtz));

    // Iterate and use through the list of timezones.
    _locations = tz.timeZoneDatabase.locations;
    _locations.values.forEach((element) {
        print(element.name);
        print(element.currentTimeZone.abbr);
        print(element.currentTimeZone.offset);
        print(element.currentTimeZone.isDst);
        print(element.zones.length);
      });
  }