How to default gmt timezone in flutter

 DateTime.parse(json['modified_gmt']+'Z' as String)

how to hide keyboad in flutter

FocusScope.of(context).requestFocus(FocusNode());

How to set timeout when connect api in flutter

try {
  final request = await client.get(...);
  final response = await request.close()
    .timeout(const Duration(seconds: 2));
  // rest of the code
  ...
} on TimeoutException catch (_) {
  // A timeout occurred.
} on SocketException catch (_) {
  // Other exception
}

How to Get/set in flutter

class Foo {
  String bar; // normal field (getter/setter)
  final String baz; // read-only (getter)

  int _weight;
  set weight(int value) {
    assert(weight >= 0);
    _weight = value;
  }
  int get weight => _weight
}

// get time current
var today = new DateTime.now();
// add time var fiftyDaysFromNow = today.add(new Duration(days: 50));
// get timezome

var timezoneOffset = now.timeZoneOffset;

Fomat number in flutter

final formatter = new NumberFormat("#,###");
new Text(formatter.format(1234)), // formatted number will be: 1,234