You almost had it right. You just did not use a named constructor: void main() { print(DateTime.now().millisecondsSinceEpoch); } Gives: 1351441456747 See the API documentation for more: https://api.dart.dev/stable/2.10.1/dart-core/DateTime-class.html
To hide counter value from TextField or TextFormField widget while using maxLength attribute, try following: TextField( decoration: InputDecoration( hintText: “Email”, counterText: “”, ), maxLength: 40, ), In this, I have set counterText attribute inside InputDecoration property with empty value. Hope it will help.
In order to enable this option globally in your project, here is what you need to do: In your main.dart file, add or import the following class: class MyHttpOverrides extends HttpOverrides{ @override HttpClient createHttpClient(SecurityContext? context){ return super.createHttpClient(context) ..badCertificateCallback = (X509Certificate cert, String host, int port)=> true; } } In your main function, add the following … Read more
import: import ‘package:flutter/services.dart’; And then Simply implement this: onTap: () async { await Clipboard.setData(ClipboardData(text: “your text”)); // copied successfully },
This will happen when there is no matching element, i.e. when a == b is never true for any of the elements in list and the optional parameter orElse is not specified. You can also specify orElse to handle the situation: list.firstWhere((a) => a == b, orElse: () => print(‘No matching element.’)); If you want … Read more
One Button showAlertDialog(BuildContext context) { // set up the button Widget okButton = TextButton( child: Text(“OK”), onPressed: () { }, ); // set up the AlertDialog AlertDialog alert = AlertDialog( title: Text(“My title”), content: Text(“This is my message.”), actions: [ okButton, ], ); // show the dialog showDialog( context: context, builder: (BuildContext context) { return … Read more
The ?? double question mark operator means “if null”. Take the following expression, for example. String a = b ?? ‘hello’; This means a equals b, but if b is null then a equals ‘hello’. Another related operator is ??=. For example: b ??= ‘hello’; This means if b is null then set it equal … Read more
Starting with Dart 2.6 you can define extensions on classes (Enums included). enum Cat { black, white } extension CatExtension on Cat { String get name { switch (this) { case Cat.black: return ‘Mr Black Cat’; case Cat.white: return ‘Ms White Cat’; default: return null; } } void talk() { print(‘meow’); } } Example: Cat … Read more
You can use the Positioned.fill with Align inside a Stack: Stack( children: <Widget>[ Positioned.fill( child: Align( alignment: Alignment.centerRight, child: …. ), ), ], ),
You should use the RichText widget. A RichText widget will take in a TextSpan widget that can also have a list of children TextSpans. Each TextSpan widget can have a different TextStyle. Here is the example code to render: Hello World var text = RichText( text: TextSpan( // Note: Styles for TextSpans must be explicitly … Read more