flutter - Row Coding

Everything expands to screenwidth inside a Listview. Can I change that?

You can use Align widget to align it’s child inside it’s parent. Simply wrap your list nodes (Card instances) inside a Align. import ‘package:flutter/material.dart’; //import ‘../../Library/Library.dart’; //import ‘../../Ui/ChatMessage.dart’; void main() { runApp( new MaterialApp( home: new ChatScreen(), ), ); } class ChatScreen extends StatefulWidget { @override State<StatefulWidget> createState() { return new ChatScreenState(); } } class …

Flutter Provider setState() or markNeedsBuild() called during build

by Tarik

You are calling fetchEvents from within your build code for the root widget. Within fetchEvents, you call notifyListeners, which, among other things, calls setState on widgets that are listening to the event provider. This is a problem because you cannot call setState on a widget when the widget is in the middle of rebuilding. Now …

Importance of Calling SetState inside initState

by Tarik

The setState() method notifies the framework that the internal state of the Stateful widget has changed. Calling this method is what triggers the widget to rebuild with the latest state values, so it is not necessary to call it inside the initState() lifecycle method since it is only called once when the widget is inserted …

Open flutter dialog after navigation

by Tarik

You can call the dialog from inside ‘initState()’ dalaying its appearance after the first frame has been drawn. @override void initState() { super.initState(); WidgetsBinding.instance.addPostFrameCallback((_) async { await showDialog<String>( context: context, builder: (BuildContext context) => new AlertDialog( title: new Text(“title”), content: new Text(“Message”), actions: <Widget>[ new FlatButton( child: new Text(“OK”), onPressed: () { Navigator.of(context).pop(); }, ), …

Error: Entrypoint isn’t within the current project

by Tarik

Delete the .idea folder inside the root of the flutter project and restart Android Studio. Refer to this question: What is the .idea folder? and make your decision if it’s safe or not to delete .idea folder.

How to rotate material icon in flutter without animation?

by Tarik

You can wrap your IconButton in a Transform widget using the rotate constructor: import ‘dart:math’ as math; Transform.rotate( angle: 180 * math.pi / 180, child: IconButton( icon: Icon( Icons.details, color: Colors.white, ), onPressed: null, ), ),

Widget not going to bottom of screen in Flutter?

by Tarik

You will solve using Expanded widget. Expanded( child: Align( alignment: FractionalOffset.bottomCenter, child: MaterialButton( onPressed: () => {}, child: Text(_register ? ‘REGISTER’ : ‘LOGIN’), ), ), ),

Horizontal listview not scrolling on web but scrolling on mobile

by Tarik

Flutter 2.5 Summary ScrollBehaviors now allow or disallow drag scrolling from specified PointerDeviceKinds. ScrollBehavior.dragDevices, by default, allows scrolling widgets to be dragged by all PointerDeviceKinds except for PointerDeviceKind.mouse. import ‘package:flutter/material.dart’; // Set ScrollBehavior for an entire application. MaterialApp( scrollBehavior: MyCustomScrollBehavior(), // … ); import ‘package:flutter/gestures.dart’; import ‘package:flutter/material.dart’; class MyCustomScrollBehavior extends MaterialScrollBehavior { // Override behavior …

Flutter remove border expansion tile

by Tarik

You can wrap it in a Theme widget and do like this: Theme( data: ThemeData().copyWith(dividerColor: Colors.transparent), child: ExpansionTile( or if you’re using custom theme settings, you can use Theme.of(context) instead of ThemeData() like this: Theme( data: Theme.of(context).copyWith(dividerColor: Colors.transparent), child: ExpansionTile(

Unable to add header for post method in dio in Flutter

by Tarik

Dio library key working perfectly fine in my case if we pass small case key value For example, Dio dio = new Dio(); dio.options.headers[‘content-Type’] = ‘application/json’; dio.options.headers[“authorization”] = “token ${token}”; response = await dio.post(url, data: data); make sure you write key in small case, that’s work for me.