Flutter

https://medium.com/@nils.backe/flutter-alert-dialogs-9b0bb9b01d28 https://stackoverflow.com/questions/50964365/alert-dialog-with-rounded-corners-in-flutter Dialogs In essence, dialogs are pop-up for further user verification/notification. There are few types of dialogs: AlertDialog  (rows of buttons below body). SimpleDialog  (handles scrolling of contents and no buttons below body). showCupertinoDialog  (iOS-style). showGeneralDialog  (allows customisations). showDialog () 3 Parameters. child is deprecated.  Return child from builder, example below. BuildContext context, Widget child,//deprecated WidgetBuilder builder, showDialog( context: context , barrierDismissible: true , builder: (BuildContext context) { return AlertDialog( content: new Text( "Welcome" ), actions: <Widget>[ new IconButton( icon: new Icon(Icons. launch ), onPressed: (){Naviga...

1. Aim Through Snackbar, understand Context and how to use builder to access any context of a widget. 2.Snackbar Code from Codelab If you use Scaffold.of(context), there will be Context Error "Scaffold.of() called with a context that does not contain a Scaffold" import 'package:flutter/material.dart' ; void main() { runApp( new MaterialApp(home: new SnackApp())); } class SnackApp extends StatefulWidget { @override _SnackAppState createState() => _SnackAppState(); } class _SnackAppState extends State<SnackApp> { @override Widget build(BuildContext context) { return new Scaffold( appBar: new AppBar( title: new Text( "Snackbar exercise" ), ), body: new Center( child: new RaisedButton( onPressed: (){ final snackBar = SnackBar(content: Text( 'Yay! A SnackBar!' )); Scaffold. of (context).showSnackBar(snackBar); }, ...

 When importing projects, "Dart SDK is not configured" error code may arise. It can be resolving by linking to  bin/cache/dart-sdk in Flutter folder. It usually happens with projects that were created in other machines. To fix this on Android Studio 3.1.3: File-> Settings (ctrl+alt+s) Languages and Frameworks -> Dart Check "Enable Dart support for the project..." In "Dart SDK path" click in "..." and navigate to flutter SDK directory. Under that directory you'll find  "bin/cache/dart-sdk" . This is the dart sdk path you should use. Click "Apply" Close the project and open it again (sometimes you need this step, sometimes doesn't) Tip 1: Having problem with fetching a package? Come across this error code: "A dependency may only have one source. sdk: flutter" This may be due to an a n indentation align with sdk (example below). dependencies : flutter : sdk : flutt...

https://medium.com/flutter-community/flutter-state-management-setstate-fn-is-the-easiest-and-the-most-powerful-44703c97f035

Animated Container https://medium.com/flutter-community/flutter-animated-series-animated-containers-52a5d52c0ad3

https://www.youtube.com/watch?time_continue=6&v=wmHT4EUnA-I

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