Beginning Flutter with Dart by Sinha Sanjib

Author:Sinha, Sanjib
Language: eng
Format: epub
Publisher: leanpub.com
Published: 2021-03-20T00:00:00+00:00

We have used two Dart files, ‘testing_my_first_app.dart’ and the ‘main.dart’. We have made our ‘main.dart’ file just a one-line code:

1 void main(List<String> args) => runApp(MyFirstApp());

We have seen the fat arrow notation ‘⇒’ before in our Dart practices. It can reduce any function to one line of code, when it calls one function.

The ‘testing_my_first_app.dart’ file starts with the Scaffold widget that has two main sub-trees widgets – appbar, and body. Let us see some code snippets from the appbar widget first.

1 appBar: AppBar( 2 leading: IconButton( 3 icon: Icon(Icons.menu), 4 tooltip: 'Navigation menu', 5 onPressed: null, 6 ), 7 title: Text( 8 'Test Your Knowledge...', 9 style: TextStyle( 10 fontSize: 25.00, 11 fontStyle: FontStyle.normal, 12 ), 13 ), 14 actions: <Widget>[ 15 IconButton( 16 icon: Icon(Icons.search), 17 tooltip: 'Search', 18 onPressed: null, 19 ), 20 ], 21 backgroundColor: Colors.redAccent, 22 ),

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