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Variables
String a = 'name'; int b; dynamic c = 123; var v;
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Random Number
import 'dart:math'; Random().nextInt(4);
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Function
// Declaration normal function void changeDice() { // setState can be used here if it is necessary to change any // state which is dependent on the variable or action in this function } // calling a function changeDice();
// Declaration with variable defination void playMusic({int position}) { } // Calling playMusic(position: 1);
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Set State: setState is used if it is necessary to update any value / UI when the sate of the variable is changed
setState(() { });
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AssetImage :
AssetImage( 'images/ts.png',),
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CircleAvatar : Circular image view
CircleAvatar( radius: 80, backgroundImage: AssetImage( 'images/ts.png', ), ),
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Text : Text view
Text( "My Name", style: TextStyle( fontSize: 35, color: Colors.white, fontWeight: FontWeight.bold, fontFamily: 'Pacifico'), ),
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Divider : add a divider or between two view / widget
Divider( color: Colors.teal.shade100, ),
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SizedBox : Provide gap between two view / widget
SizedBox( height: 20.0, width: 150.0, child: Divider( color: Colors.teal.shade100, ), ),
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Icon: Use and customize material icons
Icon( Icons.phone, color: Colors.teal.shade900, size: 20.0, ),
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Card margin : set margin of a view
margin: EdgeInsets.symmetric(horizontal: 30.0, vertical: 10.0),
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Padding : set padding
Padding( padding: const EdgeInsets.all(16.0), child: Image.asset( 'images/dice1.png', ), ),
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Row: a row of a view , you can replace Row as Column
Row( children: [ Icon( Icons.phone, color: Colors.teal.shade900, size: 20.0, ), SizedBox( width: 20, ), Text( "+8801719144274", style: TextStyle( color: Colors.teal.shade900, fontSize: 20.0, ), ), ], ),
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ListTile : set view as small view like tile
ListTile( leading: Icon( Icons.mail, color: Colors.teal.shade900, size: 19.0, ), title: Text( "[email protected]", style: TextStyle( color: Colors.teal.shade900, fontSize: 20.0, ), ), ),
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Card : View like card, and making automatic rounded boarder
Card( margin: EdgeInsets.symmetric(horizontal: 30.0, vertical: 10.0), child: ListTile( leading: Icon( Icons.mail, color: Colors.teal.shade900, size: 19.0, ), title: Text( "[email protected]", style: TextStyle( color: Colors.teal.shade900, fontSize: 20.0, ), ), ), ),
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FloatingActionButton : floading or fab button
FloatingActionButton( backgroundColor: Colors.yellow, child: Icon( Icons.add, color: Colors.blue, ), ),
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Image Asset and Fonts config in .yaml : Configuration for image and fonts in pubspect.yaml file
assets: - images/ fonts: - family: Pacifico fonts: - asset: fonts/Pacifico-Regular.ttf -
Expanded : Equally distribute the views over the screen
Expanded( flex: 1, child: Image( image: AssetImage( 'images/dice1.png', ), ), ),
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Asset Image : load image from asset
Image.asset( 'images/dice1.png', )
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Center : Make the view in center position
Center( child: Row(), )
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MainAxisAlignment : It defines the positions of the children on a column.
mainAxisAlignment: MainAxisAlignment.center
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TextButton : we can use this button instead of FlatButton
TextButton( onPressed: () { print("Right button pressed"); }, child: Padding( padding: const EdgeInsets.all(8.0), child: Image.asset( 'images/dice1.png', ), ), ),
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FlatButton : Depricated
FlatButton( onPressed: () { print("Left button pressed"); }, child: Image.asset( 'images/dice1.png', ), ),
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