fluter material icon code example

Example 1: circle around icon flutter

CircleAvatar(
   backgroundColor: Colors.white,
   radius: 30,
   child: Icon(Icons.add),
),

Example 2: how to use flaticon as icon in flutter

import 'package:flat_icons_flutter/flat_icons_flutter.dart';

class MyWidget extends StatelessWidget {
  Widget build(BuildContext context) {
    return new IconButton(
      // Use the FlatIcons class for the IconData
      icon: new Icon(FlatIcons.home),
      onPressed: () { print("Pressed"); }
     );
  }
}