import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';


void main() {
  runApp(ListViewApp());
}
class ListViewApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    final title = 'Basic List';

    return MaterialApp(
      title: title,
      home: Scaffold(
        appBar: AppBar(
          title: Text(title),
        ),
        body: ConstrainedBox(
                constraints: BoxConstraints.tight(Size(double.infinity, 256)),
                child: Stack(
                  alignment: AlignmentDirectional.center,
                  children: [
                    Positioned(
                      top: 0.0,
                      child: Icon(Icons.calendar_today,
                          size: 128.0, color: Colors.lightBlueAccent),
                    ),
                    Positioned(
                        top: 2,
                        right: 140,
                        child: CircleAvatar(radius: 16, backgroundColor: Colors.red)),
                  ],
                ),
              ),
      ),
    );
  }
}