How To Use Aspect Ratio Widget Using Flutter Android

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.red,
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Colors.pink[800],
          title: Text("Aspect Ratio Widget")),
      body: Center(
        child: AspectRatio(
          aspectRatio: 2.0,
          child: Container(
              height: 50.0,
              width: 50.0,
              color: Colors.red[800]
          ),
        ),
      ),
    );
  }
}