Creating the Material app

Now, we will add main.dart in order to create the final Material app. We'll create a stateless widget called MyApp and override the build() method:

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

Finally, we execute the code, as follows:

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

With that, we've finished creating an application that lets the user choose an image and modify its resolution.