Creating the material app

After making all the segments work properly, let's create the final material app. Inside the main.dart file, we create a StatelessWidget and override the build() method, as follows:

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

Finally, we execute the code as follows:

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

You should be able to have an app screen as shown in the following screenshot: 

Notice the captions displayed in the image, as follows:

• a laptop computer sitting on top of a desk.
• an open laptop computer sitting on top of a desk.
• an open laptop computer sitting on top of a wooden desk.

These captions are fairly accurate in their...