Answered by : vastemonde

// Add debugShowCheckedModeBanner: false to your Material
return new MaterialApp(	debugShowCheckedModeBanner: false, theme: new ThemeData( primarySwatch: Colors.green, ), //...
);

Source : https://stackoverflow.com/questions/48893935/how-to-remove-the-flutter-debug-banner | Last Update : Sun, 30 May 21

Answered by : friendly-finch-zwil4b4pl9n0

MaterialApp( debugShowCheckedModeBanner: false
)

Source : https://stackoverflow.com/questions/48893935/how-to-remove-debug-banner-in-flutter-on-android-emulator | Last Update : Wed, 27 May 20