xxxxxxxxxx
// instead of ThemeData.dark().copyWith use brightness: Brightness.dark
MaterialApp(
theme: ThemeData(
brightness: Brightness.dark,
fontFamily: 'MyFontFamily',
),
xxxxxxxxxx
ThemeData lightTheme = ThemeData.dark().copyWith(
textTheme: ThemeData.dark().textTheme.apply(
fontFamily: 'RobotoMono',
),
primaryTextTheme: ThemeData.dark().textTheme.apply(
fontFamily: 'RobotoMono',
),
accentTextTheme: ThemeData.dark().textTheme.apply(
fontFamily: 'RobotoMono',
),
);