change fonts in entire app flutter code example
Example 1: flutter font bold
Text(
'Some text',
style: TextStyle(
fontSize: 24,
fontWeight: FontWeight.bold),
)
Example 2: how to set font family in flutter
MaterialApp(
title: 'Custom Fonts',
// Set Raleway as the default app font.
theme: ThemeData(fontFamily: 'Raleway'),
home: MyHomePage(),
);