How to increase font size across entire MaterialApp?

Question

I have a MaterialApp in Flutter and want to scale up text throughout the entire app when a certain fontFamily is used in ThemeData.

Is this because this certain fontFamily looks smaller than other fonts.

Is there a way to scale up the font size of the entire app using ThemeData?

Answer 1

In ThemeData you have textTheme property in which you can set the TextTheme for all widgets under that MaterialApp. In TextTheme you can set TextStyle for various types of texts in you app using parameters like caption, subhead etc. You can increase the size of the font by providing value for fontSize property in TextStyle

Something like this:

MaterialApp(
  theme: ThemeData(
    textTheme: TextTheme(
      caption: TextStyle(
        fontSize: 22.0
      ),
      body1: TextStyle(
          fontSize: 22.0
      ),
    ),
  ),
);