Answers for "apply font in flutter"

flutter add custom fonts

flutter:
  fonts:
    - family: Proxima
      fonts:
        - asset: lib/fonts/ProximaNova-Regular.otf

In case you are using an emulator, go to the terminal and type "flutter clean" then "flutter pub get" to update the font used.

https://flutter.dev/custom-fonts/#from-packages

flutter:
  fonts:
    - family: Raleway
      fonts:
        - asset: fonts/Raleway-Regular.ttf
        - asset: fonts/Raleway-Italic.ttf
          style: italic
    - family: RobotoMono
      fonts:
        - asset: fonts/RobotoMono-Regular.ttf
        - asset: fonts/RobotoMono-Bold.ttf
          weight: 700