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<topic_start>
using the google fonts site
use the font’s details page to learn more about its static fonts.
use the following API to programmatically alter a static font
(but remember that this only works if the font was designed
to support the feature):
a FontFeature corresponds to an OpenType feature tag
and can be thought of as a boolean flag to enable or disable
a feature of a given font.
the following example is for CSS, but illustrates the concept:
<topic_end>
<topic_start>
other resources
the following video shows you some of the capabilities
of flutter’s typography and combines it with the material
and cupertino look and feel (depending on the platform
the app runs on), animation, and custom fragment shaders:
prototyping beautiful designs with flutter
to read one engineer’s experience
customizing variable fonts and animating them as they
morph (and was the basis for the above video),
check out playful typography with flutter,
a free article on medium. the associated example also
uses a custom shader.
<topic_end>
<topic_start>
use a custom font
<topic_end>
<topic_start>
what you’ll learn
although android and iOS offer high quality system fonts,
designers want support for custom fonts.
you might have a custom-built font from a designer,
or perhaps you downloaded a font from google fonts.
a typeface is the collection of glyphs or shapes that comprise
a given style of lettering.
a font is one representation of that typeface at a given weight or variation.
roboto is a typeface and roboto bold is a font.
flutter lets you apply a custom font across an entire app or to individual widgets.
this recipe creates an app that uses custom fonts with the following steps.
you don’t need to follow each step as you go.
the guide offers completed example files at the end.
info note
this guide makes the following presumptions:
<topic_end>
<topic_start>
choose a font
your choice of font should be more than a preference.
consider which file formats work with flutter and
how the font could affect design options and app performance.
<topic_end>
<topic_start>
pick a supported font format
flutter supports the following font formats:
flutter does not support fonts in the web open font format,
.woff and .woff2, on desktop platforms.
<topic_end>
<topic_start>
choose fonts for their specific benefits
few sources agree on what a font file type is or which uses less space.
the key difference between font file types involves how the format
encodes the glyphs in the file.
most TrueType and OpenType font files have similar capabilities as they
borrowed from each other as the formats and fonts improved over time.
which font you should use depends on the following considerations.
research what options a given font offers,
like more than one weight or style per font file,
variable font capability,
the availability of multiple font files for a multiple font weights,
or more than one width per font.
choose the typeface or font family that meets the design needs of your app.
to learn how to get direct access to over 1,000 open-sourced font families,
check out the google_fonts package.
to learn about another approach to using custom fonts that allows you to
re-use one font over multiple projects,
check out export fonts from a package.
<topic_end>
<topic_start>
import the font files
to work with a font, import its font files into your flutter project.
to import font files, perform the following steps.
if necessary, to match the remaining steps in this guide,
change the name of your flutter app to custom_fonts.
navigate to the root of your flutter project.
create a fonts directory at the root of your flutter project.
move or copy the font files in a fonts or assets
folder at the root of your flutter project.
the resulting folder structure should resemble the following:
<topic_end>
<topic_start>
declare the font in the pubspec.yaml file
after you’ve downloaded a font,
include a font definition in the pubspec.yaml file.
this font definition also specifies which font file should be used to
render a given weight or style in your app.
<topic_end>
<topic_start>
define fonts in the pubspec.yaml file
to add font files to your flutter app, complete the following steps.
open the pubspec.yaml file at the root of your flutter project.