Typographic styling helps define a UI’s information hierarchy and function. Typography choices can also greatly affect legibility, which is an important consideration for driving.
Guidance at a glance (TL;DR):
- Use display, body, and subtext from the Android Auto typographic scale
- Minimum body text size is 24dp – reserve subtext sizes for non-crucial information
- Use a 4-dp grid for alignment
- Apply style attributes to create effects (support hierarchy, focus attention)
- Use medium font weights sparingly – and avoid bold
Scale and grid references
Use the Android Auto typographic scale and typesetting grid to ensure a consistent look and glanceable text at a range of levels for display text, body text, and subtext.
Android Auto typographic scale
This scale shows the fonts, font sizes, and line heights used for the nine default levels of display text, body text, and subtext used in Android Auto.
The minimum type size for Android Auto is 24dp. Sizes below 24dp are not easily glanceable and should be used sparingly in the auto context. Subtext sizes are best reserved for non-crucial or tertiary information such as status bar content.
Typesetting grid and baseline reference
Maintaining the scale and vertical rhythm based on a 4dp grid helps with consistency and visual hierarchy.
Guidance and examples
Applying scale and style to your typographic choices can help you:
- Keep all text legible
- Convey a visual hierarchy among text elements
- Focus attention in the most important spots
The sections below provide guidance and examples for how to apply scale and style appropriately.
Google Sans should be used for type sizes 32dp and larger. Roboto is used everywhere else as a functional typeface because it is legible in much smaller sizes.
Each style consists of a set of values defined by the scale and additional attributes. These attributes include font weight, color, and opacity values, and they can be added to any type size to create a desired effect, such as focusing attention.