flutter-improving-accessibility
Implementing Flutter Accessibility
Contents
- UI Design and Styling
- Accessibility Widgets
- Web Accessibility
- Adaptive and Responsive Design
- Workflows
- Examples
UI Design and Styling
Design layouts to accommodate dynamic scaling and high visibility. Flutter automatically calculates font sizes based on OS-level accessibility settings.
- Font Scaling: Ensure layouts provide sufficient room to render all contents when font sizes are increased to their maximum OS settings. Avoid hardcoding fixed heights on text containers.
- Color Contrast: Maintain a contrast ratio of at least 4.5:1 for small text and 3.0:1 for large text (18pt+ regular or 14pt+ bold) to meet W3C standards.
- Tap Targets: Enforce a minimum tap target size of 48x48 logical pixels to accommodate users with limited dexterity.
Accessibility Widgets
Utilize Flutter's catalog of accessibility widgets to manipulate the semantics tree exposed to assistive technologies (like TalkBack or VoiceOver).
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