Accessibility in Flutter Barcodes (SfBarcodeGenerator)

6 Aug 20261 minute to read

Sufficient contrast

The SfBarcodeGenerator theming support offers a consistent and standardized look, as well as the ability to customize colors for all UI elements.

You can customize colors for the following elements:

• Bar color
• Background color

Large fonts

The SfBarcodeGenerator automatically adjusts font size based on device settings and scales according to the MediaQueryData.textScaleFactor. It also allows you to change the font size of all text elements in the barcode generator.

• Input value of barcode

Screen reader support

The SfBarcodeGenerator supports Flutter’s built-in Semantics framework, which provides voice-over and TalkBack screen reader support. You can wrap the barcode generator in a Semantics widget and provide a descriptive label using the label property so that screen readers can announce the barcode’s input value. Alternatively, the Semantics widget can be placed on the parent container holding the SfBarcodeGenerator. This improves accessibility for visually impaired users, especially since barcodes are inherently visual elements that cannot be interpreted by screen readers without a meaningful label.