Accessibility (ARIA) attributes in android and ios apps
The concept of ensuring accessibility in mobile applications is the same as in HTML/web development, but the specific implementation relies on the native APIs provided by Android and iOS, not ARIA attributes.
Both platforms offer comprehensive accessibility frameworks that map to the same conceptual goals as ARIA.
Android Accessibility Framework 🤖
Android uses the AccessibilityService framework, primarily relying on XML attributes and code calls to ensure elements are correctly described for services like TalkBack (Google's screen reader).
| ARIA Concept | Android Equivalent | Example |
|---|---|---|
aria-label (Description) | contentDescription | Set in XML (android:contentDescription="...") or programmatically for buttons and images without visible text. |
role (What is it?) | View Types & className | The view itself (e.g., Button, EditText) automatically conveys its role. You may override the class name for custom views. |
aria-expanded (State) | stateDescription & AccessibilityNodeInfo | You manually set the state of a custom view (e.g., "expanded" or "collapsed") using accessibility APIs. |
aria-live (Dynamic Update) | sendAccessibilityEvent() | Used to programmatically announce dynamic changes or status updates to the user via a TYPE_ANNOUNCEMENT event. |
iOS Accessibility Framework 🍎
iOS uses the UIAccessibility protocol, which is integrated into the core UIKit framework. The platform's screen reader is called VoiceOver.
| ARIA Concept | iOS Equivalent | Example |
|---|---|---|
aria-label (Description) | accessibilityLabel | A string property set on any UIView subclass to describe its content (e.g., "Play button"). |
role (What is it?) | accessibilityTraits | A bitmask property that describes the element's behavior (e.g., .button, .header, .image). |
aria-value (Current Value) | accessibilityValue | Used for slider or progress elements to describe their current setting (e.g., "75 percent"). |
aria-live (Dynamic Update) | UIAccessibility.post(notification:argument:) | Used to force VoiceOver to announce an event, such as an error or a successful form submission, using notification types like .announcement. |
In short, while you don't use the exact aria-* attributes, both native mobile ecosystems provide parallel, built-in tools to achieve the same goal: making digital interfaces usable by everyone.