In this project there are shown six micro applications that show how to implement accessibility functions both in a native way (with Android Studio in Java for Android and with Xcode in Swift for iOS) and in a cross-platform way (with Xamarin in C#).
The Accessibility functions that are shown in these micro apps are:
- AccessibilityName: show how to specify the attributes that contribute to form the text-to-announce. The methods used are "View.contentDescription
" in native Android, "UIAccessibility.accessibilityLabel"/"UIAccessibility.accessibilityHint" in native iOS and "AutomationProperties.SetName"/"AutomationProperties.SetHelpText" in Xamarin.Forms. In Xamarin it is also shown how to use Dependency Service to achieve that, due to the problem related to empty labels.
- AccessibilitySpeech: show how to read a text with the screen-reader TTS. The methods used are "View.announceForAccessibility" in native Android, "UIAccessibility.post(notification: .announcement, argument: stringToRead)" in native iOS and in Xamarin it uses the native C# methods througth Dependency Service.
- AccessibleView: show how to set a listener for accessibility events (e.g an interface object acquires or loses the focus). In native Android you have to override "onInitializeAccessibilityEvent", in native iOS to override "UIAccessibilityFocus.accessibilityElementDidBecomeFocused" and in Xamarin you have to override the native C# methods througth Custom Renderer. 
- ChangeFocus: show how to assign the accessibility focus to a user interface object. The methods used are "View.sendAccessibilityEvent(AccessibilityEvent.WINDOWS_CHANGE_ACCESSIBILITY_FOCUSED)" in native Android, "UIAccessibility.post(notification:.screenChanged, argument: destinationView)" in native iOS and in Xamarin it uses the native C# methods througth Dependency Service.
- FocusOrder: show how to programmatically change the accessibility focus order. The methods used are "setAccessibilityTraversalAfter" in native Android, "UIAccessibilityContainer.UIView.accessibilityElements" in native iOS, and "TabIndex" in Xamarin.Forms
- HideFocus: show how to specify wheter a user interface object shouldn't receive the accessibility focus. The methods used are "View.importantForAccessibility" in native Android, "UIView.isAccessibilityElement" in native iOS and "AutomationProperties.SetIsInAccessibleTree" in Xamarin.Forms