The classes in this package are used to represent screen content and changes to it as well as APIs for querying the global accessibility state of the system.

Android.Views.Accessibility.AccessibilityEvent s are sent by the system when something notable happens in the user interface. For example, when a Android.Widget.Button is clicked, a Android.Views.View is focused, etc.

Android.Views.Accessibility.AccessibilityRecord contains information about state change of its source Android.Views.View. When a view fires an accessibility event it requests from its parent to dispatch the constructed event. The parent may optionally append a record for itself for providing more context to Android.AccessibilityServices.AccessibilityServices. Hence, accessibility services can facilitate additional accessibility records to enhance feedback.

Android.Views.Accessibility.AccessibilityNodeInfo represents a node of the window content as well as actions that can be requested from its source. From the point of view of an Android.AccessibilityServices.AccessibilityService a window content is presented as tree of accessibility node info which may or may not map one-to-one to the view hierarchy. In other words, a custom view is free to report itself as a tree of accessibility node info.

Android.Views.Accessibility.AccessibilityManager is a system level service that serves as an event dispatch for Android.Views.Accessibility.AccessibilityEvents, and provides facilities for querying the accessibility state of the system. Accessibility events are generated when something notable happens in the user interface, for example an Android.App.Activity starts, the focus or selection of a Android.Views.View changes etc. Parties interested in handling accessibility events implement and register an accessibility service which extends Android.AccessibilityServices.AccessibilityService.

Developer Guides

For more information about making applications accessible, read the Accessibility developer guide.