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.
AccessibilityRecord contains information about state change of its source 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 AccessibilityServices. Hence, accessibility services can facilitate additional accessibility records to enhance feedback.
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 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.
AccessibilityManager is a system level service that serves as an event dispatch for 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 Activity starts, the focus or selection of a View changes etc. Parties interested in handling accessibility events implement and register an accessibility service which extends AccessibilityService.
For more information about making applications accessible, read the Accessibility developer guide.
Developer GuidesView text traversed at movement granularity - represents the event of traversing the text of a view at a given granularity.
|AccessibilityManager||System level service that serves as an event dispatch for AccessibilityEvents, and provides facilities for querying the accessibility state of the system.|
|AccessibilityManager+IAccessibilityStateChangeListener||Listener for the system accessibility state.|
|AccessibilityNodeInfo||This class represents a node of the window content as well as actions that can be requested from its source.|
|AccessibilityNodeProvider||This class is the contract a client should implement to enable support of a virtual view hierarchy rooted at a given view for accessibility purposes.|
|AccessibilityRecord||Represents a record in an AccessibilityEvent and contains information about state change of its source View.|
|AccessibilityWindowInfo||This class represents a state snapshot of a window for accessibility purposes.|
|AccessibilityWindowType||Enumerates values returned by several types.|
|Action||Enumerates values returned by several types and taken as a parameter of the AccessibilityNodeInfo.AddAction, AccessibilityNodeInfo.PerformAction, and AccessibilityNodeInfo.PerformAction members.|
|CaptioningManager||Contains methods for accessing and monitoring preferred video captioning state and visual properties.|
|CaptionStyles||Enumerates values returned by several types.|
|ContentChangeTypes||Enumerates values returned by several types and taken as a parameter of the IViewParent.NotifySubtreeAccessibilityStateChanged, and ViewGroup.NotifySubtreeAccessibilityStateChanged members.|
|EventTypes||Enumerates values returned by several types and taken as a parameter of several types.|
|IAccessibilityEventSource||This interface is implemented by classes source of AccessibilityEvents.|
|MovementGranularity||Enumerates values returned by several types.|
|NodeFocus||Enumerates values returned by several types and taken as a parameter of several types.|
|RangeType||Enumerates values returned by several types and taken as a parameter of the AccessibilityNodeInfo+RangeInfo.Obtain member.|
|SelectionMode||Enumerates values returned by several types and taken as a parameter of the AccessibilityNodeInfo+CollectionInfo.Obtain member.|