android.accessibilityservice

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The classes in this package are used for development of accessibility service that provide alternative or augmented feedback to the user.

An AccessibilityService runs in the background and receives callbacks by the system when AccessibilityEvents are fired. Such events denote some state transition in the user interface, for example, the focus has changed, a button has been clicked, etc. Such a service can optionally request the capability for querying the content of the active window. Development of an accessibility service requires extends this class and implements its abstract methods.

An AccessibilityServiceInfo describes an AccessibilityService. The system notifies an AccessibilityService for AccessibilityEvents according to the information encapsulated in this class.

Interfaces

AccessibilityService.MagnificationController.OnMagnificationChangedListener	Listener for changes in the state of magnification.
AccessibilityService.SoftKeyboardController.OnShowModeChangedListener	Listener for changes in the soft keyboard show mode.
AccessibilityService.TakeScreenshotCallback	Interface used to report status of taking screenshot.
BrailleDisplayController	Used to communicate with a Braille display that supports the Braille display HID standard (usage page 0x41).
BrailleDisplayController.BrailleDisplayCallback	Interface provided to BrailleDisplayController connection methods to receive callbacks from the system.
TouchInteractionController.Callback	callbacks allow services to receive motion events and state change updates.

Classes

AccessibilityButtonController	Controller for the accessibility button within the system's navigation area This class may be used to query the accessibility button's state and register callbacks for interactions with and state changes to the accessibility button when AccessibilityServiceInfo#FLAG_REQUEST_ACCESSIBILITY_BUTTON is set.
AccessibilityButtonController.AccessibilityButtonCallback	Callback for interaction with and changes to state of the accessibility button within the system's navigation area.
AccessibilityGestureEvent	This class describes the gesture event including gesture id and which display it happens on.
AccessibilityService	Accessibility services should only be used to assist users with disabilities in using Android devices and apps.
AccessibilityService.GestureResultCallback	Class used to report status of dispatched gestures
AccessibilityService.MagnificationController	Used to control and query the state of display magnification.
AccessibilityService.ScreenshotResult	Can be used to construct a bitmap of the screenshot or any other operations for AccessibilityService#takeScreenshot API.
AccessibilityService.SoftKeyboardController	Used to control, query, and listen for changes to the soft keyboard show mode.
AccessibilityServiceInfo	This class describes an AccessibilityService.
FingerprintGestureController	An AccessibilityService can capture gestures performed on a device's fingerprint sensor, as long as the device has a sensor capable of detecting gestures.
FingerprintGestureController.FingerprintGestureCallback	Class that is called back when fingerprint gestures are being used for accessibility.
GestureDescription	Accessibility services with the R.styleable.AccessibilityService_canPerformGestures property can dispatch gestures.
GestureDescription.Builder	Builder for a GestureDescription
GestureDescription.StrokeDescription	Immutable description of stroke that can be part of a gesture.
InputMethod	This class provides input method APIs.
InputMethod.AccessibilityInputConnection	This class provides the allowed list of InputConnection APIs for accessibility services.
MagnificationConfig	This class describes the magnification config for AccessibilityService to control the magnification.
MagnificationConfig.Builder	Builder for creating MagnificationConfig objects.
TouchInteractionController	This class allows a service to handle touch exploration and the detection of specialized accessibility gestures.