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 AccessibilityEvent
s 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 AccessibilityEvent
s according to the information encapsulated in this class.
AccessibilityService.MagnificationController.OnMagnificationChangedListener | Listener for changes in the state of magnification. |
AccessibilityService.SoftKeyboardController.OnShowModeChangedListener | Listener for changes in the soft keyboard show mode. |
AccessibilityService | Accessibility services are intended 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.SoftKeyboardController | Used to control and query the soft keyboard show mode. |
AccessibilityServiceInfo | This class describes an AccessibilityService . |
GestureDescription | Accessibility services with the 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. |