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.
| 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. |
Developers