| <html> |
| <body> |
| <p> |
| The classes in this package are used for development of accessibility service that |
| provide alternative or augmented feedback to the user. |
| </p> |
| <p> |
| An {@link android.accessibilityservice.AccessibilityService} runs in the background and |
| receives callbacks by the system when {@link android.view.accessibility.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. |
| </p> |
| <p> |
| An {@link android.accessibilityservice.AccessibilityServiceInfo} describes an |
| {@link android.accessibilityservice.AccessibilityService}. The system notifies an |
| AccessibilityService for {@link android.view.accessibility.AccessibilityEvent}s |
| according to the information encapsulated in this class. |
| </p> |
| </body> |
| </html> |
