Provides a collection of classes for interacting with the accessibility system service and provides interfaces for sending accessibility events, querying the accessibility service status, and sending accessibility status change events.
The AccessibilitySystemAbilityClient class is used to create an accessibility
system client that interacts with the accessibility system service.
You can use the client to send accessibility events specified by
AccessibilityEventInfo to the accessibility ability for processing.
The AccessibilityStateObserver class is used to create an observer. You can
register the observer using AccessibilitySystemAbilityClient.
When the accessibility status changes, the observer will receive a status event specified by
AccessibilityStateEvent.
The AccessibilityAbilityInfo class describes the basic information about the
accessibility abilities. You can call this class
to query information about the accessibility ability.
| 接口 | 说明 |
|---|---|
| AccessibilityStateObserver |
Observes the accessibility status.
|
| 类 | 说明 |
|---|---|
| AccessibilityAbilityInfo |
Queries information about an accessibility ability.
|
| AccessibilityEventInfo |
Describes the accessibility event information and provides the information for the accessibility service.
|
| AccessibilityStateEvent |
Provides accessibility status events.
|
| AccessibilitySystemAbilityClient |
Provides a client for interacting with the accessibility ability.
|
| CaptionProperties |
Configures the visual properties of video captions, including the text size, language, foreground color,
background color, border properties, and font.
|