Android APIs
public final class

AccessibilityServiceInfoCompat

extends Object
java.lang.Object
   ↳ android.support.v4.accessibilityservice.AccessibilityServiceInfoCompat

Class Overview

Helper for accessing features in AccessibilityService introduced after API level 4 in a backwards compatible fashion.

Summary

Constants
int CAPABILITY_CAN_FILTER_KEY_EVENTS Capability: This accessibility service can filter the key event stream.
int CAPABILITY_CAN_REQUEST_ENHANCED_WEB_ACCESSIBILITY Capability: This accessibility service can request enhanced web accessibility enhancements.
int CAPABILITY_CAN_REQUEST_TOUCH_EXPLORATION Capability: This accessibility service can request touch exploration mode in which touched items are spoken aloud and the UI can be explored via gestures.
int CAPABILITY_CAN_RETRIEVE_WINDOW_CONTENT Capability: This accessibility service can retrieve the active window content.
int DEFAULT If an AccessibilityService is the default for a given type.
int FEEDBACK_ALL_MASK Mask for all feedback types.
int FEEDBACK_BRAILLE Denotes braille feedback.
int FLAG_INCLUDE_NOT_IMPORTANT_VIEWS If this flag is set the system will regard views that are not important for accessibility in addition to the ones that are important for accessibility.
int FLAG_REPORT_VIEW_IDS This flag requests that the AccessibilityNodeInfos obtained by an AccessibilityService contain the id of the source view.
int FLAG_REQUEST_ENHANCED_WEB_ACCESSIBILITY This flag requests from the system to enable web accessibility enhancing extensions.
int FLAG_REQUEST_FILTER_KEY_EVENTS This flag requests from the system to filter key events.
int FLAG_REQUEST_TOUCH_EXPLORATION_MODE This flag requests that the system gets into touch exploration mode.
Public Methods
static String capabilityToString(int capability)
Returns the string representation of a capability.
static String feedbackTypeToString(int feedbackType)
Returns the string representation of a feedback type.
static String flagToString(int flag)
Returns the string representation of a flag.
static boolean getCanRetrieveWindowContent(AccessibilityServiceInfo info)
Whether this service can retrieve the current window's content.
static int getCapabilities(AccessibilityServiceInfo info)
Returns the bit mask of capabilities this accessibility service has such as being able to retrieve the active window content, etc.
static String getDescription(AccessibilityServiceInfo info)
Description of the accessibility service.
static String getId(AccessibilityServiceInfo info)
The accessibility service id.
static ResolveInfo getResolveInfo(AccessibilityServiceInfo info)
The service ResolveInfo.
static String getSettingsActivityName(AccessibilityServiceInfo info)
The settings activity name.
[Expand]
Inherited Methods
From class java.lang.Object

Constants

public static final int CAPABILITY_CAN_FILTER_KEY_EVENTS

Capability: This accessibility service can filter the key event stream.

Constant Value: 8 (0x00000008)

public static final int CAPABILITY_CAN_REQUEST_ENHANCED_WEB_ACCESSIBILITY

Capability: This accessibility service can request enhanced web accessibility enhancements. For example, installing scripts to make app content more accessible.

Constant Value: 4 (0x00000004)

public static final int CAPABILITY_CAN_REQUEST_TOUCH_EXPLORATION

Capability: This accessibility service can request touch exploration mode in which touched items are spoken aloud and the UI can be explored via gestures.

Constant Value: 2 (0x00000002)

public static final int CAPABILITY_CAN_RETRIEVE_WINDOW_CONTENT

Capability: This accessibility service can retrieve the active window content.

Constant Value: 1 (0x00000001)

public static final int DEFAULT

If an AccessibilityService is the default for a given type. Default service is invoked only if no package specific one exists. In case of more than one package specific service only the earlier registered is notified.

Constant Value: 1 (0x00000001)

public static final int FEEDBACK_ALL_MASK

Mask for all feedback types.

Constant Value: -1 (0xffffffff)

public static final int FEEDBACK_BRAILLE

Denotes braille feedback.

Constant Value: 32 (0x00000020)

public static final int FLAG_INCLUDE_NOT_IMPORTANT_VIEWS

If this flag is set the system will regard views that are not important for accessibility in addition to the ones that are important for accessibility. That is, views that are marked as not important for accessibility via IMPORTANT_FOR_ACCESSIBILITY_NO or IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS and views that are marked as potentially important for accessibility via IMPORTANT_FOR_ACCESSIBILITY_AUTO for which the system has determined that are not important for accessibility, are both reported while querying the window content and also the accessibility service will receive accessibility events from them.

Note: For accessibility services targeting API version JELLY_BEAN or higher this flag has to be explicitly set for the system to regard views that are not important for accessibility. For accessibility services targeting API version lower than JELLY_BEAN this flag is ignored and all views are regarded for accessibility purposes.

Usually views not important for accessibility are layout managers that do not react to user actions, do not draw any content, and do not have any special semantics in the context of the screen content. For example, a three by three grid can be implemented as three horizontal linear layouts and one vertical, or three vertical linear layouts and one horizontal, or one grid layout, etc. In this context the actual layout mangers used to achieve the grid configuration are not important, rather it is important that there are nine evenly distributed elements.

Constant Value: 2 (0x00000002)

public static final int FLAG_REPORT_VIEW_IDS

This flag requests that the AccessibilityNodeInfos obtained by an AccessibilityService contain the id of the source view. The source view id will be a fully qualified resource name of the form "package:id/name", for example "foo.bar:id/my_list", and it is useful for UI test automation. This flag is not set by default.

Constant Value: 16 (0x00000010)

public static final int FLAG_REQUEST_ENHANCED_WEB_ACCESSIBILITY

This flag requests from the system to enable web accessibility enhancing extensions. Such extensions aim to provide improved accessibility support for content presented in a WebView. An example of such an extension is injecting JavaScript from a secure source. The system will enable enhanced web accessibility if there is at least one accessibility service that has this flag set. Hence, clearing this flag does not guarantee that the device will not have enhanced web accessibility enabled since there may be another enabled service that requested it.

Services that want to set this flag have to declare this capability in their meta-data by setting the attribute canRequestEnhancedWebAccessibility to true, otherwise this flag will be ignored. For how to declare the meta-data of a service refer to AccessibilityService.SERVICE_META_DATA.

Constant Value: 8 (0x00000008)

public static final int FLAG_REQUEST_FILTER_KEY_EVENTS

This flag requests from the system to filter key events. If this flag is set the accessibility service will receive the key events before applications allowing it implement global shortcuts. Setting this flag does not guarantee that this service will filter key events since only one service can do so at any given time. This avoids user confusion due to behavior change in case different key filtering services are enabled. If there is already another key filtering service enabled, this one will not receive key events.

Services that want to set this flag have to declare this capability in their meta-data by setting the attribute canRequestFilterKeyEvents to true, otherwise this flag will be ignored. For how to declare the meta -data of a service refer to AccessibilityService.SERVICE_META_DATA.

Constant Value: 32 (0x00000020)

public static final int FLAG_REQUEST_TOUCH_EXPLORATION_MODE

This flag requests that the system gets into touch exploration mode. In this mode a single finger moving on the screen behaves as a mouse pointer hovering over the user interface. The system will also detect certain gestures performed on the touch screen and notify this service. The system will enable touch exploration mode if there is at least one accessibility service that has this flag set. Hence, clearing this flag does not guarantee that the device will not be in touch exploration mode since there may be another enabled service that requested it.

For accessibility services targeting API version higher than JELLY_BEAN_MR1 that want to set this flag have to declare this capability in their meta-data by setting the attribute canRequestTouchExplorationMode to true, otherwise this flag will be ignored. For how to declare the meta-data of a service refer to AccessibilityService.SERVICE_META_DATA.

Services targeting API version equal to or lower than JELLY_BEAN_MR1 will work normally, i.e. the first time they are run, if this flag is specified, a dialog is shown to the user to confirm enabling explore by touch.

Constant Value: 4 (0x00000004)

Public Methods

public static String capabilityToString (int capability)

Returns the string representation of a capability. For example, CAPABILITY_CAN_RETRIEVE_WINDOW_CONTENT is represented by the string CAPABILITY_CAN_RETRIEVE_WINDOW_CONTENT.

Parameters
capability int: The capability.
Returns
String The string representation.

public static String feedbackTypeToString (int feedbackType)

Returns the string representation of a feedback type. For example, FEEDBACK_SPOKEN is represented by the string FEEDBACK_SPOKEN.

Parameters
feedbackType int: The feedback type.
Returns
String The string representation.

public static String flagToString (int flag)

Returns the string representation of a flag. For example, DEFAULT is represented by the string DEFAULT.

Parameters
flag int: The flag.
Returns
String The string representation.

public static boolean getCanRetrieveWindowContent (AccessibilityServiceInfo info)

Whether this service can retrieve the current window's content.

Statically set from meta-data.

Parameters
info AccessibilityServiceInfo
Returns
boolean True window content can be retrieved.

public static int getCapabilities (AccessibilityServiceInfo info)

Returns the bit mask of capabilities this accessibility service has such as being able to retrieve the active window content, etc.

Parameters
info AccessibilityServiceInfo: The service info whose capabilities to get.
Returns
int The capability bit mask.

public static String getDescription (AccessibilityServiceInfo info)

Description of the accessibility service.

Statically set from meta-data.

Parameters
info AccessibilityServiceInfo
Returns
String The description.

public static String getId (AccessibilityServiceInfo info)

The accessibility service id.

Generated by the system.

Parameters
info AccessibilityServiceInfo
Returns
String The id.

public static ResolveInfo getResolveInfo (AccessibilityServiceInfo info)

The service ResolveInfo.

Generated by the system.

Parameters
info AccessibilityServiceInfo
Returns
ResolveInfo The info.

public static String getSettingsActivityName (AccessibilityServiceInfo info)

The settings activity name.

Statically set from meta-data.

Parameters
info AccessibilityServiceInfo
Returns
String The settings activity name.