AccessibilityDelegateCompat

Kotlin |Java

open class AccessibilityDelegateCompat

kotlin.Any
↳	androidx.core.view.AccessibilityDelegateCompat

Known Direct Subclasses ExploreByTouchHelper, RecyclerViewAccessibilityDelegate, RecyclerViewAccessibilityDelegate.ItemDelegate ExploreByTouchHelper ExploreByTouchHelper is a utility class for implementing accessibility support in custom Views that represent a collection of View-like logical items. RecyclerViewAccessibilityDelegate The AccessibilityDelegate used by RecyclerView. RecyclerViewAccessibilityDelegate.ItemDelegate The default implementation of accessibility delegate for the individual items of the RecyclerView.

Helper for accessing AccessibilityDelegate.

Note: On platform versions prior to API 23, delegate methods on views in the android.widget.* package are called before host methods. This prevents certain properties such as class name from being modified by overriding AccessibilityDelegateCompat#onInitializeAccessibilityNodeInfo(View, AccessibilityNodeInfoCompat), as any changes will be overwritten by the host class.

Starting in API 23, delegate methods are called after host methods, which all properties to be modified without being overwritten by the host class.

Summary

Public constructors
<init>() Creates a new instance.

Public methods
open Boolean	dispatchPopulateAccessibilityEvent(host: View!, event: AccessibilityEvent!) Dispatches an AccessibilityEvent to the host View first and then to its children for adding their text content to the event.
open AccessibilityNodeProviderCompat!	getAccessibilityNodeProvider(host: View!) Gets the provider for managing a virtual view hierarchy rooted at this View and reported to android.accessibilityservice.AccessibilityServices that explore the window content.
open Unit	onInitializeAccessibilityEvent(host: View!, event: AccessibilityEvent!) Initializes an AccessibilityEvent with information about the the host View which is the event source.
open Unit	onInitializeAccessibilityNodeInfo(host: View!, info: AccessibilityNodeInfoCompat!) Initializes an AccessibilityNodeInfoCompat with information about the host view.
open Unit	onPopulateAccessibilityEvent(host: View!, event: AccessibilityEvent!) Gives a chance to the host View to populate the accessibility event with its text content.
open Boolean	onRequestSendAccessibilityEvent(host: ViewGroup!, child: View!, event: AccessibilityEvent!) Called when a child of the host View has requested sending an AccessibilityEvent and gives an opportunity to the parent (the host) to augment the event.
open Boolean	performAccessibilityAction(host: View!, action: Int, args: Bundle!) Performs the specified accessibility action on the view.
open Unit	sendAccessibilityEvent(host: View!, eventType: Int) Sends an accessibility event of the given type.
open Unit	sendAccessibilityEventUnchecked(host: View!, event: AccessibilityEvent!) Sends an accessibility event.

Public constructors

<init>

AccessibilityDelegateCompat()

Creates a new instance.

Public methods

dispatchPopulateAccessibilityEvent

open fun dispatchPopulateAccessibilityEvent(
    host: View!, 
    event: AccessibilityEvent!
): Boolean

Dispatches an AccessibilityEvent to the host View first and then to its children for adding their text content to the event.

The default implementation behaves as View#dispatchPopulateAccessibilityEvent(AccessibilityEvent) for the case of no accessibility delegate been set.

Parameters