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Android Reference

AccessibilityNodeProviderCompat


android.support.v4.view.accessibility

Class AccessibilityNodeProviderCompat

  • java.lang.Object
    • android.support.v4.view.accessibility.AccessibilityNodeProviderCompat


  • public class AccessibilityNodeProviderCompat
    extends Object
    Helper for accessing AccessibilityNodeProvider introduced after API level 4 in a backwards compatible fashion.
    • Constructor Detail

      • AccessibilityNodeProviderCompat

        public AccessibilityNodeProviderCompat()
        Creates a new instance.
      • AccessibilityNodeProviderCompat

        public AccessibilityNodeProviderCompat(Object provider)
        Creates a new instance wrapping an AccessibilityNodeProvider.
        Parameters:
        provider - The provider.
    • Method Detail

      • createAccessibilityNodeInfo

        public AccessibilityNodeInfoCompat createAccessibilityNodeInfo(int virtualViewId)
        Returns an AccessibilityNodeInfoCompat representing a virtual view, i.e. a descendant of the host View, with the given virtualViewId or the host View itself if virtualViewId equals to View.NO_ID.

        A virtual descendant is an imaginary View that is reported as a part of the view hierarchy for accessibility purposes. This enables custom views that draw complex content to report them selves as a tree of virtual views, thus conveying their logical structure.

        The implementer is responsible for obtaining an accessibility node info from the pool of reusable instances and setting the desired properties of the node info before returning it.

        Parameters:
        virtualViewId - A client defined virtual view id.
        Returns:
        A populated AccessibilityNodeInfoCompat for a virtual descendant or the host View.
        See Also:
        AccessibilityNodeInfoCompat
      • performAction

        public boolean performAction(int virtualViewId,
                            int action,
                            Bundle arguments)
        Performs an accessibility action on a virtual view, i.e. a descendant of the host View, with the given virtualViewId or the host View itself if virtualViewId equals to View.NO_ID.
        Parameters:
        virtualViewId - A client defined virtual view id.
        action - The action to perform.
        arguments - Optional arguments.
        Returns:
        True if the action was performed.
        See Also:
        createAccessibilityNodeInfo(int), AccessibilityNodeInfoCompat


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