Java Code Examples for android.support.v4.view.accessibility.AccessibilityNodeInfoCompat#recycle()

@Override
public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfoCompat info) {
    if (CAN_HIDE_DESCENDANTS) {
        super.onInitializeAccessibilityNodeInfo(host, info);
    } else {
        // Obtain a node for the host, then manually generate the list
        // of children to only include non-obscured views.
        final AccessibilityNodeInfoCompat superNode =
                AccessibilityNodeInfoCompat.obtain(info);
        super.onInitializeAccessibilityNodeInfo(host, superNode);

        info.setSource(host);
        final ViewParent parent = ViewCompat.getParentForAccessibility(host);
        if (parent instanceof View) {
            info.setParent((View) parent);
        }
        copyNodeInfoNoChildren(info, superNode);
        superNode.recycle();

        addChildrenForAccessibility(info, (ViewGroup) host);
    }

    info.setClassName(DrawerLayout.class.getName());
}
 

@Override
public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfoCompat info) {
    final AccessibilityNodeInfoCompat superNode = AccessibilityNodeInfoCompat.obtain(info);
    super.onInitializeAccessibilityNodeInfo(host, superNode);

    info.setSource(host);
    final ViewParent parent = ViewCompat.getParentForAccessibility(host);
    if (parent instanceof View) {
        info.setParent((View) parent);
    }
    copyNodeInfoNoChildren(info, superNode);

    superNode.recycle();

    final int childCount = getChildCount();
    for (int i = 0; i < childCount; i++) {
        final View child = getChildAt(i);
        if (!filter(child)) {
            info.addChild(child);
        }
    }
}
 

private static AccessibilityNodeInfoCompat refreshFromChild(
        AccessibilityNodeInfoCompat node) {
    if (node.getChildCount() > 0) {
        AccessibilityNodeInfoCompat firstChild = node.getChild(0);
        if (firstChild != null) {
            AccessibilityNodeInfoCompat parent = firstChild.getParent();
            firstChild.recycle();
            if (node.equals(parent)) {
                return parent;
            } else {
                recycleNodes(parent);
            }
        }
    }
    return null;
}
 

@Override
public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfoCompat info) {
    final AccessibilityNodeInfoCompat superNode = AccessibilityNodeInfoCompat.obtain(info);
    super.onInitializeAccessibilityNodeInfo(host, superNode);

    info.setSource(host);
    final ViewParent parent = ViewCompat.getParentForAccessibility(host);
    if (parent instanceof View) {
        info.setParent((View) parent);
    }
    copyNodeInfoNoChildren(info, superNode);

    superNode.recycle();

    addChildrenForAccessibility(info, (ViewGroup) host);
}
 

public void onInitializeAccessibilityNodeInfo(View view, AccessibilityNodeInfoCompat accessibilitynodeinfocompat)
{
    AccessibilityNodeInfoCompat accessibilitynodeinfocompat1 = AccessibilityNodeInfoCompat.obtain(accessibilitynodeinfocompat);
    super.onInitializeAccessibilityNodeInfo(view, accessibilitynodeinfocompat1);
    a(accessibilitynodeinfocompat, accessibilitynodeinfocompat1);
    accessibilitynodeinfocompat1.recycle();
    accessibilitynodeinfocompat.setClassName(android/support/v4/widget/SlidingPaneLayout.getName());
    accessibilitynodeinfocompat.setSource(view);
    android.view.ViewParent viewparent = ViewCompat.getParentForAccessibility(view);
    if (viewparent instanceof View)
    {
        accessibilitynodeinfocompat.setParent((View)viewparent);
    }
    int i = b.getChildCount();
    for (int j = 0; j < i; j++)
    {
        View view1 = b.getChildAt(j);
        if (!a(view1) && view1.getVisibility() == 0)
        {
            ViewCompat.setImportantForAccessibility(view1, 1);
            accessibilitynodeinfocompat.addChild(view1);
        }
    }

}
 

@Override
public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfoCompat info) {
    final AccessibilityNodeInfoCompat superNode = AccessibilityNodeInfoCompat.obtain(info);
    super.onInitializeAccessibilityNodeInfo(host, superNode);

    info.setClassName(DrawerLayout.class.getName());
    info.setSource(host);
    final ViewParent parent = ViewCompat.getParentForAccessibility(host);
    if (parent instanceof View) {
        info.setParent((View) parent);
    }
    copyNodeInfoNoChildren(info, superNode);

    superNode.recycle();

    addChildrenForAccessibility(info, (ViewGroup) host);
}
 

/**
 * Logs the tree using the input node as the root.
 */
public static void logNodeTree(AccessibilityNodeInfoCompat node) {
    if (node == null) {
        return;
    }

    HashSet<AccessibilityNodeInfoCompat> seen = new HashSet<AccessibilityNodeInfoCompat>();
    logNodeTree(AccessibilityNodeInfoCompat.obtain(node), "", seen);
    for (AccessibilityNodeInfoCompat n : seen) {
        n.recycle();
    }
}
 

@Override
public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfoCompat info) {
    final AccessibilityNodeInfoCompat superNode = AccessibilityNodeInfoCompat.obtain(info);
    super.onInitializeAccessibilityNodeInfo(host, superNode);
    copyNodeInfoNoChildren(info, superNode);
    superNode.recycle();

    info.setClassName(SwipeBackLayout.class.getName());
    info.setSource(host);

    final ViewParent parent = ViewCompat.getParentForAccessibility(host);
    if (parent instanceof View) {
        info.setParent((View) parent);
    }

    // This is a best-approximation of addChildrenForAccessibility()
    // that accounts for filtering.
    final int childCount = getChildCount();
    for (int i = 0; i < childCount; i++) {
        final View child = getChildAt(i);
        if (!filter(child) && (child.getVisibility() == View.VISIBLE)) {
            // Force importance to "yes" since we can't read the value.
            ViewCompat.setImportantForAccessibility(
                    child, ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_YES);
            info.addChild(child);
        }
    }
}
 

/**
 * Determines whether or not the given node contains native web content (and not ChromeVox).
 *
 * @param node The node to evaluate
 * @return {@code true} if the node contains native web content, {@code false} otherwise
 */
public static boolean hasNativeWebContent(AccessibilityNodeInfoCompat node) {
    if (node == null) {
        return false;
    }

    if (!supportsWebActions(node)) {
        return false;
    }

    // ChromeVox does not have sub elements, so if the parent element also has web content
    // this cannot be ChromeVox.
    AccessibilityNodeInfoCompat parent = node.getParent();
    if (supportsWebActions(parent)) {
        if (parent != null) {
            parent.recycle();
        }
        return true;
    }

    if (parent != null) {
        parent.recycle();
    }

    // ChromeVox never has child elements
    return node.getChildCount() > 0;
}
 

/**
 * Recycles objects owned by the spannable.  In particular, any
 * accessibility nodes that have been associated with {@code spannable}
 * are recycled and removed.
 */
public static void recycleSpans(CharSequence chars) {
    if (!(chars instanceof Spannable)) {
        return;
    }
    Spannable spannable = (Spannable) chars;
    AccessibilityNodeInfoCompat[] nodes = spannable.getSpans(
        0, spannable.length(), AccessibilityNodeInfoCompat.class);
    for (AccessibilityNodeInfoCompat node : nodes) {
        node.recycle();
        spannable.removeSpan(node);
    }
}
 

@Override
public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfoCompat info) {
    final AccessibilityNodeInfoCompat superNode = AccessibilityNodeInfoCompat.obtain(info);
    super.onInitializeAccessibilityNodeInfo(host, superNode);
    copyNodeInfoNoChildren(info, superNode);
    superNode.recycle();

    info.setClassName(SlidingPaneLayout.class.getName());
    info.setSource(host);

    final ViewParent parent = ViewCompat.getParentForAccessibility(host);
    if (parent instanceof View) {
        info.setParent((View) parent);
    }

    // This is a best-approximation of addChildrenForAccessibility()
    // that accounts for filtering.
    final int childCount = getChildCount();
    for (int i = 0; i < childCount; i++) {
        final View child = getChildAt(i);
        if (!filter(child) && (child.getVisibility() == View.VISIBLE)) {
            // Force importance to "yes" since we can't read the value.
            ViewCompat.setImportantForAccessibility(
                    child, ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_YES);
            info.addChild(child);
        }
    }
}
 

@Override
public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfoCompat info) {
    final AccessibilityNodeInfoCompat superNode = AccessibilityNodeInfoCompat.obtain(info);
    super.onInitializeAccessibilityNodeInfo(host, superNode);
    copyNodeInfoNoChildren(info, superNode);
    superNode.recycle();

    info.setClassName(SlidingPaneLayout.class.getName());
    info.setSource(host);

    final ViewParent parent = ViewCompat.getParentForAccessibility(host);
    if (parent instanceof View) {
        info.setParent((View) parent);
    }

    // This is a best-approximation of addChildrenForAccessibility()
    // that accounts for filtering.
    final int childCount = getChildCount();
    for (int i = 0; i < childCount; i++) {
        final View child = getChildAt(i);
        if (!filter(child) && (child.getVisibility() == View.VISIBLE)) {
            // Force importance to "yes" since we can't read the value.
            ViewCompat.setImportantForAccessibility(
                    child, ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_YES);
            info.addChild(child);
        }
    }
}
 

@Override
public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfoCompat info) {
    if (CAN_HIDE_DESCENDANTS) {
        super.onInitializeAccessibilityNodeInfo(host, info);
    } else {
        // Obtain a node for the host, then manually generate the list
        // of children to only include non-obscured views.
        final AccessibilityNodeInfoCompat superNode =
                AccessibilityNodeInfoCompat.obtain(info);
        super.onInitializeAccessibilityNodeInfo(host, superNode);

        info.setSource(host);
        final ViewParent parent = ViewCompat.getParentForAccessibility(host);
        if (parent instanceof View) {
            info.setParent((View) parent);
        }
        copyNodeInfoNoChildren(info, superNode);
        superNode.recycle();

        addChildrenForAccessibility(info, (ViewGroup) host);
    }

    info.setClassName(DrawerLayout.class.getName());

    // This view reports itself as focusable so that it can intercept
    // the back button, but we should prevent this view from reporting
    // itself as focusable to accessibility services.
    info.setFocusable(false);
    info.setFocused(false);
    info.removeAction(AccessibilityActionCompat.ACTION_FOCUS);
    info.removeAction(AccessibilityActionCompat.ACTION_CLEAR_FOCUS);
}
 

/**
 * Syncs accessibility focus back to the node focused when search mode
 * first activated.
 */
private void syncBackToInitial() {
    AccessibilityNodeInfoCompat focused = FocusFinder.getFocusedNode(
                    mAccessibilityService, false);
    if (focused == null) {
        return;
    }
    try {
        mInitialNode.reset(AccessibilityNodeInfoUtils.refreshNode(
                    mInitialNode.get()));
        if (!AccessibilityNodeInfoRef.isNull(mInitialNode)) {
            if (mInitialNode.get().isAccessibilityFocused()) {
                return;
            }
            mFeedbackManager.emitOnFailure(
                mInitialNode.get().performAction(
                    AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS),
                    FeedbackManager.TYPE_COMMAND_FAILED);
        } else {
            mFeedbackManager.emitOnFailure(
                focused.performAction(AccessibilityNodeInfoCompat.
                        ACTION_CLEAR_ACCESSIBILITY_FOCUS),
                FeedbackManager.TYPE_COMMAND_FAILED);
        }
    } finally {
        focused.recycle();
    }
}
 

@Override
public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfoCompat info) {
    final AccessibilityNodeInfoCompat superNode = AccessibilityNodeInfoCompat.obtain(info);
    super.onInitializeAccessibilityNodeInfo(host, superNode);
    copyNodeInfoNoChildren(info, superNode);
    superNode.recycle();

    info.setClassName(SlidingPaneLayout.class.getName());
    info.setSource(host);

    final ViewParent parent = ViewCompat.getParentForAccessibility(host);
    if (parent instanceof View) {
        info.setParent((View) parent);
    }

    // This is a best-approximation of addChildrenForAccessibility()
    // that accounts for filtering.
    final int childCount = getChildCount();
    for (int i = 0; i < childCount; i++) {
        final View child = getChildAt(i);
        if (!filter(child) && (child.getVisibility() == View.VISIBLE)) {
            // Force importance to "yes" since we can't read the value.
            ViewCompat.setImportantForAccessibility(
                    child, ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_YES);
            info.addChild(child);
        }
    }
}
 

private static AccessibilityNodeInfoCompat
      findFirstFocusableDescendantInternal(
              AccessibilityNodeInfoCompat root, Context context,
              HashSet<AccessibilityNodeInfoCompat> seenNodes) {
    for (int i = 0, end = root.getChildCount(); i < end; ++i) {
        AccessibilityNodeInfoCompat child = root.getChild(i);
        if (child == null) {
            continue;
        }
        if (AccessibilityNodeInfoUtils.shouldFocusNode(
                        context, child)) {
            return child;
        }
        if (!seenNodes.add(child)) {
            LogUtils.log(FocusFinder.class, Log.ERROR,
                    "Cycle in node tree");
            child.recycle();
            return null;
        }
        AccessibilityNodeInfoCompat n =
                findFirstFocusableDescendantInternal(
                        child, context, seenNodes);
        if (n != null) {
            return n;
        }
    }
    return null;
}
 

/**
 * Determines if the supplied {@link View} and {@link AccessibilityNodeInfoCompat} has any
 * children which are not independently accessibility focusable and also have a spoken
 * description.
 * <p>
 * NOTE: Accessibility services will include these children's descriptions in the closest
 * focusable ancestor.
 *
 * @param view The {@link View} to evaluate
 * @param node The {@link AccessibilityNodeInfoCompat} to evaluate
 * @return {@code true} if it has any non-actionable speaking descendants within its subtree
 */
public static boolean hasNonActionableSpeakingDescendants(
    @Nullable AccessibilityNodeInfoCompat node,
    @Nullable View view) {

  if (node == null || view == null || !(view instanceof ViewGroup)) {
    return false;
  }

  ViewGroup viewGroup = (ViewGroup) view;
  for (int i = 0, count = viewGroup.getChildCount(); i < count; i++) {
    View childView = viewGroup.getChildAt(i);

    if (childView == null) {
      continue;
    }

    AccessibilityNodeInfoCompat childNode = AccessibilityNodeInfoCompat.obtain();
    try {
      ViewCompat.onInitializeAccessibilityNodeInfo(childView, childNode);

      if (isAccessibilityFocusable(childNode, childView)) {
        continue;
      }

      if (isSpeakingNode(childNode, childView)) {
        return true;
      }
    } finally {
      childNode.recycle();
    }
  }

  return false;
}
 

@Nullable
public static CharSequence getDescription(View view) {
  AccessibilityNodeInfoCompat node = createNodeInfoFromView(view);
  try {
    CharSequence contentDescription = node.getContentDescription();
    CharSequence nodeText = node.getText();

    boolean hasNodeText = !TextUtils.isEmpty(nodeText);
    boolean isEditText = view instanceof EditText;

    // EditText's prioritize their own text content over a contentDescription
    if (!TextUtils.isEmpty(contentDescription) && (!isEditText || !hasNodeText)) {
      return contentDescription;
    }

    if (hasNodeText) {
      return nodeText;
    }

    // If there are child views and no contentDescription the text of all non-focusable children,
    // comma separated, becomes the description.
    if (view instanceof ViewGroup) {
      final StringBuilder concatChildDescription = new StringBuilder();
      final String separator = ", ";
      ViewGroup viewGroup = (ViewGroup) view;

      for (int i = 0, count = viewGroup.getChildCount(); i < count; i++) {
        final View child = viewGroup.getChildAt(i);

        AccessibilityNodeInfoCompat childNodeInfo = AccessibilityNodeInfoCompat.obtain();
        ViewCompat.onInitializeAccessibilityNodeInfo(child, childNodeInfo);

        CharSequence childNodeDescription = null;
        if (AccessibilityUtil.isSpeakingNode(childNodeInfo, child) &&
            !AccessibilityUtil.isAccessibilityFocusable(childNodeInfo, child)) {
          childNodeDescription = getDescription(child);
        }

        if (!TextUtils.isEmpty(childNodeDescription)) {
          if (concatChildDescription.length() > 0) {
            concatChildDescription.append(separator);
          }
          concatChildDescription.append(childNodeDescription);
        }
        childNodeInfo.recycle();
      }

      return concatChildDescription.length() > 0 ? concatChildDescription.toString() : null;
    }

    return null;
  } finally {
    node.recycle();
  }
}
 

public static boolean getIgnored(View view) {
  int important = ViewCompat.getImportantForAccessibility(view);
  if (important == ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_NO ||
      important == ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS) {
    return true;
  }

  // Go all the way up the tree to make sure no parent has hidden its descendants
  ViewParent parent = view.getParent();
  while (parent instanceof View) {
    if (ViewCompat.getImportantForAccessibility((View) parent)
        == ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS) {
      return true;
    }
    parent = parent.getParent();
  }

  AccessibilityNodeInfoCompat node = createNodeInfoFromView(view);
  try {
    if (!node.isVisibleToUser()) {
      return true;
    }

    if (AccessibilityUtil.isAccessibilityFocusable(node, view)) {
      if (node.getChildCount() <= 0) {
        // Leaves that are accessibility focusable are never ignored, even if they don't have a
        // speakable description
        return false;
      } else if (AccessibilityUtil.isSpeakingNode(node, view)) {
        // Node is focusable and has something to speak
        return false;
      }

      // Node is focusable and has nothing to speak
      return true;
    }

    // If this node has no focusable ancestors, but it still has text,
    // then it should receive focus from navigation and be read aloud.
    if (!AccessibilityUtil.hasFocusableAncestor(node, view) && AccessibilityUtil.hasText(node)) {
      return false;
    }

    return true;
  } finally {
    node.recycle();
  }
}
 

@Nullable
public static String getActions(View view) {
  AccessibilityNodeInfoCompat node = createNodeInfoFromView(view);
  try {
    final StringBuilder actionLabels = new StringBuilder();
    final String separator = ", ";

    for (AccessibilityActionCompat action : node.getActionList()) {
      if (actionLabels.length() > 0) {
        actionLabels.append(separator);
      }
      switch (action.getId()) {
        case AccessibilityNodeInfoCompat.ACTION_FOCUS:
          actionLabels.append("focus");
          break;
        case AccessibilityNodeInfoCompat.ACTION_CLEAR_FOCUS:
          actionLabels.append("clear-focus");
          break;
        case AccessibilityNodeInfoCompat.ACTION_SELECT:
          actionLabels.append("select");
          break;
        case AccessibilityNodeInfoCompat.ACTION_CLEAR_SELECTION:
          actionLabels.append("clear-selection");
          break;
        case AccessibilityNodeInfoCompat.ACTION_CLICK:
          actionLabels.append("click");
          break;
        case AccessibilityNodeInfoCompat.ACTION_LONG_CLICK:
          actionLabels.append("long-click");
          break;
        case AccessibilityNodeInfoCompat.ACTION_ACCESSIBILITY_FOCUS:
          actionLabels.append("accessibility-focus");
          break;
        case AccessibilityNodeInfoCompat.ACTION_CLEAR_ACCESSIBILITY_FOCUS:
          actionLabels.append("clear-accessibility-focus");
          break;
        case AccessibilityNodeInfoCompat.ACTION_NEXT_AT_MOVEMENT_GRANULARITY:
          actionLabels.append("next-at-movement-granularity");
          break;
        case AccessibilityNodeInfoCompat.ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY:
          actionLabels.append("previous-at-movement-granularity");
          break;
        case AccessibilityNodeInfoCompat.ACTION_NEXT_HTML_ELEMENT:
          actionLabels.append("next-html-element");
          break;
        case AccessibilityNodeInfoCompat.ACTION_PREVIOUS_HTML_ELEMENT:
          actionLabels.append("previous-html-element");
          break;
        case AccessibilityNodeInfoCompat.ACTION_SCROLL_FORWARD:
          actionLabels.append("scroll-forward");
          break;
        case AccessibilityNodeInfoCompat.ACTION_SCROLL_BACKWARD:
          actionLabels.append("scroll-backward");
          break;
        case AccessibilityNodeInfoCompat.ACTION_CUT:
          actionLabels.append("cut");
          break;
        case AccessibilityNodeInfoCompat.ACTION_COPY:
          actionLabels.append("copy");
          break;
        case AccessibilityNodeInfoCompat.ACTION_PASTE:
          actionLabels.append("paste");
          break;
        case AccessibilityNodeInfoCompat.ACTION_SET_SELECTION:
          actionLabels.append("set-selection");
          break;
        default:
          CharSequence label = action.getLabel();
          if (label != null) {
            actionLabels.append(label);
          } else {
            actionLabels.append("unknown");
          }
          break;
      }
    }

    return actionLabels.length() > 0 ? actionLabels.toString() : null;
  } finally {
    node.recycle();
  }
}