Java Code Examples for androidx.core.view.accessibility.AccessibilityNodeInfoCompat#getWindowId()

public void updateStateFromEvent(AccessibilityEvent event) {
  switch (event.getEventType()) {
    case AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED:
      {
        final AccessibilityRecordCompat record = AccessibilityEventCompat.asRecord(event);
        final AccessibilityNodeInfoCompat sourceNode = record.getSource();

        // Transition the collection state if necessary.
        mCollectionState.updateCollectionInformation(sourceNode, event);
        if (sourceNode != null) {
          final AccessibilityNodeInfoCompat scrollableNode =
              AccessibilityNodeInfoUtils.getSelfOrMatchingAncestor(
                  sourceNode, AccessibilityNodeInfoUtils.FILTER_SCROLLABLE);
          mIsLastFocusInScrollableNode = mIsCurrentFocusInScrollableNode;
          mIsCurrentFocusInScrollableNode = (scrollableNode != null);
          if (scrollableNode != null) {
            scrollableNode.recycle();
          }

          TraversalStrategy traversalStrategy = new SimpleTraversalStrategy();
          // TODO: TraversalStrategyUtils.isEdgeListItem() doesn't include Role check in
          // AccessibilityNodeInfoUtils.FILTER_AUTO_SCROLL. Shall we use
          // TraversalStrategyUtils.isAutoScrollEdgeListItem() instead?
          mIsFocusEdgeListItem =
              TraversalStrategyUtils.isEdgeListItem(sourceNode, traversalStrategy);
          traversalStrategy.recycle();

          mLastWindowId = mCurrentWindowId;
          mCurrentWindowId = sourceNode.getWindowId();
          sourceNode.recycle();
        }
      }
      break;
    default: // fall out
  }
}
 

/**
 * Registers the action information. Called immediately after an accessibility focus action is
 * performed.
 *
 * <p><strong>Note:</strong> Caller is responsible for recycling the {@code node}.
 *
 * @param node Node being accessibility focused.
 * @param extraData Extra information of the action.
 * @param actionTime {@link SystemClock#uptimeMillis()} right before performing focus action.
 * @param currentScreenState Current {@link ScreenState}.
 */
public void onAccessibilityFocusAction(
    AccessibilityNodeInfoCompat node,
    FocusActionInfo extraData,
    long actionTime,
    @Nullable ScreenState currentScreenState) {
  // FocusActionRecord handles making a copy of 'node'. We don't nee to call obtain() here.
  FocusActionRecord record = new FocusActionRecord(node, extraData, actionTime);

  // Add to the record queue.
  focusActionRecordList.offer(record);
  if (focusActionRecordList.size() > MAXIMUM_RECORD_QUEUE_SIZE) {
    // Poll and recycle the eldest order if the queue grows up its maximum size.
    focusActionRecordList.pollFirst().recycle();
  }

  final int windowId = node.getWindowId();
  final CharSequence windowTitle =
      (currentScreenState == null) ? null : currentScreenState.getWindowTitle(windowId);
  // Add to the window record map.
  windowIdTitlePairToFocusActionRecordMap.put(
      Pair.create(windowId, windowTitle), FocusActionRecord.copy(record));

  // Update the last editable node focus action.
  if (node.isEditable() || (Role.getRole(node) == Role.ROLE_EDIT_TEXT)) {
    if (lastEditableFocusActionRecord != null) {
      lastEditableFocusActionRecord.recycle();
    }
    lastEditableFocusActionRecord = FocusActionRecord.copy(record);
  }
}
 

private boolean hasValidAccessibilityFocusInWindow(AccessibilityWindowInfo window) {
  AccessibilityNodeInfoCompat currentFocus = null;
  try {
    currentFocus =
        accessibilityFocusMonitor.getAccessibilityFocus(/* useInputFocusIfEmpty= */ false);
    return (currentFocus != null)
        && AccessibilityNodeInfoUtils.isVisible(currentFocus)
        && (currentFocus.getWindowId() == window.getId());
  } finally {
    AccessibilityNodeInfoUtils.recycleNodes(currentFocus);
  }
}
 

/** Stores information about completed input-focus action. Caller must recycle node. */
public void setInputFocus(AccessibilityNodeInfoCompat node) {
  long currentTime = SystemClock.uptimeMillis();
  lastWindowId = node.getWindowId();
  lastWindowIdUptimeMs = currentTime;
  if (inputFocusActionRecord != null) {
    AccessibilityNodeInfoUtils.recycleNodes(inputFocusActionRecord.inputFocusedNode);
  }
  inputFocusActionRecord =
      new InputFocusActionRecord(AccessibilityNodeInfoUtils.obtain(node), currentTime);
}