uiautomatorviewer - What does NAF stand for?

Question

Its my understanding that UIAutomator is unable to automate any elements where NAF = true in uiautomatorviewer. Ive searched high and low but i cant for the life of me find what NAF stands for. Does anyone know?

Answer 1

"Not Accessibility Friendly"

These are UI elements which are apparently interactive, but which don't have accessibility affordances like content descriptions.

From the source for AccessibilityNodeInfoDumper.java (part of uiautomator):

/**
 * We're looking for UI controls that are enabled, clickable but have no
 * text nor content-description. Such controls configuration indicate an
 * interactive control is present in the UI and is most likely not
 * accessibility friendly. We refer to such controls here as NAF controls
 * (Not Accessibility Friendly)
 *
 * @param node
 * @return false if a node fails the check, true if all is OK
 */
private static boolean nafCheck(AccessibilityNodeInfo node) {
    boolean isNaf = node.isClickable() && node.isEnabled()
            && safeCharSeqToString(node.getContentDescription()).isEmpty()
            && safeCharSeqToString(node.getText()).isEmpty();
    if (!isNaf)
        return true;
    // check children since sometimes the containing element is clickable
    // and NAF but a child's text or description is available. Will assume
    // such layout as fine.
    return childNafCheck(node);
}