uiautomatorviewer - 什么NAF代表不？

Question

它我的理解是UIAutomator无法自动那里NAF在uiautomatorviewer =真任何元素。香港专业教育学院搜查高和低，但我不能为我的生活中找到什么NAF代表。有人知道吗？

Answer 1

“不友善无障碍”

这些都是显然是互动的，但它不具有可访问性启示像内容描述UI元素。

从源AccessibilityNodeInfoDumper.java（uiautomator的一部分）：

/**
 * 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);
}

Answer 2

NAF表示“不友善无障碍”。