如何从AccessibilityNodeInfo中的所有子节点获取文本

Question

I'm trying to read the text from all the child nodes of an AccessiblityNodeInfo.

I tried getting AccessiblityNodeInfo.getParent() and AccessibilityNodeInfo.getChildCount()

for(int i=0; i<accessibilityNodeInfo.getChildCount();i++){
accessibilityNodeInfo.getChild(i).getText();
}

Accessed the child nodes as mentioned above to get the text from the child nodes. but it is not providing the all the text on the screen.

Can anyone suggest me what to do get the text?

Answer 1

private List<CharSequence> getAllChildNodeText(AccessibilityNodeInfoCompat infoCompat) {
    List<CharSequence> contents = new ArrayList<>();
    if (infoCompat == null)
        return contents;
    if (infoCompat.getContentDescription() != null) {
        contents.add(infoCompat.getContentDescription().toString().isEmpty() ? "unlabelled" : infoCompat.getContentDescription());
    } else if (infoCompat.getText() != null) {
        contents.add(infoCompat.getText().toString().isEmpty() ? "unlabelled" : infoCompat.getText());
    } else {
        getTextInChildren(infoCompat, contents);
    }
    if (infoCompat.isClickable()) {
        if (infoCompat.getClassName().toString().contains(Button.class.getSimpleName())) {
            if (contents.size() == 0) {
                contents.add("Unlabelled button");
            } else {
                contents.add("button");
            }
        }
        contents.add("Double tap to activate");
    }
    return contents;
}


private void getTextInChildren(AccessibilityNodeInfoCompat nodeInfoCompat, List<CharSequence> contents) {
    if (nodeInfoCompat == null)
        return;
    if (!nodeInfoCompat.isScrollable()) {
        if (nodeInfoCompat.getContentDescription() != null) {
            contents.add(nodeInfoCompat.getContentDescription());
        } else if (nodeInfoCompat.getText() != null) {
            contents.add(nodeInfoCompat.getText());
        }
        if (nodeInfoCompat.getChildCount() > 0) {
            for (int i = 0; i < nodeInfoCompat.getChildCount(); i++) {
                if (nodeInfoCompat.getChild(i) != null) {
                    getTextInChildren(nodeInfoCompat.getChild(i), contents);
                }
            }
        }
    }
}