Sample showing off XML Tree UI and XML parsing in Codename One

XMLTreeSample.java

class XMLTreeModel implements TreeModel {
    private Element root;
    public XMLTreeModel(Element e) {
        root = e;
    }

    public Vector getChildren(Object parent) {
        if(parent == null) {
            Vector c = new Vector();
            c.addElement(root);
            return c;
        }
        Vector result = new Vector();
        Element e = (Element)parent;
        for(int iter = 0 ; iter < e.getNumChildren() ; iter++) {
            result.addElement(e.getChildAt(iter));
        }
        return result;
    }

    public boolean isLeaf(Object node) {
        Element e = (Element)node;
        return e.getNumChildren() == 0;
    }
}

Form hi = new Form("XML Tree", new BorderLayout());
InputStream is = Display.getInstance().getResourceAsStream(getClass(), "/build.xml");
try(Reader r = new InputStreamReader(is, "UTF-8")) {
    Element e = new XMLParser().parse(r);
    Tree xmlTree = new Tree(new XMLTreeModel(e)) {
        @Override
        protected String childToDisplayLabel(Object child) {
            if(child instanceof Element) {
                return ((Element)child).getTagName();
            }
            return child.toString();
        }
    };
    hi.add(BorderLayout.CENTER, xmlTree);
} catch(IOException err) {
    Log.e(err);
}

Sample usage code for Tree, TreeModel & XMLParser.

From the Codename One project