Java me 在lwuit中为树状视图动态创建节点
我想创建一个动态节点,上面是静态节点的示例代码 plz帮助查看UIDemo应用程序中的类。这里动态地从文件根中检索值,并将该值添加到向量中。请参见TreeDemo类中的FileTreeModel内部类。您可以按照同样的方法添加动态值 这可能有助于-Java me 在lwuit中为树状视图动态创建节点,java-me,lwuit,treemodel,Java Me,Lwuit,Treemodel,我想创建一个动态节点,上面是静态节点的示例代码 plz帮助查看UIDemo应用程序中的类。这里动态地从文件根中检索值,并将该值添加到向量中。请参见TreeDemo类中的FileTreeModel内部类。您可以按照同样的方法添加动态值 这可能有助于- TreeModel model = new TreeModel() { Node[] sillyTree = { new Node("X", new Node[] { new Node("Child
TreeModel model = new TreeModel() {
Node[] sillyTree = {
new Node("X", new Node[] {
new Node("Child 1", new Node[] {
}),
new Node("Child 2", new Node[] {
}),
new Node("Child 3", new Node[] {
}),
}),
new Node("Y", new Node[] {
new Node("A", new Node[] {
})
}),
new Node("Z", new Node[] {
new Node("A", new Node[] {
}),
}),
};
及-
class Node {
Vector children;
String value; // Name of the node….
public Node(String value, Vector children) {
this.children = children;
this.value = value;
}
public String toString() {
return value;
}
}
Node[]noderray=generateRootNode();
TreeModel模型=新的TreeModel(){
节点[]sillyTree=nodeArray;
公共向量getChildren(对象父对象){
节点n=(节点)父节点;
Object[]节点=null;
向量v=新向量();
如果(父项==null){
节点=sillyTree;
}否则{
v=n.儿童;
}
如果(节点!=null){
对于(int-iter=0;iter
。我尝试使用这个示例,但无法运行,我只得到了空指针异常检查出Lwuit repos并查看UIDemo应用程序。回购链接,
Node[] nodeArray = generateRootNode();
TreeModel model = new TreeModel() {
Node[] sillyTree = nodeArray;
public Vector getChildren(Object parent) {
Node n = (Node) parent;
Object[] nodes = null;
Vector v = new Vector();
if (parent == null) {
nodes = sillyTree;
} else {
v = n.children;
}
if (nodes != null) {
for (int iter = 0; iter < nodes.length; iter++) {
v.addElement(nodes[iter]);
}
}
return v;
}
public boolean isLeaf(Object node) {
boolean returnValue = false;
try {
Node n = (Node) node;
returnValue = n.children == null || n.children.size() == 0;
} catch (ClassCastException ex) {
// It means its a child node or a leaf...
returnValue = true;
}
return returnValue;
}
};