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我previously asked这个问题,但没有再访问该帐户也没有得到恢复的帐户的能力。如果主持人正在查看此内容,请删除我之前的问题。
问:
我使用AndroidTreeView library创建消息(基本上是嵌套式布局)的一个TreeView。
在我的代码,我有一个JSON响应,看起来是这样的:
[
{
"id": 2,
"user_id": 1,
"message": "Hello",
"children": [
{
"id": 3,
"user_id": 2,
"message": "Hi",
"children": [
{
"id": 5,
"user_id": 3,
"message": "Hey",
"children": [
]
}
]
},
{
"id": 6,
"user_id": 2,
"message": "Bye",
"children": [
]
}
]
},
{
"id": 4,
"user_id": 2,
"message": "Heya",
"children": [
]
}
]
正如你所看到的,数据可以被嵌套,并可以在每个消息在多个孩子。每个对象(包括儿童)是类Message.java(该GSON模型类),其中包含以下内容:
public class Message implements Serializable {
@SerializedName("id")
@Expose
private Integer id;
@SerializedName("user_id")
@Expose
private Integer userId;
@SerializedName("message")
@Expose
private String message;
@SerializedName("children")
@Expose
private List<Message> children = null;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public Integer getUserId() {
return userId;
}
public void setUserId(Integer userId) {
this.userId = userId;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public List<Message> getChildren() {
return children;
}
public void setChildren(List<Message> children) {
this.children = children;
}
}
为了构建树,这里是我的代码到目前为止(在MainActivity.java):
private List<Message> messages = response.body(); // the JSON response
private TreeNode root = TreeNode.root();
for (Message message : messages) {
MessageAdapter.TreeItem messageItem = new MessageAdapter.TreeItem(message);
TreeNode parentNode = new TreeNode(messageItem).setViewHolder(new MessageAdapter(MainActivity.this));
root.addChild(parentNode);
}
LinearLayout messageContainer = (LinearLayout) findViewById(R.id.messageContainer);
AndroidTreeView tView = new AndroidTreeView(MainActivity.this, root);
messageContainer.addView(tView.getView());
And here is the MessageAdapter.java:
public class MessageAdapter extends TreeNode.BaseNodeViewHolder<MessageAdapter.TreeItem> {
private Context context;
private TextView messageTextView;
public MessageAdapter(Context context) {
super(context);
this.context = context;
}
@Override
public View createNodeView(TreeNode node, TreeItem value) {
final LayoutInflater inflater = LayoutInflater.from(context);
final View view = inflater.inflate(R.layout.message_layout, null, false);
Message message = value.message;
messageTextView = (TextView) view.findViewById(R.id.messageTextView);
messageTextView.setText(message.getMessage());
return view;
}
public static class TreeItem {
public Message message;
public TreeItem(Message message) {
this.message = message;
}
}
}
我的代码的问题是,它只输出“你好”和“部屋”(这两个最上面的消息):
- Hello
- Heya
相反,它应该是输出:
- Hello
- Hi
- Hey
- Bye
- Heya
如何更改我的代码以遍历所有嵌套的子消息,并将它们正确添加到每个节点?
仅供参考,这是一个子节点是如何加入到父节点(从库自述拍摄):
TreeNode parent = new TreeNode("MyParentNode");
TreeNode child0 = new TreeNode("ChildNode0");
TreeNode child1 = new TreeNode("ChildNode1");
parent.addChildren(child0, child1);
root.addChild(parent);
我宁愿使用'List'因为我在代码中的其他地方引用它。 –
user7555980