2
我previously asked這個問題,但沒有再訪問該帳戶也沒有得到恢復的帳戶的能力。如果主持人正在查看此內容,請刪除我之前的問題。
問:
我使用AndroidTreeView library創建消息(基本上是嵌套式佈局)的一個TreeView。
在我的代碼,我有一個JSON響應,看起來是這樣的:
[
{
"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,數據可以被嵌套,並可以在每個消息在多個孩子。每個對象(包括兒童)是類Message.java(該GSON模型類),其中包含以下內容:
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;
}
}
爲了構建樹,這裏是我的代碼到目前爲止(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;
}
}
}
我的代碼的問題是,它只輸出「你好」和「部屋」(這兩個最上面的消息):
- Hello
- Heya
相反,它應該是輸出:
- Hello
- Hi
- Hey
- Bye
- Heya
如何更改我的代碼以遍歷所有嵌套的子消息,並將它們正確添加到每個節點?
僅供參考,這是一個子節點是如何加入到父節點(從庫自述拍攝):
TreeNode parent = new TreeNode("MyParentNode");
TreeNode child0 = new TreeNode("ChildNode0");
TreeNode child1 = new TreeNode("ChildNode1");
parent.addChildren(child0, child1);
root.addChild(parent);
我寧願使用'List'因爲我在代碼中的其他地方引用它。 –
user7555980