diff --git a/README.md b/README.md
index 13f5b0f..a58e333 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ allprojects {
 }
 
 dependencies {
-	compile 'com.github.pye52:TreeView:0.2.2'
+	compile 'com.github.pye52:TreeView:0.2.3'
 }
 ```
 
@@ -86,8 +86,10 @@ Type type = new TypeToken<List<User>>(){}.getType();
 List<User> list = new Gson().fromJson(testStr, type);
 // TreeAdapter<User> adapter = new TreeAdapter<>(this, list);
 TreeAdapter<User> adapter = new TreeAdapter<>(this);
-// 若不在初始化时指定数据，则会等到执行setNodes时才会有数据
+// 若不在初始化时指定数据，则需要手动调用notifyDataSetChanged来刷新列表
 adapter.setNodes(list);
+adapter.notifyDataSetChanged();
+
 recyclerview.setAdapter(adapter);
 
  final List<User> C1Childs = new ArrayList<>();
diff --git a/app/src/main/java/com/kanade/treeview/MainActivity.java b/app/src/main/java/com/kanade/treeview/MainActivity.java
index cb656ff..d8f2712 100644
--- a/app/src/main/java/com/kanade/treeview/MainActivity.java
+++ b/app/src/main/java/com/kanade/treeview/MainActivity.java
@@ -82,21 +82,21 @@ protected void onCreate(Bundle savedInstanceState) {
 
         Type type = new TypeToken<List<User>>(){}.getType();
         list = new Gson().fromJson(testStr, type);
-        rv = (RecyclerView) findViewById(R.id.rv);
+        rv = findViewById(R.id.rv);
         rv.setLayoutManager(new LinearLayoutManager(this));
         final TreeAdapter<User> adapter = new TreeAdapter<>(this);
 
-        final List<User> C1Childs = new ArrayList<>();
-        C1Childs.add(new User(11, 3, "C11"));
-        C1Childs.add(new User(12, 3, "C12"));
-        C1Childs.add(new User(13, 3, "C13"));
+        final List<User> childs = new ArrayList<>();
+        childs.add(new User(11, 3, "C11"));
+        childs.add(new User(12, 3, "C12"));
+        childs.add(new User(13, 3, "C13"));
 
         adapter.setNodes(list);
         adapter.setListener(new TreeItemClickListener() {
             @Override
             public void OnClick(Node node) {
                 if (node.getId() == 3) {
-                    adapter.addChildrenById(3, C1Childs);
+                    adapter.addChildrenById(3, childs);
                 }
                 Toast.makeText(MainActivity.this, node.getName(), Toast.LENGTH_SHORT).show();
             }
diff --git a/app/src/main/java/com/kanade/treeview/User.java b/app/src/main/java/com/kanade/treeview/User.java
index 8eb116b..d7ec7b4 100644
--- a/app/src/main/java/com/kanade/treeview/User.java
+++ b/app/src/main/java/com/kanade/treeview/User.java
@@ -17,7 +17,7 @@ public User(long id, long pid, String title) {
     }
 
     @Override
-    public long getId() {
+    public long getNid() {
         return id;
     }
 
diff --git a/treeadapter/build.gradle b/treeadapter/build.gradle
index f201e53..f4d59c7 100644
--- a/treeadapter/build.gradle
+++ b/treeadapter/build.gradle
@@ -8,7 +8,7 @@ android {
         minSdkVersion 16
         targetSdkVersion 26
         versionCode 1
-        versionName "0.2.2"
+        versionName "0.2.3"
 
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
 
diff --git a/treeadapter/src/main/java/com/kanade/treeadapter/RvTree.java b/treeadapter/src/main/java/com/kanade/treeadapter/RvTree.java
index b772632..6c4f3af 100644
--- a/treeadapter/src/main/java/com/kanade/treeadapter/RvTree.java
+++ b/treeadapter/src/main/java/com/kanade/treeadapter/RvTree.java
@@ -1,7 +1,7 @@
 package com.kanade.treeadapter;
 
 public interface RvTree {
-    long getId();
+    long getNid();
 
     long getPid();
 
diff --git a/treeadapter/src/main/java/com/kanade/treeadapter/TreeAdapter.java b/treeadapter/src/main/java/com/kanade/treeadapter/TreeAdapter.java
index 86b2571..071d213 100644
--- a/treeadapter/src/main/java/com/kanade/treeadapter/TreeAdapter.java
+++ b/treeadapter/src/main/java/com/kanade/treeadapter/TreeAdapter.java
@@ -64,7 +64,6 @@ public T getItemById(int id) {
     public void setNodes(List<T> data) {
         List<Node<T>> allNodes = TreeHelper.getSortedNode(data, 0);
         mNodes = TreeHelper.<T>filterVisibleNode(allNodes);
-        notifyDataSetChanged();
     }
 
     /**
diff --git a/treeadapter/src/main/java/com/kanade/treeadapter/TreeHelper.java b/treeadapter/src/main/java/com/kanade/treeadapter/TreeHelper.java
index 6e85452..0c1f1f3 100644
--- a/treeadapter/src/main/java/com/kanade/treeadapter/TreeHelper.java
+++ b/treeadapter/src/main/java/com/kanade/treeadapter/TreeHelper.java
@@ -48,7 +48,7 @@ private static <T extends RvTree> List<Node<T>> convertData2Node(List<T> data) {
         List<Node<T>> list = new ArrayList<>();
         for (T item : data) {
             Node<T> node = new Node<>();
-            node.setId(item.getId());
+            node.setId(item.getNid());
             node.setpId(item.getPid());
             node.setName(item.getTitle());
             node.setResId(item.getImageResId());