added capability to add new node at any position (not just last)

app/build.gradle

@@ -16,6 +16,7 @@ android {
             minifyEnabled false
         }
     }
+    buildToolsVersion '25.0.0'
 }
 
 dependencies {

build.gradle

@@ -5,7 +5,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:1.0.0'
+        classpath 'com.android.tools.build:gradle:2.3.3'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Wed Apr 10 15:27:10 PDT 2013
+#Mon Sep 18 14:38:39 IST 2017
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.2.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-3.3-all.zip

library/build.gradle

@@ -15,6 +15,7 @@ android {
             minifyEnabled false
         }
     }
+    buildToolsVersion '25.0.0'
 }
 
 dependencies {

library/src/main/java/com/unnamed/b/atv/model/TreeNode.java

@@ -53,6 +53,23 @@ public TreeNode addChild(TreeNode childNode) {
         return this;
     }
 
+    /**
+     * Adds a child node at give position
+     * @param childNode
+     * @param position Fist position is 0. If -1, child is inserted at the end
+     * @return
+     */
+    public TreeNode addChild(TreeNode childNode, int position) {
+        childNode.mParent = this;
+        childNode.mId = generateId();
+
+        if(position == -1 || position > children.size())
+            position = childNode.size();
+
+        children.add(position, childNode);
+        return this;
+    }
+
     public TreeNode addChildren(TreeNode... nodes) {
         for (TreeNode n : nodes) {
             addChild(n);

library/src/main/java/com/unnamed/b/atv/view/AndroidTreeView.java

@@ -238,7 +238,7 @@ private void expandNode(final TreeNode node, boolean includeSubnodes) {
         parentViewHolder.toggle(true);
 
         for (final TreeNode n : node.getChildren()) {
-            addNode(parentViewHolder.getNodeItemsView(), n);
+            addNode(parentViewHolder.getNodeItemsView(), n, -1);
 
             if (n.isExpanded() || includeSubnodes) {
                 expandNode(n, includeSubnodes);
@@ -253,10 +253,20 @@ private void expandNode(final TreeNode node, boolean includeSubnodes) {
 
     }
 
-    private void addNode(ViewGroup container, final TreeNode n) {
+    /**
+     * Add the view corresponding to TreeNode to the View Group
+     * @param container
+     * @param n
+     */
+    private void addNode(ViewGroup container, final TreeNode n, int index) {
         final TreeNode.BaseNodeViewHolder viewHolder = getViewHolderForNode(n);
         final View nodeView = viewHolder.getView();
-        container.addView(nodeView);
+
+        if(index == -1)
+            container.addView(nodeView);
+        else
+            container.addView(nodeView, index);
+
         if (mSelectionModeEnabled) {
             viewHolder.toggleSelectionMode(mSelectionModeEnabled);
         }
@@ -467,11 +477,26 @@ public boolean willChangeBounds() {
     //-----------------------------------------------------------------
     //Add / Remove
 
+    /**
+     * Add the node in the end
+     * @param parent
+     * @param nodeToAdd
+     */
     public void addNode(TreeNode parent, final TreeNode nodeToAdd) {
-        parent.addChild(nodeToAdd);
+        addNode(parent, nodeToAdd, -1);
+    }
+
+    /**
+     * Adds the node at given position
+     * @param parent
+     * @param nodeToAdd
+     * @param position if -1, node is add in the last
+     */
+    public void addNode(TreeNode parent, final TreeNode nodeToAdd, int position) {
+        parent.addChild(nodeToAdd, position);
         if (parent.isExpanded()) {
             final TreeNode.BaseNodeViewHolder parentViewHolder = getViewHolderForNode(parent);
-            addNode(parentViewHolder.getNodeItemsView(), nodeToAdd);
+            addNode(parentViewHolder.getNodeItemsView(), nodeToAdd, position);
         }
     }