diff --git a/src/main/java/com/reandroid/arsc/chunk/xml/ResXmlElement.java b/src/main/java/com/reandroid/arsc/chunk/xml/ResXmlElement.java
index f4ce6ef..57bc0fe 100755
--- a/src/main/java/com/reandroid/arsc/chunk/xml/ResXmlElement.java
+++ b/src/main/java/com/reandroid/arsc/chunk/xml/ResXmlElement.java
@@ -32,7 +32,8 @@
  import java.io.IOException;
  import java.util.*;
 
- public class ResXmlElement extends ResXmlNode implements JSONConvert<JSONObject> {
+ public class ResXmlElement extends ResXmlNode implements JSONConvert<JSONObject>,
+         Comparator<ResXmlNode> {
      private final BlockList<ResXmlStartNamespace> mStartNamespaceList;
      private final SingleBlockContainer<ResXmlStartElement> mStartElementContainer;
      private final BlockList<ResXmlNode> mBody;
@@ -52,6 +53,31 @@
          addChild(3, mEndElementContainer);
          addChild(4, mEndNamespaceList);
      }
+     public void changeIndex(ResXmlElement element, int index){
+         int i = 0;
+         for(ResXmlNode xmlNode:mBody.getChildes()){
+             if(i == index){
+                 element.setIndex(i);
+                 i++;
+             }
+             if(xmlNode==element){
+                 continue;
+             }
+             xmlNode.setIndex(i);
+             i++;
+         }
+         mBody.sort(this);
+     }
+     public int indexOf(ResXmlElement element){
+         int index = 0;
+         for(ResXmlNode xmlNode:mBody.getChildes()){
+             if(xmlNode==element){
+                 return index;
+             }
+             index++;
+         }
+         return -1;
+     }
      public void setAttributesUnitSize(int size, boolean setToAll){
          ResXmlStartElement startElement = getStartElement();
          startElement.setAttributesUnitSize(size);
@@ -849,6 +875,10 @@
          return xmlElement;
      }
      @Override
+     public int compare(ResXmlNode node1, ResXmlNode node2) {
+         return Integer.compare(node1.getIndex(), node2.getIndex());
+     }
+     @Override
      public String toString(){
          ResXmlStartElement start = getStartElement();
          if(start!=null){
diff --git a/src/main/java/com/reandroid/arsc/container/BlockList.java b/src/main/java/com/reandroid/arsc/container/BlockList.java
index 073a998..7902273 100755
--- a/src/main/java/com/reandroid/arsc/container/BlockList.java
+++ b/src/main/java/com/reandroid/arsc/container/BlockList.java
@@ -23,6 +23,7 @@ import com.reandroid.arsc.io.BlockReader;
 import java.io.IOException;
 import java.io.OutputStream;
 import java.util.ArrayList;
+import java.util.Comparator;
 import java.util.List;
 
 public class BlockList<T extends Block> extends Block {
@@ -31,6 +32,9 @@ public class BlockList<T extends Block> extends Block {
         super();
         mItems=new ArrayList<>();
     }
+    public void sort(Comparator<T> comparator){
+        mItems.sort(comparator);
+    }
     public boolean remove(T item){
         if(item!=null){
             item.setParent(null);