diff --git a/cocos/ui/UILayout.cpp b/cocos/ui/UILayout.cpp
index 61fbf55179..f8c91e1268 100644
--- a/cocos/ui/UILayout.cpp
+++ b/cocos/ui/UILayout.cpp
@@ -932,7 +932,7 @@ void Layout::requestDoLayout()
     _doLayoutDirty = true;
 }
     
-const Size Layout::getLayoutContentSize()const
+Size Layout::getLayoutContentSize()const
 {
     return this->getSize();
 }
diff --git a/cocos/ui/UILayout.h b/cocos/ui/UILayout.h
index e869f4f108..09086cbea7 100644
--- a/cocos/ui/UILayout.h
+++ b/cocos/ui/UILayout.h
@@ -40,7 +40,7 @@ public:
     virtual ~LayoutProtocol(){}
     
     virtual LayoutExecutant* createLayoutExecutant() = 0;
-    virtual const Size getLayoutContentSize()const = 0;
+    virtual Size getLayoutContentSize()const = 0;
     virtual const Vector<Node*>& getLayoutElements()const = 0;
     virtual void doLayout() = 0;
 };
@@ -329,7 +329,7 @@ protected:
     
     virtual void doLayout()override;
     virtual LayoutExecutant* createLayoutExecutant()override;
-    virtual const Size getLayoutContentSize()const override;
+    virtual Size getLayoutContentSize()const override;
     virtual const Vector<Node*>& getLayoutElements()const override;
     
     //clipping
diff --git a/cocos/ui/UIWidget.h b/cocos/ui/UIWidget.h
index 780b34ea1d..53a0bd5ff2 100644
--- a/cocos/ui/UIWidget.h
+++ b/cocos/ui/UIWidget.h
@@ -596,6 +596,10 @@ public:
     }
 
     Widget* getCurrentFocusedWidget()const;
+    /*
+     *  call this method with parameter true to enable the Android Dpad focus navigation feature
+     *@param enable  set true to enable dpad focus navigation, otherwise disenable dpad focus navigation
+     */
     static void enableDpadNavigation(bool enable);
 
     std::function<void(Widget*,Widget*)> onFocusChanged;