diff --git a/pinview/src/main/java/com/chaos/view/PinView.java b/pinview/src/main/java/com/chaos/view/PinView.java
index 595dff1..51f9611 100644
--- a/pinview/src/main/java/com/chaos/view/PinView.java
+++ b/pinview/src/main/java/com/chaos/view/PinView.java
@@ -146,7 +146,7 @@ public PinView(Context context, @Nullable AttributeSet attrs, int defStyleAttr)
         mCursorWidth = a.getDimensionPixelSize(R.styleable.PinView_cursorWidth,
                 res.getDimensionPixelSize(R.dimen.pv_pin_view_cursor_width));
 
-        mItemBackground = a.getDrawable(R.styleable.PinView_itemBackground);
+        mItemBackground = a.getDrawable(R.styleable.PinView_android_itemBackground);
 
         a.recycle();
 
@@ -895,7 +895,7 @@ public int getCursorColor() {
      * a Drawable object or 0 to remove the item background.
      *
      * @param resId The identifier of the resource.
-     * @attr ref R.styleable#PinView_itemBackground
+     * @attr ref R.styleable#PinView_android_itemBackground
      */
     public void setItemBackgroundResources(@DrawableRes int resId) {
         if (resId != 0 && mItemBackgroundResource != resId) {
diff --git a/pinview/src/main/res/values/attrs.xml b/pinview/src/main/res/values/attrs.xml
index 5aa104c..3431e5f 100644
--- a/pinview/src/main/res/values/attrs.xml
+++ b/pinview/src/main/res/values/attrs.xml
@@ -36,6 +36,6 @@
         <attr name="android:cursorVisible" />
         <attr name="cursorWidth" format="dimension" />
         <attr name="cursorColor" format="reference|color" />
-        <attr name="itemBackground" format="reference|color" />
+        <attr name="android:itemBackground" />
     </declare-styleable>
 </resources>
\ No newline at end of file
diff --git a/simple/src/main/res/layout/activity_main.xml b/simple/src/main/res/layout/activity_main.xml
index e04bf10..1833b03 100644
--- a/simple/src/main/res/layout/activity_main.xml
+++ b/simple/src/main/res/layout/activity_main.xml
@@ -33,13 +33,13 @@
         android:cursorVisible="true"
         android:hint="Hint."
         android:inputType="text"
+        android:itemBackground="@mipmap/ic_launcher"
         android:padding="@dimen/common_padding"
         android:textColor="@color/text_colors"
         android:textSize="18sp"
         android:textStyle="bold"
         app:cursorColor="@color/line_selected"
         app:cursorWidth="2dp"
-        app:itemBackground="@mipmap/ic_launcher"
         app:itemCount="5"
         app:itemHeight="48dp"
         app:itemRadius="4dp"