diff --git a/AndroidDocument.md b/AndroidDocument.md
index 1bf1716..b5dcf5d 100644
--- a/AndroidDocument.md
+++ b/AndroidDocument.md
@@ -88,6 +88,11 @@ Help==>About Eclips点击Android对应的图标就可以查看版本了.
         android:configChanges="orientation|screenLayout"
         android:theme="@android:style/Theme.Translucent.NoTitleBar" >
     </activity>
+    <activity
+            android:name="com.gumptech.sdk.ExchangeWindow"
+            android:configChanges="orientation|screenLayout"
+            android:theme="@style/ex_win" >
+    </activity>
     <!-- paypal -->
     <service
         android:name="com.paypal.android.sdk.payments.PayPalService"