diff --git a/build.gradle b/build.gradle
index 00c7f2f..a51df07 100644
--- a/build.gradle
+++ b/build.gradle
@@ -30,6 +30,6 @@ ext {
     minSdkVersion = 15
     targetSdkVersion = 25
     supportVersion = "25.3.1"
-    versionCode = 31
-    versionName = "3.1.0"
+    versionCode = 32
+    versionName = "3.1.1"
 }
diff --git a/widget-core/src/main/java/com/aries/ui/helper/navigation/NavigationViewHelper.java b/widget-core/src/main/java/com/aries/ui/helper/navigation/NavigationViewHelper.java
index 6af5ff0..c69ce3b 100644
--- a/widget-core/src/main/java/com/aries/ui/helper/navigation/NavigationViewHelper.java
+++ b/widget-core/src/main/java/com/aries/ui/helper/navigation/NavigationViewHelper.java
@@ -27,6 +27,7 @@
  * Description:
  * 1、修改NavigationLayoutDrawable默认保持与activity的根布局背景一致
  * 2、2018-2-26 15:56:47 新增setBottomView(View bottomView, boolean enable)用于控制底部View设置padding/margin
+ * 3、2018-4-18 17:50:35 去掉设置Activity DecorView 背景操作避免滑动返回背景不透明BUG
  */
 public class NavigationViewHelper {
 
@@ -102,7 +103,6 @@ public NavigationViewHelper setTransEnable(boolean transEnable) {
         setNavigationLayoutColor(Color.WHITE);
         if (mContentView != null && mContentView.getBackground() != null) {
             setNavigationLayoutDrawable(DrawableUtil.getNewDrawable(mContentView.getBackground()));
-            mDecorView.setBackgroundDrawable(DrawableUtil.getNewDrawable(mContentView.getBackground()));
         }
         return setNavigationViewColor(transEnable ? Color.TRANSPARENT : Color.argb(102, 0, 0, 0));
     }