diff --git a/multilibrary/src/main/java/com/zhongjh/albumcamerarecorder/MainActivity.java b/multilibrary/src/main/java/com/zhongjh/albumcamerarecorder/MainActivity.java
index 3d5cf875..dda226a5 100644
--- a/multilibrary/src/main/java/com/zhongjh/albumcamerarecorder/MainActivity.java
+++ b/multilibrary/src/main/java/com/zhongjh/albumcamerarecorder/MainActivity.java
@@ -134,8 +134,10 @@ public void finish() {
 
     @Override
     protected void onDestroy() {
+        if (mLayoutMediator != null) {
+            mLayoutMediator.detach();
+        }
         super.onDestroy();
-        mLayoutMediator.detach();
     }
 
     @Override