diff --git a/flap/src/main/java/me/yifeiyuan/flap/Flap.kt b/flap/src/main/java/me/yifeiyuan/flap/Flap.kt
index f717df06..2d5e75fa 100644
--- a/flap/src/main/java/me/yifeiyuan/flap/Flap.kt
+++ b/flap/src/main/java/me/yifeiyuan/flap/Flap.kt
@@ -290,7 +290,7 @@ class Flap : FlapApi {
         bindingContext = recyclerView.context
 
         if (bindingContext is Activity) {
-            activityContext = bindingContext
+            activityContext = bindingContext as Activity
         }
 
         //当没设置 lifecycleOwner 尝试获取 context 作为 LifecycleOwner