diff --git a/app/src/main/java/com/fc/nestedscrollview/example/fragment/Tab1Fragment.kt b/app/src/main/java/com/fc/nestedscrollview/example/fragment/Tab1Fragment.kt
index 58adc32..a5bc5a0 100644
--- a/app/src/main/java/com/fc/nestedscrollview/example/fragment/Tab1Fragment.kt
+++ b/app/src/main/java/com/fc/nestedscrollview/example/fragment/Tab1Fragment.kt
@@ -63,7 +63,7 @@ class Tab1Fragment : Fragment() {
                     Log.i("ifNeedScrollToBottom", "scroll to top")
                     // 1. scroll to recyclerView top position
                     val topOffset = rect.top - scrollViewRect.top
-                    it.scrollBy(0, topOffset)
+                    it.smoothScrollBy(0, topOffset)
                     // 2. scroll itemView height distance
 //                    it.smoothScrollBy(0, -source.itemView.height)
                     // 3. scroll to scrollview top