diff --git a/core/java/android/view/ViewRootImpl.java b/core/java/android/view/ViewRootImpl.java
index b1a580219a426..d0f095c0dbf0b 100644
--- a/core/java/android/view/ViewRootImpl.java
+++ b/core/java/android/view/ViewRootImpl.java
@@ -1402,6 +1402,8 @@ public final class ViewRootImpl implements ViewParent,
                                 listener, listener.data, mHandler, true /*waitForPresentTime*/);
                         mAttachInfo.mThreadedRenderer.addObserver(mHardwareRendererObserver);
                     }
+                    // Update unbuffered request when set the root view.
+                    mUnbufferedInputSource = mView.mUnbufferedInputSource;
                 }
 
                 view.assignParent(this);