diff --git a/src/com/android/launcher3/PagedView.java b/src/com/android/launcher3/PagedView.java
index e38631d..7d7739e 100644
--- a/src/com/android/launcher3/PagedView.java
+++ b/src/com/android/launcher3/PagedView.java
@@ -50,6 +50,8 @@
 import static com.android.launcher3.touch.PagedOrientationHandler.VIEW_SCROLL_BY;
 import static com.android.launcher3.touch.PagedOrientationHandler.VIEW_SCROLL_TO;
 
+import androidx.annotation.Nullable;
+
 import com.android.launcher3.anim.Interpolators;
 import com.android.launcher3.compat.AccessibilityManagerCompat;
 import com.android.launcher3.config.FeatureFlags;
@@ -133,6 +135,7 @@
     protected int mActivePointerId = INVALID_POINTER;
 
     protected boolean mIsPageInTransition = false;
+    private Runnable mOnPageTransitionEndCallback;
 
     protected float mSpringOverScroll;
 
@@ -391,6 +394,22 @@
         AccessibilityManagerCompat.sendScrollFinishedEventToTest(getContext());
         AccessibilityManagerCompat.sendCustomAccessibilityEvent(getPageAt(mCurrentPage),
                 AccessibilityEvent.TYPE_VIEW_FOCUSED, null);
+        if (mOnPageTransitionEndCallback != null) {
+            mOnPageTransitionEndCallback.run();
+            mOnPageTransitionEndCallback = null;
+        }
+    }
+
+    /**
+     * Sets a callback to run once when the scrolling finishes. If there is currently
+     * no page in transition, then the callback is called immediately.
+     */
+    public void setOnPageTransitionEndCallback(@Nullable Runnable callback) {
+        if (mIsPageInTransition || callback == null) {
+            mOnPageTransitionEndCallback = callback;
+        } else {
+            callback.run();
+        }
     }
 
     protected int getUnboundedScroll() {
diff --git a/src/com/android/launcher3/util/OverScroller.java b/src/com/android/launcher3/util/OverScroller.java
index 3c398b8..34efb12 100644
--- a/src/com/android/launcher3/util/OverScroller.java
+++ b/src/com/android/launcher3/util/OverScroller.java
@@ -165,6 +165,9 @@
     /**
      * Returns how long the scroll event will take, in milliseconds.
      *
+     * Note that if mScroller.mState == SPRING, this duration is ignored, so can only
+     * serve as an estimate for how long the spring-controlled scroll will take.
+     *
      * @return The duration of the scroll in milliseconds.
      */
     public final int getDuration() {