diff --git a/core/java/android/app/Activity.java b/core/java/android/app/Activity.java
index db5dcc5c264bd..643020a7dbd26 100644
--- a/core/java/android/app/Activity.java
+++ b/core/java/android/app/Activity.java
@@ -1539,6 +1539,17 @@ public class Activity extends ContextThemeWrapper
         getApplication().dispatchActivityPostDestroyed(this);
     }
 
+    private void dispatchActivityConfigurationChanged() {
+        getApplication().dispatchActivityConfigurationChanged(this);
+        Object[] callbacks = collectActivityLifecycleCallbacks();
+        if (callbacks != null) {
+            for (int i = 0; i < callbacks.length; i++) {
+                ((Application.ActivityLifecycleCallbacks) callbacks[i])
+                        .onActivityConfigurationChanged(this);
+            }
+        }
+    }
+
     private Object[] collectActivityLifecycleCallbacks() {
         Object[] callbacks = null;
         synchronized (mActivityLifecycleCallbacks) {
@@ -3028,6 +3039,8 @@ public class Activity extends ContextThemeWrapper
             // view changes from above.
             mActionBar.onConfigurationChanged(newConfig);
         }
+
+        dispatchActivityConfigurationChanged();
     }
 
     /**
diff --git a/core/java/android/app/Application.java b/core/java/android/app/Application.java
index 618eda8c84e89..a1eab6553cff0 100644
--- a/core/java/android/app/Application.java
+++ b/core/java/android/app/Application.java
@@ -205,6 +205,13 @@ public class Application extends ContextWrapper implements ComponentCallbacks2 {
          */
         default void onActivityPostDestroyed(@NonNull Activity activity) {
         }
+
+        /**
+         * Called when the Activity configuration was changed.
+         * @hide
+         */
+        default void onActivityConfigurationChanged(@NonNull Activity activity) {
+        }
     }
 
     /**
@@ -554,6 +561,16 @@ public class Application extends ContextWrapper implements ComponentCallbacks2 {
         }
     }
 
+    /* package */ void dispatchActivityConfigurationChanged(@NonNull Activity activity) {
+        Object[] callbacks = collectActivityLifecycleCallbacks();
+        if (callbacks != null) {
+            for (int i = 0; i < callbacks.length; i++) {
+                ((ActivityLifecycleCallbacks) callbacks[i]).onActivityConfigurationChanged(
+                        activity);
+            }
+        }
+    }
+
     @UnsupportedAppUsage
     private Object[] collectActivityLifecycleCallbacks() {
         Object[] callbacks = null;
diff --git a/libs/WindowManager/Jetpack/src/androidx/window/extensions/organizer/SplitController.java b/libs/WindowManager/Jetpack/src/androidx/window/extensions/organizer/SplitController.java
index 7298d34977704..ca04eae242c1a 100644
--- a/libs/WindowManager/Jetpack/src/androidx/window/extensions/organizer/SplitController.java
+++ b/libs/WindowManager/Jetpack/src/androidx/window/extensions/organizer/SplitController.java
@@ -213,6 +213,20 @@ public class SplitController implements JetpackTaskFragmentOrganizer.TaskFragmen
         updateCallbackIfNecessary();
     }
 
+    private void onActivityConfigurationChanged(@NonNull Activity activity) {
+        final TaskFragmentContainer currentContainer = getContainerWithActivity(
+                activity.getActivityToken());
+
+        if (currentContainer != null) {
+            // Changes to activities in controllers are handled in
+            // onTaskFragmentParentInfoChanged
+            return;
+        }
+
+        // Check if activity requires a placeholder
+        launchPlaceholderIfNecessary(activity);
+    }
+
     /**
      * Returns a container that this activity is registered with. An activity can only belong to one
      * container, or no container at all.
@@ -546,6 +560,10 @@ public class SplitController implements JetpackTaskFragmentOrganizer.TaskFragmen
 
         @Override
         public void onActivityCreated(Activity activity, Bundle savedInstanceState) {
+        }
+
+        @Override
+        public void onActivityPostCreated(Activity activity, Bundle savedInstanceState) {
             // Calling after Activity#onCreate is complete to allow the app launch something
             // first. In case of a configured placeholder activity we want to make sure
             // that we don't launch it if an activity itself already requested something to be
@@ -576,5 +594,10 @@ public class SplitController implements JetpackTaskFragmentOrganizer.TaskFragmen
         @Override
         public void onActivityDestroyed(Activity activity) {
         }
+
+        @Override
+        public void onActivityConfigurationChanged(Activity activity) {
+            SplitController.this.onActivityConfigurationChanged(activity);
+        }
     }
 }