diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index bed4fa9..700e042 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -2787,6 +2787,17 @@
     }
 
     /**
+     * Informs us that the overlay (-1 screen, typically), has either become visible or invisible.
+     */
+    public void onOverlayVisibilityChanged(boolean visible) {}
+
+    /**
+     * Informs us that the page transition has ended, so that we can react to the newly selected
+     * page if we want to.
+     */
+    public void onPageEndTransition() {}
+
+    /**
      * Add the icons for all apps.
      *
      * Implementation of the method from LauncherModel.Callbacks.
diff --git a/src/com/android/launcher3/Workspace.java b/src/com/android/launcher3/Workspace.java
index 65006ff..b3ff38f 100644
--- a/src/com/android/launcher3/Workspace.java
+++ b/src/com/android/launcher3/Workspace.java
@@ -1135,6 +1135,10 @@
             stripEmptyScreens();
             mStripScreensOnPageStopMoving = false;
         }
+
+        // Inform the Launcher activity that the page transition ended so that it can react to the
+        // newly visible page if it wants to.
+        mLauncher.onPageEndTransition();
     }
 
     public void setLauncherOverlay(LauncherOverlay overlay) {
@@ -1211,6 +1215,10 @@
                         .log(LAUNCHER_SWIPELEFT);
             }
             mOverlayShown = true;
+
+            // Let the Launcher activity know that the overlay is now visible.
+            mLauncher.onOverlayVisibilityChanged(mOverlayShown);
+
             // Not announcing the overlay page for accessibility since it announces itself.
         } else if (Float.compare(scroll, 0f) == 0) {
             if (mOverlayShown) {
@@ -1234,6 +1242,10 @@
                 announcePageForAccessibility();
             }
             mOverlayShown = false;
+
+            // Let the Launcher activity know that the overlay is no longer visible.
+            mLauncher.onOverlayVisibilityChanged(mOverlayShown);
+
             tryRunOverlayCallback();
         }
 
diff --git a/src/com/android/launcher3/statemanager/StatefulActivity.java b/src/com/android/launcher3/statemanager/StatefulActivity.java
index e036943..b45c97b 100644
--- a/src/com/android/launcher3/statemanager/StatefulActivity.java
+++ b/src/com/android/launcher3/statemanager/StatefulActivity.java
@@ -152,7 +152,7 @@
     /**
      * Called if the Activity UI changed while the activity was not visible
      */
-    protected void onUiChangedWhileSleeping() { }
+    public void onUiChangedWhileSleeping() { }
 
     private void handleDeferredResume() {
         if (hasBeenResumed() && !getStateManager().getState().hasFlag(FLAG_NON_INTERACTIVE)) {