diff --git a/quickstep/src/com/android/quickstep/BaseActivityInterface.java b/quickstep/src/com/android/quickstep/BaseActivityInterface.java
index 4ae6fa8..7ab371b 100644
--- a/quickstep/src/com/android/quickstep/BaseActivityInterface.java
+++ b/quickstep/src/com/android/quickstep/BaseActivityInterface.java
@@ -114,6 +114,9 @@
 
     public abstract void onAssistantVisibilityChanged(float visibility);
 
+    /** Called when one handed mode activated or deactivated. */
+    public abstract void onOneHandedModeStateChanged(boolean activated);
+
     public abstract AnimationFactory prepareRecentsUI(RecentsAnimationDeviceState deviceState,
             boolean activityVisible, Consumer<AnimatorControllerWithResistance> callback);
 
diff --git a/quickstep/src/com/android/quickstep/FallbackActivityInterface.java b/quickstep/src/com/android/quickstep/FallbackActivityInterface.java
index 4ee4398..906599f 100644
--- a/quickstep/src/com/android/quickstep/FallbackActivityInterface.java
+++ b/quickstep/src/com/android/quickstep/FallbackActivityInterface.java
@@ -73,6 +73,11 @@
         // set to zero prior to this class becoming active.
     }
 
+    @Override
+    public void onOneHandedModeStateChanged(boolean activated) {
+        // Do nothing for FallbackActivityInterface
+    }
+
     /** 6 */
     @Override
     public AnimationFactory prepareRecentsUI(RecentsAnimationDeviceState deviceState,
diff --git a/quickstep/src/com/android/quickstep/LauncherActivityInterface.java b/quickstep/src/com/android/quickstep/LauncherActivityInterface.java
index 9014774..30abfbb 100644
--- a/quickstep/src/com/android/quickstep/LauncherActivityInterface.java
+++ b/quickstep/src/com/android/quickstep/LauncherActivityInterface.java
@@ -105,6 +105,15 @@
     }
 
     @Override
+    public void onOneHandedModeStateChanged(boolean activated) {
+        Launcher launcher = getCreatedActivity();
+        if (launcher == null) {
+            return;
+        }
+        launcher.onOneHandedStateChanged(activated);
+    }
+
+    @Override
     public AnimationFactory prepareRecentsUI(RecentsAnimationDeviceState deviceState,
             boolean activityVisible, Consumer<AnimatorControllerWithResistance> callback) {
         notifyRecentsOfOrientation(deviceState.getRotationTouchHelper());
diff --git a/quickstep/src/com/android/quickstep/OverviewComponentObserver.java b/quickstep/src/com/android/quickstep/OverviewComponentObserver.java
index fb8f9fe..0efe666 100644
--- a/quickstep/src/com/android/quickstep/OverviewComponentObserver.java
+++ b/quickstep/src/com/android/quickstep/OverviewComponentObserver.java
@@ -111,6 +111,11 @@
         if (mDeviceState.isHomeDisabled() != mIsHomeDisabled) {
             updateOverviewTargets();
         }
+
+        // Notify ALL_APPS touch controller when one handed mode state activated or deactivated
+        if (mDeviceState.isOneHandedModeEnabled()) {
+            mActivityInterface.onOneHandedModeStateChanged(mDeviceState.isOneHandedModeActive());
+        }
     }
 
     private void updateOverviewTargets(Intent unused) {
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 8889e60..299c68f 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -576,6 +576,14 @@
         mHotseat.getQsb().setAlpha(1f - visibility);
     }
 
+    /**
+     * Called when one handed mode activated and deactivated.
+     * @param activated true if one handed mode activated, false otherwise.
+     */
+    public void onOneHandedStateChanged(boolean activated) {
+        mDragLayer.onOneHandedModeStateChanged(activated);
+    }
+
     private void initDeviceProfile(InvariantDeviceProfile idp) {
         // Load configuration-specific DeviceProfile
         mDeviceProfile = idp.getDeviceProfile(this);