diff --git a/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/AllAppsTipView.java b/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/AllAppsTipView.java
index 079a738036..d93aea44a7 100644
--- a/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/AllAppsTipView.java
+++ b/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/AllAppsTipView.java
@@ -73,10 +73,6 @@ public class AllAppsTipView {
         if (!hasSeenAllAppsTip(launcher)) {
             launcher.getStateManager().addStateListener(
                     new LauncherStateManager.StateListener() {
-                        @Override
-                        public void onStateTransitionStart(LauncherState toState) {
-                        }
-
                         @Override
                         public void onStateTransitionComplete(LauncherState finalState) {
                             if (finalState == ALL_APPS) {
diff --git a/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/AppsDividerView.java b/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/AppsDividerView.java
index ec46418949..81a6070664 100644
--- a/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/AppsDividerView.java
+++ b/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/AppsDividerView.java
@@ -250,9 +250,6 @@ public class AppsDividerView extends View implements LauncherStateManager.StateL
         mLauncher.getStateManager().removeStateListener(this);
     }
 
-    @Override
-    public void onStateTransitionStart(LauncherState toState) { }
-
     @Override
     public void onStateTransitionComplete(LauncherState finalState) {
         if (finalState == ALL_APPS) {
diff --git a/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/PredictionUiStateManager.java b/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/PredictionUiStateManager.java
index 8e55609e7d..e68627a8f6 100644
--- a/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/PredictionUiStateManager.java
+++ b/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/PredictionUiStateManager.java
@@ -157,9 +157,6 @@ public class PredictionUiStateManager implements StateListener, ItemInfoUpdateRe
     @Override
     public void reapplyItemInfo(ItemInfoWithIcon info) { }
 
-    @Override
-    public void onStateTransitionStart(LauncherState toState) { }
-
     @Override
     public void onStateTransitionComplete(LauncherState state) {
         if (mAppsView == null) {
diff --git a/quickstep/src/com/android/quickstep/util/QuickstepOnboardingPrefs.java b/quickstep/src/com/android/quickstep/util/QuickstepOnboardingPrefs.java
index a678cb5302..aa6d56a568 100644
--- a/quickstep/src/com/android/quickstep/util/QuickstepOnboardingPrefs.java
+++ b/quickstep/src/com/android/quickstep/util/QuickstepOnboardingPrefs.java
@@ -41,9 +41,6 @@ public class QuickstepOnboardingPrefs extends OnboardingPrefs<BaseQuickstepLaunc
 
         if (!getBoolean(HOME_BOUNCE_SEEN)) {
             mStateManager.addStateListener(new StateListener() {
-                @Override
-                public void onStateTransitionStart(LauncherState toState) { }
-
                 @Override
                 public void onStateTransitionComplete(LauncherState finalState) {
                     boolean swipeUpEnabled = SysUINavigationMode.INSTANCE
@@ -69,9 +66,6 @@ public class QuickstepOnboardingPrefs extends OnboardingPrefs<BaseQuickstepLaunc
         }
         if (!shelfBounceSeen) {
             mStateManager.addStateListener(new StateListener() {
-                @Override
-                public void onStateTransitionStart(LauncherState toState) { }
-
                 @Override
                 public void onStateTransitionComplete(LauncherState finalState) {
                     LauncherState prevState = mStateManager.getLastState();
@@ -87,9 +81,6 @@ public class QuickstepOnboardingPrefs extends OnboardingPrefs<BaseQuickstepLaunc
 
         if (!hasReachedMaxCount(ALL_APPS_COUNT)) {
             mStateManager.addStateListener(new StateListener() {
-                @Override
-                public void onStateTransitionStart(LauncherState toState) { }
-
                 @Override
                 public void onStateTransitionComplete(LauncherState finalState) {
                     if (finalState == ALL_APPS) {
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index c4eab8fb49..070a3926c4 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -434,9 +434,6 @@ public class Launcher extends BaseDraggingActivity implements LauncherExterns,
         mRotationHelper.initialize();
 
         mStateManager.addStateListener(new LauncherStateManager.StateListener() {
-            @Override
-            public void onStateTransitionStart(LauncherState toState) {
-            }
 
             @Override
             public void onStateTransitionComplete(LauncherState finalState) {
diff --git a/src/com/android/launcher3/LauncherStateManager.java b/src/com/android/launcher3/LauncherStateManager.java
index e071777ba3..1d2e866150 100644
--- a/src/com/android/launcher3/LauncherStateManager.java
+++ b/src/com/android/launcher3/LauncherStateManager.java
@@ -600,7 +600,8 @@ public class LauncherStateManager {
 
     public interface StateListener {
 
-        void onStateTransitionStart(LauncherState toState);
-        void onStateTransitionComplete(LauncherState finalState);
+        default void onStateTransitionStart(LauncherState toState) { }
+
+        default void onStateTransitionComplete(LauncherState finalState) { }
     }
 }
diff --git a/src/com/android/launcher3/dragndrop/DragView.java b/src/com/android/launcher3/dragndrop/DragView.java
index d07635bc15..1e23bb6a71 100644
--- a/src/com/android/launcher3/dragndrop/DragView.java
+++ b/src/com/android/launcher3/dragndrop/DragView.java
@@ -175,9 +175,6 @@ public class DragView extends View implements LauncherStateManager.StateListener
         mLauncher.getStateManager().removeStateListener(this);
     }
 
-    @Override
-    public void onStateTransitionStart(LauncherState toState) { }
-
     @Override
     public void onStateTransitionComplete(LauncherState finalState) {
         setVisibility((finalState == LauncherState.NORMAL
diff --git a/src/com/android/launcher3/views/ScrimView.java b/src/com/android/launcher3/views/ScrimView.java
index 442c5fd4c8..da874cf3e1 100644
--- a/src/com/android/launcher3/views/ScrimView.java
+++ b/src/com/android/launcher3/views/ScrimView.java
@@ -117,9 +117,6 @@ public class ScrimView<T extends Launcher> extends View implements Insettable, O
     protected final int mEndScrim;
 
     private final StateListener mAccessibilityLauncherStateListener = new StateListener() {
-        @Override
-        public void onStateTransitionStart(LauncherState toState) {}
-
         @Override
         public void onStateTransitionComplete(LauncherState finalState) {
             setImportantForAccessibility(finalState == ALL_APPS
diff --git a/src/com/android/launcher3/views/WorkEduView.java b/src/com/android/launcher3/views/WorkEduView.java
index d849138369..552f662a32 100644
--- a/src/com/android/launcher3/views/WorkEduView.java
+++ b/src/com/android/launcher3/views/WorkEduView.java
@@ -188,11 +188,6 @@ public class WorkEduView extends AbstractSlideInView implements Insettable {
         }
 
         LauncherStateManager.StateListener listener = new LauncherStateManager.StateListener() {
-            @Override
-            public void onStateTransitionStart(LauncherState toState) {
-
-            }
-
             @Override
             public void onStateTransitionComplete(LauncherState finalState) {
                 if (finalState != LauncherState.ALL_APPS) return;