diff --git a/src/com/android/launcher3/AbstractFloatingView.java b/src/com/android/launcher3/AbstractFloatingView.java
index 21dbc5f..5ee6fce 100644
--- a/src/com/android/launcher3/AbstractFloatingView.java
+++ b/src/com/android/launcher3/AbstractFloatingView.java
@@ -109,10 +109,6 @@
             | TYPE_ALL_APPS_EDU | TYPE_ICON_SURFACE | TYPE_WIDGETS_EDUCATION_DIALOG
             | TYPE_TASKBAR_EDUCATION_DIALOG | TYPE_TASKBAR_ALL_APPS | TYPE_OPTIONS_POPUP_DIALOG;
 
-    // Usually we show the back button when a floating view is open. Instead, hide for these types.
-    public static final int TYPE_HIDE_BACK_BUTTON = TYPE_ON_BOARD_POPUP | TYPE_DISCOVERY_BOUNCE
-            | TYPE_SNACKBAR | TYPE_WIDGET_RESIZE_FRAME | TYPE_LISTENER;
-
     public static final int TYPE_ACCESSIBLE = TYPE_ALL & ~TYPE_DISCOVERY_BOUNCE & ~TYPE_LISTENER
             & ~TYPE_ALL_APPS_EDU;
 
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 4312c3d..8e978d1 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -1123,6 +1123,7 @@
                         .log(getAllAppsEntryEvent().get());
             }
         }
+        updateDisallowBack();
     }
 
     /**
@@ -3133,7 +3134,18 @@
 
     public void useFadeOutAnimationForLauncherStart(CancellationSignal signal) { }
 
-    public void onDragLayerHierarchyChanged() { }
+    public void onDragLayerHierarchyChanged() {
+        updateDisallowBack();
+    }
+
+    private void updateDisallowBack() {
+        LauncherRootView rv = getRootView();
+        if (rv != null) {
+            boolean disableBack = getStateManager().getState() == NORMAL
+                    && AbstractFloatingView.getTopOpenView(this) == null;
+            rv.setDisallowBackGesture(disableBack);
+        }
+    }
 
     @Override
     public void returnToHomescreen() {
diff --git a/src/com/android/launcher3/LauncherState.java b/src/com/android/launcher3/LauncherState.java
index c3b5392..31a7d18 100644
--- a/src/com/android/launcher3/LauncherState.java
+++ b/src/com/android/launcher3/LauncherState.java
@@ -71,17 +71,14 @@
     public static final int FLAG_WORKSPACE_ICONS_CAN_BE_DRAGGED = BaseState.getFlag(2);
     // Flag to indicate that workspace should draw page background
     public static final int FLAG_WORKSPACE_HAS_BACKGROUNDS = BaseState.getFlag(3);
-    // True if the back button should be hidden when in this state (assuming no floating views are
-    // open, launcher has window focus, etc).
-    public static final int FLAG_HIDE_BACK_BUTTON = BaseState.getFlag(4);
     // Flag to indicate if the state would have scrim over sysui region: statu sbar and nav bar
-    public static final int FLAG_HAS_SYS_UI_SCRIM = BaseState.getFlag(5);
+    public static final int FLAG_HAS_SYS_UI_SCRIM = BaseState.getFlag(4);
     // Flag to inticate that all popups should be closed when this state is enabled.
-    public static final int FLAG_CLOSE_POPUPS = BaseState.getFlag(6);
-    public static final int FLAG_OVERVIEW_UI = BaseState.getFlag(7);
+    public static final int FLAG_CLOSE_POPUPS = BaseState.getFlag(5);
+    public static final int FLAG_OVERVIEW_UI = BaseState.getFlag(6);
 
     // Flag indicating that hotseat and its contents are not accessible.
-    public static final int FLAG_HOTSEAT_INACCESSIBLE = BaseState.getFlag(8);
+    public static final int FLAG_HOTSEAT_INACCESSIBLE = BaseState.getFlag(7);
 
 
     public static final float NO_OFFSET = 0;
@@ -110,8 +107,7 @@
      */
     public static final LauncherState NORMAL = new LauncherState(NORMAL_STATE_ORDINAL,
             LAUNCHER_STATE_HOME,
-            FLAG_DISABLE_RESTORE | FLAG_WORKSPACE_ICONS_CAN_BE_DRAGGED | FLAG_HIDE_BACK_BUTTON |
-                    FLAG_HAS_SYS_UI_SCRIM) {
+            FLAG_DISABLE_RESTORE | FLAG_WORKSPACE_ICONS_CAN_BE_DRAGGED | FLAG_HAS_SYS_UI_SCRIM) {
         @Override
         public int getTransitionDuration(Context context, boolean isToState) {
             // Arbitrary duration, when going to NORMAL we use the state we're coming from instead.
diff --git a/src/com/android/launcher3/states/SpringLoadedState.java b/src/com/android/launcher3/states/SpringLoadedState.java
index b63715c..3286afb 100644
--- a/src/com/android/launcher3/states/SpringLoadedState.java
+++ b/src/com/android/launcher3/states/SpringLoadedState.java
@@ -31,8 +31,7 @@
 
     private static final int STATE_FLAGS = FLAG_MULTI_PAGE
             | FLAG_WORKSPACE_INACCESSIBLE | FLAG_DISABLE_RESTORE
-            | FLAG_WORKSPACE_ICONS_CAN_BE_DRAGGED | FLAG_WORKSPACE_HAS_BACKGROUNDS
-            | FLAG_HIDE_BACK_BUTTON;
+            | FLAG_WORKSPACE_ICONS_CAN_BE_DRAGGED | FLAG_WORKSPACE_HAS_BACKGROUNDS;
 
     public SpringLoadedState(int id) {
         super(id, LAUNCHER_STATE_HOME, STATE_FLAGS);
diff --git a/src/com/android/launcher3/util/UiThreadHelper.java b/src/com/android/launcher3/util/UiThreadHelper.java
index b952090..013479f 100644
--- a/src/com/android/launcher3/util/UiThreadHelper.java
+++ b/src/com/android/launcher3/util/UiThreadHelper.java
@@ -97,11 +97,6 @@
                 .sendToTarget();
     }
 
-    public static void setBackButtonAlphaAsync(Context context, AsyncCommand command, float alpha,
-            boolean animate) {
-        runAsyncCommand(context, command, Float.floatToIntBits(alpha), animate ? 1 : 0);
-    }
-
     public static void runAsyncCommand(Context context, AsyncCommand command, int arg1, int arg2) {
         Message.obtain(HANDLER.get(context), MSG_RUN_COMMAND, arg1, arg2, command).sendToTarget();
     }