diff --git a/quickstep/res/values/dimens.xml b/quickstep/res/values/dimens.xml
index 68c3851..a0e87cf 100644
--- a/quickstep/res/values/dimens.xml
+++ b/quickstep/res/values/dimens.xml
@@ -130,4 +130,5 @@
     <dimen name="taskbar_icon_spacing">14dp</dimen>
     <dimen name="taskbar_divider_thickness">1dp</dimen>
     <dimen name="taskbar_divider_height">24dp</dimen>
+    <dimen name="taskbar_folder_margin">16dp</dimen>
 </resources>
diff --git a/quickstep/res/values/styles.xml b/quickstep/res/values/styles.xml
index 5a353f0..df089f6 100644
--- a/quickstep/res/values/styles.xml
+++ b/quickstep/res/values/styles.xml
@@ -89,6 +89,5 @@
     <!-- Icon displayed on the taskbar -->
     <style name="BaseIcon.Workspace.Taskbar" >
         <item name="iconDisplay">taskbar</item>
-        <item name="iconSizeOverride">@dimen/taskbar_icon_size</item>
     </style>
 </resources>
\ No newline at end of file
diff --git a/quickstep/src/com/android/launcher3/BaseQuickstepLauncher.java b/quickstep/src/com/android/launcher3/BaseQuickstepLauncher.java
index edcd0a2..d1fa2fd 100644
--- a/quickstep/src/com/android/launcher3/BaseQuickstepLauncher.java
+++ b/quickstep/src/com/android/launcher3/BaseQuickstepLauncher.java
@@ -30,7 +30,6 @@
 import android.content.IntentSender;
 import android.os.Bundle;
 import android.os.CancellationSignal;
-import android.view.LayoutInflater;
 import android.view.View;
 
 import androidx.annotation.Nullable;
@@ -43,7 +42,7 @@
 import com.android.launcher3.statehandlers.BackButtonAlphaHandler;
 import com.android.launcher3.statehandlers.DepthController;
 import com.android.launcher3.statemanager.StateManager.StateHandler;
-import com.android.launcher3.taskbar.TaskbarContainerView;
+import com.android.launcher3.taskbar.TaskbarActivityContext;
 import com.android.launcher3.taskbar.TaskbarController;
 import com.android.launcher3.taskbar.TaskbarStateHandler;
 import com.android.launcher3.uioverrides.RecentsViewStateController;
@@ -207,6 +206,7 @@
         mActionsView.updateVerticalMargin(SysUINavigationMode.getMode(this));
 
         addTaskbarIfNecessary();
+        addOnDeviceProfileChangeListener(newDp -> addTaskbarIfNecessary());
     }
 
     @Override
@@ -223,9 +223,9 @@
             mTaskbarController = null;
         }
         if (FeatureFlags.ENABLE_TASKBAR.get() && mDeviceProfile.isTablet) {
-            TaskbarContainerView taskbarContainer = (TaskbarContainerView) LayoutInflater.from(this)
-                    .inflate(R.layout.taskbar, null, false);
-            mTaskbarController = new TaskbarController(this, taskbarContainer);
+            TaskbarActivityContext taskbarActivityContext = new TaskbarActivityContext(this);
+            mTaskbarController = new TaskbarController(this,
+                    taskbarActivityContext.getTaskbarContainerView());
             mTaskbarController.init();
         }
     }
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
new file mode 100644
index 0000000..06372fe
--- /dev/null
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.launcher3.taskbar;
+
+import android.content.ContextWrapper;
+import android.graphics.Rect;
+import android.view.LayoutInflater;
+
+import com.android.launcher3.BaseQuickstepLauncher;
+import com.android.launcher3.DeviceProfile;
+import com.android.launcher3.R;
+import com.android.launcher3.views.ActivityContext;
+import com.android.launcher3.views.BaseDragLayer;
+
+/**
+ * The {@link ActivityContext} with which we inflate Taskbar-related Views. This allows UI elements
+ * that are used by both Launcher and Taskbar (such as Folder) to reference a generic
+ * ActivityContext and BaseDragLayer instead of the Launcher activity and its DragLayer.
+ */
+public class TaskbarActivityContext extends ContextWrapper implements ActivityContext {
+
+    private final DeviceProfile mDeviceProfile;
+    private final LayoutInflater mLayoutInflater;
+    private final TaskbarContainerView mTaskbarContainerView;
+
+    public TaskbarActivityContext(BaseQuickstepLauncher launcher) {
+        super(launcher);
+        mDeviceProfile = launcher.getDeviceProfile().copy(this);
+        float taskbarIconSize = getResources().getDimension(R.dimen.taskbar_icon_size);
+        float iconScale = taskbarIconSize / mDeviceProfile.iconSizePx;
+        mDeviceProfile.updateIconSize(iconScale, getResources());
+
+        mLayoutInflater = LayoutInflater.from(this).cloneInContext(this);
+
+        mTaskbarContainerView = (TaskbarContainerView) mLayoutInflater
+                .inflate(R.layout.taskbar, null, false);
+    }
+
+    public TaskbarContainerView getTaskbarContainerView() {
+        return mTaskbarContainerView;
+    }
+
+    /**
+     * @return A LayoutInflater to use in this Context. Views inflated with this LayoutInflater will
+     * be able to access this TaskbarActivityContext via ActivityContext.lookupContext().
+     */
+    public LayoutInflater getLayoutInflater() {
+        return mLayoutInflater;
+    }
+
+    @Override
+    public BaseDragLayer<TaskbarActivityContext> getDragLayer() {
+        return mTaskbarContainerView;
+    }
+
+    @Override
+    public DeviceProfile getDeviceProfile() {
+        return mDeviceProfile;
+    }
+
+    @Override
+    public Rect getFolderBoundingBox() {
+        return mTaskbarContainerView.getFolderBoundingBox();
+    }
+}
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarContainerView.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarContainerView.java
index 3b361c4..ddd0d15 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarContainerView.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarContainerView.java
@@ -19,19 +19,29 @@
 import static com.android.systemui.shared.system.ViewTreeObserverWrapper.InsetsInfo.TOUCHABLE_INSETS_REGION;
 
 import android.content.Context;
+import android.graphics.Rect;
 import android.util.AttributeSet;
-import android.widget.FrameLayout;
+import android.view.View;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 
+import com.android.launcher3.R;
 import com.android.launcher3.anim.AlphaUpdateListener;
+import com.android.launcher3.util.TouchController;
+import com.android.launcher3.views.BaseDragLayer;
 import com.android.systemui.shared.system.ViewTreeObserverWrapper;
 
 /**
  * Top-level ViewGroup that hosts the TaskbarView as well as Views created by it such as Folder.
  */
-public class TaskbarContainerView extends FrameLayout {
+public class TaskbarContainerView extends BaseDragLayer<TaskbarActivityContext> {
+
+    private final int[] mTempLoc = new int[2];
+    private final int mFolderMargin;
+
+    // Initialized in TaskbarController constructor.
+    private TaskbarController.TaskbarContainerViewCallbacks mControllerCallbacks;
 
     // Initialized in init.
     private TaskbarView mTaskbarView;
@@ -52,12 +62,23 @@
 
     public TaskbarContainerView(@NonNull Context context, @Nullable AttributeSet attrs,
             int defStyleAttr, int defStyleRes) {
-        super(context, attrs, defStyleAttr, defStyleRes);
+        super(context, attrs, 1 /* alphaChannelCount */);
+        mFolderMargin = getResources().getDimensionPixelSize(R.dimen.taskbar_folder_margin);
+    }
+
+    protected void construct(TaskbarController.TaskbarContainerViewCallbacks callbacks) {
+        mControllerCallbacks = callbacks;
     }
 
     protected void init(TaskbarView taskbarView) {
         mTaskbarView = taskbarView;
         mTaskbarInsetsComputer = createTaskbarInsetsComputer();
+        recreateControllers();
+    }
+
+    @Override
+    public void recreateControllers() {
+        mControllers = new TouchController[0];
     }
 
     private ViewTreeObserverWrapper.OnComputeInsetsListener createTaskbarInsetsComputer() {
@@ -70,6 +91,17 @@
                  // We're visible again, accept touches anywhere in our bounds.
                 insetsInfo.setTouchableInsets(TOUCHABLE_INSETS_FRAME);
             }
+
+            // TaskbarContainerView provides insets to other apps based on contentInsets. These
+            // insets should stay consistent even if we expand TaskbarContainerView's bounds, e.g.
+            // to show a floating view like Folder. Thus, we set the contentInsets to be where
+            // mTaskbarView is, since its position never changes and insets rather than overlays.
+            int[] loc = mTempLoc;
+            mTaskbarView.getLocationInWindow(loc);
+            insetsInfo.contentInsets.left = loc[0];
+            insetsInfo.contentInsets.top = loc[1];
+            insetsInfo.contentInsets.right = getWidth() - (loc[0] + mTaskbarView.getWidth());
+            insetsInfo.contentInsets.bottom = getHeight() - (loc[1] + mTaskbarView.getHeight());
         };
     }
 
@@ -91,4 +123,30 @@
 
         cleanup();
     }
+
+    @Override
+    protected boolean canFindActiveController() {
+        // Unlike super class, we want to be able to find controllers when touches occur in the
+        // gesture area. For example, this allows Folder to close itself when touching the Taskbar.
+        return true;
+    }
+
+    @Override
+    public void onViewRemoved(View child) {
+        super.onViewRemoved(child);
+        mControllerCallbacks.onViewRemoved();
+    }
+
+    /**
+     * @return Bounds (in our coordinates) where an opened Folder can display.
+     */
+    protected Rect getFolderBoundingBox() {
+        Rect boundingBox = new Rect(0, 0, getWidth(), getHeight() - mTaskbarView.getHeight());
+        boundingBox.inset(mFolderMargin, mFolderMargin);
+        return boundingBox;
+    }
+
+    protected TaskbarActivityContext getTaskbarActivityContext() {
+        return mActivity;
+    }
 }
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarController.java
index 260428d..ab05fbf 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarController.java
@@ -34,11 +34,15 @@
 
 import androidx.annotation.Nullable;
 
+import com.android.launcher3.AbstractFloatingView;
 import com.android.launcher3.BaseQuickstepLauncher;
 import com.android.launcher3.LauncherState;
 import com.android.launcher3.QuickstepAppTransitionManagerImpl;
 import com.android.launcher3.R;
 import com.android.launcher3.anim.PendingAnimation;
+import com.android.launcher3.folder.Folder;
+import com.android.launcher3.folder.FolderIcon;
+import com.android.launcher3.model.data.FolderInfo;
 import com.android.launcher3.model.data.ItemInfo;
 import com.android.launcher3.states.StateAnimationConfig;
 import com.android.launcher3.touch.ItemClickHandler;
@@ -81,8 +85,9 @@
             TaskbarContainerView taskbarContainerView) {
         mLauncher = launcher;
         mTaskbarContainerView = taskbarContainerView;
+        mTaskbarContainerView.construct(createTaskbarContainerViewCallbacks());
         mTaskbarView = mTaskbarContainerView.findViewById(R.id.taskbar_view);
-        mTaskbarView.setCallbacks(createTaskbarViewCallbacks());
+        mTaskbarView.construct(createTaskbarViewCallbacks());
         mWindowManager = mLauncher.getWindowManager();
         mTaskbarSize = new Point(MATCH_PARENT,
                 mLauncher.getResources().getDimensionPixelSize(R.dimen.taskbar_size));
@@ -110,6 +115,18 @@
         };
     }
 
+    private TaskbarContainerViewCallbacks createTaskbarContainerViewCallbacks() {
+        return new TaskbarContainerViewCallbacks() {
+            @Override
+            public void onViewRemoved() {
+                if (mTaskbarContainerView.getChildCount() == 1) {
+                    // Only TaskbarView remains.
+                    setTaskbarWindowFullscreen(false);
+                }
+            }
+        };
+    }
+
     private TaskbarViewCallbacks createTaskbarViewCallbacks() {
         return new TaskbarViewCallbacks() {
             @Override
@@ -120,9 +137,29 @@
                         Task task = (Task) tag;
                         ActivityManagerWrapper.getInstance().startActivityFromRecents(task.key,
                                 ActivityOptions.makeBasic());
+                    } else if (tag instanceof FolderInfo) {
+                        FolderIcon folderIcon = (FolderIcon) view;
+                        Folder folder = folderIcon.getFolder();
+
+                        setTaskbarWindowFullscreen(true);
+
+                        mTaskbarContainerView.post(() -> {
+                            folder.animateOpen();
+
+                            folder.iterateOverItems((itemInfo, itemView) -> {
+                                itemView.setOnClickListener(getItemOnClickListener());
+                                itemView.setOnLongClickListener(getItemOnLongClickListener());
+                                // To play haptic when dragging, like other Taskbar items do.
+                                itemView.setHapticFeedbackEnabled(true);
+                                return false;
+                            });
+                        });
                     } else {
                         ItemClickHandler.INSTANCE.onClick(view);
                     }
+
+                    AbstractFloatingView.closeAllOpenViews(
+                            mTaskbarContainerView.getTaskbarActivityContext());
                 };
             }
 
@@ -345,6 +382,20 @@
     }
 
     /**
+     * Updates the TaskbarContainer to MATCH_PARENT vs original Taskbar size.
+     */
+    private void setTaskbarWindowFullscreen(boolean fullscreen) {
+        if (fullscreen) {
+            mWindowLayoutParams.width = MATCH_PARENT;
+            mWindowLayoutParams.height = MATCH_PARENT;
+        } else {
+            mWindowLayoutParams.width = mTaskbarSize.x;
+            mWindowLayoutParams.height = mTaskbarSize.y;
+        }
+        mWindowManager.updateViewLayout(mTaskbarContainerView, mWindowLayoutParams);
+    }
+
+    /**
      * Contains methods that TaskbarStateHandler can call to interface with TaskbarController.
      */
     protected interface TaskbarStateHandlerCallbacks {
@@ -361,6 +412,13 @@
     }
 
     /**
+     * Contains methods that TaskbarContainerView can call to interface with TaskbarController.
+     */
+    protected interface TaskbarContainerViewCallbacks {
+        void onViewRemoved();
+    }
+
+    /**
      * Contains methods that TaskbarView can call to interface with TaskbarController.
      */
     protected interface TaskbarViewCallbacks {
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java
index d8f3bb5..7a13b89 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java
@@ -17,12 +17,12 @@
 
 import android.content.Context;
 import android.content.res.Resources;
+import android.graphics.Canvas;
 import android.graphics.RectF;
 import android.graphics.drawable.ColorDrawable;
 import android.graphics.drawable.Drawable;
 import android.util.AttributeSet;
 import android.view.DragEvent;
-import android.view.LayoutInflater;
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.ViewConfiguration;
@@ -32,16 +32,20 @@
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 
+import com.android.launcher3.AbstractFloatingView;
 import com.android.launcher3.BubbleTextView;
 import com.android.launcher3.R;
+import com.android.launcher3.folder.FolderIcon;
+import com.android.launcher3.model.data.FolderInfo;
 import com.android.launcher3.model.data.ItemInfo;
 import com.android.launcher3.model.data.WorkspaceItemInfo;
+import com.android.launcher3.views.ActivityContext;
 import com.android.systemui.shared.recents.model.Task;
 
 /**
  * Hosts the Taskbar content such as Hotseat and Recent Apps. Drawn on top of other apps.
  */
-public class TaskbarView extends LinearLayout {
+public class TaskbarView extends LinearLayout implements FolderIcon.FolderIconParent {
 
     private final ColorDrawable mBackgroundDrawable;
     private final int mItemMarginLeftRight;
@@ -51,6 +55,9 @@
     private final RectF mDelegateSlopBounds = new RectF();
     private final int[] mTempOutLocation = new int[2];
 
+    // Initialized in TaskbarController constructor.
+    private TaskbarController.TaskbarViewCallbacks mControllerCallbacks;
+
     // Initialized in init().
     private int mHotseatStartIndex;
     private int mHotseatEndIndex;
@@ -58,13 +65,13 @@
     private int mRecentsStartIndex;
     private int mRecentsEndIndex;
 
-    private TaskbarController.TaskbarViewCallbacks mControllerCallbacks;
-
     // Delegate touches to the closest view if within mIconTouchSize.
     private boolean mDelegateTargeted;
     private View mDelegateView;
 
     private boolean mIsDraggingItem;
+    // Only non-null when the corresponding Folder is open.
+    private @Nullable FolderIcon mLeaveBehindFolderIcon;
 
     public TaskbarView(@NonNull Context context) {
         this(context, null);
@@ -90,7 +97,7 @@
         mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();
     }
 
-    protected void setCallbacks(TaskbarController.TaskbarViewCallbacks taskbarViewCallbacks) {
+    protected void construct(TaskbarController.TaskbarViewCallbacks taskbarViewCallbacks) {
         mControllerCallbacks = taskbarViewCallbacks;
     }
 
@@ -130,17 +137,37 @@
 
             // Replace any Hotseat views with the appropriate type if it's not already that type.
             final int expectedLayoutResId;
+            boolean isFolder = false;
+            boolean needsReinflate = false;
             if (hotseatItemInfo != null && hotseatItemInfo.isPredictedItem()) {
                 expectedLayoutResId = R.layout.taskbar_predicted_app_icon;
+            } else if (hotseatItemInfo instanceof FolderInfo) {
+                expectedLayoutResId = R.layout.folder_icon;
+                isFolder = true;
+                // Unlike for BubbleTextView, we can't reapply a new FolderInfo after inflation, so
+                // if the info changes we need to reinflate. This should only happen if a new folder
+                // is dragged to the position that another folder previously existed.
+                needsReinflate = hotseatView != null && hotseatView.getTag() != hotseatItemInfo;
             } else {
                 expectedLayoutResId = R.layout.taskbar_app_icon;
             }
-            if (hotseatView == null || hotseatView.getSourceLayoutResId() != expectedLayoutResId) {
+            if (hotseatView == null || hotseatView.getSourceLayoutResId() != expectedLayoutResId
+                    || needsReinflate) {
                 removeView(hotseatView);
-                BubbleTextView btv = (BubbleTextView) inflate(expectedLayoutResId);
-                LayoutParams lp = new LayoutParams(btv.getIconSize(), btv.getIconSize());
+                TaskbarActivityContext activityContext =
+                        ActivityContext.lookupContext(getContext());
+                if (isFolder) {
+                    FolderInfo folderInfo = (FolderInfo) hotseatItemInfo;
+                    FolderIcon folderIcon = FolderIcon.inflateFolderAndIcon(expectedLayoutResId,
+                            activityContext, this, folderInfo);
+                    folderIcon.setTextVisible(false);
+                    hotseatView = folderIcon;
+                } else {
+                    hotseatView = inflate(expectedLayoutResId);
+                }
+                int iconSize = activityContext.getDeviceProfile().iconSizePx;
+                LayoutParams lp = new LayoutParams(iconSize, iconSize);
                 lp.setMargins(mItemMarginLeftRight, 0, mItemMarginLeftRight, 0);
-                hotseatView = btv;
                 addView(hotseatView, hotseatIndex, lp);
             }
 
@@ -153,6 +180,11 @@
                 hotseatView.setOnClickListener(mControllerCallbacks.getItemOnClickListener());
                 hotseatView.setOnLongClickListener(
                         mControllerCallbacks.getItemOnLongClickListener());
+            } else if (isFolder) {
+                hotseatView.setVisibility(VISIBLE);
+                hotseatView.setOnClickListener(mControllerCallbacks.getItemOnClickListener());
+                hotseatView.setOnLongClickListener(
+                        mControllerCallbacks.getItemOnLongClickListener());
             } else {
                 hotseatView.setVisibility(GONE);
                 hotseatView.setOnClickListener(null);
@@ -345,6 +377,7 @@
         switch (event.getAction()) {
             case DragEvent.ACTION_DRAG_STARTED:
                 mIsDraggingItem = true;
+                AbstractFloatingView.closeAllOpenViews(ActivityContext.lookupContext(getContext()));
                 return true;
             case DragEvent.ACTION_DRAG_ENDED:
                 mIsDraggingItem = false;
@@ -357,7 +390,35 @@
         return mIsDraggingItem;
     }
 
+    // FolderIconParent implemented methods.
+
+    @Override
+    public void drawFolderLeaveBehindForIcon(FolderIcon child) {
+        mLeaveBehindFolderIcon = child;
+        invalidate();
+    }
+
+    @Override
+    public void clearFolderLeaveBehind(FolderIcon child) {
+        mLeaveBehindFolderIcon = null;
+        invalidate();
+    }
+
+    // End FolderIconParent implemented methods.
+
+    @Override
+    protected void onDraw(Canvas canvas) {
+        super.onDraw(canvas);
+        if (mLeaveBehindFolderIcon != null) {
+            canvas.save();
+            canvas.translate(mLeaveBehindFolderIcon.getLeft(), mLeaveBehindFolderIcon.getTop());
+            mLeaveBehindFolderIcon.getFolderBackground().drawLeaveBehind(canvas);
+            canvas.restore();
+        }
+    }
+
     private View inflate(@LayoutRes int layoutResId) {
-        return LayoutInflater.from(getContext()).inflate(layoutResId, this, false);
+        TaskbarActivityContext taskbarActivityContext = ActivityContext.lookupContext(getContext());
+        return taskbarActivityContext.getLayoutInflater().inflate(layoutResId, this, false);
     }
 }
diff --git a/quickstep/tests/src/com/android/quickstep/NavigationModeSwitchRule.java b/quickstep/tests/src/com/android/quickstep/NavigationModeSwitchRule.java
index 0f6671d..35383d2 100644
--- a/quickstep/tests/src/com/android/quickstep/NavigationModeSwitchRule.java
+++ b/quickstep/tests/src/com/android/quickstep/NavigationModeSwitchRule.java
@@ -168,7 +168,7 @@
 
         Log.d(TAG, "setActiveOverlay: " + overlayPackage + "...");
         UiDevice.getInstance(getInstrumentation()).executeShellCommand(
-                "cmd overlay enable-exclusive " + overlayPackage);
+                "cmd overlay enable-exclusive --category " + overlayPackage);
 
         if (currentSysUiNavigationMode() != expectedMode) {
             final CountDownLatch latch = new CountDownLatch(1);
diff --git a/src/com/android/launcher3/BaseActivity.java b/src/com/android/launcher3/BaseActivity.java
index 8a03fac..062ab71 100644
--- a/src/com/android/launcher3/BaseActivity.java
+++ b/src/com/android/launcher3/BaseActivity.java
@@ -31,7 +31,6 @@
 import android.os.Bundle;
 import android.os.UserHandle;
 import android.util.Log;
-import android.view.ContextThemeWrapper;
 
 import androidx.annotation.IntDef;
 
@@ -333,7 +332,7 @@
     public static <T extends BaseActivity> T fromContext(Context context) {
         if (context instanceof BaseActivity) {
             return (T) context;
-        } else if (context instanceof ContextThemeWrapper) {
+        } else if (context instanceof ContextWrapper) {
             return fromContext(((ContextWrapper) context).getBaseContext());
         } else {
             throw new IllegalArgumentException("Cannot find BaseActivity in parent tree");
diff --git a/src/com/android/launcher3/BubbleTextView.java b/src/com/android/launcher3/BubbleTextView.java
index edc7e9b..e5a4335 100644
--- a/src/com/android/launcher3/BubbleTextView.java
+++ b/src/com/android/launcher3/BubbleTextView.java
@@ -505,7 +505,7 @@
      * @param canvas The canvas to draw to.
      */
     protected void drawDotIfNecessary(Canvas canvas) {
-        if (mDisplay == DISPLAY_TASKBAR) {
+        if (mActivity instanceof Launcher && ((Launcher) mActivity).isViewInTaskbar(this)) {
             // TODO: support notification dots in Taskbar
             return;
         }
diff --git a/src/com/android/launcher3/DeviceProfile.java b/src/com/android/launcher3/DeviceProfile.java
index 19915b7..83a7d77 100644
--- a/src/com/android/launcher3/DeviceProfile.java
+++ b/src/com/android/launcher3/DeviceProfile.java
@@ -375,7 +375,7 @@
      * iconTextSizePx, iconDrawablePaddingPx, cellWidth/Height, allApps* variants,
      * hotseat sizes, workspaceSpringLoadedShrinkFactor, folderIconSizePx, and folderIconOffsetYPx.
      */
-    private void updateIconSize(float scale, Resources res) {
+    public void updateIconSize(float scale, Resources res) {
         // Workspace
         final boolean isVerticalLayout = isVerticalBarLayout();
         float invIconSizeDp = isVerticalLayout ? inv.landscapeIconSize : inv.iconSize;
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 51e7c7d..1d6301b 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -74,6 +74,7 @@
 import android.content.res.Configuration;
 import android.database.sqlite.SQLiteDatabase;
 import android.graphics.Bitmap;
+import android.graphics.Rect;
 import android.os.Build;
 import android.os.Bundle;
 import android.os.CancellationSignal;
@@ -1797,6 +1798,43 @@
         return newFolder;
     }
 
+    @Override
+    public Rect getFolderBoundingBox() {
+        // We need to bound the folder to the currently visible workspace area
+        Rect folderBoundingBox = new Rect();
+        getWorkspace().getPageAreaRelativeToDragLayer(folderBoundingBox);
+        return folderBoundingBox;
+    }
+
+    @Override
+    public void updateOpenFolderPosition(int[] inOutPosition, Rect bounds, int width, int height) {
+        int left = inOutPosition[0];
+        int top = inOutPosition[1];
+        DeviceProfile grid = getDeviceProfile();
+        int distFromEdgeOfScreen = getWorkspace().getPaddingLeft();
+        if (grid.isPhone && (grid.availableWidthPx - width) < 4 * distFromEdgeOfScreen) {
+            // Center the folder if it is very close to being centered anyway, by virtue of
+            // filling the majority of the viewport. ie. remove it from the uncanny valley
+            // of centeredness.
+            left = (grid.availableWidthPx - width) / 2;
+        } else if (width >= bounds.width()) {
+            // If the folder doesn't fit within the bounds, center it about the desired bounds
+            left = bounds.left + (bounds.width() - width) / 2;
+        }
+        if (height >= bounds.height()) {
+            // Folder height is greater than page height, center on page
+            top = bounds.top + (bounds.height() - height) / 2;
+        } else {
+            // Folder height is less than page height, so bound it to the absolute open folder
+            // bounds if necessary
+            Rect folderBounds = grid.getAbsoluteOpenFolderBounds();
+            left = Math.max(folderBounds.left, Math.min(left, folderBounds.right - width));
+            top = Math.max(folderBounds.top, Math.min(top, folderBounds.bottom - height));
+        }
+        inOutPosition[0] = left;
+        inOutPosition[1] = top;
+    }
+
     /**
      * Unbinds the view for the specified item, and removes the item and all its children.
      *
diff --git a/src/com/android/launcher3/ShortcutAndWidgetContainer.java b/src/com/android/launcher3/ShortcutAndWidgetContainer.java
index 1c5081c..eab8272 100644
--- a/src/com/android/launcher3/ShortcutAndWidgetContainer.java
+++ b/src/com/android/launcher3/ShortcutAndWidgetContainer.java
@@ -26,10 +26,11 @@
 import android.view.ViewGroup;
 
 import com.android.launcher3.CellLayout.ContainerType;
+import com.android.launcher3.folder.FolderIcon;
 import com.android.launcher3.views.ActivityContext;
 import com.android.launcher3.widget.LauncherAppWidgetHostView;
 
-public class ShortcutAndWidgetContainer extends ViewGroup {
+public class ShortcutAndWidgetContainer extends ViewGroup implements FolderIcon.FolderIconParent {
     static final String TAG = "ShortcutAndWidgetContainer";
 
     // These are temporary variables to prevent having to allocate a new object just to
@@ -228,4 +229,24 @@
             child.cancelLongPress();
         }
     }
+
+    @Override
+    public void drawFolderLeaveBehindForIcon(FolderIcon child) {
+        CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams();
+        // While the folder is open, the position of the icon cannot change.
+        lp.canReorder = false;
+        if (mContainerType == CellLayout.HOTSEAT) {
+            CellLayout cl = (CellLayout) getParent();
+            cl.setFolderLeaveBehindCell(lp.cellX, lp.cellY);
+        }
+    }
+
+    @Override
+    public void clearFolderLeaveBehind(FolderIcon child) {
+        ((CellLayout.LayoutParams) child.getLayoutParams()).canReorder = true;
+        if (mContainerType == CellLayout.HOTSEAT) {
+            CellLayout cl = (CellLayout) getParent();
+            cl.clearFolderLeaveBehind();
+        }
+    }
 }
diff --git a/src/com/android/launcher3/allapps/AllAppsStore.java b/src/com/android/launcher3/allapps/AllAppsStore.java
index 769cb5e..355ccad 100644
--- a/src/com/android/launcher3/allapps/AllAppsStore.java
+++ b/src/com/android/launcher3/allapps/AllAppsStore.java
@@ -21,6 +21,8 @@
 import android.view.View;
 import android.view.ViewGroup;
 
+import androidx.annotation.Nullable;
+
 import com.android.launcher3.BubbleTextView;
 import com.android.launcher3.model.data.AppInfo;
 import com.android.launcher3.model.data.ItemInfo;
@@ -78,6 +80,11 @@
         return (mModelFlags & mask) != 0;
     }
 
+    /**
+     * Returns {@link AppInfo} if any apps matches with provided {@link ComponentKey}, otherwise
+     * null.
+     */
+    @Nullable
     public AppInfo getApp(ComponentKey key) {
         mTempInfo.componentName = key.componentName;
         mTempInfo.user = key.user;
diff --git a/src/com/android/launcher3/folder/Folder.java b/src/com/android/launcher3/folder/Folder.java
index 74d8dca..504b29e 100644
--- a/src/com/android/launcher3/folder/Folder.java
+++ b/src/com/android/launcher3/folder/Folder.java
@@ -46,6 +46,7 @@
 import android.util.Pair;
 import android.view.FocusFinder;
 import android.view.KeyEvent;
+import android.view.LayoutInflater;
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.ViewDebug;
@@ -82,7 +83,6 @@
 import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.dragndrop.DragController;
 import com.android.launcher3.dragndrop.DragController.DragListener;
-import com.android.launcher3.dragndrop.DragLayer;
 import com.android.launcher3.dragndrop.DragOptions;
 import com.android.launcher3.logger.LauncherAtom.FromState;
 import com.android.launcher3.logger.LauncherAtom.ToState;
@@ -96,6 +96,8 @@
 import com.android.launcher3.pageindicators.PageIndicatorDots;
 import com.android.launcher3.util.Executors;
 import com.android.launcher3.util.Thunk;
+import com.android.launcher3.views.ActivityContext;
+import com.android.launcher3.views.BaseDragLayer;
 import com.android.launcher3.views.ClipPathView;
 import com.android.launcher3.widget.PendingAddShortcutInfo;
 
@@ -165,7 +167,11 @@
     private AnimatorSet mCurrentAnimator;
     private boolean mIsAnimatingClosed = false;
 
+    // Folder can be displayed in Launcher's activity or a separate window (e.g. Taskbar).
+    // Anything specific to Launcher should use mLauncher, otherwise should use mActivityContext.
     protected final Launcher mLauncher;
+    protected final ActivityContext mActivityContext;
+
     protected DragController mDragController;
     public FolderInfo mInfo;
     private CharSequence mFromTitle;
@@ -228,6 +234,7 @@
         setAlwaysDrawnWithCacheEnabled(false);
 
         mLauncher = Launcher.getLauncher(context);
+        mActivityContext = ActivityContext.lookupContext(context);
         mStatsLogManager = StatsLogManager.newInstance(context);
         // We need this view to be focusable in touch mode so that when text editing of the folder
         // name is complete, we have something to focus on, thus hiding the cursor and giving
@@ -457,9 +464,9 @@
         Collections.sort(children, ITEM_POS_COMPARATOR);
         updateItemLocationsInDatabaseBatch(true);
 
-        DragLayer.LayoutParams lp = (DragLayer.LayoutParams) getLayoutParams();
+        BaseDragLayer.LayoutParams lp = (BaseDragLayer.LayoutParams) getLayoutParams();
         if (lp == null) {
-            lp = new DragLayer.LayoutParams(0, 0);
+            lp = new BaseDragLayer.LayoutParams(0, 0);
             lp.customPosition = true;
             setLayoutParams(lp);
         }
@@ -513,13 +520,14 @@
     /**
      * Creates a new UserFolder, inflated from R.layout.user_folder.
      *
-     * @param launcher The main activity.
+     * @param activityContext The main ActivityContext in which to inflate this Folder. It must also
+     *                        be an instance or ContextWrapper around the Launcher activity context.
      *
      * @return A new UserFolder.
      */
     @SuppressLint("InflateParams")
-    static Folder fromXml(Launcher launcher) {
-        return (Folder) launcher.getLayoutInflater()
+    static <T extends Context & ActivityContext> Folder fromXml(T activityContext) {
+        return (Folder) LayoutInflater.from(activityContext).cloneInContext(activityContext)
                 .inflate(R.layout.user_folder_icon_normalized, null);
     }
 
@@ -597,7 +605,7 @@
      * is played.
      */
     private void animateOpen(List<WorkspaceItemInfo> items, int pageNo) {
-        Folder openFolder = getOpen(mLauncher);
+        Folder openFolder = getOpen(mActivityContext);
         if (openFolder != null && openFolder != this) {
             // Close any open folder before opening a folder.
             openFolder.close(true);
@@ -610,7 +618,7 @@
 
         mIsOpen = true;
 
-        DragLayer dragLayer = mLauncher.getDragLayer();
+        BaseDragLayer dragLayer = mActivityContext.getDragLayer();
         // Just verify that the folder hasn't already been added to the DragLayer.
         // There was a one-off crash where the folder had a parent already.
         if (getParent() == null) {
@@ -724,7 +732,7 @@
 
         // Notify the accessibility manager that this folder "window" has disappeared and no
         // longer occludes the workspace items
-        mLauncher.getDragLayer().sendAccessibilityEvent(
+        mActivityContext.getDragLayer().sendAccessibilityEvent(
                 AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED);
     }
 
@@ -772,7 +780,7 @@
 
     private void closeComplete(boolean wasAnimated) {
         // TODO: Clear all active animations.
-        DragLayer parent = (DragLayer) getParent();
+        BaseDragLayer parent = (BaseDragLayer) getParent();
         if (parent != null) {
             parent.removeView(this);
         }
@@ -1011,7 +1019,7 @@
 
     private void updateItemLocationsInDatabaseBatch(boolean isBind) {
         FolderGridOrganizer verifier = new FolderGridOrganizer(
-                mLauncher.getDeviceProfile().inv).setFolderInfo(mInfo);
+                mActivityContext.getDeviceProfile().inv).setFolderInfo(mInfo);
 
         ArrayList<ItemInfo> items = new ArrayList<>();
         int total = mInfo.contents.size();
@@ -1048,10 +1056,8 @@
     }
 
     private void centerAboutIcon() {
-        DeviceProfile grid = mLauncher.getDeviceProfile();
-
-        DragLayer.LayoutParams lp = (DragLayer.LayoutParams) getLayoutParams();
-        DragLayer parent = mLauncher.getDragLayer();
+        BaseDragLayer.LayoutParams lp = (BaseDragLayer.LayoutParams) getLayoutParams();
+        BaseDragLayer parent = mActivityContext.getDragLayer();
         int width = getFolderWidth();
         int height = getFolderHeight();
 
@@ -1061,38 +1067,13 @@
         int centeredLeft = centerX - width / 2;
         int centeredTop = centerY - height / 2;
 
-        // We need to bound the folder to the currently visible workspace area
-        if (mLauncher.getStateManager().getState().overviewUi) {
-            parent.getDescendantRectRelativeToSelf(mLauncher.getOverviewPanel(), sTempRect);
-        } else {
-            mLauncher.getWorkspace().getPageAreaRelativeToDragLayer(sTempRect);
-        }
-        int left = Math.min(Math.max(sTempRect.left, centeredLeft),
-                sTempRect.right- width);
-        int top = Math.min(Math.max(sTempRect.top, centeredTop),
-                sTempRect.bottom - height);
-
-        int distFromEdgeOfScreen = mLauncher.getWorkspace().getPaddingLeft() + getPaddingLeft();
-
-        if (grid.isPhone && (grid.availableWidthPx - width) < 4 * distFromEdgeOfScreen) {
-            // Center the folder if it is very close to being centered anyway, by virtue of
-            // filling the majority of the viewport. ie. remove it from the uncanny valley
-            // of centeredness.
-            left = (grid.availableWidthPx - width) / 2;
-        } else if (width >= sTempRect.width()) {
-            // If the folder doesn't fit within the bounds, center it about the desired bounds
-            left = sTempRect.left + (sTempRect.width() - width) / 2;
-        }
-        if (height >= sTempRect.height()) {
-            // Folder height is greater than page height, center on page
-            top = sTempRect.top + (sTempRect.height() - height) / 2;
-        } else {
-            // Folder height is less than page height, so bound it to the absolute open folder
-            // bounds if necessary
-            Rect folderBounds = grid.getAbsoluteOpenFolderBounds();
-            left = Math.max(folderBounds.left, Math.min(left, folderBounds.right - width));
-            top = Math.max(folderBounds.top, Math.min(top, folderBounds.bottom - height));
-        }
+        sTempRect.set(mActivityContext.getFolderBoundingBox());
+        int left = Utilities.boundToRange(centeredLeft, sTempRect.left, sTempRect.right - width);
+        int top = Utilities.boundToRange(centeredTop, sTempRect.top, sTempRect.bottom - height);
+        int[] inOutPosition = new int[] {left, top};
+        mActivityContext.updateOpenFolderPosition(inOutPosition, sTempRect, width, height);
+        left = inOutPosition[0];
+        top = inOutPosition[1];
 
         int folderPivotX = width / 2 + (centeredLeft - left);
         int folderPivotY = height / 2 + (centeredTop - top);
@@ -1106,7 +1087,7 @@
     }
 
     protected int getContentAreaHeight() {
-        DeviceProfile grid = mLauncher.getDeviceProfile();
+        DeviceProfile grid = mActivityContext.getDeviceProfile();
         int maxContentAreaHeight = grid.availableHeightPx - grid.getTotalWorkspacePadding().y
                 - mFooterHeight;
         int height = Math.min(maxContentAreaHeight,
@@ -1384,7 +1365,7 @@
     @Override
     public void onAdd(WorkspaceItemInfo item, int rank) {
         FolderGridOrganizer verifier = new FolderGridOrganizer(
-                mLauncher.getDeviceProfile().inv).setFolderInfo(mInfo);
+                mActivityContext.getDeviceProfile().inv).setFolderInfo(mInfo);
         verifier.updateRankAndPos(item, rank);
         mLauncher.getModelWriter().addOrMoveItemInDatabase(item, mInfo.id, 0, item.cellX,
                 item.cellY);
@@ -1591,8 +1572,8 @@
     /**
      * Returns a folder which is already open or null
      */
-    public static Folder getOpen(Launcher launcher) {
-        return getOpenView(launcher, TYPE_FOLDER);
+    public static Folder getOpen(ActivityContext activityContext) {
+        return getOpenView(activityContext, TYPE_FOLDER);
     }
 
     /**
@@ -1611,7 +1592,7 @@
     @Override
     public boolean onControllerInterceptTouchEvent(MotionEvent ev) {
         if (ev.getAction() == MotionEvent.ACTION_DOWN) {
-            DragLayer dl = mLauncher.getDragLayer();
+            BaseDragLayer dl = (BaseDragLayer) getParent();
 
             if (isEditingName()) {
                 if (!dl.isEventOverView(mFolderName, ev)) {
@@ -1635,6 +1616,11 @@
         return false;
     }
 
+    @Override
+    public boolean canInterceptEventsInSystemGestureRegion() {
+        return true;
+    }
+
     /**
      * Alternative to using {@link #getClipToOutline()} as it only works with derivatives of
      * rounded rect.
@@ -1663,9 +1649,9 @@
 
     /** Returns the height of the current folder's bottom edge from the bottom of the screen. */
     private int getHeightFromBottom() {
-        DragLayer.LayoutParams layoutParams = (DragLayer.LayoutParams) getLayoutParams();
+        BaseDragLayer.LayoutParams layoutParams = (BaseDragLayer.LayoutParams) getLayoutParams();
         int folderBottomPx = layoutParams.y + layoutParams.height;
-        int windowBottomPx = mLauncher.getDeviceProfile().heightPx;
+        int windowBottomPx = mActivityContext.getDeviceProfile().heightPx;
 
         return windowBottomPx - folderBottomPx;
     }
diff --git a/src/com/android/launcher3/folder/FolderAnimationManager.java b/src/com/android/launcher3/folder/FolderAnimationManager.java
index 3d72b49..1cac31e 100644
--- a/src/com/android/launcher3/folder/FolderAnimationManager.java
+++ b/src/com/android/launcher3/folder/FolderAnimationManager.java
@@ -39,14 +39,13 @@
 
 import com.android.launcher3.BubbleTextView;
 import com.android.launcher3.CellLayout;
-import com.android.launcher3.Launcher;
 import com.android.launcher3.R;
 import com.android.launcher3.ResourceUtils;
 import com.android.launcher3.ShortcutAndWidgetContainer;
 import com.android.launcher3.Utilities;
 import com.android.launcher3.anim.PropertyResetListener;
-import com.android.launcher3.dragndrop.DragLayer;
 import com.android.launcher3.util.Themes;
+import com.android.launcher3.views.BaseDragLayer;
 
 import java.util.List;
 
@@ -69,7 +68,6 @@
     private PreviewBackground mPreviewBackground;
 
     private Context mContext;
-    private Launcher mLauncher;
 
     private final boolean mIsOpening;
 
@@ -92,8 +90,7 @@
         mPreviewBackground = mFolderIcon.mBackground;
 
         mContext = folder.getContext();
-        mLauncher = folder.mLauncher;
-        mPreviewVerifier = new FolderGridOrganizer(mLauncher.getDeviceProfile().inv);
+        mPreviewVerifier = new FolderGridOrganizer(folder.mActivityContext.getDeviceProfile().inv);
 
         mIsOpening = isOpening;
 
@@ -114,14 +111,15 @@
      * Prepares the Folder for animating between open / closed states.
      */
     public AnimatorSet getAnimator() {
-        final DragLayer.LayoutParams lp = (DragLayer.LayoutParams) mFolder.getLayoutParams();
+        final BaseDragLayer.LayoutParams lp =
+                (BaseDragLayer.LayoutParams) mFolder.getLayoutParams();
         mFolderIcon.getPreviewItemManager().recomputePreviewDrawingParams();
         ClippedFolderIconLayoutRule rule = mFolderIcon.getLayoutRule();
         final List<BubbleTextView> itemsInPreview = getPreviewIconsOnPage(0);
 
         // Match position of the FolderIcon
         final Rect folderIconPos = new Rect();
-        float scaleRelativeToDragLayer = mLauncher.getDragLayer()
+        float scaleRelativeToDragLayer = mFolder.mActivityContext.getDragLayer()
                 .getDescendantRectRelativeToSelf(mFolderIcon, folderIconPos);
         int scaledRadius = mPreviewBackground.getScaledRadius();
         float initialSize = (scaledRadius * 2) * scaleRelativeToDragLayer;
diff --git a/src/com/android/launcher3/folder/FolderIcon.java b/src/com/android/launcher3/folder/FolderIcon.java
index 6477de3..6b02021 100644
--- a/src/com/android/launcher3/folder/FolderIcon.java
+++ b/src/com/android/launcher3/folder/FolderIcon.java
@@ -166,19 +166,19 @@
         mDotParams = new DotRenderer.DrawParams();
     }
 
-    public static FolderIcon inflateFolderAndIcon(int resId, Launcher launcher, ViewGroup group,
-            FolderInfo folderInfo) {
-        Folder folder = Folder.fromXml(launcher);
-        folder.setDragController(launcher.getDragController());
+    public static <T extends Context & ActivityContext> FolderIcon inflateFolderAndIcon(int resId,
+            T activityContext, ViewGroup group, FolderInfo folderInfo) {
+        Folder folder = Folder.fromXml(activityContext);
+        folder.setDragController(folder.mLauncher.getDragController());
 
-        FolderIcon icon = inflateIcon(resId, launcher, group, folderInfo);
+        FolderIcon icon = inflateIcon(resId, activityContext, group, folderInfo);
         folder.setFolderIcon(icon);
         folder.bind(folderInfo);
         icon.setFolder(folder);
 
-        icon.setOnFocusChangeListener(launcher.getFocusHandler());
+        icon.setOnFocusChangeListener(folder.mLauncher.getFocusHandler());
         icon.mBackground.paddingY = icon.isInHotseat()
-                ? 0 : launcher.getDeviceProfile().cellYPaddingPx;
+                ? 0 : activityContext.getDeviceProfile().cellYPaddingPx;
         return icon;
     }
 
@@ -754,20 +754,14 @@
     }
 
     public void clearLeaveBehindIfExists() {
-        ((CellLayout.LayoutParams) getLayoutParams()).canReorder = true;
-        if (isInHotseat()) {
-            CellLayout cl = (CellLayout) getParent().getParent();
-            cl.clearFolderLeaveBehind();
+        if (getParent() instanceof FolderIconParent) {
+            ((FolderIconParent) getParent()).clearFolderLeaveBehind(this);
         }
     }
 
     public void drawLeaveBehindIfExists() {
-        CellLayout.LayoutParams lp = (CellLayout.LayoutParams) getLayoutParams();
-        // While the folder is open, the position of the icon cannot change.
-        lp.canReorder = false;
-        if (isInHotseat()) {
-            CellLayout cl = (CellLayout) getParent().getParent();
-            cl.setFolderLeaveBehindCell(lp.cellX, lp.cellY);
+        if (getParent() instanceof FolderIconParent) {
+            ((FolderIconParent) getParent()).drawFolderLeaveBehindForIcon(this);
         }
     }
 
@@ -836,4 +830,19 @@
                     MAX_NUM_ITEMS_IN_PREVIEW);
         }
     }
+
+    /**
+     * Interface that provides callbacks to a parent ViewGroup that hosts this FolderIcon.
+     */
+    public interface FolderIconParent {
+        /**
+         * Tells the FolderIconParent to draw a "leave-behind" when the Folder is open and leaving a
+         * gap where the FolderIcon would be when the Folder is closed.
+         */
+        void drawFolderLeaveBehindForIcon(FolderIcon child);
+        /**
+         * Tells the FolderIconParent to stop drawing the "leave-behind" as the Folder is closed.
+         */
+        void clearFolderLeaveBehind(FolderIcon child);
+    }
 }
diff --git a/src/com/android/launcher3/folder/FolderPagedView.java b/src/com/android/launcher3/folder/FolderPagedView.java
index df3e92c..0235dfa 100644
--- a/src/com/android/launcher3/folder/FolderPagedView.java
+++ b/src/com/android/launcher3/folder/FolderPagedView.java
@@ -36,7 +36,6 @@
 import com.android.launcher3.CellLayout;
 import com.android.launcher3.DeviceProfile;
 import com.android.launcher3.InvariantDeviceProfile;
-import com.android.launcher3.Launcher;
 import com.android.launcher3.LauncherAppState;
 import com.android.launcher3.PagedView;
 import com.android.launcher3.R;
@@ -230,7 +229,7 @@
     }
 
     private CellLayout createAndAddNewPage() {
-        DeviceProfile grid = Launcher.getLauncher(getContext()).getDeviceProfile();
+        DeviceProfile grid = mFolder.mActivityContext.getDeviceProfile();
         CellLayout page = mViewCache.getView(R.layout.folder_page, getContext(), this);
         page.setCellDimensions(grid.folderCellWidthPx, grid.folderCellHeightPx);
         page.getShortcutsAndWidgets().setMotionEventSplittingEnabled(false);
@@ -624,7 +623,7 @@
 
     @Override
     protected boolean canScroll(float absVScroll, float absHScroll) {
-        return AbstractFloatingView.getTopOpenViewWithType(mFolder.mLauncher,
+        return AbstractFloatingView.getTopOpenViewWithType(mFolder.mActivityContext,
                 TYPE_ALL & ~TYPE_FOLDER) == null;
     }
 
diff --git a/src/com/android/launcher3/statemanager/StatefulActivity.java b/src/com/android/launcher3/statemanager/StatefulActivity.java
index 601e117..7abb653 100644
--- a/src/com/android/launcher3/statemanager/StatefulActivity.java
+++ b/src/com/android/launcher3/statemanager/StatefulActivity.java
@@ -150,8 +150,8 @@
 
     private void handleDeferredResume() {
         if (hasBeenResumed() && !getStateManager().getState().hasFlag(FLAG_NON_INTERACTIVE)) {
-            onDeferredResumed();
             addActivityFlags(ACTIVITY_STATE_DEFERRED_RESUMED);
+            onDeferredResumed();
 
             mDeferredResumePending = false;
         } else {
diff --git a/src/com/android/launcher3/views/ActivityContext.java b/src/com/android/launcher3/views/ActivityContext.java
index ae459e1..505c6ce 100644
--- a/src/com/android/launcher3/views/ActivityContext.java
+++ b/src/com/android/launcher3/views/ActivityContext.java
@@ -17,7 +17,7 @@
 
 import android.content.Context;
 import android.content.ContextWrapper;
-import android.view.ContextThemeWrapper;
+import android.graphics.Rect;
 import android.view.View.AccessibilityDelegate;
 
 import com.android.launcher3.DeviceProfile;
@@ -49,6 +49,23 @@
         return null;
     }
 
+    default Rect getFolderBoundingBox() {
+        return getDeviceProfile().getAbsoluteOpenFolderBounds();
+    }
+
+    /**
+     * After calling {@link #getFolderBoundingBox()}, we calculate a (left, top) position for a
+     * Folder of size width x height to be within those bounds. However, the chosen position may
+     * not be visually ideal (e.g. uncanny valley of centeredness), so here's a chance to update it.
+     * @param inOutPosition A 2-size array where the first element is the left position of the open
+     *     folder and the second element is the top position. Should be updated in place if desired.
+     * @param bounds The bounds that the open folder should fit inside.
+     * @param width The width of the open folder.
+     * @param height The height of the open folder.
+     */
+    default void updateOpenFolderPosition(int[] inOutPosition, Rect bounds, int width, int height) {
+    }
+
     /**
      * The root view to support drag-and-drop and popup support.
      */
@@ -56,10 +73,10 @@
 
     DeviceProfile getDeviceProfile();
 
-    static ActivityContext lookupContext(Context context) {
+    static <T extends ActivityContext> T lookupContext(Context context) {
         if (context instanceof ActivityContext) {
-            return (ActivityContext) context;
-        } else if (context instanceof ContextThemeWrapper) {
+            return (T) context;
+        } else if (context instanceof ContextWrapper) {
             return lookupContext(((ContextWrapper) context).getBaseContext());
         } else {
             throw new IllegalArgumentException("Cannot find ActivityContext in parent tree");
diff --git a/src/com/android/launcher3/views/BaseDragLayer.java b/src/com/android/launcher3/views/BaseDragLayer.java
index 15f7730..1939d15 100644
--- a/src/com/android/launcher3/views/BaseDragLayer.java
+++ b/src/com/android/launcher3/views/BaseDragLayer.java
@@ -206,15 +206,19 @@
 
     protected boolean findActiveController(MotionEvent ev) {
         mActiveController = null;
-        if ((mTouchDispatchState & (TOUCH_DISPATCHING_FROM_VIEW_GESTURE_REGION
-                | TOUCH_DISPATCHING_FROM_PROXY)) == 0) {
-            // Only look for controllers if we are not dispatching from gesture area and proxy is
-            // not active
+        if (canFindActiveController()) {
             mActiveController = findControllerToHandleTouch(ev);
         }
         return mActiveController != null;
     }
 
+    protected boolean canFindActiveController() {
+        // Only look for controllers if we are not dispatching from gesture area and proxy is
+        // not active
+        return (mTouchDispatchState & (TOUCH_DISPATCHING_FROM_VIEW_GESTURE_REGION
+                | TOUCH_DISPATCHING_FROM_PROXY)) == 0;
+    }
+
     @Override
     public boolean onRequestSendAccessibilityEvent(View child, AccessibilityEvent event) {
         // Shortcuts can appear above folder