diff --git a/quickstep/res/layout/task_thumbnail_view_header.xml b/quickstep/res/layout/task_thumbnail_view_header.xml
index ecc1559..70e4a42 100644
--- a/quickstep/res/layout/task_thumbnail_view_header.xml
+++ b/quickstep/res/layout/task_thumbnail_view_header.xml
@@ -18,6 +18,7 @@
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
+    android:id="@+id/task_thumbnail_view_header"
     android:background="@drawable/task_thumbnail_header_bg">
 
     <androidx.constraintlayout.widget.ConstraintLayout
@@ -61,6 +62,7 @@
             android:layout_marginStart="@dimen/task_thumbnail_header_margin_between_views"
             android:src="@drawable/task_header_close_button"
             android:tint="@android:color/darker_gray"
+            android:background="@null"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintTop_toTopOf="parent"
             app:layout_constraintBottom_toBottomOf="parent"
diff --git a/quickstep/src/com/android/launcher3/statehandlers/DesktopVisibilityController.kt b/quickstep/src/com/android/launcher3/statehandlers/DesktopVisibilityController.kt
index 6ee43ff..138f40a 100644
--- a/quickstep/src/com/android/launcher3/statehandlers/DesktopVisibilityController.kt
+++ b/quickstep/src/com/android/launcher3/statehandlers/DesktopVisibilityController.kt
@@ -152,6 +152,20 @@
         }
     }
 
+    /**
+     * Returns the ID of the active desk (if any) on the display whose ID is [displayId], or
+     * [INACTIVE_DESK_ID] if no desk is currently active or the multiple desks feature is disabled.
+     */
+    fun getActiveDeskId(displayId: Int): Int {
+        if (!DesktopModeStatus.enableMultipleDesktops(context)) {
+            // When the multiple desks feature is disabled, callers should not rely on the concept
+            // of a desk ID.
+            return INACTIVE_DESK_ID
+        }
+
+        return getDisplayDeskConfig(displayId)?.activeDeskId ?: INACTIVE_DESK_ID
+    }
+
     /** Returns whether a desk is currently active on the display with the given [displayId]. */
     fun isInDesktopMode(displayId: Int): Boolean {
         if (!DesktopModeStatus.enableMultipleDesktops(context)) {
@@ -615,6 +629,6 @@
         private const val TAG = "DesktopVisController"
         private const val DEBUG = false
 
-        private const val INACTIVE_DESK_ID = -1
+        public const val INACTIVE_DESK_ID = -1
     }
 }
diff --git a/quickstep/src/com/android/launcher3/taskbar/KeyboardQuickSwitchTaskView.java b/quickstep/src/com/android/launcher3/taskbar/KeyboardQuickSwitchTaskView.java
index bf5c0c8..f80dc90 100644
--- a/quickstep/src/com/android/launcher3/taskbar/KeyboardQuickSwitchTaskView.java
+++ b/quickstep/src/com/android/launcher3/taskbar/KeyboardQuickSwitchTaskView.java
@@ -197,8 +197,7 @@
 
 
         final boolean isLeftRightSplit = !splitBounds.appsStackedVertically;
-        final float leftOrTopTaskPercent = isLeftRightSplit
-                ? splitBounds.leftTaskPercent : splitBounds.topTaskPercent;
+        final float leftOrTopTaskPercent = splitBounds.getLeftTopTaskPercent();
 
         ConstraintLayout.LayoutParams leftTopParams = (ConstraintLayout.LayoutParams)
                 mThumbnailView1.getLayoutParams();
diff --git a/quickstep/src/com/android/quickstep/RecentTasksList.java b/quickstep/src/com/android/quickstep/RecentTasksList.java
index 561bab4..2c4c2f9 100644
--- a/quickstep/src/com/android/quickstep/RecentTasksList.java
+++ b/quickstep/src/com/android/quickstep/RecentTasksList.java
@@ -32,10 +32,12 @@
 import android.os.Process;
 import android.os.RemoteException;
 import android.util.SparseBooleanArray;
+import android.window.DesktopExperienceFlags;
 
 import androidx.annotation.Nullable;
 import androidx.annotation.VisibleForTesting;
 
+import com.android.launcher3.statehandlers.DesktopVisibilityController;
 import com.android.launcher3.util.LooperExecutor;
 import com.android.launcher3.util.SplitConfigurationOptions;
 import com.android.quickstep.util.DesktopTask;
@@ -354,8 +356,8 @@
         int numVisibleTasks = 0;
         for (GroupedTaskInfo rawTask : rawTasks) {
             if (rawTask.isBaseType(TYPE_DESK)) {
-                // TYPE_FREEFORM tasks is only created when desktop mode can be entered,
-                // leftover TYPE_FREEFORM tasks created when flag was on should be ignored.
+                // TYPE_DESK tasks is only created when desktop mode can be entered,
+                // leftover TYPE_DESK tasks created when flag was on should be ignored.
                 if (DesktopModeStatus.canEnterDesktopMode(mContext)) {
                     List<DesktopTask> desktopTasks = createDesktopTasks(
                             rawTask.getBaseGroupedTask());
@@ -442,7 +444,11 @@
         Set<Integer> minimizedTaskIds = minimizedTaskIdArray != null
                 ? CollectionsKt.toSet(ArraysKt.asIterable(minimizedTaskIdArray))
                 : Collections.emptySet();
-        if (enableSeparateExternalDisplayTasks()) {
+        if (enableSeparateExternalDisplayTasks()
+                && !DesktopExperienceFlags.ENABLE_MULTIPLE_DESKTOPS_BACKEND.isTrue()) {
+            // This code is not needed when the multiple desktop feature is enabled, since Shell
+            // will send a single `GroupedTaskInfo` for each desk with a unique `deskId` across
+            // all displays.
             Map<Integer, List<Task>> perDisplayTasks = new HashMap<>();
             for (TaskInfo taskInfo : recentTaskInfo.getTaskInfoList()) {
                 Task task = createTask(taskInfo, minimizedTaskIds);
@@ -450,11 +456,16 @@
                         k -> new ArrayList<>());
                 tasks.add(task);
             }
-            return MapsKt.map(perDisplayTasks, it -> new DesktopTask(it.getValue()));
+            // When the multiple desktop feature is disabled, there can only be up to a single desk
+            // on each display, The desk ID doesn't matter and should not be used.
+            return MapsKt.map(perDisplayTasks,
+                    it -> new DesktopTask(DesktopVisibilityController.INACTIVE_DESK_ID,
+                            it.getValue()));
         } else {
+            final int deskId = recentTaskInfo.getDeskId();
             List<Task> tasks = CollectionsKt.map(recentTaskInfo.getTaskInfoList(),
                     it -> createTask(it, minimizedTaskIds));
-            return List.of(new DesktopTask(tasks));
+            return List.of(new DesktopTask(deskId, tasks));
         }
     }
 
diff --git a/quickstep/src/com/android/quickstep/TaskShortcutFactory.java b/quickstep/src/com/android/quickstep/TaskShortcutFactory.java
index a69d472..f92581e 100644
--- a/quickstep/src/com/android/quickstep/TaskShortcutFactory.java
+++ b/quickstep/src/com/android/quickstep/TaskShortcutFactory.java
@@ -312,7 +312,7 @@
             RecentsView<?, ?> recentsView = taskView.getRecentsView();
             if (recentsView != null) {
                 dismissTaskMenuView();
-                recentsView.dismissTask(taskView, true, true);
+                recentsView.dismissTaskView(taskView, true, true);
                 mTarget.getStatsLogManager().logger().withItemInfo(mTaskContainer.getItemInfo())
                         .log(LAUNCHER_SYSTEM_SHORTCUT_CLOSE_APP_TAP);
             }
diff --git a/quickstep/src/com/android/quickstep/orientation/LandscapePagedViewHandler.kt b/quickstep/src/com/android/quickstep/orientation/LandscapePagedViewHandler.kt
index e72ccbf..59ea8fa 100644
--- a/quickstep/src/com/android/quickstep/orientation/LandscapePagedViewHandler.kt
+++ b/quickstep/src/com/android/quickstep/orientation/LandscapePagedViewHandler.kt
@@ -285,11 +285,7 @@
                 translationY = snapshotParams.topMargin.toFloat()
             } else {
                 val topLeftTaskPlusDividerPercent =
-                    if (splitBounds.appsStackedVertically) {
-                        splitBounds.topTaskPercent + splitBounds.dividerHeightPercent
-                    } else {
-                        splitBounds.leftTaskPercent + splitBounds.dividerWidthPercent
-                    }
+                    splitBounds.leftTopTaskPercent + splitBounds.dividerPercent
                 translationY =
                     snapshotParams.topMargin +
                         (taskViewHeight - snapshotParams.topMargin) * topLeftTaskPlusDividerPercent
@@ -440,15 +436,8 @@
         splitInfo: SplitBounds,
         desiredStagePosition: Int
     ) {
-        val topLeftTaskPercent: Float
-        val dividerBarPercent: Float
-        if (splitInfo.appsStackedVertically) {
-            topLeftTaskPercent = splitInfo.topTaskPercent
-            dividerBarPercent = splitInfo.dividerHeightPercent
-        } else {
-            topLeftTaskPercent = splitInfo.leftTaskPercent
-            dividerBarPercent = splitInfo.dividerWidthPercent
-        }
+        val topLeftTaskPercent = splitInfo.leftTopTaskPercent
+        val dividerBarPercent = splitInfo.dividerPercent
 
         if (desiredStagePosition == STAGE_POSITION_TOP_OR_LEFT) {
             outRect.bottom = outRect.top + (outRect.height() * topLeftTaskPercent).toInt()
@@ -510,12 +499,7 @@
         val totalThumbnailHeight = parentHeight - spaceAboveSnapshot
         val dividerBar = getDividerBarSize(totalThumbnailHeight, splitBoundsConfig)
 
-        val taskPercent =
-            if (splitBoundsConfig.appsStackedVertically) {
-                splitBoundsConfig.topTaskPercent
-            } else {
-                splitBoundsConfig.leftTaskPercent
-            }
+        val taskPercent = splitBoundsConfig.leftTopTaskPercent
         val firstTaskViewSize = Point(parentWidth, (totalThumbnailHeight * taskPercent).toInt())
         val secondTaskViewSize =
             Point(parentWidth, totalThumbnailHeight - firstTaskViewSize.y - dividerBar)
@@ -715,11 +699,7 @@
      * @return The divider size for the group task view.
      */
     protected fun getDividerBarSize(totalThumbnailHeight: Int, splitConfig: SplitBounds): Int {
-        return Math.round(
-            totalThumbnailHeight *
-                if (splitConfig.appsStackedVertically) splitConfig.dividerHeightPercent
-                else splitConfig.dividerWidthPercent
-        )
+        return Math.round(totalThumbnailHeight * splitConfig.dividerPercent)
     }
 
     /**
diff --git a/quickstep/src/com/android/quickstep/orientation/PortraitPagedViewHandler.java b/quickstep/src/com/android/quickstep/orientation/PortraitPagedViewHandler.java
index c1e1c2b..d9ad7ce 100644
--- a/quickstep/src/com/android/quickstep/orientation/PortraitPagedViewHandler.java
+++ b/quickstep/src/com/android/quickstep/orientation/PortraitPagedViewHandler.java
@@ -271,12 +271,8 @@
         if (splitBounds != null) {
             if (deviceProfile.isLeftRightSplit) {
                 if (desiredTaskId == splitBounds.rightBottomTaskId) {
-                    float leftTopTaskPercent = splitBounds.appsStackedVertically
-                            ? splitBounds.topTaskPercent
-                            : splitBounds.leftTaskPercent;
-                    float dividerThicknessPercent = splitBounds.appsStackedVertically
-                            ? splitBounds.dividerHeightPercent
-                            : splitBounds.dividerWidthPercent;
+                    float leftTopTaskPercent = splitBounds.getLeftTopTaskPercent();
+                    float dividerThicknessPercent = splitBounds.getDividerPercent();
                     translationX = ((taskViewWidth * leftTopTaskPercent)
                             + (taskViewWidth * dividerThicknessPercent));
                 }
@@ -285,9 +281,9 @@
                     FrameLayout.LayoutParams snapshotParams =
                             (FrameLayout.LayoutParams) thumbnailViews[0]
                                     .getLayoutParams();
-                    float bottomRightTaskPlusDividerPercent = splitBounds.appsStackedVertically
-                            ? (1f - splitBounds.topTaskPercent)
-                            : (1f - splitBounds.leftTaskPercent);
+                    float bottomRightTaskPlusDividerPercent =
+                            splitBounds.getRightBottomTaskPercent()
+                                    + splitBounds.getDividerPercent();
                     translationY = -((taskViewHeight - snapshotParams.topMargin)
                             * bottomRightTaskPlusDividerPercent);
                 }
@@ -506,12 +502,8 @@
     @Override
     public void setSplitTaskSwipeRect(DeviceProfile dp, Rect outRect,
             SplitBounds splitInfo, int desiredStagePosition) {
-        float topLeftTaskPercent = splitInfo.appsStackedVertically
-                ? splitInfo.topTaskPercent
-                : splitInfo.leftTaskPercent;
-        float dividerBarPercent = splitInfo.appsStackedVertically
-                ? splitInfo.dividerHeightPercent
-                : splitInfo.dividerWidthPercent;
+        float topLeftTaskPercent = splitInfo.getLeftTopTaskPercent();
+        float dividerBarPercent = splitInfo.getDividerPercent();
 
         int taskbarHeight = dp.isTransientTaskbar ? 0 : dp.taskbarHeight;
         float scale = (float) outRect.height() / (dp.availableHeightPx - taskbarHeight);
@@ -559,9 +551,7 @@
         primaryParams.topMargin = spaceAboveSnapshot;
 
         int totalThumbnailHeight = parentHeight - spaceAboveSnapshot;
-        float dividerScale = splitBoundsConfig.appsStackedVertically
-                ? splitBoundsConfig.dividerHeightPercent
-                : splitBoundsConfig.dividerWidthPercent;
+        float dividerScale = splitBoundsConfig.getDividerPercent();
         Pair<Point, Point> taskViewSizes =
                 getGroupedTaskViewSizes(dp, splitBoundsConfig, parentWidth, parentHeight);
         if (!inSplitSelection) {
@@ -610,12 +600,8 @@
             int parentHeight) {
         int spaceAboveSnapshot = dp.overviewTaskThumbnailTopMarginPx;
         int totalThumbnailHeight = parentHeight - spaceAboveSnapshot;
-        float dividerScale = splitBoundsConfig.appsStackedVertically
-                ? splitBoundsConfig.dividerHeightPercent
-                : splitBoundsConfig.dividerWidthPercent;
-        float taskPercent = splitBoundsConfig.appsStackedVertically
-                ? splitBoundsConfig.topTaskPercent
-                : splitBoundsConfig.leftTaskPercent;
+        float dividerScale = splitBoundsConfig.getDividerPercent();
+        float taskPercent = splitBoundsConfig.getLeftTopTaskPercent();
 
         Point firstTaskViewSize = new Point();
         Point secondTaskViewSize = new Point();
diff --git a/quickstep/src/com/android/quickstep/orientation/SeascapePagedViewHandler.kt b/quickstep/src/com/android/quickstep/orientation/SeascapePagedViewHandler.kt
index 3fb4f54..9bfa2bf 100644
--- a/quickstep/src/com/android/quickstep/orientation/SeascapePagedViewHandler.kt
+++ b/quickstep/src/com/android/quickstep/orientation/SeascapePagedViewHandler.kt
@@ -106,15 +106,8 @@
         splitInfo: SplitBounds,
         desiredStagePosition: Int
     ) {
-        val topLeftTaskPercent: Float
-        val dividerBarPercent: Float
-        if (splitInfo.appsStackedVertically) {
-            topLeftTaskPercent = splitInfo.topTaskPercent
-            dividerBarPercent = splitInfo.dividerHeightPercent
-        } else {
-            topLeftTaskPercent = splitInfo.leftTaskPercent
-            dividerBarPercent = splitInfo.dividerWidthPercent
-        }
+        val topLeftTaskPercent = splitInfo.leftTopTaskPercent
+        val dividerBarPercent = splitInfo.dividerPercent
 
         // In seascape, the primary thumbnail is counterintuitively placed at the physical bottom of
         // the screen. This is to preserve consistency when the user rotates: From the user's POV,
@@ -166,11 +159,7 @@
         } else {
             if (desiredTaskId == splitBounds.leftTopTaskId) {
                 val bottomRightTaskPlusDividerPercent =
-                    if (splitBounds.appsStackedVertically) {
-                        1f - splitBounds.topTaskPercent
-                    } else {
-                        1f - splitBounds.leftTaskPercent
-                    }
+                    splitBounds.rightBottomTaskPercent + splitBounds.dividerPercent
                 translationY =
                     banner.height -
                         (taskViewHeight - snapshotParams.topMargin) *
@@ -331,12 +320,7 @@
         val totalThumbnailHeight = parentHeight - spaceAboveSnapshot
         val dividerBar = getDividerBarSize(totalThumbnailHeight, splitBoundsConfig)
 
-        val taskPercent =
-            if (splitBoundsConfig.appsStackedVertically) {
-                splitBoundsConfig.topTaskPercent
-            } else {
-                splitBoundsConfig.leftTaskPercent
-            }
+        val taskPercent = splitBoundsConfig.leftTopTaskPercent
         val firstTaskViewSize = Point(parentWidth, (totalThumbnailHeight * taskPercent).toInt())
         val secondTaskViewSize =
             Point(parentWidth, totalThumbnailHeight - firstTaskViewSize.y - dividerBar)
diff --git a/quickstep/src/com/android/quickstep/recents/ui/mapper/TaskUiStateMapper.kt b/quickstep/src/com/android/quickstep/recents/ui/mapper/TaskUiStateMapper.kt
index fb62268..619075f 100644
--- a/quickstep/src/com/android/quickstep/recents/ui/mapper/TaskUiStateMapper.kt
+++ b/quickstep/src/com/android/quickstep/recents/ui/mapper/TaskUiStateMapper.kt
@@ -16,6 +16,7 @@
 
 package com.android.quickstep.recents.ui.mapper
 
+import android.view.View.OnClickListener
 import com.android.quickstep.recents.ui.viewmodel.TaskData
 import com.android.quickstep.task.thumbnail.TaskThumbnailUiState
 import com.android.quickstep.task.thumbnail.TaskThumbnailUiState.BackgroundOnly
@@ -36,29 +37,38 @@
      * @param taskData The [TaskData] to convert. Can be null or a specific subclass.
      * @param isLiveTile A flag indicating whether the task data represents live tile.
      * @param hasHeader A flag indicating whether the UI should display a header.
+     * @param clickCloseListener A callback when the close button in the UI is clicked.
      * @return A [TaskThumbnailUiState] representing the UI state for the given task data.
      */
     fun toTaskThumbnailUiState(
         taskData: TaskData?,
         isLiveTile: Boolean,
         hasHeader: Boolean,
+        clickCloseListener: OnClickListener?,
     ): TaskThumbnailUiState =
         when {
             taskData !is TaskData.Data -> Uninitialized
-            isLiveTile -> createLiveTileState(taskData, hasHeader)
+            isLiveTile -> createLiveTileState(taskData, hasHeader, clickCloseListener)
             isBackgroundOnly(taskData) -> BackgroundOnly(taskData.backgroundColor)
             isSnapshotSplash(taskData) ->
-                SnapshotSplash(createSnapshotState(taskData, hasHeader), taskData.icon)
+                SnapshotSplash(
+                    createSnapshotState(taskData, hasHeader, clickCloseListener),
+                    taskData.icon,
+                )
             else -> Uninitialized
         }
 
-    private fun createSnapshotState(taskData: TaskData.Data, hasHeader: Boolean): Snapshot =
-        if (canHeaderBeCreated(taskData, hasHeader)) {
+    private fun createSnapshotState(
+        taskData: TaskData.Data,
+        hasHeader: Boolean,
+        clickCloseListener: OnClickListener?,
+    ): Snapshot =
+        if (canHeaderBeCreated(taskData, hasHeader, clickCloseListener)) {
             Snapshot.WithHeader(
                 taskData.thumbnailData?.thumbnail!!,
                 taskData.thumbnailData.rotation,
                 taskData.backgroundColor,
-                ThumbnailHeader(taskData.icon!!, taskData.titleDescription!!),
+                ThumbnailHeader(taskData.icon!!, taskData.titleDescription!!, clickCloseListener!!),
             )
         } else {
             Snapshot.WithoutHeader(
@@ -74,13 +84,26 @@
     private fun isSnapshotSplash(taskData: TaskData.Data) =
         taskData.thumbnailData?.thumbnail != null && !taskData.isLocked
 
-    private fun canHeaderBeCreated(taskData: TaskData.Data, hasHeader: Boolean) =
-        hasHeader && taskData.icon != null && taskData.titleDescription != null
+    private fun canHeaderBeCreated(
+        taskData: TaskData.Data,
+        hasHeader: Boolean,
+        clickCloseListener: OnClickListener?,
+    ) =
+        hasHeader &&
+            taskData.icon != null &&
+            taskData.titleDescription != null &&
+            clickCloseListener != null
 
-    private fun createLiveTileState(taskData: TaskData.Data, hasHeader: Boolean) =
-        if (canHeaderBeCreated(taskData, hasHeader)) {
+    private fun createLiveTileState(
+        taskData: TaskData.Data,
+        hasHeader: Boolean,
+        clickCloseListener: OnClickListener?,
+    ) =
+        if (canHeaderBeCreated(taskData, hasHeader, clickCloseListener)) {
             // TODO(http://b/353965691): figure out what to do when `icon` or `titleDescription` is
             //  null.
-            LiveTile.WithHeader(ThumbnailHeader(taskData.icon!!, taskData.titleDescription!!))
+            LiveTile.WithHeader(
+                ThumbnailHeader(taskData.icon!!, taskData.titleDescription!!, clickCloseListener!!)
+            )
         } else LiveTile.WithoutHeader
 }
diff --git a/quickstep/src/com/android/quickstep/task/thumbnail/TaskThumbnailUiState.kt b/quickstep/src/com/android/quickstep/task/thumbnail/TaskThumbnailUiState.kt
index 6118544..db593d3 100644
--- a/quickstep/src/com/android/quickstep/task/thumbnail/TaskThumbnailUiState.kt
+++ b/quickstep/src/com/android/quickstep/task/thumbnail/TaskThumbnailUiState.kt
@@ -19,6 +19,7 @@
 import android.graphics.Bitmap
 import android.graphics.drawable.Drawable
 import android.view.Surface
+import android.view.View.OnClickListener
 import androidx.annotation.ColorInt
 
 sealed class TaskThumbnailUiState {
@@ -54,5 +55,9 @@
         ) : Snapshot()
     }
 
-    data class ThumbnailHeader(val icon: Drawable, val title: String)
+    data class ThumbnailHeader(
+        val icon: Drawable,
+        val title: String,
+        val clickCloseListener: OnClickListener,
+    )
 }
diff --git a/quickstep/src/com/android/quickstep/task/thumbnail/TaskThumbnailView.kt b/quickstep/src/com/android/quickstep/task/thumbnail/TaskThumbnailView.kt
index e91073a..0edbacc 100644
--- a/quickstep/src/com/android/quickstep/task/thumbnail/TaskThumbnailView.kt
+++ b/quickstep/src/com/android/quickstep/task/thumbnail/TaskThumbnailView.kt
@@ -181,8 +181,10 @@
     private fun resetViews() {
         liveTileView.isInvisible = true
         thumbnailView.isInvisible = true
+        thumbnailView.setImageBitmap(null)
         splashBackground.alpha = 0f
         splashIcon.alpha = 0f
+        splashIcon.setImageDrawable(null)
         scrimView.alpha = 0f
         setBackgroundColor(Color.BLACK)
         taskThumbnailViewHeader?.isInvisible = true
diff --git a/quickstep/src/com/android/quickstep/util/DesktopTask.kt b/quickstep/src/com/android/quickstep/util/DesktopTask.kt
index 53ea022..fbe3bc6 100644
--- a/quickstep/src/com/android/quickstep/util/DesktopTask.kt
+++ b/quickstep/src/com/android/quickstep/util/DesktopTask.kt
@@ -20,17 +20,19 @@
 
 /**
  * A [Task] container that can contain N number of tasks that are part of the desktop in recent
- * tasks list. Note that desktops can be empty with no tasks in them.
+ * tasks list. Note that desktops can be empty with no tasks in them. The [deskId] makes sense only
+ * when the multiple desks feature is enabled.
  */
-class DesktopTask(tasks: List<Task>) : GroupTask(tasks, TaskViewType.DESKTOP) {
+class DesktopTask(val deskId: Int, tasks: List<Task>) : GroupTask(tasks, TaskViewType.DESKTOP) {
 
-    override fun copy() = DesktopTask(tasks)
+    override fun copy() = DesktopTask(deskId, tasks)
 
-    override fun toString() = "type=$taskViewType tasks=$tasks"
+    override fun toString() = "type=$taskViewType deskId=$deskId tasks=$tasks"
 
     override fun equals(o: Any?): Boolean {
         if (this === o) return true
         if (o !is DesktopTask) return false
+        if (deskId != o.deskId) return false
         return super.equals(o)
     }
 }
diff --git a/quickstep/src/com/android/quickstep/views/DesktopTaskView.kt b/quickstep/src/com/android/quickstep/views/DesktopTaskView.kt
index 9bb8f3d..75f3b69 100644
--- a/quickstep/src/com/android/quickstep/views/DesktopTaskView.kt
+++ b/quickstep/src/com/android/quickstep/views/DesktopTaskView.kt
@@ -345,14 +345,7 @@
         explodeProgress = 0.0f
         viewModel = null
         visibility = VISIBLE
-        taskContainers.forEach {
-            contentView.removeView(it.snapshotView)
-            if (enableRefactorTaskThumbnail()) {
-                taskThumbnailViewPool!!.recycle(it.thumbnailView)
-            } else {
-                taskThumbnailViewDeprecatedPool!!.recycle(it.thumbnailViewDeprecated)
-            }
-        }
+        taskContainers.forEach { removeAndRecycleThumbnailView(it) }
     }
 
     @SuppressLint("RtlHardcoded")
@@ -360,19 +353,7 @@
         super.updateTaskSize(lastComputedTaskSize, lastComputedGridTaskSize)
         this.lastComputedTaskSize.set(lastComputedTaskSize)
 
-        BaseContainerInterface.getTaskDimension(mContext, container.deviceProfile, tempPointF)
-        val desktopSize = Size(tempPointF.x.toInt(), tempPointF.y.toInt())
-        DEFAULT_BOUNDS.set(0, 0, desktopSize.width / 4, desktopSize.height / 4)
-
-        fullscreenTaskPositions =
-            taskContainers.map {
-                DesktopTaskBoundsData(it.task.key.id, it.task.appBounds ?: DEFAULT_BOUNDS)
-            }
-
-        if (enableDesktopExplodedView()) {
-            viewModel?.organizeDesktopTasks(desktopSize, fullscreenTaskPositions)
-        }
-        positionTaskWindows()
+        updateTaskPositions()
     }
 
     override fun onTaskListVisibilityChanged(visible: Boolean, changes: Int) {
@@ -458,6 +439,56 @@
         ViewUtils.addAccessibleChildToList(backgroundView, outChildren)
     }
 
+    fun removeTaskFromExplodedView(taskId: Int, animate: Boolean) {
+        if (!enableDesktopExplodedView()) {
+            Log.e(
+                TAG,
+                "removeTaskFromExplodedView called when enableDesktopExplodedView flag is false",
+            )
+            return
+        }
+
+        // Remove the task's [taskContainer] and its associated Views.
+        val taskContainer = getTaskContainerById(taskId) ?: return
+        removeAndRecycleThumbnailView(taskContainer)
+        taskContainer.destroy()
+        taskContainers = taskContainers.filterNot { it == taskContainer }
+
+        // Dismiss the current DesktopTaskView if all its windows are closed.
+        if (taskContainers.isEmpty()) {
+            recentsView?.dismissTaskView(this, animate, /* removeTask= */ true)
+        } else {
+            // Otherwise, re-position the remaining task windows.
+            // TODO(b/353949276): Implement the re-layout animations.
+            updateTaskPositions()
+        }
+    }
+
+    private fun removeAndRecycleThumbnailView(taskContainer: TaskContainer) {
+        contentView.removeView(taskContainer.snapshotView)
+        if (enableRefactorTaskThumbnail()) {
+            taskThumbnailViewPool!!.recycle(taskContainer.thumbnailView)
+        } else {
+            taskThumbnailViewDeprecatedPool!!.recycle(taskContainer.thumbnailViewDeprecated)
+        }
+    }
+
+    private fun updateTaskPositions() {
+        BaseContainerInterface.getTaskDimension(mContext, container.deviceProfile, tempPointF)
+        val desktopSize = Size(tempPointF.x.toInt(), tempPointF.y.toInt())
+        DEFAULT_BOUNDS.set(0, 0, desktopSize.width / 4, desktopSize.height / 4)
+
+        fullscreenTaskPositions =
+            taskContainers.map {
+                DesktopTaskBoundsData(it.task.key.id, it.task.appBounds ?: DEFAULT_BOUNDS)
+            }
+
+        if (enableDesktopExplodedView()) {
+            viewModel?.organizeDesktopTasks(desktopSize, fullscreenTaskPositions)
+        }
+        positionTaskWindows()
+    }
+
     companion object {
         private const val TAG = "DesktopTaskView"
         private const val DEBUG = false
diff --git a/quickstep/src/com/android/quickstep/views/DigitalWellBeingToast.kt b/quickstep/src/com/android/quickstep/views/DigitalWellBeingToast.kt
index c07b7fb..5c4a35d 100644
--- a/quickstep/src/com/android/quickstep/views/DigitalWellBeingToast.kt
+++ b/quickstep/src/com/android/quickstep/views/DigitalWellBeingToast.kt
@@ -189,11 +189,11 @@
                 SplitBannerConfig.SPLIT_GRID_BANNER_LARGE
             // For landscape grid, for 30% width we only show icon, otherwise show icon and time
             task.key.id == splitBounds.leftTopTaskId ->
-                if (splitBounds.leftTaskPercent < THRESHOLD_LEFT_ICON_ONLY)
+                if (splitBounds.leftTopTaskPercent < THRESHOLD_LEFT_ICON_ONLY)
                     SplitBannerConfig.SPLIT_GRID_BANNER_SMALL
                 else SplitBannerConfig.SPLIT_GRID_BANNER_LARGE
             else ->
-                if (splitBounds.leftTaskPercent > THRESHOLD_RIGHT_ICON_ONLY)
+                if (splitBounds.leftTopTaskPercent > THRESHOLD_RIGHT_ICON_ONLY)
                     SplitBannerConfig.SPLIT_GRID_BANNER_SMALL
                 else SplitBannerConfig.SPLIT_GRID_BANNER_LARGE
         }
diff --git a/quickstep/src/com/android/quickstep/views/GroupedTaskView.kt b/quickstep/src/com/android/quickstep/views/GroupedTaskView.kt
index 2abfb13..25011d7 100644
--- a/quickstep/src/com/android/quickstep/views/GroupedTaskView.kt
+++ b/quickstep/src/com/android/quickstep/views/GroupedTaskView.kt
@@ -189,16 +189,12 @@
         val inSplitSelection = getThisTaskCurrentlyInSplitSelection() != INVALID_TASK_ID
 
         if (enableFlexibleTwoAppSplit()) {
-            val topLeftTaskPercent =
-                if (deviceProfile.isLeftRightSplit) splitBoundsConfig.leftTaskPercent
-                else splitBoundsConfig.topTaskPercent
-            val bottomRightTaskPercent = 1 - topLeftTaskPercent
-            leftTopTaskContainer.iconView.setFlexSplitAlpha(
-                if (topLeftTaskPercent < MINIMUM_RATIO_TO_SHOW_ICON) 0f else 1f
-            )
-            rightBottomTaskContainer.iconView.setFlexSplitAlpha(
-                if (bottomRightTaskPercent < MINIMUM_RATIO_TO_SHOW_ICON) 0f else 1f
-            )
+            val topLeftTaskPercent = splitBoundsConfig.leftTopTaskPercent
+            val bottomRightTaskPercent = splitBoundsConfig.rightBottomTaskPercent
+            val hideTopLeftIcon = topLeftTaskPercent < MINIMUM_RATIO_TO_SHOW_ICON
+            val hideBottomRightIcon = bottomRightTaskPercent < MINIMUM_RATIO_TO_SHOW_ICON
+            leftTopTaskContainer.iconView.setFlexSplitAlpha(if (hideTopLeftIcon) 0f else 1f)
+            rightBottomTaskContainer.iconView.setFlexSplitAlpha(if (hideBottomRightIcon) 0f else 1f)
         }
 
         if (enableOverviewIconMenu()) {
diff --git a/quickstep/src/com/android/quickstep/views/RecentsDismissUtils.kt b/quickstep/src/com/android/quickstep/views/RecentsDismissUtils.kt
index 96eed87..3430b39 100644
--- a/quickstep/src/com/android/quickstep/views/RecentsDismissUtils.kt
+++ b/quickstep/src/com/android/quickstep/views/RecentsDismissUtils.kt
@@ -76,7 +76,7 @@
                 }
                 .addEndListener { _, _, _, _ ->
                     if (isDismissing) {
-                        recentsView.dismissTask(
+                        recentsView.dismissTaskView(
                             draggedTaskView,
                             /* animateTaskView = */ false,
                             /* removeTask = */ true,
diff --git a/quickstep/src/com/android/quickstep/views/RecentsView.java b/quickstep/src/com/android/quickstep/views/RecentsView.java
index 5a277b9..f53583a 100644
--- a/quickstep/src/com/android/quickstep/views/RecentsView.java
+++ b/quickstep/src/com/android/quickstep/views/RecentsView.java
@@ -676,11 +676,11 @@
                     MAIN_EXECUTOR,
                     apkRemoved -> {
                         if (apkRemoved) {
-                            dismissTask(taskId);
+                            dismissTask(taskId, /*animate=*/true, /*removeTask=*/false);
                         } else {
                             mModel.isTaskRemoved(taskKey.id, taskRemoved -> {
                                 if (taskRemoved) {
-                                    dismissTask(taskId);
+                                    dismissTask(taskId, /*animate=*/true, /*removeTask=*/false);
                                 }
                             }, RecentsFilterState.getFilter(mFilterState.getPackageNameToFilter()));
                         }
@@ -3048,8 +3048,12 @@
             // Add an empty view for now until the task plan is loaded and applied
             final TaskView taskView;
             if (needDesktopTask) {
+                final int activeDeskId =
+                        DesktopVisibilityController.INSTANCE.get(mContext).getActiveDeskId(
+                                mContainer.getDisplay().getDisplayId());
                 taskView = getTaskViewFromPool(TaskViewType.DESKTOP);
-                ((DesktopTaskView) taskView).bind(new DesktopTask(Arrays.asList(runningTasks)),
+                ((DesktopTaskView) taskView).bind(
+                        new DesktopTask(activeDeskId, Arrays.asList(runningTasks)),
                         mOrientationState, mTaskOverlayFactory);
             } else if (needGroupTaskView) {
                 taskView = getTaskViewFromPool(TaskViewType.GROUPED);
@@ -4627,17 +4631,27 @@
     }
 
     @UiThread
-    private void dismissTask(int taskId) {
+    public void dismissTask(int taskId, boolean animate, boolean removeTask) {
         TaskView taskView = getTaskViewByTaskId(taskId);
         if (taskView == null) {
             Log.d(TAG, "dismissTask: " + taskId + ",  no associated TaskView");
             return;
         }
         Log.d(TAG, "dismissTask: " + taskId);
-        dismissTask(taskView, true /* animate */, false /* removeTask */);
+
+        if (enableDesktopExplodedView() && taskView instanceof  DesktopTaskView desktopTaskView) {
+            desktopTaskView.removeTaskFromExplodedView(taskId, animate);
+
+            if (removeTask) {
+                ActivityManagerWrapper.getInstance().removeTask(taskId);
+            }
+        } else {
+            dismissTaskView(taskView, animate, removeTask);
+        }
     }
 
-    public void dismissTask(TaskView taskView, boolean animateTaskView, boolean removeTask) {
+    /** Dismisses the entire [taskView]. */
+    public void dismissTaskView(TaskView taskView, boolean animateTaskView, boolean removeTask) {
         PendingAnimation pa = new PendingAnimation(DISMISS_TASK_DURATION);
         createTaskDismissAnimation(pa, taskView, animateTaskView, removeTask, DISMISS_TASK_DURATION,
                 false /* dismissingForSplitSelection*/);
@@ -4653,7 +4667,7 @@
     private void dismissCurrentTask() {
         TaskView taskView = getNextPageTaskView();
         if (taskView != null) {
-            dismissTask(taskView, true /*animateTaskView*/, true /*removeTask*/);
+            dismissTaskView(taskView, true /*animateTaskView*/, true /*removeTask*/);
         }
     }
 
diff --git a/quickstep/src/com/android/quickstep/views/TaskContainer.kt b/quickstep/src/com/android/quickstep/views/TaskContainer.kt
index 7301cfc..2b9d036 100644
--- a/quickstep/src/com/android/quickstep/views/TaskContainer.kt
+++ b/quickstep/src/com/android/quickstep/views/TaskContainer.kt
@@ -19,6 +19,7 @@
 import android.graphics.Bitmap
 import android.graphics.Matrix
 import android.view.View
+import android.view.View.OnClickListener
 import com.android.launcher3.Flags.enableRefactorTaskThumbnail
 import com.android.launcher3.model.data.TaskViewItemInfo
 import com.android.launcher3.util.SplitConfigurationOptions
@@ -108,6 +109,8 @@
         overlay.destroy()
         if (enableRefactorTaskThumbnail()) {
             isThumbnailValid = false
+            thumbnailData = null
+            thumbnailView.onRecycle()
         } else {
             thumbnailViewDeprecated.setShowSplashForSplitSelection(false)
         }
@@ -127,9 +130,19 @@
         overlay.addChildForAccessibility(outChildren)
     }
 
-    fun setState(state: TaskData?, liveTile: Boolean, hasHeader: Boolean) {
+    fun setState(
+        state: TaskData?,
+        liveTile: Boolean,
+        hasHeader: Boolean,
+        clickCloseListener: OnClickListener?,
+    ) {
         thumbnailView.setState(
-            TaskUiStateMapper.toTaskThumbnailUiState(state, liveTile, hasHeader),
+            TaskUiStateMapper.toTaskThumbnailUiState(
+                state,
+                liveTile,
+                hasHeader,
+                clickCloseListener,
+            ),
             state?.taskId,
         )
         thumbnailData = if (state is TaskData.Data) state.thumbnailData else null
diff --git a/quickstep/src/com/android/quickstep/views/TaskThumbnailViewHeader.kt b/quickstep/src/com/android/quickstep/views/TaskThumbnailViewHeader.kt
index 9eb294a..9a8805b 100644
--- a/quickstep/src/com/android/quickstep/views/TaskThumbnailViewHeader.kt
+++ b/quickstep/src/com/android/quickstep/views/TaskThumbnailViewHeader.kt
@@ -19,6 +19,7 @@
 import android.content.Context
 import android.util.AttributeSet
 import android.widget.FrameLayout
+import android.widget.ImageButton
 import android.widget.ImageView
 import android.widget.TextView
 import com.android.launcher3.R
@@ -30,9 +31,11 @@
 
     private val headerTitleView: TextView by lazy { findViewById(R.id.header_app_title) }
     private val headerIconView: ImageView by lazy { findViewById(R.id.header_app_icon) }
+    private val headerCloseButton: ImageButton by lazy { findViewById(R.id.header_close_button) }
 
     fun setHeader(header: ThumbnailHeader) {
         headerTitleView.setText(header.title)
         headerIconView.setImageDrawable(header.icon)
+        headerCloseButton.setOnClickListener(header.clickCloseListener)
     }
 }
diff --git a/quickstep/src/com/android/quickstep/views/TaskView.kt b/quickstep/src/com/android/quickstep/views/TaskView.kt
index ba54232..0e5382a 100644
--- a/quickstep/src/com/android/quickstep/views/TaskView.kt
+++ b/quickstep/src/com/android/quickstep/views/TaskView.kt
@@ -44,6 +44,7 @@
 import androidx.core.view.updateLayoutParams
 import com.android.app.animation.Interpolators
 import com.android.launcher3.Flags.enableCursorHoverStates
+import com.android.launcher3.Flags.enableDesktopExplodedView
 import com.android.launcher3.Flags.enableGridOnlyOverview
 import com.android.launcher3.Flags.enableHoverOfChildElementsInTaskview
 import com.android.launcher3.Flags.enableLargeDesktopWindowingTile
@@ -768,11 +769,27 @@
         // Updating containers
         val mapOfTasks = state.tasks.associateBy { it.taskId }
         taskContainers.forEach { container ->
-            val containerState = mapOfTasks[container.task.key.id]
+            val taskId = container.task.key.id
+            val containerState = mapOfTasks[taskId]
+            val shouldHaveHeader = (type == TaskViewType.DESKTOP) && enableDesktopExplodedView()
             container.setState(
                 state = containerState,
                 liveTile = state.isLiveTile,
-                hasHeader = state.hasHeader,
+                hasHeader = shouldHaveHeader,
+                clickCloseListener =
+                    if (shouldHaveHeader) {
+                        {
+                            // Update the layout UI to remove this task from the layout grid, and
+                            // remove the task from ActivityManager afterwards.
+                            recentsView?.dismissTask(
+                                taskId,
+                                /* animate= */ true,
+                                /* removeTask= */ true,
+                            )
+                        }
+                    } else {
+                        null
+                    },
             )
             updateThumbnailValidity(container)
             updateThumbnailMatrix(
diff --git a/quickstep/tests/multivalentTests/src/com/android/launcher3/taskbar/TaskbarOverflowTest.kt b/quickstep/tests/multivalentTests/src/com/android/launcher3/taskbar/TaskbarOverflowTest.kt
index bfd53ef..2cd09cc 100644
--- a/quickstep/tests/multivalentTests/src/com/android/launcher3/taskbar/TaskbarOverflowTest.kt
+++ b/quickstep/tests/multivalentTests/src/com/android/launcher3/taskbar/TaskbarOverflowTest.kt
@@ -332,7 +332,7 @@
             (0..<tasksToAdd).map {
                 Task(Task.TaskKey(it, 0, Intent(), ComponentName("", ""), 0, 2000))
             }
-        recentsModel.updateRecentTasks(listOf(DesktopTask(tasks)))
+        recentsModel.updateRecentTasks(listOf(DesktopTask(deskId = 0, tasks)))
         desktopTaskListener?.onTasksVisibilityChanged(
             context.virtualDisplay.display.displayId,
             tasksToAdd,
diff --git a/quickstep/tests/multivalentTests/src/com/android/launcher3/taskbar/TaskbarRecentAppsControllerTest.kt b/quickstep/tests/multivalentTests/src/com/android/launcher3/taskbar/TaskbarRecentAppsControllerTest.kt
index c792783..002c988 100644
--- a/quickstep/tests/multivalentTests/src/com/android/launcher3/taskbar/TaskbarRecentAppsControllerTest.kt
+++ b/quickstep/tests/multivalentTests/src/com/android/launcher3/taskbar/TaskbarRecentAppsControllerTest.kt
@@ -877,7 +877,7 @@
         val allTasks =
             ArrayList<GroupTask>().apply {
                 if (!runningTasks.isEmpty()) {
-                    add(DesktopTask(ArrayList(runningTasks)))
+                    add(DesktopTask(deskId = 0, ArrayList(runningTasks)))
                 }
                 addAll(recentTasks)
             }
diff --git a/quickstep/tests/multivalentTests/src/com/android/quickstep/inputconsumers/NavHandleLongPressInputConsumerTest.java b/quickstep/tests/multivalentTests/src/com/android/quickstep/inputconsumers/NavHandleLongPressInputConsumerTest.java
index de6920b..99a34ea 100644
--- a/quickstep/tests/multivalentTests/src/com/android/quickstep/inputconsumers/NavHandleLongPressInputConsumerTest.java
+++ b/quickstep/tests/multivalentTests/src/com/android/quickstep/inputconsumers/NavHandleLongPressInputConsumerTest.java
@@ -28,6 +28,7 @@
 import static com.android.launcher3.logging.StatsLogManager.LauncherLatencyEvent.LAUNCHER_LATENCY_CONTEXTUAL_SEARCH_LPNH_ABANDON;
 import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
 import static com.android.quickstep.DeviceConfigWrapper.DEFAULT_LPNH_TIMEOUT_MS;
+import static com.android.quickstep.inputconsumers.NavHandleLongPressInputConsumer.MIN_TIME_TO_LOG_ABANDON_MS;
 
 import static com.google.common.truth.Truth.assertThat;
 
@@ -147,8 +148,7 @@
     public void testDelegateDisallowsTouchInterceptAfterTouchDown() {
         // Touch down and wait the minimum abandonment time.
         mUnderTest.onMotionEvent(generateCenteredMotionEvent(ACTION_DOWN));
-        SystemClock.sleep(NavHandleLongPressInputConsumer.MIN_TIME_TO_LOG_ABANDON_MS);
-        InstrumentationRegistry.getInstrumentation().waitForIdleSync();
+        sleep(MIN_TIME_TO_LOG_ABANDON_MS);
 
         // Delegate should still get touches unless long press is triggered.
         verify(mDelegate).onMotionEvent(any());
@@ -173,8 +173,7 @@
     @Test
     public void testLongPressTriggered() {
         mUnderTest.onMotionEvent(generateCenteredMotionEvent(ACTION_DOWN));
-        SystemClock.sleep(DEFAULT_LPNH_TIMEOUT_MS);
-        InstrumentationRegistry.getInstrumentation().waitForIdleSync();
+        sleep(DEFAULT_LPNH_TIMEOUT_MS);
 
         assertThat(mUnderTest.mState).isEqualTo(DelegateInputConsumer.STATE_ACTIVE);
         assertTrue(mLongPressTriggered.get());
@@ -191,10 +190,8 @@
     @Test
     public void testLongPressTriggeredWithSlightVerticalMovement() {
         mUnderTest.onMotionEvent(generateCenteredMotionEvent(ACTION_DOWN));
-        mUnderTest.onMotionEvent(generateCenteredMotionEventWithYOffset(ACTION_MOVE,
-                -(TOUCH_SLOP - 1)));
-        SystemClock.sleep(DEFAULT_LPNH_TIMEOUT_MS);
-        InstrumentationRegistry.getInstrumentation().waitForIdleSync();
+        mUnderTest.onMotionEvent(generateCenteredMotionEventWithYOffset(ACTION_MOVE, 1));
+        sleep(DEFAULT_LPNH_TIMEOUT_MS);
 
         assertThat(mUnderTest.mState).isEqualTo(DelegateInputConsumer.STATE_ACTIVE);
         assertTrue(mLongPressTriggered.get());
@@ -207,10 +204,8 @@
     @Test
     public void testLongPressTriggeredWithSlightHorizontalMovement() {
         mUnderTest.onMotionEvent(generateCenteredMotionEvent(ACTION_DOWN));
-        mUnderTest.onMotionEvent(generateMotionEvent(ACTION_MOVE,
-                mScreenWidth / 2f - (TOUCH_SLOP - 1), 0));
-        SystemClock.sleep(DEFAULT_LPNH_TIMEOUT_MS);
-        InstrumentationRegistry.getInstrumentation().waitForIdleSync();
+        mUnderTest.onMotionEvent(generateMotionEvent(ACTION_MOVE, mScreenWidth / 2f + 1, 0));
+        sleep(DEFAULT_LPNH_TIMEOUT_MS);
 
         assertThat(mUnderTest.mState).isEqualTo(DelegateInputConsumer.STATE_ACTIVE);
         assertTrue(mLongPressTriggered.get());
@@ -230,8 +225,7 @@
             mUnderTest.onMotionEvent(generateMotionEvent(ACTION_MOVE,
                     mScreenWidth / 2f - (TOUCH_SLOP - 1), 0));
             // We have entered the second stage, so the normal timeout shouldn't trigger.
-            SystemClock.sleep(DEFAULT_LPNH_TIMEOUT_MS);
-            InstrumentationRegistry.getInstrumentation().waitForIdleSync();
+            sleep(DEFAULT_LPNH_TIMEOUT_MS);
 
             assertThat(mUnderTest.mState).isEqualTo(DelegateInputConsumer.STATE_INACTIVE);
             assertFalse(mLongPressTriggered.get());
@@ -241,9 +235,8 @@
             // After an extended time, the long press should trigger.
             float extendedDurationMultiplier =
                     (DeviceConfigWrapper.get().getTwoStageDurationPercentage() / 100f);
-            SystemClock.sleep((long) (DEFAULT_LPNH_TIMEOUT_MS
+            sleep((long) (DEFAULT_LPNH_TIMEOUT_MS
                     * (extendedDurationMultiplier - 1)));  // -1 because we already waited 1x
-            InstrumentationRegistry.getInstrumentation().waitForIdleSync();
 
             assertThat(mUnderTest.mState).isEqualTo(DelegateInputConsumer.STATE_ACTIVE);
             assertTrue(mLongPressTriggered.get());
@@ -264,8 +257,7 @@
 
             mUnderTest.onMotionEvent(generateCenteredMotionEvent(ACTION_DOWN));
             // We have not entered the second stage, so the normal timeout should trigger.
-            SystemClock.sleep(DEFAULT_LPNH_TIMEOUT_MS);
-            InstrumentationRegistry.getInstrumentation().waitForIdleSync();
+            sleep(DEFAULT_LPNH_TIMEOUT_MS);
 
             assertThat(mUnderTest.mState).isEqualTo(DelegateInputConsumer.STATE_ACTIVE);
             assertTrue(mLongPressTriggered.get());
@@ -281,16 +273,14 @@
     @Test
     public void testLongPressAbortedByTouchUp() {
         mUnderTest.onMotionEvent(generateCenteredMotionEvent(ACTION_DOWN));
-        SystemClock.sleep(DEFAULT_LPNH_TIMEOUT_MS - 10);
-        InstrumentationRegistry.getInstrumentation().waitForIdleSync();
+        sleep(MIN_TIME_TO_LOG_ABANDON_MS);
 
         assertThat(mUnderTest.mState).isEqualTo(DelegateInputConsumer.STATE_INACTIVE);
         assertFalse(mLongPressTriggered.get());
 
         mUnderTest.onMotionEvent(generateCenteredMotionEvent(ACTION_UP));
         // Wait past the long press timeout, to be extra sure it wouldn't have triggered.
-        SystemClock.sleep(20);
-        InstrumentationRegistry.getInstrumentation().waitForIdleSync();
+        sleep(DEFAULT_LPNH_TIMEOUT_MS);
 
         assertThat(mUnderTest.mState).isEqualTo(DelegateInputConsumer.STATE_INACTIVE);
         assertFalse(mLongPressTriggered.get());
@@ -303,16 +293,14 @@
     @Test
     public void testLongPressAbortedByTouchCancel() {
         mUnderTest.onMotionEvent(generateCenteredMotionEvent(ACTION_DOWN));
-        SystemClock.sleep(DEFAULT_LPNH_TIMEOUT_MS - 10);
-        InstrumentationRegistry.getInstrumentation().waitForIdleSync();
+        sleep(MIN_TIME_TO_LOG_ABANDON_MS);
 
         assertThat(mUnderTest.mState).isEqualTo(DelegateInputConsumer.STATE_INACTIVE);
         assertFalse(mLongPressTriggered.get());
 
         mUnderTest.onMotionEvent(generateCenteredMotionEvent(ACTION_CANCEL));
         // Wait past the long press timeout, to be extra sure it wouldn't have triggered.
-        SystemClock.sleep(20);
-        InstrumentationRegistry.getInstrumentation().waitForIdleSync();
+        sleep(DEFAULT_LPNH_TIMEOUT_MS);
 
         assertThat(mUnderTest.mState).isEqualTo(DelegateInputConsumer.STATE_INACTIVE);
         assertFalse(mLongPressTriggered.get());
@@ -325,8 +313,7 @@
     @Test
     public void testLongPressAbortedByTouchSlopPassedVertically() {
         mUnderTest.onMotionEvent(generateCenteredMotionEvent(ACTION_DOWN));
-        SystemClock.sleep(DEFAULT_LPNH_TIMEOUT_MS - 10);
-        InstrumentationRegistry.getInstrumentation().waitForIdleSync();
+        sleep(MIN_TIME_TO_LOG_ABANDON_MS);
 
         assertThat(mUnderTest.mState).isEqualTo(DelegateInputConsumer.STATE_INACTIVE);
         assertFalse(mLongPressTriggered.get());
@@ -334,8 +321,7 @@
         mUnderTest.onMotionEvent(generateCenteredMotionEventWithYOffset(ACTION_MOVE,
                 -(TOUCH_SLOP + 1)));
         // Wait past the long press timeout, to be extra sure it wouldn't have triggered.
-        SystemClock.sleep(20);
-        InstrumentationRegistry.getInstrumentation().waitForIdleSync();
+        sleep(DEFAULT_LPNH_TIMEOUT_MS);
 
         assertThat(mUnderTest.mState).isEqualTo(DelegateInputConsumer.STATE_INACTIVE);
         assertFalse(mLongPressTriggered.get());
@@ -348,8 +334,7 @@
     @Test
     public void testLongPressAbortedByTouchSlopPassedHorizontally() {
         mUnderTest.onMotionEvent(generateCenteredMotionEvent(ACTION_DOWN));
-        SystemClock.sleep(DEFAULT_LPNH_TIMEOUT_MS - 10);
-        InstrumentationRegistry.getInstrumentation().waitForIdleSync();
+        sleep(MIN_TIME_TO_LOG_ABANDON_MS);
 
         assertThat(mUnderTest.mState).isEqualTo(DelegateInputConsumer.STATE_INACTIVE);
         assertFalse(mLongPressTriggered.get());
@@ -357,8 +342,7 @@
         mUnderTest.onMotionEvent(generateMotionEvent(ACTION_MOVE,
                 mScreenWidth / 2f - (TOUCH_SLOP + 1), 0));
         // Wait past the long press timeout, to be extra sure it wouldn't have triggered.
-        SystemClock.sleep(20);
-        InstrumentationRegistry.getInstrumentation().waitForIdleSync();
+        sleep(DEFAULT_LPNH_TIMEOUT_MS);
 
         assertThat(mUnderTest.mState).isEqualTo(DelegateInputConsumer.STATE_INACTIVE);
         assertFalse(mLongPressTriggered.get());
@@ -379,8 +363,7 @@
             mUnderTest.onMotionEvent(generateCenteredMotionEventWithYOffset(ACTION_MOVE,
                     -(TOUCH_SLOP - 1)));
             // Normal duration shouldn't trigger.
-            SystemClock.sleep(DEFAULT_LPNH_TIMEOUT_MS);
-            InstrumentationRegistry.getInstrumentation().waitForIdleSync();
+            sleep(DEFAULT_LPNH_TIMEOUT_MS);
 
             assertThat(mUnderTest.mState).isEqualTo(DelegateInputConsumer.STATE_INACTIVE);
             assertFalse(mLongPressTriggered.get());
@@ -391,9 +374,8 @@
             // Wait past the extended long press timeout, to be sure it wouldn't have triggered.
             float extendedDurationMultiplier =
                     (DeviceConfigWrapper.get().getTwoStageDurationPercentage() / 100f);
-            SystemClock.sleep((long) (DEFAULT_LPNH_TIMEOUT_MS
+            sleep((long) (DEFAULT_LPNH_TIMEOUT_MS
                     * (extendedDurationMultiplier - 1)));  // -1 because we already waited 1x
-            InstrumentationRegistry.getInstrumentation().waitForIdleSync();
 
             assertThat(mUnderTest.mState).isEqualTo(DelegateInputConsumer.STATE_INACTIVE);
             assertFalse(mLongPressTriggered.get());
@@ -418,8 +400,7 @@
             mUnderTest.onMotionEvent(generateMotionEvent(ACTION_MOVE,
                     mScreenWidth / 2f - (TOUCH_SLOP - 1), 0));
             // Normal duration shouldn't trigger.
-            SystemClock.sleep(DEFAULT_LPNH_TIMEOUT_MS);
-            InstrumentationRegistry.getInstrumentation().waitForIdleSync();
+            sleep(DEFAULT_LPNH_TIMEOUT_MS);
 
             assertThat(mUnderTest.mState).isEqualTo(DelegateInputConsumer.STATE_INACTIVE);
             assertFalse(mLongPressTriggered.get());
@@ -430,9 +411,8 @@
             // Wait past the extended long press timeout, to be sure it wouldn't have triggered.
             float extendedDurationMultiplier =
                     (DeviceConfigWrapper.get().getTwoStageDurationPercentage() / 100f);
-            SystemClock.sleep((long) (DEFAULT_LPNH_TIMEOUT_MS
+            sleep((long) (DEFAULT_LPNH_TIMEOUT_MS
                     * (extendedDurationMultiplier - 1)));  // -1 because we already waited 1x
-            InstrumentationRegistry.getInstrumentation().waitForIdleSync();
 
             assertThat(mUnderTest.mState).isEqualTo(DelegateInputConsumer.STATE_INACTIVE);
             assertFalse(mLongPressTriggered.get());
@@ -450,8 +430,7 @@
     public void testTouchOutsideNavHandleIgnored() {
         // Touch the far left side of the screen. (y=0 is top of navbar region, picked arbitrarily)
         mUnderTest.onMotionEvent(generateMotionEvent(ACTION_DOWN, 0, 0));
-        SystemClock.sleep(DEFAULT_LPNH_TIMEOUT_MS);
-        InstrumentationRegistry.getInstrumentation().waitForIdleSync();
+        sleep(DEFAULT_LPNH_TIMEOUT_MS);
 
         // Should be ignored because the x position was not centered in the navbar region.
         assertThat(mUnderTest.mState).isEqualTo(DelegateInputConsumer.STATE_INACTIVE);
@@ -484,8 +463,7 @@
     @Test
     public void testNoLogsForShortTouch() {
         mUnderTest.onMotionEvent(generateCenteredMotionEvent(ACTION_DOWN));
-        SystemClock.sleep(10);
-        InstrumentationRegistry.getInstrumentation().waitForIdleSync();
+        sleep(10);
         mUnderTest.onMotionEvent(generateCenteredMotionEvent(ACTION_UP));
         verifyNoMoreInteractions(mStatsLogManager);
         verifyNoMoreInteractions(mStatsLogger);
@@ -509,6 +487,11 @@
         mDownTimeMs = 0;
     }
 
+    private static void sleep(long sleepMs) {
+        SystemClock.sleep(sleepMs);
+        InstrumentationRegistry.getInstrumentation().waitForIdleSync();
+    }
+
     /** Generate a motion event centered horizontally in the screen. */
     private MotionEvent generateCenteredMotionEvent(int motionAction) {
         return generateCenteredMotionEventWithYOffset(motionAction, 0);
diff --git a/quickstep/tests/multivalentTests/src/com/android/quickstep/recents/data/TasksRepositoryTest.kt b/quickstep/tests/multivalentTests/src/com/android/quickstep/recents/data/TasksRepositoryTest.kt
index 10be6fd..6790567 100644
--- a/quickstep/tests/multivalentTests/src/com/android/quickstep/recents/data/TasksRepositoryTest.kt
+++ b/quickstep/tests/multivalentTests/src/com/android/quickstep/recents/data/TasksRepositoryTest.kt
@@ -64,7 +64,7 @@
                     /* snapPosition = */ SNAP_TO_2_50_50,
                 ),
             ),
-            DesktopTask(tasks.subList(3, 6)),
+            DesktopTask(deskId = 0, tasks.subList(3, 6)),
         )
     private val recentsModel = FakeRecentTasksDataSource()
     private val taskThumbnailDataSource = FakeTaskThumbnailDataSource()
diff --git a/quickstep/tests/multivalentTests/src/com/android/quickstep/recents/ui/mapper/TaskUiStateMapperTest.kt b/quickstep/tests/multivalentTests/src/com/android/quickstep/recents/ui/mapper/TaskUiStateMapperTest.kt
index 124045f..7ca194a 100644
--- a/quickstep/tests/multivalentTests/src/com/android/quickstep/recents/ui/mapper/TaskUiStateMapperTest.kt
+++ b/quickstep/tests/multivalentTests/src/com/android/quickstep/recents/ui/mapper/TaskUiStateMapperTest.kt
@@ -21,6 +21,7 @@
 import android.graphics.drawable.ShapeDrawable
 import android.platform.test.annotations.EnableFlags
 import android.view.Surface
+import android.view.View
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import com.android.launcher3.Flags
 import com.android.quickstep.recents.ui.viewmodel.TaskData
@@ -43,6 +44,7 @@
                 taskData = null,
                 isLiveTile = false,
                 hasHeader = false,
+                clickCloseListener = null,
             )
         assertThat(result).isEqualTo(TaskThumbnailUiState.Uninitialized)
     }
@@ -57,6 +59,7 @@
                     taskData = input,
                     isLiveTile = true,
                     hasHeader = false,
+                    clickCloseListener = null,
                 )
             assertThat(result).isEqualTo(LiveTile.WithoutHeader)
         }
@@ -72,14 +75,18 @@
                 TASK_DATA.copy(isLocked = true),
                 TASK_DATA.copy(title = null),
             )
+        val closeCallback = View.OnClickListener {}
         val expected =
-            LiveTile.WithHeader(header = ThumbnailHeader(TASK_ICON, TASK_TITLE_DESCRIPTION))
+            LiveTile.WithHeader(
+                header = ThumbnailHeader(TASK_ICON, TASK_TITLE_DESCRIPTION, closeCallback)
+            )
         inputs.forEach { taskData ->
             val result =
                 TaskUiStateMapper.toTaskThumbnailUiState(
                     taskData = taskData,
                     isLiveTile = true,
                     hasHeader = true,
+                    clickCloseListener = closeCallback,
                 )
             assertThat(result).isEqualTo(expected)
         }
@@ -101,6 +108,7 @@
                     taskData = taskData,
                     isLiveTile = true,
                     hasHeader = true,
+                    clickCloseListener = {},
                 )
             assertThat(result).isEqualTo(LiveTile.WithoutHeader)
         }
@@ -113,6 +121,7 @@
                 taskData = TASK_DATA,
                 isLiveTile = false,
                 hasHeader = false,
+                clickCloseListener = null,
             )
 
         val expected =
@@ -133,6 +142,7 @@
     @Test
     fun taskData_isStaticTile_withHeader_returns_SnapshotSplashWithHeader() {
         val inputs = listOf(TASK_DATA, TASK_DATA.copy(title = null))
+        val closeCallback = View.OnClickListener {}
         val expected =
             TaskThumbnailUiState.SnapshotSplash(
                 snapshot =
@@ -140,7 +150,7 @@
                         backgroundColor = TASK_BACKGROUND_COLOR,
                         bitmap = TASK_THUMBNAIL,
                         thumbnailRotation = Surface.ROTATION_0,
-                        header = ThumbnailHeader(TASK_ICON, TASK_TITLE_DESCRIPTION),
+                        header = ThumbnailHeader(TASK_ICON, TASK_TITLE_DESCRIPTION, closeCallback),
                     ),
                 splash = TASK_ICON,
             )
@@ -150,6 +160,7 @@
                     taskData = taskData,
                     isLiveTile = false,
                     hasHeader = true,
+                    clickCloseListener = closeCallback,
                 )
             assertThat(result).isEqualTo(expected)
         }
@@ -176,6 +187,7 @@
                     taskData = taskData,
                     isLiveTile = false,
                     hasHeader = true,
+                    clickCloseListener = {},
                 )
 
             assertThat(result).isInstanceOf(TaskThumbnailUiState.SnapshotSplash::class.java)
@@ -191,6 +203,7 @@
                 taskData = TASK_DATA.copy(thumbnailData = null),
                 isLiveTile = false,
                 hasHeader = false,
+                clickCloseListener = null,
             )
 
         val expected = TaskThumbnailUiState.BackgroundOnly(TASK_BACKGROUND_COLOR)
@@ -204,6 +217,7 @@
                 taskData = TASK_DATA.copy(isLocked = true),
                 isLiveTile = false,
                 hasHeader = false,
+                clickCloseListener = null,
             )
 
         val expected = TaskThumbnailUiState.BackgroundOnly(TASK_BACKGROUND_COLOR)
@@ -212,6 +226,7 @@
 
     private companion object {
         const val TASK_TITLE_DESCRIPTION = "Title Description 1"
+        var TASK_ID = 1
         val TASK_ICON = ShapeDrawable()
         val TASK_THUMBNAIL = Bitmap.createBitmap(1, 1, Bitmap.Config.ARGB_8888)
         val TASK_THUMBNAIL_DATA =
@@ -219,7 +234,7 @@
         val TASK_BACKGROUND_COLOR = Color.rgb(1, 2, 3)
         val TASK_DATA =
             TaskData.Data(
-                1,
+                TASK_ID,
                 title = "Task 1",
                 titleDescription = TASK_TITLE_DESCRIPTION,
                 icon = TASK_ICON,
diff --git a/quickstep/tests/multivalentTests/src/com/android/quickstep/util/DesktopTaskTest.kt b/quickstep/tests/multivalentTests/src/com/android/quickstep/util/DesktopTaskTest.kt
index 7aed579..6fbf482 100644
--- a/quickstep/tests/multivalentTests/src/com/android/quickstep/util/DesktopTaskTest.kt
+++ b/quickstep/tests/multivalentTests/src/com/android/quickstep/util/DesktopTaskTest.kt
@@ -29,35 +29,42 @@
 
     @Test
     fun testDesktopTask_sameInstance_isEqual() {
-        val task = DesktopTask(createTasks(1))
+        val task = DesktopTask(deskId = 0, createTasks(1))
         assertThat(task).isEqualTo(task)
     }
 
     @Test
     fun testDesktopTask_identicalConstructor_isEqual() {
-        val task1 = DesktopTask(createTasks(1))
-        val task2 = DesktopTask(createTasks(1))
+        val task1 = DesktopTask(deskId = 0, createTasks(1))
+        val task2 = DesktopTask(deskId = 0, createTasks(1))
         assertThat(task1).isEqualTo(task2)
     }
 
     @Test
     fun testDesktopTask_copy_isEqual() {
-        val task1 = DesktopTask(createTasks(1))
+        val task1 = DesktopTask(deskId = 0, createTasks(1))
         val task2 = task1.copy()
         assertThat(task1).isEqualTo(task2)
     }
 
     @Test
-    fun testDesktopTask_differentId_isNotEqual() {
-        val task1 = DesktopTask(createTasks(1))
-        val task2 = DesktopTask(createTasks(2))
+    fun testDesktopTask_differentDeskIds_isNotEqual() {
+        val task1 = DesktopTask(deskId = 0, createTasks(1))
+        val task2 = DesktopTask(deskId = 1, createTasks(1))
+        assertThat(task1).isNotEqualTo(task2)
+    }
+
+    @Test
+    fun testDesktopTask_differentTaskIds_isNotEqual() {
+        val task1 = DesktopTask(deskId = 0, createTasks(1))
+        val task2 = DesktopTask(deskId = 0, createTasks(2))
         assertThat(task1).isNotEqualTo(task2)
     }
 
     @Test
     fun testDesktopTask_differentLength_isNotEqual() {
-        val task1 = DesktopTask(createTasks(1))
-        val task2 = DesktopTask(createTasks(1, 2))
+        val task1 = DesktopTask(deskId = 0, createTasks(1))
+        val task2 = DesktopTask(deskId = 0, createTasks(1, 2))
         assertThat(task1).isNotEqualTo(task2)
     }
 
diff --git a/quickstep/tests/multivalentTests/src/com/android/quickstep/util/GroupTaskTest.kt b/quickstep/tests/multivalentTests/src/com/android/quickstep/util/GroupTaskTest.kt
index fa043b9..67fc62f 100644
--- a/quickstep/tests/multivalentTests/src/com/android/quickstep/util/GroupTaskTest.kt
+++ b/quickstep/tests/multivalentTests/src/com/android/quickstep/util/GroupTaskTest.kt
@@ -98,7 +98,7 @@
     @Test
     fun testGroupTask_differentType_isNotEqual() {
         val task1 = SingleTask(createTask(1))
-        val task2 = DesktopTask(listOf(createTask(1)))
+        val task2 = DesktopTask(deskId = 0, listOf(createTask(1)))
         assertThat(task1).isNotEqualTo(task2)
     }
 
diff --git a/res/drawable/private_space_install_app_icon.xml b/res/drawable/private_space_install_app_icon.xml
index cfec2b1..1e7fe43 100644
--- a/res/drawable/private_space_install_app_icon.xml
+++ b/res/drawable/private_space_install_app_icon.xml
@@ -13,19 +13,7 @@
   ~ See the License for the specific language governing permissions and
   ~ limitations under the License.
   -->
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="60dp"
-    android:height="60dp"
-    android:viewportWidth="60"
-    android:viewportHeight="60">
-    <group>
-        <clip-path
-            android:pathData="M30 0H30A30 30 0 0 1 60 30V30A30 30 0 0 1 30 60H30A30 30 0 0 1 0 30V30A30 30 0 0 1 30 0Z" />
-        <path
-            android:pathData="M30 0H30A30 30 0 0 1 60 30V30A30 30 0 0 1 30 60H30A30 30 0 0 1 0 30V30A30 30 0 0 1 30 0Z"
-            android:fillColor="@color/material_color_surface_container_lowest" />
-        <path
-            android:pathData="M29 31h-6v-2h6v-6h2v6h6v2h-6v6h-2v-6Z"
-            android:fillColor="@color/material_color_on_surface" />
-    </group>
-</vector>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/material_color_surface_container_lowest"/>
+    <foreground android:drawable="@drawable/private_space_install_app_icon_foreground" />
+</adaptive-icon>
diff --git a/res/drawable/private_space_install_app_icon_foreground.xml b/res/drawable/private_space_install_app_icon_foreground.xml
new file mode 100644
index 0000000..d55abe7
--- /dev/null
+++ b/res/drawable/private_space_install_app_icon_foreground.xml
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+  ~ Copyright (C) 2025 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.
+  -->
+
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="60dp"
+    android:height="60dp"
+    android:viewportWidth="60"
+    android:viewportHeight="60">
+    <path
+        android:pathData="M29 31h-6v-2h6v-6h2v6h6v2h-6v6h-2v-6Z"
+        android:fillColor="@color/material_color_on_surface" />
+</vector>
diff --git a/src/com/android/launcher3/graphics/GridCustomizationsProxy.java b/src/com/android/launcher3/graphics/GridCustomizationsProxy.java
index 01c9d7e..062c753 100644
--- a/src/com/android/launcher3/graphics/GridCustomizationsProxy.java
+++ b/src/com/android/launcher3/graphics/GridCustomizationsProxy.java
@@ -377,7 +377,9 @@
                     if (Flags.newCustomizationPickerUi()
                             && com.android.launcher3.Flags.enableLauncherIconShapes()) {
                         String shapeKey = message.getData().getString(KEY_SHAPE_KEY);
-                        renderer.updateShape(shapeKey);
+                        if (!TextUtils.isEmpty(shapeKey)) {
+                            renderer.updateShape(shapeKey);
+                        }
                     }
                     break;
                 case MESSAGE_ID_UPDATE_GRID:
diff --git a/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java b/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java
index 332a6bb..740b87b 100644
--- a/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java
+++ b/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java
@@ -28,6 +28,7 @@
 import static com.android.launcher3.LauncherSettings.Favorites.CONTAINER_HOTSEAT;
 import static com.android.launcher3.LauncherSettings.Favorites.CONTAINER_HOTSEAT_PREDICTION;
 import static com.android.launcher3.Utilities.SHOULD_SHOW_FIRST_PAGE_WIDGET;
+import static com.android.launcher3.graphics.ThemeManager.PREF_ICON_SHAPE;
 import static com.android.launcher3.model.ModelUtils.currentScreenContentFilter;
 
 import android.app.Fragment;
@@ -137,12 +138,13 @@
 
         private final String mPrefName;
 
-        public PreviewContext(Context base, String gridName) {
+        public PreviewContext(Context base, String gridName, String shapeKey) {
             super(base);
             mPrefName = "preview-" + UUID.randomUUID().toString();
             LauncherPrefs prefs =
                     new ProxyPrefs(this, getSharedPreferences(mPrefName, MODE_PRIVATE));
             prefs.put(GRID_NAME, gridName);
+            prefs.put(PREF_ICON_SHAPE, shapeKey);
             initDaggerComponent(
                     DaggerLauncherPreviewRenderer_PreviewAppComponent.builder().bindPrefs(prefs));
         }
diff --git a/src/com/android/launcher3/graphics/PreviewSurfaceRenderer.java b/src/com/android/launcher3/graphics/PreviewSurfaceRenderer.java
index 6fe5804..4dd9c5b 100644
--- a/src/com/android/launcher3/graphics/PreviewSurfaceRenderer.java
+++ b/src/com/android/launcher3/graphics/PreviewSurfaceRenderer.java
@@ -73,7 +73,6 @@
 
 import java.util.ArrayList;
 import java.util.Map;
-import java.util.Objects;
 import java.util.concurrent.TimeUnit;
 
 /** Render preview using surface view. */
@@ -120,6 +119,7 @@
         if (mGridName == null) {
             mGridName = LauncherPrefs.get(context).get(GRID_NAME);
         }
+        mShapeKey = LauncherPrefs.get(context).get(PREF_ICON_SHAPE);
         mWallpaperColors = bundle.getParcelable(KEY_COLORS);
         if (Flags.newCustomizationPickerUi()) {
             updateColorOverrides(bundle);
@@ -225,8 +225,8 @@
      *
      * @param shapeKey key for the IconShape model
      */
-    public void updateShape(@Nullable String shapeKey) {
-        if (Objects.equals(mShapeKey, shapeKey)) {
+    public void updateShape(String shapeKey) {
+        if (shapeKey.equals(mShapeKey)) {
             Log.w(TAG, "Preview shape already set, skipping. shape=" + mShapeKey);
             return;
         }
@@ -332,12 +332,10 @@
     private void loadModelData() {
         final Context inflationContext = getPreviewContext();
         if (!mGridName.equals(LauncherPrefs.INSTANCE.get(mContext).get(GRID_NAME))
-                || mShapeKey != null) {
+                || !mShapeKey.equals(LauncherPrefs.INSTANCE.get(mContext).get(PREF_ICON_SHAPE))) {
             // Start the migration
-            PreviewContext previewContext = new PreviewContext(inflationContext, mGridName);
-            if (mShapeKey != null) {
-                LauncherPrefs.INSTANCE.get(previewContext).put(PREF_ICON_SHAPE, mShapeKey);
-            }
+            PreviewContext previewContext =
+                    new PreviewContext(inflationContext, mGridName, mShapeKey);
             // Copy existing data to preview DB
             LauncherDbUtils.copyTable(LauncherAppState.getInstance(mContext)
                             .getModel().getModelDbController().getDb(),
diff --git a/src/com/android/launcher3/util/SplitConfigurationOptions.java b/src/com/android/launcher3/util/SplitConfigurationOptions.java
index 44a7c6f..e1ef77a 100644
--- a/src/com/android/launcher3/util/SplitConfigurationOptions.java
+++ b/src/com/android/launcher3/util/SplitConfigurationOptions.java
@@ -127,10 +127,10 @@
         /** This rect represents the actual gap between the two apps */
         public final Rect visualDividerBounds;
         // This class is orientation-agnostic, so we compute both for later use
-        public final float topTaskPercent;
-        public final float leftTaskPercent;
-        public final float dividerWidthPercent;
-        public final float dividerHeightPercent;
+        private final float topTaskPercent;
+        private final float leftTaskPercent;
+        private final float dividerWidthPercent;
+        private final float dividerHeightPercent;
         public final int snapPosition;
 
         /**
@@ -190,6 +190,39 @@
             dividerHeightPercent = visualDividerBounds.height() / totalHeight;
         }
 
+        /**
+         * Returns the percentage size of the left/top task (compared to the full width/height of
+         * the split pair). E.g. if the left task is 4 units wide, the divider is 2 units, and the
+         * right task is 4 units, this method will return 0.4f.
+         */
+        public float getLeftTopTaskPercent() {
+            // topTaskPercent and leftTaskPercent are defined at creation time, and are not updated
+            // on device rotate, so we have to check appsStackedVertically to return the right
+            // creation-time measurements.
+            return appsStackedVertically ? topTaskPercent : leftTaskPercent;
+        }
+
+        /**
+         * Returns the percentage size of the divider's thickness (compared to the full width/height
+         * of the split pair). E.g. if the left task is 4 units wide, the divider is 2 units, and
+         * the right task is 4 units, this method will return 0.2f.
+         */
+        public float getDividerPercent() {
+            // dividerHeightPercent and dividerWidthPercent are defined at creation time, and are
+            // not updated on device rotate, so we have to check appsStackedVertically to return
+            // the right creation-time measurements.
+            return appsStackedVertically ? dividerHeightPercent : dividerWidthPercent;
+        }
+
+        /**
+         * Returns the percentage size of the right/bottom task (compared to the full width/height
+         * of the split pair). E.g. if the left task is 4 units wide, the divider is 2 units, and
+         * the right task is 4 units, this method will return 0.4f.
+         */
+        public float getRightBottomTaskPercent() {
+            return 1 - (getLeftTopTaskPercent() + getDividerPercent());
+        }
+
         @Override
         public String toString() {
             return "LeftTop: " + leftTopBounds + ", taskId: " + leftTopTaskId + "\n"