diff --git a/protos/launcher_atom.proto b/protos/launcher_atom.proto
index 63ea20c..f8b08f8 100644
--- a/protos/launcher_atom.proto
+++ b/protos/launcher_atom.proto
@@ -135,7 +135,7 @@
   }
 }
 
-// Next value 51
+// Next value 52
 enum Attribute {
   option allow_alias = true;
 
@@ -187,6 +187,7 @@
   ALL_APPS_SEARCH_RESULT_SYSTEM_POINTER = 42;
   ALL_APPS_SEARCH_RESULT_EDUCARD = 43;
   ALL_APPS_SEARCH_RESULT_LOCATION = 50;
+  ALL_APPS_SEARCH_RESULT_TEXT_HEADER = 51;
 
   // Result sources
   DATA_SOURCE_APPSEARCH_APP_PREVIEW = 45;
diff --git a/quickstep/src/com/android/launcher3/hybridhotseat/HotseatEduDialog.java b/quickstep/src/com/android/launcher3/hybridhotseat/HotseatEduDialog.java
index 5691ecf..db225be 100644
--- a/quickstep/src/com/android/launcher3/hybridhotseat/HotseatEduDialog.java
+++ b/quickstep/src/com/android/launcher3/hybridhotseat/HotseatEduDialog.java
@@ -158,11 +158,11 @@
     }
 
     private void animateOpen() {
-        if (mIsOpen || mOpenCloseAnimator.isRunning()) {
+        if (mIsOpen || mOpenCloseAnimation.getAnimationPlayer().isRunning()) {
             return;
         }
         mIsOpen = true;
-        setUpDefaultOpenAnimator().start();
+        setUpDefaultOpenAnimation().start();
     }
 
     @Override
diff --git a/quickstep/src/com/android/launcher3/taskbar/allapps/TaskbarAllAppsSlideInView.java b/quickstep/src/com/android/launcher3/taskbar/allapps/TaskbarAllAppsSlideInView.java
index 3fe7359..537d2c6 100644
--- a/quickstep/src/com/android/launcher3/taskbar/allapps/TaskbarAllAppsSlideInView.java
+++ b/quickstep/src/com/android/launcher3/taskbar/allapps/TaskbarAllAppsSlideInView.java
@@ -17,11 +17,13 @@
 
 import static com.android.app.animation.Interpolators.EMPHASIZED;
 
+import android.animation.Animator;
 import android.content.Context;
 import android.graphics.Canvas;
 import android.graphics.Rect;
 import android.util.AttributeSet;
 import android.view.MotionEvent;
+import android.view.View;
 import android.view.animation.Interpolator;
 import android.window.OnBackInvokedDispatcher;
 
@@ -29,6 +31,7 @@
 import com.android.launcher3.Insettable;
 import com.android.launcher3.R;
 import com.android.launcher3.anim.AnimatorListeners;
+import com.android.launcher3.anim.PendingAnimation;
 import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.taskbar.allapps.TaskbarAllAppsViewController.TaskbarAllAppsCallbacks;
 import com.android.launcher3.taskbar.overlay.TaskbarOverlayContext;
@@ -58,22 +61,50 @@
 
     /** Opens the all apps view. */
     void show(boolean animate) {
-        if (mIsOpen || mOpenCloseAnimator.isRunning()) {
+        if (mIsOpen || mOpenCloseAnimation.getAnimationPlayer().isRunning()) {
             return;
         }
         mIsOpen = true;
         attachToContainer();
-        mAllAppsCallbacks.onAllAppsTransitionStart(true);
 
-        if (animate) {
-            setUpOpenCloseAnimator(TRANSLATION_SHIFT_OPENED, EMPHASIZED);
-            mOpenCloseAnimator.addListener(AnimatorListeners.forEndCallback(
-                    () -> mAllAppsCallbacks.onAllAppsTransitionEnd(true)));
-            mOpenCloseAnimator.setDuration(mAllAppsCallbacks.getOpenDuration()).start();
-        } else {
-            mTranslationShift = TRANSLATION_SHIFT_OPENED;
+        addOnAttachStateChangeListener(new OnAttachStateChangeListener() {
+            @Override
+            public void onViewAttachedToWindow(View v) {
+                removeOnAttachStateChangeListener(this);
+                // Wait for view and its descendants to be fully attached before starting open.
+                post(() -> showOnFullyAttachedToWindow(animate));
+            }
+
+            @Override
+            public void onViewDetachedFromWindow(View v) {
+                removeOnAttachStateChangeListener(this);
+            }
+        });
+    }
+
+    private void showOnFullyAttachedToWindow(boolean animate) {
+        mAllAppsCallbacks.onAllAppsTransitionStart(true);
+        if (!animate) {
             mAllAppsCallbacks.onAllAppsTransitionEnd(true);
+            mTranslationShift = TRANSLATION_SHIFT_OPENED;
+            return;
         }
+
+        setUpOpenAnimation(mAllAppsCallbacks.getOpenDuration());
+        Animator animator = mOpenCloseAnimation.getAnimationPlayer();
+        animator.setInterpolator(EMPHASIZED);
+        animator.addListener(AnimatorListeners.forEndCallback(() -> {
+            if (mIsOpen) {
+                mAllAppsCallbacks.onAllAppsTransitionEnd(true);
+            }
+        }));
+        animator.start();
+    }
+
+    @Override
+    protected void onOpenCloseAnimationPending(PendingAnimation animation) {
+        mAllAppsCallbacks.onAllAppsAnimationPending(
+                animation, mToTranslationShift == TRANSLATION_SHIFT_OPENED);
     }
 
     /** The apps container inside this view. */
diff --git a/quickstep/src/com/android/launcher3/taskbar/allapps/TaskbarAllAppsViewController.java b/quickstep/src/com/android/launcher3/taskbar/allapps/TaskbarAllAppsViewController.java
index f43169b..85633e9 100644
--- a/quickstep/src/com/android/launcher3/taskbar/allapps/TaskbarAllAppsViewController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/allapps/TaskbarAllAppsViewController.java
@@ -20,6 +20,7 @@
 
 import com.android.launcher3.AbstractFloatingView;
 import com.android.launcher3.allapps.AllAppsTransitionListener;
+import com.android.launcher3.anim.PendingAnimation;
 import com.android.launcher3.appprediction.AppsDividerView;
 import com.android.launcher3.taskbar.NavbarButtonsViewController;
 import com.android.launcher3.taskbar.TaskbarControllers;
@@ -125,5 +126,9 @@
         boolean handleSearchBackInvoked() {
             return mSearchSessionController.handleBackInvoked();
         }
+
+        void onAllAppsAnimationPending(PendingAnimation animation, boolean toAllApps) {
+            mSearchSessionController.onAllAppsAnimationPending(animation, toAllApps);
+        }
     }
 }
diff --git a/quickstep/src/com/android/launcher3/taskbar/allapps/TaskbarSearchSessionController.kt b/quickstep/src/com/android/launcher3/taskbar/allapps/TaskbarSearchSessionController.kt
index c26977f..8a2041f 100644
--- a/quickstep/src/com/android/launcher3/taskbar/allapps/TaskbarSearchSessionController.kt
+++ b/quickstep/src/com/android/launcher3/taskbar/allapps/TaskbarSearchSessionController.kt
@@ -20,6 +20,7 @@
 import android.view.View
 import com.android.launcher3.R
 import com.android.launcher3.allapps.AllAppsTransitionListener
+import com.android.launcher3.anim.PendingAnimation
 import com.android.launcher3.config.FeatureFlags
 import com.android.launcher3.dragndrop.DragOptions.PreDragCondition
 import com.android.launcher3.model.data.ItemInfo
@@ -50,6 +51,8 @@
 
     open fun handleBackInvoked(): Boolean = false
 
+    open fun onAllAppsAnimationPending(animation: PendingAnimation, toAllApps: Boolean) = Unit
+
     companion object {
         @JvmStatic
         fun newInstance(context: Context): TaskbarSearchSessionController {
diff --git a/quickstep/src/com/android/quickstep/interaction/AllSetActivity.java b/quickstep/src/com/android/quickstep/interaction/AllSetActivity.java
index f11bc81..49814df 100644
--- a/quickstep/src/com/android/quickstep/interaction/AllSetActivity.java
+++ b/quickstep/src/com/android/quickstep/interaction/AllSetActivity.java
@@ -95,9 +95,10 @@
 
     private static final float ANIMATION_PAUSE_ALPHA_THRESHOLD = 0.1f;
 
+    private final AnimatedFloat mSwipeProgress = new AnimatedFloat(this::onSwipeProgressUpdate);
+
     private TISBindHelper mTISBindHelper;
 
-    private final AnimatedFloat mSwipeProgress = new AnimatedFloat(this::onSwipeProgressUpdate);
     private BgDrawable mBackground;
     private View mRootView;
     private float mSwipeUpShift;
@@ -172,7 +173,7 @@
                         LOTTIE_TERTIARY_COLOR_TOKEN, R.color.all_set_bg_tertiary),
                 getTheme());
 
-        startBackgroundAnimation();
+        startBackgroundAnimation(dp.isTablet);
     }
 
     private void runOnUiHelperThread(Runnable runnable) {
@@ -183,7 +184,7 @@
         Executors.UI_HELPER_EXECUTOR.execute(runnable);
     }
 
-    private void startBackgroundAnimation() {
+    private void startBackgroundAnimation(boolean forTablet) {
         if (!Utilities.ATLEAST_S || mVibrator == null) {
             return;
         }
@@ -199,7 +200,7 @@
                     .addPrimitive(supportsThud
                                     ? VibrationEffect.Composition.PRIMITIVE_THUD
                                     : VibrationEffect.Composition.PRIMITIVE_TICK,
-                            /* scale= */ 1.0f,
+                            /* scale= */ forTablet ? 1.0f : 0.3f,
                             /* delay= */ 50)
                     .compose();
 
diff --git a/res/values/attrs.xml b/res/values/attrs.xml
index 4d75fb8..05eaf88 100644
--- a/res/values/attrs.xml
+++ b/res/values/attrs.xml
@@ -202,6 +202,7 @@
         <attr name="demoModeLayoutId" format="reference" />
         <attr name="isScalable" format="boolean" />
         <attr name="devicePaddingId" format="reference" />
+
         <!-- File that contains the specs for the workspace.
         Needs FeatureFlags.ENABLE_RESPONSIVE_WORKSPACE enabled -->
         <attr name="workspaceSpecsId" format="reference" />
@@ -210,11 +211,14 @@
         Needs FeatureFlags.ENABLE_RESPONSIVE_WORKSPACE enabled -->
         <attr name="allAppsSpecsId" format="reference" />
         <attr name="allAppsSpecsTwoPanelId" format="reference" />
-
         <!-- File that contains the specs for the workspace.
         Needs FeatureFlags.ENABLE_RESPONSIVE_WORKSPACE enabled -->
         <attr name="folderSpecsId" format="reference" />
         <attr name="folderSpecsTwoPanelId" format="reference" />
+        <!-- File that contains the specs for hotseat bar.
+        Needs FeatureFlags.ENABLE_RESPONSIVE_WORKSPACE enabled -->
+        <attr name="hotseatSpecsId" format="reference" />
+        <attr name="hotseatSpecsTwoPanelId" format="reference" />
 
         <!-- By default all categories are enabled -->
         <attr name="deviceCategory" format="integer">
@@ -278,6 +282,11 @@
         <attr name="maxAvailableSize" />
     </declare-styleable>
 
+    <declare-styleable name="HotseatSpec">
+        <attr name="specType" />
+        <attr name="maxAvailableSize" />
+    </declare-styleable>
+
     <declare-styleable name="SizeSpec">
         <attr name="fixedSize" format="dimension" />
         <attr name="ofAvailableSpace" format="float" />
diff --git a/src/com/android/launcher3/AppWidgetResizeFrame.java b/src/com/android/launcher3/AppWidgetResizeFrame.java
index 9a1ccd0..7131452 100644
--- a/src/com/android/launcher3/AppWidgetResizeFrame.java
+++ b/src/com/android/launcher3/AppWidgetResizeFrame.java
@@ -360,6 +360,37 @@
             lp.y = sTmpRect.top;
         }
 
+        // Handle invalid resize across CellLayouts in the two panel UI.
+        if (mCellLayout.getParent() instanceof Workspace) {
+            Workspace<?> workspace = (Workspace<?>) mCellLayout.getParent();
+            CellLayout pairedCellLayout = workspace.getScreenPair(mCellLayout);
+            if (pairedCellLayout != null) {
+                Rect focusedCellLayoutBound = sTmpRect;
+                mDragLayerRelativeCoordinateHelper.viewToRect(mCellLayout, focusedCellLayoutBound);
+                Rect resizeFrameBound = sTmpRect2;
+                findViewById(R.id.widget_resize_frame).getGlobalVisibleRect(resizeFrameBound);
+                float progress = 1f;
+                if (workspace.indexOfChild(pairedCellLayout) < workspace.indexOfChild(mCellLayout)
+                        && mDeltaX < 0
+                        && resizeFrameBound.left < focusedCellLayoutBound.left) {
+                    // Resize from right to left.
+                    progress = (mDragAcrossTwoPanelOpacityMargin + mDeltaX)
+                            / mDragAcrossTwoPanelOpacityMargin;
+                } else if (workspace.indexOfChild(pairedCellLayout)
+                                > workspace.indexOfChild(mCellLayout)
+                        && mDeltaX > 0
+                        && resizeFrameBound.right > focusedCellLayoutBound.right) {
+                    // Resize from left to right.
+                    progress = (mDragAcrossTwoPanelOpacityMargin - mDeltaX)
+                            / mDragAcrossTwoPanelOpacityMargin;
+                }
+                float alpha = Math.max(MIN_OPACITY_FOR_CELL_LAYOUT_DURING_INVALID_RESIZE, progress);
+                float springLoadedProgress = Math.min(1f, 1f - progress);
+                updateInvalidResizeEffect(mCellLayout, pairedCellLayout, alpha,
+                        springLoadedProgress);
+            }
+        }
+
         requestLayout();
     }
 
@@ -516,6 +547,13 @@
         }
 
         final DragLayer.LayoutParams lp = (DragLayer.LayoutParams) getLayoutParams();
+        final CellLayout pairedCellLayout;
+        if (mCellLayout.getParent() instanceof Workspace) {
+            Workspace<?> workspace = (Workspace<?>) mCellLayout.getParent();
+            pairedCellLayout = workspace.getScreenPair(mCellLayout);
+        } else {
+            pairedCellLayout = null;
+        }
         if (!animate) {
             lp.width = newWidth;
             lp.height = newHeight;
@@ -524,6 +562,10 @@
             for (int i = 0; i < HANDLE_COUNT; i++) {
                 mDragHandles[i].setAlpha(1f);
             }
+            if (pairedCellLayout != null) {
+                updateInvalidResizeEffect(mCellLayout, pairedCellLayout, /* alpha= */ 1f,
+                        /* springLoadedProgress= */ 0f);
+            }
             requestLayout();
         } else {
             ObjectAnimator oa = ObjectAnimator.ofPropertyValuesHolder(lp,
@@ -539,6 +581,10 @@
                 set.play(mFirstFrameAnimatorHelper.addTo(
                         ObjectAnimator.ofFloat(mDragHandles[i], ALPHA, 1f)));
             }
+            if (pairedCellLayout != null) {
+                updateInvalidResizeEffect(mCellLayout, pairedCellLayout, /* alpha= */ 1f,
+                        /* springLoadedProgress= */ 0f, /* animatorSet= */ set);
+            }
             set.setDuration(SNAP_DURATION);
             set.start();
         }
diff --git a/src/com/android/launcher3/DeviceProfile.java b/src/com/android/launcher3/DeviceProfile.java
index 83de98a..7ece9a4 100644
--- a/src/com/android/launcher3/DeviceProfile.java
+++ b/src/com/android/launcher3/DeviceProfile.java
@@ -56,8 +56,10 @@
 import com.android.launcher3.responsive.AllAppsSpecs;
 import com.android.launcher3.responsive.CalculatedAllAppsSpec;
 import com.android.launcher3.responsive.CalculatedFolderSpec;
+import com.android.launcher3.responsive.CalculatedHotseatSpec;
 import com.android.launcher3.responsive.CalculatedWorkspaceSpec;
 import com.android.launcher3.responsive.FolderSpecs;
+import com.android.launcher3.responsive.HotseatSpecs;
 import com.android.launcher3.responsive.WorkspaceSpecs;
 import com.android.launcher3.uioverrides.ApiWrapper;
 import com.android.launcher3.util.DisplayController;
@@ -121,6 +123,7 @@
     private CalculatedAllAppsSpec mAllAppsResponsiveHeightSpec;
     private CalculatedFolderSpec mResponsiveFolderWidthSpec;
     private CalculatedFolderSpec mResponsiveFolderHeightSpec;
+    private CalculatedHotseatSpec mResponsiveHotseatSpec;
 
     /**
      * The maximum amount of left/right workspace padding as a percentage of the screen width.
@@ -316,7 +319,8 @@
         // TODO(b/241386436): shouldn't change any launcher behaviour
         mIsResponsiveGrid = inv.workspaceSpecsId != INVALID_RESOURCE_HANDLE
                 && inv.allAppsSpecsId != INVALID_RESOURCE_HANDLE
-                && inv.folderSpecsId != INVALID_RESOURCE_HANDLE;
+                && inv.folderSpecsId != INVALID_RESOURCE_HANDLE
+                && inv.hotseatSpecsId != INVALID_RESOURCE_HANDLE;
 
         mIsScalableGrid = inv.isScalable && !isVerticalBarLayout() && !isMultiWindowMode;
         // Determine device posture.
@@ -495,7 +499,17 @@
 
         int hotseatBarBottomSpace = pxFromDp(inv.hotseatBarBottomSpace[mTypeIndex], mMetrics);
         int minQsbMargin = res.getDimensionPixelSize(R.dimen.min_qsb_margin);
-        hotseatQsbSpace = pxFromDp(inv.hotseatQsbSpace[mTypeIndex], mMetrics);
+
+        if (mIsResponsiveGrid) {
+            HotseatSpecs hotseatSpecs =
+                    HotseatSpecs.create(new ResourceHelper(context,
+                            isTwoPanels ? inv.hotseatSpecsTwoPanelId : inv.hotseatSpecsId));
+            mResponsiveHotseatSpec = hotseatSpecs.getCalculatedHeightSpec(heightPx);
+            hotseatQsbSpace = mResponsiveHotseatSpec.getHotseatQsbSpace();
+        } else {
+            hotseatQsbSpace = pxFromDp(inv.hotseatQsbSpace[mTypeIndex], mMetrics);
+        }
+
         // Have a little space between the inset and the QSB
         if (mInsets.bottom + minQsbMargin > hotseatBarBottomSpace) {
             int availableSpace = hotseatQsbSpace - (mInsets.bottom - hotseatBarBottomSpace);
@@ -618,6 +632,10 @@
         // Hotseat and QSB width depends on updated cellSize and workspace padding
         recalculateHotseatWidthAndBorderSpace();
 
+        if (mIsResponsiveGrid && isVerticalBarLayout()) {
+            hotseatBorderSpace = cellLayoutBorderSpacePx.y;
+        }
+
         // AllApps height calculation depends on updated cellSize
         if (isTablet) {
             int collapseHandleHeight =
@@ -717,7 +735,7 @@
     /** Updates hotseatCellHeightPx and hotseatBarSizePx */
     private void updateHotseatSizes(int hotseatIconSizePx) {
         // Ensure there is enough space for folder icons, which have a slightly larger radius.
-        hotseatCellHeightPx = (int) Math.ceil(hotseatIconSizePx * ICON_OVERLAP_FACTOR);
+        hotseatCellHeightPx = getIconSizeWithOverlap(hotseatIconSizePx);
 
         if (isVerticalBarLayout()) {
             hotseatBarSizePx = hotseatIconSizePx + hotseatBarSidePaddingStartPx
@@ -783,7 +801,6 @@
             hotseatBorderSpace = calculateHotseatBorderSpace(maxHotseatIconsWidthPx,
                     (isQsbInline ? 1 : 0) + /* border between nav buttons and first icon */ 1);
         } while (hotseatBorderSpace < mMinHotseatIconSpacePx && numShownHotseatIcons > 1);
-
     }
 
     private Point getCellLayoutBorderSpace(InvariantDeviceProfile idp) {
@@ -866,11 +883,24 @@
         float workspaceCellPaddingY = getCellSize().y - iconSizePx - iconDrawablePaddingPx
                 - iconTextHeight;
 
+        if (mIsResponsiveGrid) {
+            // Hide text only if doesn't fit inside the cell for responsive grid
+            if (workspaceCellPaddingY < 0) {
+                iconTextSizePx = 0;
+                iconDrawablePaddingPx = 0;
+                int iconSizeWithOverlap = getIconSizeWithOverlap(iconSizePx);
+                cellYPaddingPx = Math.max(0, getCellSize().y - iconSizeWithOverlap) / 2;
+                autoResizeAllAppsCells();
+            }
+
+            return;
+        }
+
         // We want enough space so that the text is closer to its corresponding icon.
         if (workspaceCellPaddingY < iconTextHeight) {
             iconTextSizePx = 0;
             iconDrawablePaddingPx = 0;
-            cellHeightPx = (int) Math.ceil(iconSizePx * ICON_OVERLAP_FACTOR);
+            cellHeightPx = getIconSizeWithOverlap(iconSizePx);
             autoResizeAllAppsCells();
         }
     }
@@ -950,6 +980,10 @@
         return Math.max(0, drawablePadding - iconSizeDiff / 2);
     }
 
+    private int getIconSizeWithOverlap(int iconSize) {
+        return (int) Math.ceil(iconSize * ICON_OVERLAP_FACTOR);
+    }
+
     /**
      * Updating the iconSize affects many aspects of the launcher layout, such as: iconSizePx,
      * iconTextSizePx, iconDrawablePaddingPx, cellWidth/Height, allApps* variants,
@@ -1052,7 +1086,7 @@
         } else {
             iconDrawablePaddingPx = (int) (getNormalizedIconDrawablePadding() * iconScale);
             cellWidthPx = iconSizePx + iconDrawablePaddingPx;
-            cellHeightPx = (int) Math.ceil(iconSizePx * ICON_OVERLAP_FACTOR)
+            cellHeightPx = getIconSizeWithOverlap(iconSizePx)
                     + iconDrawablePaddingPx
                     + Utilities.calculateTextHeight(iconTextSizePx);
             int cellPaddingY = (getCellSize().y - cellHeightPx) / 2;
@@ -1107,7 +1141,6 @@
         return Math.min(hotseatBorderSpacePx, mMaxHotseatIconSpacePx);
     }
 
-
     /**
      * Updates the iconSize for allApps* variants.
      */
@@ -1455,14 +1488,26 @@
     private void updateWorkspacePadding() {
         Rect padding = workspacePadding;
         if (isVerticalBarLayout()) {
-            padding.top = 0;
-            padding.bottom = edgeMarginPx;
-            if (isSeascape()) {
-                padding.left = hotseatBarSizePx;
-                padding.right = hotseatBarSidePaddingStartPx;
+            if (mIsResponsiveGrid) {
+                padding.top = mResponsiveHeightSpec.getStartPaddingPx();
+                padding.bottom = mResponsiveHeightSpec.getEndPaddingPx();
+                if (isSeascape()) {
+                    padding.left = hotseatBarSizePx + mResponsiveWidthSpec.getEndPaddingPx();
+                    padding.right = mResponsiveWidthSpec.getStartPaddingPx();
+                } else {
+                    padding.left = mResponsiveWidthSpec.getStartPaddingPx();
+                    padding.right = hotseatBarSizePx + mResponsiveWidthSpec.getEndPaddingPx();
+                }
             } else {
-                padding.left = hotseatBarSidePaddingStartPx;
-                padding.right = hotseatBarSizePx;
+                padding.top = 0;
+                padding.bottom = edgeMarginPx;
+                if (isSeascape()) {
+                    padding.left = hotseatBarSizePx;
+                    padding.right = hotseatBarSidePaddingStartPx;
+                } else {
+                    padding.left = hotseatBarSidePaddingStartPx;
+                    padding.right = hotseatBarSizePx;
+                }
             }
         } else {
             // Pad the bottom of the workspace with hotseat bar
@@ -1505,7 +1550,9 @@
             // in vertical bar layout.
             // Workspace icons are moved up by a small factor. The variable diffOverlapFactor
             // is set to account for that difference.
-            float diffOverlapFactor = iconSizePx * (ICON_OVERLAP_FACTOR - 1) / 2;
+            float diffOverlapFactor = mIsResponsiveGrid ? 0
+                    : iconSizePx * (ICON_OVERLAP_FACTOR - 1) / 2;
+
             int paddingTop = Math.max((int) (mInsets.top + cellLayoutPaddingPx.top
                     - diffOverlapFactor), 0);
             int paddingBottom = Math.max((int) (mInsets.bottom + cellLayoutPaddingPx.bottom
@@ -1952,6 +1999,7 @@
                     + mAllAppsResponsiveWidthSpec.toString());
             writer.println(prefix + "\tmResponsiveFolderHeightSpec:" + mResponsiveFolderHeightSpec);
             writer.println(prefix + "\tmResponsiveFolderWidthSpec:" + mResponsiveFolderWidthSpec);
+            writer.println(prefix + "\tmResponsiveHotseatSpec:" + mResponsiveHotseatSpec);
         }
     }
 
diff --git a/src/com/android/launcher3/InvariantDeviceProfile.java b/src/com/android/launcher3/InvariantDeviceProfile.java
index dac6120..be14844 100644
--- a/src/com/android/launcher3/InvariantDeviceProfile.java
+++ b/src/com/android/launcher3/InvariantDeviceProfile.java
@@ -18,6 +18,7 @@
 
 import static com.android.launcher3.LauncherPrefs.GRID_NAME;
 import static com.android.launcher3.Utilities.dpiFromPx;
+import static com.android.launcher3.config.FeatureFlags.ENABLE_TWO_PANEL_HOME;
 import static com.android.launcher3.testing.shared.ResourceUtils.INVALID_RESOURCE_HANDLE;
 import static com.android.launcher3.util.DisplayController.CHANGE_DENSITY;
 import static com.android.launcher3.util.DisplayController.CHANGE_NAVIGATION_MODE;
@@ -189,6 +190,8 @@
     public int folderSpecsId = INVALID_RESOURCE_HANDLE;
     @XmlRes
     public int folderSpecsTwoPanelId = INVALID_RESOURCE_HANDLE;
+    public int hotseatSpecsId = INVALID_RESOURCE_HANDLE;
+    public int hotseatSpecsTwoPanelId = INVALID_RESOURCE_HANDLE;
 
     public String dbFile;
     public int defaultLayoutId;
@@ -311,7 +314,7 @@
         int type = displayInfo.supportedBounds.stream()
                 .mapToInt(bounds -> displayInfo.isTablet(bounds) ? flagTablet : flagPhone)
                 .reduce(0, (a, b) -> a | b);
-        if ((type == (flagPhone | flagTablet))) {
+        if ((type == (flagPhone | flagTablet)) && ENABLE_TWO_PANEL_HOME.get()) {
             // device has profiles supporting both phone and table modes
             return TYPE_MULTI_DISPLAY;
         } else if (type == flagTablet) {
@@ -368,6 +371,8 @@
         allAppsSpecsTwoPanelId = closestProfile.mAllAppsSpecsTwoPanelId;
         folderSpecsId = closestProfile.mFolderSpecsId;
         folderSpecsTwoPanelId = closestProfile.mFolderSpecsTwoPanelId;
+        hotseatSpecsId = closestProfile.mHotseatSpecsId;
+        hotseatSpecsTwoPanelId = closestProfile.mHotseatSpecsTwoPanelId;
         this.deviceType = deviceType;
 
         inlineNavButtonsEndSpacing = closestProfile.inlineNavButtonsEndSpacing;
@@ -819,6 +824,8 @@
         private final int mAllAppsSpecsTwoPanelId;
         private final int mFolderSpecsId;
         private final int mFolderSpecsTwoPanelId;
+        private final int mHotseatSpecsId;
+        private final int mHotseatSpecsTwoPanelId;
 
         public GridOption(Context context, AttributeSet attrs) {
             TypedArray a = context.obtainStyledAttributes(
@@ -896,6 +903,11 @@
                 mFolderSpecsTwoPanelId = a.getResourceId(
                         R.styleable.GridDisplayOption_folderSpecsTwoPanelId,
                         INVALID_RESOURCE_HANDLE);
+                mHotseatSpecsId = a.getResourceId(
+                        R.styleable.GridDisplayOption_hotseatSpecsId, INVALID_RESOURCE_HANDLE);
+                mHotseatSpecsTwoPanelId = a.getResourceId(
+                        R.styleable.GridDisplayOption_hotseatSpecsTwoPanelId,
+                        INVALID_RESOURCE_HANDLE);
             } else {
                 mWorkspaceSpecsId = INVALID_RESOURCE_HANDLE;
                 mWorkspaceSpecsTwoPanelId = INVALID_RESOURCE_HANDLE;
@@ -903,6 +915,8 @@
                 mAllAppsSpecsTwoPanelId = INVALID_RESOURCE_HANDLE;
                 mFolderSpecsId = INVALID_RESOURCE_HANDLE;
                 mFolderSpecsTwoPanelId = INVALID_RESOURCE_HANDLE;
+                mHotseatSpecsId = INVALID_RESOURCE_HANDLE;
+                mHotseatSpecsTwoPanelId = INVALID_RESOURCE_HANDLE;
             }
 
             int inlineForRotation = a.getInt(R.styleable.GridDisplayOption_inlineQsb,
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index c737074..d0a2576 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -44,6 +44,7 @@
 import static com.android.launcher3.LauncherState.SPRING_LOADED;
 import static com.android.launcher3.Utilities.postAsyncCallback;
 import static com.android.launcher3.accessibility.LauncherAccessibilityDelegate.getSupportedActions;
+import static com.android.launcher3.config.FeatureFlags.FOLDABLE_SINGLE_PAGE;
 import static com.android.launcher3.config.FeatureFlags.MULTI_SELECT_EDIT_MODE;
 import static com.android.launcher3.config.FeatureFlags.SHOW_DOT_PAGINATION;
 import static com.android.launcher3.logging.StatsLogManager.EventEnum;
@@ -766,7 +767,7 @@
         }
 
         onDeviceProfileInitiated();
-        if (mDeviceProfile.isTwoPanels) {
+        if (FOLDABLE_SINGLE_PAGE.get() && mDeviceProfile.isTwoPanels) {
             mCellPosMapper = new TwoPanelCellPosMapper(mDeviceProfile.inv.numColumns);
         } else {
             mCellPosMapper = CellPosMapper.DEFAULT;
diff --git a/src/com/android/launcher3/Workspace.java b/src/com/android/launcher3/Workspace.java
index b141e18..adaf20f 100644
--- a/src/com/android/launcher3/Workspace.java
+++ b/src/com/android/launcher3/Workspace.java
@@ -28,6 +28,7 @@
 import static com.android.launcher3.LauncherState.SPRING_LOADED;
 import static com.android.launcher3.MotionEventsUtils.isTrackpadMultiFingerSwipe;
 import static com.android.launcher3.anim.AnimatorListeners.forSuccessCallback;
+import static com.android.launcher3.config.FeatureFlags.FOLDABLE_SINGLE_PAGE;
 import static com.android.launcher3.logging.StatsLogManager.LAUNCHER_STATE_HOME;
 import static com.android.launcher3.logging.StatsLogManager.LauncherEvent.LAUNCHER_SWIPELEFT;
 import static com.android.launcher3.logging.StatsLogManager.LauncherEvent.LAUNCHER_SWIPERIGHT;
@@ -126,6 +127,7 @@
 import com.android.systemui.plugins.shared.LauncherOverlayManager.LauncherOverlayCallbacks;
 
 import java.util.ArrayList;
+import java.util.Iterator;
 import java.util.List;
 import java.util.function.Consumer;
 import java.util.function.Predicate;
@@ -501,14 +503,19 @@
                 .log(LauncherEvent.LAUNCHER_ITEM_DRAG_STARTED);
     }
 
-    public void deferRemoveExtraEmptyScreen() {
-        mDeferRemoveExtraEmptyScreen = true;
+    private boolean isTwoPanelEnabled() {
+        return !FOLDABLE_SINGLE_PAGE.get() && mLauncher.mDeviceProfile.isTwoPanels;
     }
 
     @Override
     public int getPanelCount() {
-        return super.getPanelCount();
+        return isTwoPanelEnabled() ? 2 : super.getPanelCount();
     }
+
+    public void deferRemoveExtraEmptyScreen() {
+        mDeferRemoveExtraEmptyScreen = true;
+    }
+
     @Override
     public void onDragEnd() {
         if (ENFORCE_DRAG_EVENT_ORDER) {
@@ -661,7 +668,7 @@
         // created CellLayout.
         DeviceProfile dp = mLauncher.getDeviceProfile();
         CellLayout newScreen;
-        if (dp.isTwoPanels) {
+        if (FOLDABLE_SINGLE_PAGE.get() && dp.isTwoPanels) {
             newScreen = (CellLayout) LayoutInflater.from(getContext()).inflate(
                     R.layout.workspace_screen_foldable, this, false /* attachToRoot */);
         } else {
@@ -686,6 +693,15 @@
 
         if (mDragSourceInternal != null) {
             int dragSourceChildCount = mDragSourceInternal.getChildCount();
+
+            // If the icon was dragged from Hotseat, there is no page pair
+            if (isTwoPanelEnabled() && !(mDragSourceInternal.getParent() instanceof Hotseat)) {
+                int pagePairScreenId = getScreenPair(getCellPosMapper().mapModelToPresenter(
+                        dragObject.dragInfo).screenId);
+                CellLayout pagePair = mWorkspaceScreens.get(pagePairScreenId);
+                dragSourceChildCount += pagePair.getShortcutsAndWidgets().getChildCount();
+            }
+
             // When the drag view content is a LauncherAppWidgetHostView, we should increment the
             // drag source child count by 1 because the widget in drag has been detached from its
             // original parent, ShortcutAndWidgetContainer, and reattached to the DragView.
@@ -696,6 +712,11 @@
             if (dragSourceChildCount == 1) {
                 lastChildOnScreen = true;
             }
+            CellLayout cl = (CellLayout) mDragSourceInternal.getParent();
+            if (!FOLDABLE_SINGLE_PAGE.get() && getLeftmostVisiblePageForIndex(indexOfChild(cl))
+                    == getLeftmostVisiblePageForIndex(getPageCount() - 1)) {
+                childOnFinalScreen = true;
+            }
         }
 
         // If this is the last item on the final screen
@@ -730,6 +751,9 @@
      */
     private void forEachExtraEmptyPageId(Consumer<Integer> callback) {
         callback.accept(EXTRA_EMPTY_SCREEN_ID);
+        if (isTwoPanelEnabled()) {
+            callback.accept(EXTRA_EMPTY_SCREEN_SECOND_ID);
+        }
     }
 
     /**
@@ -843,7 +867,9 @@
 
     public boolean hasExtraEmptyScreens() {
         return mWorkspaceScreens.containsKey(EXTRA_EMPTY_SCREEN_ID)
-                && getChildCount() > getPanelCount();
+                && getChildCount() > getPanelCount()
+                && (!isTwoPanelEnabled()
+                || mWorkspaceScreens.containsKey(EXTRA_EMPTY_SCREEN_SECOND_ID));
     }
 
     /**
@@ -949,7 +975,14 @@
      */
     @Nullable
     public CellLayout getScreenPair(CellLayout cellLayout) {
-        return null;
+        if (!isTwoPanelEnabled()) {
+            return null;
+        }
+        int screenId = getIdForScreen(cellLayout);
+        if (screenId == -1) {
+            return null;
+        }
+        return getScreenWithId(getScreenPair(screenId));
     }
 
     public void stripEmptyScreens() {
@@ -977,6 +1010,22 @@
             }
         }
 
+        // When two panel home is enabled we only remove an empty page if both visible pages are
+        // empty.
+        if (isTwoPanelEnabled()) {
+            // We go through all the pages that were marked as removable and check their page pair
+            Iterator<Integer> removeScreensIterator = removeScreens.iterator();
+            while (removeScreensIterator.hasNext()) {
+                int pageToRemove = removeScreensIterator.next();
+                int pagePair = getScreenPair(pageToRemove);
+                if (!removeScreens.contains(pagePair)) {
+                    // The page pair isn't empty so we want to remove the current page from the
+                    // removable pages' collection
+                    removeScreensIterator.remove();
+                }
+            }
+        }
+
         // We enforce at least one page (two pages on two panel home) to add new items to.
         // In the case that we remove the last such screen(s), we convert the last screen(s)
         // to the empty screen(s)
@@ -997,7 +1046,12 @@
                 removeView(cl);
             } else {
                 // The last page(s) should be converted into extra empty page(s)
-                int extraScreenId = EXTRA_EMPTY_SCREEN_ID;
+                int extraScreenId = isTwoPanelEnabled() && id % 2 == 1
+                        // This is the right panel in a two panel scenario
+                        ? EXTRA_EMPTY_SCREEN_SECOND_ID
+                        // This is either the last screen in a one panel scenario, or the left panel
+                        // in a two panel scenario when there are only two empty pages left
+                        : EXTRA_EMPTY_SCREEN_ID;
                 mWorkspaceScreens.put(extraScreenId, cl);
                 mScreenOrder.add(extraScreenId);
             }
@@ -2518,7 +2572,8 @@
         // Go through the pages and check if the dragged item is inside one of them. This block
         // is responsible for determining whether we need to snap to a different screen.
         int nextPage = getNextPage();
-        IntSet pageIndexesToVerify = IntSet.wrap(nextPage - 1, nextPage + 1);
+        IntSet pageIndexesToVerify = IntSet.wrap(nextPage - 1,
+                nextPage + (isTwoPanelEnabled() ? 2 : 1));
 
         for (int pageIndex : pageIndexesToVerify) {
             // When deciding whether to perform a page switch, we need to consider the most
diff --git a/src/com/android/launcher3/config/FeatureFlags.java b/src/com/android/launcher3/config/FeatureFlags.java
index 39d5f9a..83431dc 100644
--- a/src/com/android/launcher3/config/FeatureFlags.java
+++ b/src/com/android/launcher3/config/FeatureFlags.java
@@ -183,6 +183,17 @@
             "Enables predictive back animation from all apps and widgets to home");
 
     // TODO(Block 11): Clean up flags
+    public static final BooleanFlag ENABLE_TWO_PANEL_HOME = getDebugFlag(270392643,
+            "ENABLE_TWO_PANEL_HOME", ENABLED,
+            "Uses two panel on home screen. Only applicable on large screen devices.");
+
+    public static final BooleanFlag FOLDABLE_WORKSPACE_REORDER = getDebugFlag(270395070,
+            "FOLDABLE_WORKSPACE_REORDER", DISABLED,
+            "In foldables, when reordering the icons and widgets, is now going to use both sides");
+
+    public static final BooleanFlag FOLDABLE_SINGLE_PAGE = getDebugFlag(270395274,
+            "FOLDABLE_SINGLE_PAGE", ENABLED, "Use a single page for the workspace");
+
     public static final BooleanFlag ENABLE_PARAMETRIZE_REORDER = getDebugFlag(289420844,
             "ENABLE_PARAMETRIZE_REORDER", DISABLED,
             "Enables generating the reorder using a set of parameters");
@@ -245,7 +256,7 @@
             "Inject fallback app corpus result when AiAi fails to return it.");
 
     public static final BooleanFlag ENABLE_LONG_PRESS_NAV_HANDLE =
-            getDebugFlag(282993230, "ENABLE_LONG_PRESS_NAV_HANDLE", DISABLED,
+            getReleaseFlag(282993230, "ENABLE_LONG_PRESS_NAV_HANDLE", TEAMFOOD,
                     "Enables long pressing on the bottom bar nav handle to trigger events.");
 
     // TODO(Block 17): Clean up flags
diff --git a/src/com/android/launcher3/responsive/HotseatSpecs.kt b/src/com/android/launcher3/responsive/HotseatSpecs.kt
new file mode 100644
index 0000000..482508d
--- /dev/null
+++ b/src/com/android/launcher3/responsive/HotseatSpecs.kt
@@ -0,0 +1,122 @@
+/*
+ * Copyright (C) 2023 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.responsive
+
+import android.content.res.TypedArray
+import android.util.Log
+import com.android.launcher3.R
+import com.android.launcher3.util.ResourceHelper
+
+class HotseatSpecs(val specs: List<HotseatSpec>) {
+
+    fun getCalculatedHeightSpec(availableHeight: Int): CalculatedHotseatSpec {
+        val spec = specs.firstOrNull { availableHeight <= it.maxAvailableSize }
+        check(spec != null) { "No available height spec found within $availableHeight." }
+        return CalculatedHotseatSpec(availableHeight, spec)
+    }
+
+    companion object {
+        private const val XML_HOTSEAT_SPEC = "hotseatSpec"
+
+        @JvmStatic
+        fun create(resourceHelper: ResourceHelper): HotseatSpecs {
+            val parser = ResponsiveSpecsParser(resourceHelper)
+            val specs = parser.parseXML(XML_HOTSEAT_SPEC, ::HotseatSpec)
+            return HotseatSpecs(specs.filter { it.specType == ResponsiveSpec.SpecType.HEIGHT })
+        }
+    }
+}
+
+data class HotseatSpec(
+    val maxAvailableSize: Int,
+    val specType: ResponsiveSpec.SpecType,
+    val hotseatQsbSpace: SizeSpec
+) {
+
+    init {
+        check(isValid()) { "Invalid HotseatSpec found." }
+    }
+
+    constructor(
+        attrs: TypedArray,
+        specs: Map<String, SizeSpec>
+    ) : this(
+        maxAvailableSize =
+            attrs.getDimensionPixelSize(R.styleable.ResponsiveSpec_maxAvailableSize, 0),
+        specType =
+            ResponsiveSpec.SpecType.values()[
+                    attrs.getInt(
+                        R.styleable.ResponsiveSpec_specType,
+                        ResponsiveSpec.SpecType.HEIGHT.ordinal
+                    )],
+        hotseatQsbSpace = specs.getOrError(SizeSpec.XmlTags.HOTSEAT_QSB_SPACE)
+    )
+
+    fun isValid(): Boolean {
+        if (maxAvailableSize <= 0) {
+            Log.e(LOG_TAG, "${this::class.simpleName}#isValid - maxAvailableSize <= 0")
+            return false
+        }
+
+        // All specs need to be individually valid
+        if (!allSpecsAreValid()) {
+            Log.e(LOG_TAG, "${this::class.simpleName}#isValid - !allSpecsAreValid()")
+            return false
+        }
+
+        return true
+    }
+
+    private fun allSpecsAreValid(): Boolean {
+        return hotseatQsbSpace.isValid() && hotseatQsbSpace.onlyFixedSize()
+    }
+
+    companion object {
+        private const val LOG_TAG = "HotseatSpec"
+    }
+}
+
+class CalculatedHotseatSpec(val availableSpace: Int, val spec: HotseatSpec) {
+
+    var hotseatQsbSpace: Int = 0
+        private set
+
+    init {
+        hotseatQsbSpace = spec.hotseatQsbSpace.getCalculatedValue(availableSpace)
+    }
+
+    override fun hashCode(): Int {
+        var result = availableSpace.hashCode()
+        result = 31 * result + hotseatQsbSpace.hashCode()
+        result = 31 * result + spec.hashCode()
+        return result
+    }
+
+    override fun equals(other: Any?): Boolean {
+        return other is CalculatedHotseatSpec &&
+            availableSpace == other.availableSpace &&
+            hotseatQsbSpace == other.hotseatQsbSpace &&
+            spec == other.spec
+    }
+
+    override fun toString(): String {
+        return "${this::class.simpleName}(" +
+            "availableSpace=$availableSpace, hotseatQsbSpace=$hotseatQsbSpace, " +
+            "${spec::class.simpleName}.maxAvailableSize=${spec.maxAvailableSize}" +
+            ")"
+    }
+}
diff --git a/src/com/android/launcher3/responsive/SizeSpec.kt b/src/com/android/launcher3/responsive/SizeSpec.kt
index d3868f0..c868c9f 100644
--- a/src/com/android/launcher3/responsive/SizeSpec.kt
+++ b/src/com/android/launcher3/responsive/SizeSpec.kt
@@ -107,11 +107,20 @@
         return true
     }
 
+    fun onlyFixedSize(): Boolean {
+        if (ofAvailableSpace > 0 || ofRemainderSpace > 0 || matchWorkspace) {
+            Log.e(TAG, "SizeSpec#onlyFixedSize - only fixed size allowed for this tag")
+            return false
+        }
+        return true
+    }
+
     object XmlTags {
         const val START_PADDING = "startPadding"
         const val END_PADDING = "endPadding"
         const val GUTTER = "gutter"
         const val CELL_SIZE = "cellSize"
+        const val HOTSEAT_QSB_SPACE = "hotseatQsbSpace"
     }
 
     companion object {
diff --git a/src/com/android/launcher3/testing/TestInformationHandler.java b/src/com/android/launcher3/testing/TestInformationHandler.java
index 438a4a0..5306932 100644
--- a/src/com/android/launcher3/testing/TestInformationHandler.java
+++ b/src/com/android/launcher3/testing/TestInformationHandler.java
@@ -17,6 +17,7 @@
 
 import static com.android.launcher3.allapps.AllAppsStore.DEFER_UPDATES_TEST;
 import static com.android.launcher3.config.FeatureFlags.ENABLE_TRACKPAD_GESTURE;
+import static com.android.launcher3.config.FeatureFlags.FOLDABLE_SINGLE_PAGE;
 import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
 
 import android.annotation.TargetApi;
@@ -156,7 +157,8 @@
                 return response;
 
             case TestProtocol.REQUEST_IS_TWO_PANELS:
-                response.putBoolean(TestProtocol.TEST_INFO_RESPONSE_FIELD, false);
+                response.putBoolean(TestProtocol.TEST_INFO_RESPONSE_FIELD,
+                        FOLDABLE_SINGLE_PAGE.get() ? false : mDeviceProfile.isTwoPanels);
                 return response;
 
             case TestProtocol.REQUEST_GET_HAD_NONTEST_EVENTS:
diff --git a/src/com/android/launcher3/views/AbstractSlideInView.java b/src/com/android/launcher3/views/AbstractSlideInView.java
index f69d299..30e0971 100644
--- a/src/com/android/launcher3/views/AbstractSlideInView.java
+++ b/src/com/android/launcher3/views/AbstractSlideInView.java
@@ -17,6 +17,7 @@
 
 import static android.view.ViewGroup.LayoutParams.MATCH_PARENT;
 
+import static com.android.app.animation.Interpolators.LINEAR;
 import static com.android.app.animation.Interpolators.scrollInterpolatorForVelocity;
 import static com.android.launcher3.LauncherAnimUtils.SCALE_PROPERTY;
 import static com.android.launcher3.LauncherAnimUtils.SUCCESS_TRANSITION_PROGRESS;
@@ -24,16 +25,14 @@
 import static com.android.launcher3.allapps.AllAppsTransitionController.REVERT_SWIPE_ALL_APPS_TO_HOME_ANIMATION_DURATION_MS;
 import static com.android.launcher3.util.ScrollableLayoutManager.PREDICTIVE_BACK_MIN_SCALE;
 
-import android.animation.AnimatorSet;
-import android.animation.ObjectAnimator;
-import android.animation.PropertyValuesHolder;
+import android.animation.ValueAnimator;
 import android.content.Context;
 import android.graphics.Canvas;
 import android.graphics.Outline;
 import android.graphics.drawable.Drawable;
 import android.os.Build;
 import android.util.AttributeSet;
-import android.util.Property;
+import android.util.FloatProperty;
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.ViewGroup;
@@ -51,6 +50,8 @@
 import com.android.launcher3.Utilities;
 import com.android.launcher3.anim.AnimatedFloat;
 import com.android.launcher3.anim.AnimatorListeners;
+import com.android.launcher3.anim.AnimatorPlaybackController;
+import com.android.launcher3.anim.PendingAnimation;
 import com.android.launcher3.touch.BaseSwipeDetector;
 import com.android.launcher3.touch.SingleAxisSwipeDetector;
 
@@ -66,8 +67,8 @@
 public abstract class AbstractSlideInView<T extends Context & ActivityContext>
         extends AbstractFloatingView implements SingleAxisSwipeDetector.Listener {
 
-    protected static final Property<AbstractSlideInView, Float> TRANSLATION_SHIFT =
-            new Property<AbstractSlideInView, Float>(Float.class, "translationShift") {
+    protected static final FloatProperty<AbstractSlideInView<?>> TRANSLATION_SHIFT =
+            new FloatProperty<>("translationShift") {
 
                 @Override
                 public Float get(AbstractSlideInView view) {
@@ -75,31 +76,54 @@
                 }
 
                 @Override
-                public void set(AbstractSlideInView view, Float value) {
+                public void setValue(AbstractSlideInView view, float value) {
                     view.setTranslationShift(value);
                 }
             };
     protected static final float TRANSLATION_SHIFT_CLOSED = 1f;
     protected static final float TRANSLATION_SHIFT_OPENED = 0f;
     private static final float VIEW_NO_SCALE = 1f;
-    private static final int NO_DURATION = -1;
+    private static final int DEFAULT_DURATION = 300;
 
     protected final T mActivityContext;
 
     protected final SingleAxisSwipeDetector mSwipeDetector;
-    protected @NonNull AnimatorSet mOpenCloseAnimator;
-    private final ObjectAnimator mTranslationShiftAnimator;
+    protected @NonNull AnimatorPlaybackController mOpenCloseAnimation;
 
     protected ViewGroup mContent;
     protected final View mColorScrim;
 
+    /**
+     * Interpolator for {@link #mOpenCloseAnimation} when we are closing due to dragging downwards.
+     */
     private Interpolator mScrollInterpolator;
     private long mScrollDuration;
+    /**
+     * End progress for {@link #mOpenCloseAnimation} when we are closing due to dragging downloads.
+     * <p>
+     * There are two cases that determine this value:
+     * <ol>
+     *     <li>
+     *         If the drag interrupts the opening transition (i.e. {@link #mToTranslationShift}
+     *         is {@link #TRANSLATION_SHIFT_OPENED}), we need to animate back to {@code 0} to
+     *         reverse the animation that was paused at {@link #onDragStart(boolean, float)}.
+     *     </li>
+     *     <li>
+     *         If the drag started after the view is fully opened (i.e.
+     *         {@link #mToTranslationShift} is {@link #TRANSLATION_SHIFT_CLOSED}), the animation
+     *         that was set up at {@link #onDragStart(boolean, float)} for closing the view
+     *         should go forward to {@code 1}.
+     *     </li>
+     * </ol>
+     */
+    private float mScrollEndProgress;
 
     // range [0, 1], 0=> completely open, 1=> completely closed
     protected float mTranslationShift = TRANSLATION_SHIFT_CLOSED;
-    /** {@link #mTranslationShift} at the invocation of {@link #onDragStart(boolean, float)}. */
-    protected float mDragStartTranslationShift;
+    protected float mFromTranslationShift;
+    protected float mToTranslationShift;
+    /** {@link #mOpenCloseAnimation} progress at {@link #onDragStart(boolean, float)}. */
+    private float mDragStartProgress;
 
     protected boolean mNoIntercept;
     protected @Nullable OnCloseListener mOnCloseBeginListener;
@@ -128,52 +152,78 @@
         mActivityContext = ActivityContext.lookupContext(context);
 
         mScrollInterpolator = Interpolators.SCROLL_CUBIC;
-        mScrollDuration = NO_DURATION;
+        mScrollDuration = DEFAULT_DURATION;
         mSwipeDetector = new SingleAxisSwipeDetector(context, this,
                 SingleAxisSwipeDetector.VERTICAL);
 
-        mOpenCloseAnimator = new AnimatorSet();
-        mTranslationShiftAnimator = ObjectAnimator.ofPropertyValuesHolder(this);
+        mOpenCloseAnimation = new PendingAnimation(0).createPlaybackController();
 
         int scrimColor = getScrimColor(context);
         mColorScrim = scrimColor != -1 ? createColorScrim(context, scrimColor) : null;
     }
 
     /**
-     * Sets up a {@link #mOpenCloseAnimator} for opening with default parameters.
+     * Sets up a {@link #mOpenCloseAnimation} for opening with default parameters.
      *
-     * @see #setUpOpenCloseAnimator(float, Interpolator)
+     * @see #setUpOpenCloseAnimation(float, float, long)
      */
-    protected final AnimatorSet setUpDefaultOpenAnimator() {
-        return setUpOpenCloseAnimator(TRANSLATION_SHIFT_OPENED, Interpolators.FAST_OUT_SLOW_IN);
+    protected final AnimatorPlaybackController setUpDefaultOpenAnimation() {
+        AnimatorPlaybackController animation = setUpOpenCloseAnimation(
+                TRANSLATION_SHIFT_CLOSED, TRANSLATION_SHIFT_OPENED, DEFAULT_DURATION);
+        animation.getAnimationPlayer().setInterpolator(Interpolators.FAST_OUT_SLOW_IN);
+        return animation;
     }
 
     /**
-     * Initializes a new {@link #mOpenCloseAnimator}.
-     * <p>
-     * Subclasses should override this method if they want to add more {@code Animator} instances
-     * to the set.
+     * Sets up a {@link #mOpenCloseAnimation} for opening with a given duration.
      *
-     * @param translationShift             translation shift to animate to.
-     * @param translationShiftInterpolator interpolator for {@link #mTranslationShiftAnimator}.
-     * @return {@link #mOpenCloseAnimator}
+     * @see #setUpOpenCloseAnimation(float, float, long)
      */
-    protected AnimatorSet setUpOpenCloseAnimator(
-            float translationShift, Interpolator translationShiftInterpolator) {
-        mOpenCloseAnimator = new AnimatorSet();
-        mOpenCloseAnimator.addListener(AnimatorListeners.forEndCallback(() -> {
+    protected final AnimatorPlaybackController setUpOpenAnimation(long duration) {
+        return setUpOpenCloseAnimation(
+                TRANSLATION_SHIFT_CLOSED, TRANSLATION_SHIFT_OPENED, duration);
+    }
+
+    private AnimatorPlaybackController setUpCloseAnimation(long duration) {
+        return setUpOpenCloseAnimation(
+                TRANSLATION_SHIFT_OPENED, TRANSLATION_SHIFT_CLOSED, duration);
+    }
+
+    /**
+     * Initializes a new {@link #mOpenCloseAnimation}.
+     *
+     * @param fromTranslationShift translation shift to animate from.
+     * @param toTranslationShift   translation shift to animate to.
+     * @param duration             animation duration.
+     * @return {@link #mOpenCloseAnimation}
+     */
+    private AnimatorPlaybackController setUpOpenCloseAnimation(
+            float fromTranslationShift, float toTranslationShift, long duration) {
+        mFromTranslationShift = fromTranslationShift;
+        mToTranslationShift = toTranslationShift;
+
+        PendingAnimation animation = new PendingAnimation(duration);
+        animation.addEndListener(b -> {
             mSwipeDetector.finishedScrolling();
             announceAccessibilityChanges();
-        }));
+        });
 
-        mTranslationShiftAnimator.setValues(PropertyValuesHolder.ofFloat(
-                TRANSLATION_SHIFT, translationShift));
-        mTranslationShiftAnimator.setInterpolator(translationShiftInterpolator);
-        mOpenCloseAnimator.play(mTranslationShiftAnimator);
+        animation.addFloat(
+                this, TRANSLATION_SHIFT, fromTranslationShift, toTranslationShift, LINEAR);
+        onOpenCloseAnimationPending(animation);
 
-        return mOpenCloseAnimator;
+        mOpenCloseAnimation = animation.createPlaybackController();
+        return mOpenCloseAnimation;
     }
 
+    /**
+     * Invoked when a {@link #mOpenCloseAnimation} is being set up.
+     * <p>
+     * Subclasses can override this method to modify the animation before it's used to create a
+     * {@link AnimatorPlaybackController}.
+     */
+    protected void onOpenCloseAnimationPending(PendingAnimation animation) {}
+
     protected void attachToContainer() {
         if (mColorScrim != null) {
             getPopupContainer().addView(mColorScrim);
@@ -316,29 +366,33 @@
     }
 
     private boolean isOpeningAnimationRunning() {
-        return mIsOpen && mOpenCloseAnimator.isRunning();
+        return mIsOpen && mOpenCloseAnimation.getAnimationPlayer().isRunning();
     }
 
     /* SingleAxisSwipeDetector.Listener */
 
     @Override
     public void onDragStart(boolean start, float startDisplacement) {
-        mOpenCloseAnimator.cancel();
-        mDragStartTranslationShift = mTranslationShift;
+        if (mOpenCloseAnimation.getAnimationPlayer().isRunning()) {
+            mOpenCloseAnimation.pause();
+            mDragStartProgress = mOpenCloseAnimation.getProgressFraction();
+        } else {
+            setUpCloseAnimation(DEFAULT_DURATION);
+            mDragStartProgress = 0;
+        }
     }
 
     @Override
     public boolean onDrag(float displacement) {
-        setTranslationShift(Utilities.boundToRange(
-                mDragStartTranslationShift + displacement / getShiftRange(),
-                TRANSLATION_SHIFT_OPENED,
-                TRANSLATION_SHIFT_CLOSED));
+        float progress = mDragStartProgress
+                + Math.signum(mToTranslationShift - mFromTranslationShift)
+                * (displacement / getShiftRange());
+        mOpenCloseAnimation.setPlayFraction(Utilities.boundToRange(progress, 0, 1));
         return true;
     }
 
     @Override
     public void onDragEnd(float velocity) {
-        mDragStartTranslationShift = 0;
         float successfulShiftThreshold = mActivityContext.getDeviceProfile().isTablet
                 ? TABLET_BOTTOM_SHEET_SUCCESS_TRANSITION_PROGRESS : SUCCESS_TRANSITION_PROGRESS;
         if ((mSwipeDetector.isFling(velocity) && velocity > 0)
@@ -346,10 +400,15 @@
             mScrollInterpolator = scrollInterpolatorForVelocity(velocity);
             mScrollDuration = BaseSwipeDetector.calculateDuration(
                     velocity, TRANSLATION_SHIFT_CLOSED - mTranslationShift);
+            mScrollEndProgress = mToTranslationShift == TRANSLATION_SHIFT_OPENED ? 0 : 1;
             close(true);
         } else {
-            setUpOpenCloseAnimator(TRANSLATION_SHIFT_OPENED, Interpolators.DECELERATE)
-                    .setDuration(BaseSwipeDetector.calculateDuration(velocity, mTranslationShift))
+            ValueAnimator animator = mOpenCloseAnimation.getAnimationPlayer();
+            animator.setInterpolator(Interpolators.DECELERATE);
+            animator.setFloatValues(
+                    mOpenCloseAnimation.getProgressFraction(),
+                    mToTranslationShift == TRANSLATION_SHIFT_OPENED ? 1 : 0);
+            animator.setDuration(BaseSwipeDetector.calculateDuration(velocity, mTranslationShift))
                     .start();
         }
     }
@@ -371,24 +430,27 @@
         Optional.ofNullable(mOnCloseBeginListener).ifPresent(OnCloseListener::onSlideInViewClosed);
 
         if (!animate) {
-            mOpenCloseAnimator.cancel();
+            mOpenCloseAnimation.pause();
             setTranslationShift(TRANSLATION_SHIFT_CLOSED);
             onCloseComplete();
             return;
         }
 
-        final Interpolator interpolator;
-        final long duration;
+        final ValueAnimator animator;
         if (mSwipeDetector.isIdleState()) {
-            interpolator = getIdleInterpolator();
-            duration = defaultDuration;
+            setUpCloseAnimation(defaultDuration);
+            animator = mOpenCloseAnimation.getAnimationPlayer();
+            animator.setInterpolator(getIdleInterpolator());
         } else {
-            interpolator = mScrollInterpolator;
-            duration = mScrollDuration > NO_DURATION ? mScrollDuration : defaultDuration;
+            animator = mOpenCloseAnimation.getAnimationPlayer();
+            animator.setInterpolator(mScrollInterpolator);
+            animator.setDuration(mScrollDuration);
+            mOpenCloseAnimation.getAnimationPlayer().setFloatValues(
+                    mOpenCloseAnimation.getProgressFraction(), mScrollEndProgress);
         }
-        setUpOpenCloseAnimator(TRANSLATION_SHIFT_CLOSED, interpolator)
-                .addListener(AnimatorListeners.forEndCallback(this::onCloseComplete));
-        mOpenCloseAnimator.setDuration(duration).start();
+
+        animator.addListener(AnimatorListeners.forEndCallback(this::onCloseComplete));
+        animator.start();
     }
 
     protected Interpolator getIdleInterpolator() {
diff --git a/src/com/android/launcher3/views/WidgetsEduView.java b/src/com/android/launcher3/views/WidgetsEduView.java
index 92e048b..e70b1cb 100644
--- a/src/com/android/launcher3/views/WidgetsEduView.java
+++ b/src/com/android/launcher3/views/WidgetsEduView.java
@@ -116,11 +116,11 @@
     }
 
     private void animateOpen() {
-        if (mIsOpen || mOpenCloseAnimator.isRunning()) {
+        if (mIsOpen || mOpenCloseAnimation.getAnimationPlayer().isRunning()) {
             return;
         }
         mIsOpen = true;
-        setUpDefaultOpenAnimator().start();
+        setUpDefaultOpenAnimation().start();
     }
 
     /** Shows widget education dialog. */
diff --git a/src/com/android/launcher3/widget/AddItemWidgetsBottomSheet.java b/src/com/android/launcher3/widget/AddItemWidgetsBottomSheet.java
index c6fc5fe..80b1cdd 100644
--- a/src/com/android/launcher3/widget/AddItemWidgetsBottomSheet.java
+++ b/src/com/android/launcher3/widget/AddItemWidgetsBottomSheet.java
@@ -128,11 +128,11 @@
     }
 
     private void animateOpen() {
-        if (mIsOpen || mOpenCloseAnimator.isRunning()) {
+        if (mIsOpen || mOpenCloseAnimation.getAnimationPlayer().isRunning()) {
             return;
         }
         mIsOpen = true;
-        setUpDefaultOpenAnimator().start();
+        setUpDefaultOpenAnimation().start();
     }
 
     @Override
diff --git a/src/com/android/launcher3/widget/WidgetsBottomSheet.java b/src/com/android/launcher3/widget/WidgetsBottomSheet.java
index 82394f1..c347939 100644
--- a/src/com/android/launcher3/widget/WidgetsBottomSheet.java
+++ b/src/com/android/launcher3/widget/WidgetsBottomSheet.java
@@ -224,12 +224,12 @@
     }
 
     private void animateOpen() {
-        if (mIsOpen || mOpenCloseAnimator.isRunning()) {
+        if (mIsOpen || mOpenCloseAnimation.getAnimationPlayer().isRunning()) {
             return;
         }
         mIsOpen = true;
         setupNavBarColor();
-        setUpDefaultOpenAnimator().start();
+        setUpDefaultOpenAnimation().start();
     }
 
     @Override
diff --git a/src/com/android/launcher3/widget/picker/WidgetsFullSheet.java b/src/com/android/launcher3/widget/picker/WidgetsFullSheet.java
index 43f1846..abca1f8 100644
--- a/src/com/android/launcher3/widget/picker/WidgetsFullSheet.java
+++ b/src/com/android/launcher3/widget/picker/WidgetsFullSheet.java
@@ -22,6 +22,7 @@
 import static com.android.launcher3.logging.StatsLogManager.LauncherEvent.LAUNCHER_WIDGETSTRAY_SEARCHED;
 import static com.android.launcher3.testing.shared.TestProtocol.NORMAL_STATE_ORDINAL;
 
+import android.animation.Animator;
 import android.content.Context;
 import android.content.pm.LauncherApps;
 import android.content.res.Configuration;
@@ -624,13 +625,12 @@
                 mContent.setAlpha(0);
                 setTranslationShift(VERTICAL_START_POSITION);
             }
-            setUpOpenCloseAnimator(
-                    TRANSLATION_SHIFT_OPENED,
-                    AnimationUtils.loadInterpolator(
-                            getContext(), android.R.interpolator.linear_out_slow_in));
+            setUpOpenAnimation(mActivityContext.getDeviceProfile().bottomSheetOpenDuration);
+            Animator animator = mOpenCloseAnimation.getAnimationPlayer();
+            animator.setInterpolator(AnimationUtils.loadInterpolator(
+                    getContext(), android.R.interpolator.linear_out_slow_in));
             post(() -> {
-                mOpenCloseAnimator
-                        .setDuration(mActivityContext.getDeviceProfile().bottomSheetOpenDuration)
+                animator.setDuration(mActivityContext.getDeviceProfile().bottomSheetOpenDuration)
                         .start();
                 mContent.animate().alpha(1).setDuration(FADE_IN_DURATION);
             });
diff --git a/tests/res/xml/invalid_hotseat_file_case_1.xml b/tests/res/xml/invalid_hotseat_file_case_1.xml
new file mode 100644
index 0000000..fcbc5ea
--- /dev/null
+++ b/tests/res/xml/invalid_hotseat_file_case_1.xml
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+  ~ Copyright (C) 2023 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.
+  -->
+<hotseatSpecs xmlns:launcher="http://schemas.android.com/apk/res-auto">
+
+    <hotseatSpec
+        launcher:specType="height"
+        launcher:maxAvailableSize="847dp">
+        <hotseatQsbSpace launcher:ofAvailableSpace="1" />
+    </hotseatSpec>
+
+    <hotseatSpec
+        launcher:specType="height"
+        launcher:maxAvailableSize="9999dp">
+        <hotseatQsbSpace launcher:fixedSize="36dp" />
+    </hotseatSpec>
+
+</hotseatSpecs>
\ No newline at end of file
diff --git a/tests/res/xml/valid_hotseat_file.xml b/tests/res/xml/valid_hotseat_file.xml
new file mode 100644
index 0000000..c7f52e8
--- /dev/null
+++ b/tests/res/xml/valid_hotseat_file.xml
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+  ~ Copyright (C) 2023 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.
+  -->
+<hotseatSpecs xmlns:launcher="http://schemas.android.com/apk/res-auto">
+
+    <hotseatSpec
+        launcher:specType="height"
+        launcher:maxAvailableSize="847dp">
+        <hotseatQsbSpace launcher:fixedSize="24dp" />
+    </hotseatSpec>
+
+    <hotseatSpec
+        launcher:specType="height"
+        launcher:maxAvailableSize="9999dp">
+        <hotseatQsbSpace launcher:fixedSize="36dp" />
+    </hotseatSpec>
+
+</hotseatSpecs>
\ No newline at end of file
diff --git a/tests/src/com/android/launcher3/AbstractDeviceProfileTest.kt b/tests/src/com/android/launcher3/AbstractDeviceProfileTest.kt
index f0cedd3..dd79ca8 100644
--- a/tests/src/com/android/launcher3/AbstractDeviceProfileTest.kt
+++ b/tests/src/com/android/launcher3/AbstractDeviceProfileTest.kt
@@ -22,6 +22,7 @@
 import android.util.DisplayMetrics
 import android.view.Surface
 import androidx.test.core.app.ApplicationProvider
+import com.android.launcher3.testing.shared.ResourceUtils
 import com.android.launcher3.util.DisplayController
 import com.android.launcher3.util.NavigationMode
 import com.android.launcher3.util.WindowBounds
@@ -158,41 +159,55 @@
     }
 
     protected fun initializeVarsForTwoPanel(
-        deviceTabletSpec: DeviceSpec,
-        deviceSpec: DeviceSpec,
+        deviceSpecUnfolded: DeviceSpec,
+        deviceSpecFolded: DeviceSpec,
         isLandscape: Boolean = false,
-        isGestureMode: Boolean = true
+        isGestureMode: Boolean = true,
+        isFolded: Boolean = false
     ) {
-        val (tabletNaturalX, tabletNaturalY) = deviceTabletSpec.naturalSize
-        val tabletWindowsBounds =
-            tabletWindowsBounds(deviceTabletSpec, tabletNaturalX, tabletNaturalY)
-        val tabletDisplayInfo =
+        val (unfoldedNaturalX, unfoldedNaturalY) = deviceSpecUnfolded.naturalSize
+        val unfoldedWindowsBounds =
+            tabletWindowsBounds(deviceSpecUnfolded, unfoldedNaturalX, unfoldedNaturalY)
+        val unfoldedDisplayInfo =
             CachedDisplayInfo(
-                Point(tabletNaturalX, tabletNaturalY),
+                Point(unfoldedNaturalX, unfoldedNaturalY),
                 Surface.ROTATION_0,
                 Rect(0, 0, 0, 0)
             )
 
-        val (phoneNaturalX, phoneNaturalY) = deviceSpec.naturalSize
-        val phoneWindowsBounds =
-            phoneWindowsBounds(deviceSpec, isGestureMode, phoneNaturalX, phoneNaturalY)
-        val phoneDisplayInfo =
+        val (foldedNaturalX, foldedNaturalY) = deviceSpecFolded.naturalSize
+        val foldedWindowsBounds =
+            phoneWindowsBounds(deviceSpecFolded, isGestureMode, foldedNaturalX, foldedNaturalY)
+        val foldedDisplayInfo =
             CachedDisplayInfo(
-                Point(phoneNaturalX, phoneNaturalY),
+                Point(foldedNaturalX, foldedNaturalY),
                 Surface.ROTATION_0,
                 Rect(0, 0, 0, 0)
             )
 
         val perDisplayBoundsCache =
-            mapOf(tabletDisplayInfo to tabletWindowsBounds, phoneDisplayInfo to phoneWindowsBounds)
+            mapOf(
+                unfoldedDisplayInfo to unfoldedWindowsBounds,
+                foldedDisplayInfo to foldedWindowsBounds
+            )
 
-        initializeCommonVars(
-            perDisplayBoundsCache,
-            tabletDisplayInfo,
-            rotation = if (isLandscape) Surface.ROTATION_0 else Surface.ROTATION_90,
-            isGestureMode,
-            densityDpi = deviceTabletSpec.densityDpi
-        )
+        if (isFolded) {
+            initializeCommonVars(
+                perDisplayBoundsCache = perDisplayBoundsCache,
+                displayInfo = foldedDisplayInfo,
+                rotation = if (isLandscape) Surface.ROTATION_90 else Surface.ROTATION_0,
+                isGestureMode = isGestureMode,
+                densityDpi = deviceSpecFolded.densityDpi
+            )
+        } else {
+            initializeCommonVars(
+                perDisplayBoundsCache = perDisplayBoundsCache,
+                displayInfo = unfoldedDisplayInfo,
+                rotation = if (isLandscape) Surface.ROTATION_0 else Surface.ROTATION_90,
+                isGestureMode = isGestureMode,
+                densityDpi = deviceSpecUnfolded.densityDpi
+            )
+        }
     }
 
     private fun phoneWindowsBounds(
@@ -306,4 +321,12 @@
     private fun writeToDevice(context: Context, fileName: String, content: String) {
         File(context.getDir("dumpTests", Context.MODE_PRIVATE), fileName).writeText(content)
     }
+
+    protected fun Float.dpToPx(): Float {
+        return ResourceUtils.pxFromDp(this, context!!.resources.displayMetrics).toFloat()
+    }
+
+    protected fun Int.dpToPx(): Int {
+        return ResourceUtils.pxFromDp(this.toFloat(), context!!.resources.displayMetrics)
+    }
 }
diff --git a/tests/src/com/android/launcher3/responsive/CalculatedFolderSpecsTest.kt b/tests/src/com/android/launcher3/responsive/CalculatedFolderSpecsTest.kt
index 863cf76..f2a269a 100644
--- a/tests/src/com/android/launcher3/responsive/CalculatedFolderSpecsTest.kt
+++ b/tests/src/com/android/launcher3/responsive/CalculatedFolderSpecsTest.kt
@@ -21,7 +21,6 @@
 import androidx.test.filters.SmallTest
 import androidx.test.platform.app.InstrumentationRegistry
 import com.android.launcher3.AbstractDeviceProfileTest
-import com.android.launcher3.testing.shared.ResourceUtils
 import com.android.launcher3.tests.R
 import com.android.launcher3.util.TestResourceHelper
 import com.google.common.truth.Truth.assertThat
@@ -118,8 +117,4 @@
             assertThat(cellSizePx).isEqualTo(calculatedWorkspace.cellSizePx)
         }
     }
-
-    private fun Int.dpToPx(): Int {
-        return ResourceUtils.pxFromDp(this.toFloat(), context!!.resources.displayMetrics)
-    }
 }
diff --git a/tests/src/com/android/launcher3/responsive/CalculatedHotseatSpecTest.kt b/tests/src/com/android/launcher3/responsive/CalculatedHotseatSpecTest.kt
new file mode 100644
index 0000000..0ecf7ba
--- /dev/null
+++ b/tests/src/com/android/launcher3/responsive/CalculatedHotseatSpecTest.kt
@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2023 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.responsive
+
+import android.content.Context
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.filters.SmallTest
+import androidx.test.platform.app.InstrumentationRegistry
+import com.android.launcher3.AbstractDeviceProfileTest
+import com.android.launcher3.tests.R as TestR
+import com.android.launcher3.util.TestResourceHelper
+import com.google.common.truth.Truth.assertThat
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@SmallTest
+@RunWith(AndroidJUnit4::class)
+class CalculatedHotseatSpecTest : AbstractDeviceProfileTest() {
+    override val runningContext: Context = InstrumentationRegistry.getInstrumentation().context
+
+    /**
+     * This test tests:
+     * - (height spec) gets the correct breakpoint from the XML - skips the first breakpoint
+     */
+    @Test
+    fun normalPhone_returnsSecondBreakpointSpec() {
+        val deviceSpec = deviceSpecs["phone"]!!
+        initializeVarsForPhone(deviceSpec)
+
+        // Hotseat uses the whole device height
+        val availableHeight = deviceSpec.naturalSize.second
+
+        val hotseatSpecs =
+            HotseatSpecs.create(TestResourceHelper(context!!, TestR.xml.valid_hotseat_file))
+        val heightSpec = hotseatSpecs.getCalculatedHeightSpec(availableHeight)
+
+        assertThat(heightSpec.availableSpace).isEqualTo(availableHeight)
+        assertThat(heightSpec.hotseatQsbSpace).isEqualTo(95)
+    }
+
+    /**
+     * This test tests:
+     * - (height spec) gets the correct breakpoint from the XML - use the first breakpoint
+     */
+    @Test
+    fun smallPhone_returnsFirstBreakpointSpec() {
+        val deviceSpec = deviceSpecs["phone"]!!
+        deviceSpec.densityDpi = 540 // larger display size
+        initializeVarsForPhone(deviceSpec)
+
+        // Hotseat uses the whole device height
+        val availableHeight = deviceSpec.naturalSize.second
+
+        val hotseatSpecs =
+            HotseatSpecs.create(TestResourceHelper(context!!, TestR.xml.valid_hotseat_file))
+        val heightSpec = hotseatSpecs.getCalculatedHeightSpec(availableHeight)
+
+        assertThat(heightSpec.availableSpace).isEqualTo(availableHeight)
+        assertThat(heightSpec.hotseatQsbSpace).isEqualTo(81)
+    }
+}
diff --git a/tests/src/com/android/launcher3/responsive/FolderSpecsTest.kt b/tests/src/com/android/launcher3/responsive/FolderSpecsTest.kt
index e21af57..4b05949 100644
--- a/tests/src/com/android/launcher3/responsive/FolderSpecsTest.kt
+++ b/tests/src/com/android/launcher3/responsive/FolderSpecsTest.kt
@@ -22,7 +22,6 @@
 import androidx.test.platform.app.InstrumentationRegistry
 import com.android.launcher3.AbstractDeviceProfileTest
 import com.android.launcher3.responsive.ResponsiveSpec.SpecType
-import com.android.launcher3.testing.shared.ResourceUtils
 import com.android.launcher3.tests.R
 import com.android.launcher3.util.TestResourceHelper
 import com.google.common.truth.Truth.assertThat
@@ -249,12 +248,4 @@
         val folderSpecs = FolderSpecs.create(resourceHelper)
         folderSpecs.getCalculatedHeightSpec(cells, availableSpace, calculatedWorkspaceSpec)
     }
-
-    private fun Float.dpToPx(): Float {
-        return ResourceUtils.pxFromDp(this, context!!.resources.displayMetrics).toFloat()
-    }
-
-    private fun Int.dpToPx(): Int {
-        return ResourceUtils.pxFromDp(this.toFloat(), context!!.resources.displayMetrics)
-    }
 }
diff --git a/tests/src/com/android/launcher3/responsive/HotseatSpecsTest.kt b/tests/src/com/android/launcher3/responsive/HotseatSpecsTest.kt
new file mode 100644
index 0000000..c764e47
--- /dev/null
+++ b/tests/src/com/android/launcher3/responsive/HotseatSpecsTest.kt
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2023 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.responsive
+
+import android.content.Context
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.filters.SmallTest
+import androidx.test.platform.app.InstrumentationRegistry
+import com.android.launcher3.AbstractDeviceProfileTest
+import com.android.launcher3.tests.R as TestR
+import com.android.launcher3.util.TestResourceHelper
+import com.android.systemui.util.dpToPx
+import com.google.common.truth.Truth.assertThat
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@SmallTest
+@RunWith(AndroidJUnit4::class)
+class HotseatSpecsTest : AbstractDeviceProfileTest() {
+    override val runningContext: Context = InstrumentationRegistry.getInstrumentation().context
+
+    @Before
+    fun setup() {
+        initializeVarsForPhone(deviceSpecs["phone"]!!)
+    }
+
+    @Test
+    fun parseValidFile() {
+        val hotseatSpecs =
+            HotseatSpecs.create(TestResourceHelper(context!!, TestR.xml.valid_hotseat_file))
+        assertThat(hotseatSpecs.specs.size).isEqualTo(2)
+
+        val expectedSpecs =
+            listOf(
+                HotseatSpec(
+                    maxAvailableSize = 847.dpToPx(),
+                    specType = ResponsiveSpec.SpecType.HEIGHT,
+                    hotseatQsbSpace = SizeSpec(24f.dpToPx())
+                ),
+                HotseatSpec(
+                    maxAvailableSize = 9999.dpToPx(),
+                    specType = ResponsiveSpec.SpecType.HEIGHT,
+                    hotseatQsbSpace = SizeSpec(36f.dpToPx())
+                ),
+            )
+
+        assertThat(hotseatSpecs.specs.size).isEqualTo(expectedSpecs.size)
+        assertThat(hotseatSpecs.specs[0]).isEqualTo(expectedSpecs[0])
+        assertThat(hotseatSpecs.specs[1]).isEqualTo(expectedSpecs[1])
+    }
+
+    @Test(expected = IllegalStateException::class)
+    fun parseInvalidFile_spaceIsNotFixedSize_throwsError() {
+        HotseatSpecs.create(TestResourceHelper(context!!, TestR.xml.invalid_hotseat_file_case_1))
+    }
+}
diff --git a/tests/src/com/android/launcher3/responsive/SizeSpecTest.kt b/tests/src/com/android/launcher3/responsive/SizeSpecTest.kt
index 088cae1..8ca07c6 100644
--- a/tests/src/com/android/launcher3/responsive/SizeSpecTest.kt
+++ b/tests/src/com/android/launcher3/responsive/SizeSpecTest.kt
@@ -139,4 +139,20 @@
             assertThat(instance.isValid()).isEqualTo(false)
         }
     }
+
+    @Test
+    fun onlyFixedSize() {
+        assertThat(SizeSpec(fixedSize = 16f).onlyFixedSize()).isEqualTo(true)
+
+        val combinations =
+            listOf(
+                SizeSpec(0f, 1.1f, 0f, false),
+                SizeSpec(0f, 0f, 1.1f, false),
+                SizeSpec(0f, 0f, 0f, true)
+            )
+
+        for (instance in combinations) {
+            assertThat(instance.onlyFixedSize()).isEqualTo(false)
+        }
+    }
 }