diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 2b433f1..3597778 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -26,7 +26,6 @@
 import static com.android.launcher3.AbstractFloatingView.TYPE_FOLDER;
 import static com.android.launcher3.AbstractFloatingView.TYPE_ICON_SURFACE;
 import static com.android.launcher3.AbstractFloatingView.TYPE_REBIND_SAFE;
-import static com.android.launcher3.AbstractFloatingView.TYPE_SNACKBAR;
 import static com.android.launcher3.AbstractFloatingView.getTopOpenViewWithType;
 import static com.android.launcher3.LauncherAnimUtils.HOTSEAT_SCALE_PROPERTY_FACTORY;
 import static com.android.launcher3.LauncherAnimUtils.SCALE_INDEX_WIDGET_TRANSITION;
@@ -182,7 +181,6 @@
 import com.android.launcher3.pageindicators.WorkspacePageIndicator;
 import com.android.launcher3.pm.PinRequestHelper;
 import com.android.launcher3.popup.ArrowPopup;
-import com.android.launcher3.popup.PopupContainerWithArrow;
 import com.android.launcher3.popup.PopupDataProvider;
 import com.android.launcher3.popup.SystemShortcut;
 import com.android.launcher3.qsb.QsbContainerView;
@@ -207,7 +205,6 @@
 import com.android.launcher3.util.OnboardingPrefs;
 import com.android.launcher3.util.PackageUserKey;
 import com.android.launcher3.util.PendingRequestArgs;
-import com.android.launcher3.util.Preconditions;
 import com.android.launcher3.util.RunnableList;
 import com.android.launcher3.util.ScreenOnTracker;
 import com.android.launcher3.util.ScreenOnTracker.ScreenOnListener;
@@ -321,7 +318,7 @@
     @Thunk @VisibleForTesting public static final int NEW_APPS_ANIMATION_DELAY = 500;
 
     private static final String DISPLAY_WORKSPACE_TRACE_METHOD_NAME = "DisplayWorkspaceFirstFrame";
-    private static final String DISPLAY_ALL_APPS_TRACE_METHOD_NAME = "DisplayAllApps";
+    public static final String DISPLAY_ALL_APPS_TRACE_METHOD_NAME = "DisplayAllApps";
     public static final int DISPLAY_WORKSPACE_TRACE_COOKIE = 0;
     public static final int DISPLAY_ALL_APPS_TRACE_COOKIE = 1;
 
@@ -333,7 +330,11 @@
     private static final boolean DESKTOP_MODE_SUPPORTED =
             "1".equals(Utilities.getSystemProperty("persist.wm.debug.desktop_mode_2", "0"));
 
-    KeyboardShortcutsDelegate mKeyboardShortcutsDelegate = new KeyboardShortcutsDelegate(this);
+    private final ModelCallbacks mModelCallbacks = createModelCallbacks();
+
+    private final KeyboardShortcutsDelegate mKeyboardShortcutsDelegate =
+            new KeyboardShortcutsDelegate(this);
+
     @Thunk
     Workspace<?> mWorkspace;
     @Thunk
@@ -593,6 +594,10 @@
         mStartupLatencyLogger.logEnd(LAUNCHER_LATENCY_STARTUP_ACTIVITY_ON_CREATE);
     }
 
+    protected ModelCallbacks createModelCallbacks() {
+        return new ModelCallbacks(this);
+    }
+
     /**
      * Create {@link StartupLatencyLogger} that only collects launcher startup latency metrics
      * without sending them anywhere. Child class can override this method to create logger
@@ -2239,13 +2244,7 @@
 
     @Override
     public void preAddApps() {
-        // If there's an undo snackbar, force it to complete to ensure empty screens are removed
-        // before trying to add new items.
-        mModelWriter.commitDelete();
-        AbstractFloatingView snackbar = AbstractFloatingView.getOpenView(this, TYPE_SNACKBAR);
-        if (snackbar != null) {
-            snackbar.post(() -> snackbar.close(true));
-        }
+        mModelCallbacks.preAddApps();
     }
 
     @Override
@@ -2843,90 +2842,70 @@
     public void onPageEndTransition() {}
 
     /**
-     * Add the icons for all apps.
-     *
-     * Implementation of the method from LauncherModel.Callbacks.
+     * See {@code LauncherBindingDelegate}
      */
     @Override
     @TargetApi(Build.VERSION_CODES.S)
     @UiThread
     public void bindAllApplications(AppInfo[] apps, int flags,
             Map<PackageUserKey, Integer> packageUserKeytoUidMap) {
-        Preconditions.assertUIThread();
-        boolean hadWorkApps = mAppsView.shouldShowTabs();
-        AllAppsStore<Launcher> appsStore = mAppsView.getAppsStore();
-        appsStore.setApps(apps, flags, packageUserKeytoUidMap);
-        PopupContainerWithArrow.dismissInvalidPopup(this);
-        if (hadWorkApps != mAppsView.shouldShowTabs()) {
-            getStateManager().goToState(NORMAL);
-        }
-
+        mModelCallbacks.bindAllApplications(apps, flags, packageUserKeytoUidMap);
         if (Utilities.ATLEAST_S) {
-            Trace.endAsyncSection(DISPLAY_ALL_APPS_TRACE_METHOD_NAME,
-                    DISPLAY_ALL_APPS_TRACE_COOKIE);
+            Trace.endAsyncSection(
+                    Launcher.DISPLAY_ALL_APPS_TRACE_METHOD_NAME,
+                    Launcher.DISPLAY_ALL_APPS_TRACE_COOKIE
+            );
         }
     }
 
     /**
-     * Copies LauncherModel's map of activities to shortcut counts to Launcher's. This is necessary
-     * because LauncherModel's map is updated in the background, while Launcher runs on the UI.
+     * See {@code LauncherBindingDelegate}
      */
     @Override
     public void bindDeepShortcutMap(HashMap<ComponentKey, Integer> deepShortcutMapCopy) {
-        mPopupDataProvider.setDeepShortcutMap(deepShortcutMapCopy);
+        mModelCallbacks.bindDeepShortcutMap(deepShortcutMapCopy);
     }
 
     @Override
     public void bindIncrementalDownloadProgressUpdated(AppInfo app) {
-        mAppsView.getAppsStore().updateProgressBar(app);
+        mModelCallbacks.bindIncrementalDownloadProgressUpdated(app);
     }
 
     @Override
     public void bindWidgetsRestored(ArrayList<LauncherAppWidgetInfo> widgets) {
-        mWorkspace.widgetsRestored(widgets);
+        mModelCallbacks.bindWidgetsRestored(widgets);
     }
 
     /**
-     * Some shortcuts were updated in the background.
-     * Implementation of the method from LauncherModel.Callbacks.
-     *
-     * @param updated list of shortcuts which have changed.
+     * See {@code LauncherBindingDelegate}
      */
     @Override
     public void bindWorkspaceItemsChanged(List<WorkspaceItemInfo> updated) {
-        if (!updated.isEmpty()) {
-            mWorkspace.updateWorkspaceItems(updated, this);
-            PopupContainerWithArrow.dismissInvalidPopup(this);
-        }
+        mModelCallbacks.bindWorkspaceItemsChanged(updated);
     }
 
     /**
-     * Update the state of a package, typically related to install state.
-     *
-     * Implementation of the method from LauncherModel.Callbacks.
+     * See {@code LauncherBindingDelegate}
      */
     @Override
     public void bindRestoreItemsChange(HashSet<ItemInfo> updates) {
-        mWorkspace.updateRestoreItems(updates, this);
+        mModelCallbacks.bindRestoreItemsChange(updates);
     }
 
     /**
-     * A package was uninstalled/updated.  We take both the super set of packageNames
-     * in addition to specific applications to remove, the reason being that
-     * this can be called when a package is updated as well.  In that scenario,
-     * we only remove specific components from the workspace and hotseat, where as
-     * package-removal should clear all items by package name.
+     * See {@code LauncherBindingDelegate}
      */
     @Override
     public void bindWorkspaceComponentsRemoved(Predicate<ItemInfo> matcher) {
-        mWorkspace.removeItemsByMatcher(matcher);
-        mDragController.onAppsRemoved(matcher);
-        PopupContainerWithArrow.dismissInvalidPopup(this);
+        mModelCallbacks.bindWorkspaceComponentsRemoved(matcher);
     }
 
+    /**
+     * See {@code LauncherBindingDelegate}
+     */
     @Override
     public void bindAllWidgets(final List<WidgetsListBaseEntry> allWidgets) {
-        mPopupDataProvider.setAllWidgets(allWidgets);
+        mModelCallbacks.bindAllWidgets(allWidgets);
     }
 
     @Override
@@ -3443,4 +3422,4 @@
     }
 
     // End of Getters and Setters
-}
+}
\ No newline at end of file
diff --git a/src/com/android/launcher3/ModelCallbacks.kt b/src/com/android/launcher3/ModelCallbacks.kt
new file mode 100644
index 0000000..679f7d4
--- /dev/null
+++ b/src/com/android/launcher3/ModelCallbacks.kt
@@ -0,0 +1,96 @@
+package com.android.launcher3
+
+import androidx.annotation.UiThread
+import com.android.launcher3.model.BgDataModel
+import com.android.launcher3.model.data.AppInfo
+import com.android.launcher3.model.data.ItemInfo
+import com.android.launcher3.model.data.LauncherAppWidgetInfo
+import com.android.launcher3.model.data.WorkspaceItemInfo
+import com.android.launcher3.popup.PopupContainerWithArrow
+import com.android.launcher3.util.ComponentKey
+import com.android.launcher3.util.PackageUserKey
+import com.android.launcher3.util.Preconditions
+import com.android.launcher3.widget.model.WidgetsListBaseEntry
+import java.util.function.Predicate
+
+class ModelCallbacks(private var launcher: Launcher) : BgDataModel.Callbacks {
+    override fun preAddApps() {
+        // If there's an undo snackbar, force it to complete to ensure empty screens are removed
+        // before trying to add new items.
+        launcher.modelWriter.commitDelete()
+        val snackbar =
+            AbstractFloatingView.getOpenView<AbstractFloatingView>(
+                launcher,
+                AbstractFloatingView.TYPE_SNACKBAR
+            )
+        snackbar?.post { snackbar.close(true) }
+    }
+
+    @UiThread
+    override fun bindAllApplications(
+        apps: Array<AppInfo?>?,
+        flags: Int,
+        packageUserKeytoUidMap: Map<PackageUserKey?, Int?>?
+    ) {
+        Preconditions.assertUIThread()
+        val hadWorkApps = launcher.appsView.shouldShowTabs()
+        launcher.appsView.appsStore.setApps(apps, flags, packageUserKeytoUidMap)
+        PopupContainerWithArrow.dismissInvalidPopup(launcher)
+        if (hadWorkApps != launcher.appsView.shouldShowTabs()) {
+            launcher.stateManager.goToState(LauncherState.NORMAL)
+        }
+    }
+
+    /**
+     * Copies LauncherModel's map of activities to shortcut counts to Launcher's. This is necessary
+     * because LauncherModel's map is updated in the background, while Launcher runs on the UI.
+     */
+    override fun bindDeepShortcutMap(deepShortcutMapCopy: HashMap<ComponentKey?, Int?>?) {
+        launcher.popupDataProvider.setDeepShortcutMap(deepShortcutMapCopy)
+    }
+
+    override fun bindIncrementalDownloadProgressUpdated(app: AppInfo?) {
+        launcher.appsView.appsStore.updateProgressBar(app)
+    }
+
+    override fun bindWidgetsRestored(widgets: ArrayList<LauncherAppWidgetInfo?>?) {
+        launcher.workspace.widgetsRestored(widgets)
+    }
+
+    /**
+     * Some shortcuts were updated in the background. Implementation of the method from
+     * LauncherModel.Callbacks.
+     *
+     * @param updated list of shortcuts which have changed.
+     */
+    override fun bindWorkspaceItemsChanged(updated: List<WorkspaceItemInfo?>) {
+        if (updated.isNotEmpty()) {
+            launcher.workspace.updateWorkspaceItems(updated, launcher)
+            PopupContainerWithArrow.dismissInvalidPopup(launcher)
+        }
+    }
+
+    /**
+     * Update the state of a package, typically related to install state. Implementation of the
+     * method from LauncherModel.Callbacks.
+     */
+    override fun bindRestoreItemsChange(updates: HashSet<ItemInfo?>?) {
+        launcher.workspace.updateRestoreItems(updates, launcher)
+    }
+
+    /**
+     * A package was uninstalled/updated. We take both the super set of packageNames in addition to
+     * specific applications to remove, the reason being that this can be called when a package is
+     * updated as well. In that scenario, we only remove specific components from the workspace and
+     * hotseat, where as package-removal should clear all items by package name.
+     */
+    override fun bindWorkspaceComponentsRemoved(matcher: Predicate<ItemInfo?>?) {
+        launcher.workspace.removeItemsByMatcher(matcher)
+        launcher.dragController.onAppsRemoved(matcher)
+        PopupContainerWithArrow.dismissInvalidPopup(launcher)
+    }
+
+    override fun bindAllWidgets(allWidgets: List<WidgetsListBaseEntry?>?) {
+        launcher.popupDataProvider.allWidgets = allWidgets
+    }
+}