diff --git a/go/AndroidManifest.xml b/go/AndroidManifest.xml
index 0a9ad7b5ad..0080898624 100644
--- a/go/AndroidManifest.xml
+++ b/go/AndroidManifest.xml
@@ -36,16 +36,14 @@
         android:restoreAnyVersion="true"
         android:supportsRtl="true" >
 
-        <!-- Activity for handling PinItemRequest. Only supports shortcuts -->
+        <!-- Activity for handling PinItemRequest is disabled on Android Go. -->
         <activity android:name="com.android.launcher3.dragndrop.AddItemActivity"
             android:theme="@android:style/Theme.DeviceDefault.Light.Dialog.Alert"
             android:excludeFromRecents="true"
             android:autoRemoveFromRecents="true"
             android:label="@string/action_add_to_workspace"
+            android:enabled="false"
             tools:node="replace" >
-            <intent-filter>
-                <action android:name="android.content.pm.action.CONFIRM_PIN_SHORTCUT" />
-            </intent-filter>
         </activity>
 
     </application>
diff --git a/go/res/layout/widget_cell_content.xml b/go/res/layout/widget_cell_content.xml
deleted file mode 100644
index 49506d9bec..0000000000
--- a/go/res/layout/widget_cell_content.xml
+++ /dev/null
@@ -1,66 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Copyright (C) 2017 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.
--->
-<merge xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="wrap_content"
-    android:layout_height="wrap_content">
-
-    <LinearLayout
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:paddingTop="@dimen/widget_preview_label_vertical_padding"
-        android:paddingBottom="@dimen/widget_preview_label_vertical_padding"
-        android:paddingLeft="@dimen/widget_preview_label_horizontal_padding"
-        android:paddingRight="@dimen/widget_preview_label_horizontal_padding"
-        android:orientation="horizontal">
-
-        <!-- The name of the widget. -->
-        <TextView
-            android:id="@+id/widget_name"
-            android:layout_width="0dp"
-            android:layout_height="wrap_content"
-            android:layout_weight="1"
-            android:ellipsize="end"
-            android:fadingEdge="horizontal"
-            android:fontFamily="sans-serif-condensed"
-            android:gravity="center"
-            android:singleLine="true"
-            android:maxLines="1"
-            android:textColor="?android:attr/textColorSecondary"
-            android:textSize="14sp" />
-
-        <!-- The original dimensions of the widget (can't be the same text as above due to different
-             style. -->
-        <TextView
-            android:id="@+id/widget_dims"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_marginStart="5dp"
-            android:layout_marginLeft="5dp"
-            android:visibility="gone"
-            android:textColor="?android:attr/textColorSecondary"
-            android:textSize="14sp"
-            android:fontFamily="sans-serif-condensed"
-            android:alpha="0.8" />
-    </LinearLayout>
-
-    <!-- The image of the widget. This view does not support padding. Any placement adjustment
-         should be done using margins. -->
-    <com.android.launcher3.widget.WidgetImageView
-        android:id="@+id/widget_preview"
-        android:layout_width="match_parent"
-        android:layout_height="0dp"
-        android:layout_weight="1" />
-</merge>
\ No newline at end of file
diff --git a/iconloaderlib/build.gradle b/iconloaderlib/build.gradle
index d08029386a..a6433ad1a6 100644
--- a/iconloaderlib/build.gradle
+++ b/iconloaderlib/build.gradle
@@ -37,6 +37,11 @@ android {
     tasks.withType(JavaCompile) {
         options.compilerArgs << "-Xlint:unchecked" << "-Xlint:deprecation"
     }
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
 }
 
 
diff --git a/src/com/android/launcher3/graphics/BitmapRenderer.java b/iconloaderlib/src/com/android/launcher3/icons/BitmapRenderer.java
similarity index 92%
rename from src/com/android/launcher3/graphics/BitmapRenderer.java
rename to iconloaderlib/src/com/android/launcher3/icons/BitmapRenderer.java
index 2a7f20ea33..a66b929efb 100644
--- a/src/com/android/launcher3/graphics/BitmapRenderer.java
+++ b/iconloaderlib/src/com/android/launcher3/icons/BitmapRenderer.java
@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package com.android.launcher3.graphics;
+package com.android.launcher3.icons;
 
 import android.annotation.TargetApi;
 import android.graphics.Bitmap;
@@ -21,14 +21,12 @@ import android.graphics.Canvas;
 import android.graphics.Picture;
 import android.os.Build;
 
-import com.android.launcher3.Utilities;
-
 /**
  * Interface representing a bitmap draw operation.
  */
 public interface BitmapRenderer {
 
-    boolean USE_HARDWARE_BITMAP = Utilities.ATLEAST_P;
+    boolean USE_HARDWARE_BITMAP = Build.VERSION.SDK_INT >= Build.VERSION_CODES.P;
 
     static Bitmap createSoftwareBitmap(int width, int height, BitmapRenderer renderer) {
         Bitmap result = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
diff --git a/iconloaderlib/src/com/android/launcher3/icons/GraphicsUtils.java b/iconloaderlib/src/com/android/launcher3/icons/GraphicsUtils.java
index b096cecb5c..11d5eef52c 100644
--- a/iconloaderlib/src/com/android/launcher3/icons/GraphicsUtils.java
+++ b/iconloaderlib/src/com/android/launcher3/icons/GraphicsUtils.java
@@ -15,10 +15,18 @@
  */
 package com.android.launcher3.icons;
 
+import android.graphics.Bitmap;
+import android.util.Log;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+
 import androidx.annotation.ColorInt;
 
 public class GraphicsUtils {
 
+    private static final String TAG = "GraphicsUtils";
+
     /**
      * Set the alpha component of {@code color} to be {@code alpha}. Unlike the support lib version,
      * it bounds the alpha in valid range instead of throwing an exception to allow for safer
@@ -33,4 +41,23 @@ public class GraphicsUtils {
         }
         return (color & 0x00ffffff) | (alpha << 24);
     }
+
+    /**
+     * Compresses the bitmap to a byte array for serialization.
+     */
+    public static byte[] flattenBitmap(Bitmap bitmap) {
+        // Try go guesstimate how much space the icon will take when serialized
+        // to avoid unnecessary allocations/copies during the write (4 bytes per pixel).
+        int size = bitmap.getWidth() * bitmap.getHeight() * 4;
+        ByteArrayOutputStream out = new ByteArrayOutputStream(size);
+        try {
+            bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
+            out.flush();
+            out.close();
+            return out.toByteArray();
+        } catch (IOException e) {
+            Log.w(TAG, "Could not write bitmap");
+            return null;
+        }
+    }
 }
diff --git a/src/com/android/launcher3/util/ComponentKey.java b/iconloaderlib/src/com/android/launcher3/util/ComponentKey.java
similarity index 93%
rename from src/com/android/launcher3/util/ComponentKey.java
rename to iconloaderlib/src/com/android/launcher3/util/ComponentKey.java
index d478ffa541..34bed94270 100644
--- a/src/com/android/launcher3/util/ComponentKey.java
+++ b/iconloaderlib/src/com/android/launcher3/util/ComponentKey.java
@@ -29,8 +29,9 @@ public class ComponentKey {
     private final int mHashCode;
 
     public ComponentKey(ComponentName componentName, UserHandle user) {
-        Preconditions.assertNotNull(componentName);
-        Preconditions.assertNotNull(user);
+        if (componentName == null || user == null) {
+            throw new NullPointerException();
+        }
         this.componentName = componentName;
         this.user = user;
         mHashCode = Arrays.hashCode(new Object[] {componentName, user});
diff --git a/src/com/android/launcher3/util/NoLocaleSQLiteHelper.java b/iconloaderlib/src/com/android/launcher3/util/NoLocaleSQLiteHelper.java
similarity index 94%
rename from src/com/android/launcher3/util/NoLocaleSQLiteHelper.java
rename to iconloaderlib/src/com/android/launcher3/util/NoLocaleSQLiteHelper.java
index 05a7d27434..fe864a2847 100644
--- a/src/com/android/launcher3/util/NoLocaleSQLiteHelper.java
+++ b/iconloaderlib/src/com/android/launcher3/util/NoLocaleSQLiteHelper.java
@@ -18,8 +18,6 @@ package com.android.launcher3.util;
 
 import static android.database.sqlite.SQLiteDatabase.NO_LOCALIZED_COLLATORS;
 
-import static com.android.launcher3.Utilities.ATLEAST_P;
-
 import android.content.Context;
 import android.content.ContextWrapper;
 import android.database.DatabaseErrorHandler;
@@ -27,6 +25,7 @@ import android.database.sqlite.SQLiteDatabase;
 import android.database.sqlite.SQLiteDatabase.CursorFactory;
 import android.database.sqlite.SQLiteDatabase.OpenParams;
 import android.database.sqlite.SQLiteOpenHelper;
+import android.os.Build;
 
 /**
  * Extension of {@link SQLiteOpenHelper} which avoids creating default locale table by
@@ -34,6 +33,9 @@ import android.database.sqlite.SQLiteOpenHelper;
  */
 public abstract class NoLocaleSQLiteHelper extends SQLiteOpenHelper {
 
+    private static final boolean ATLEAST_P =
+            Build.VERSION.SDK_INT >= Build.VERSION_CODES.P;
+
     public NoLocaleSQLiteHelper(Context context, String name, int version) {
         super(ATLEAST_P ? context : new NoLocalContext(context), name, null, version);
         if (ATLEAST_P) {
diff --git a/src/com/android/launcher3/util/Provider.java b/iconloaderlib/src/com/android/launcher3/util/Provider.java
similarity index 100%
rename from src/com/android/launcher3/util/Provider.java
rename to iconloaderlib/src/com/android/launcher3/util/Provider.java
diff --git a/src/com/android/launcher3/util/SQLiteCacheHelper.java b/iconloaderlib/src/com/android/launcher3/util/SQLiteCacheHelper.java
similarity index 93%
rename from src/com/android/launcher3/util/SQLiteCacheHelper.java
rename to iconloaderlib/src/com/android/launcher3/util/SQLiteCacheHelper.java
index 3faf0709a9..49de4bd1bf 100644
--- a/src/com/android/launcher3/util/SQLiteCacheHelper.java
+++ b/iconloaderlib/src/com/android/launcher3/util/SQLiteCacheHelper.java
@@ -9,9 +9,6 @@ import android.database.sqlite.SQLiteFullException;
 import android.database.sqlite.SQLiteOpenHelper;
 import android.util.Log;
 
-import com.android.launcher3.Utilities;
-import com.android.launcher3.config.FeatureFlags;
-
 /**
  * An extension of {@link SQLiteOpenHelper} with utility methods for a single table cache DB.
  * Any exception during write operations are ignored, and any version change causes a DB reset.
@@ -19,8 +16,7 @@ import com.android.launcher3.config.FeatureFlags;
 public abstract class SQLiteCacheHelper {
     private static final String TAG = "SQLiteCacheHelper";
 
-    private static final boolean NO_ICON_CACHE = FeatureFlags.IS_DOGFOOD_BUILD &&
-            Utilities.isPropertyEnabled(LogConfig.MEMORY_ONLY_ICON_CACHE);
+    private static final boolean IN_MEMORY_CACHE = false;
 
     private final String mTableName;
     private final MySQLiteOpenHelper mOpenHelper;
@@ -28,7 +24,7 @@ public abstract class SQLiteCacheHelper {
     private boolean mIgnoreWrites;
 
     public SQLiteCacheHelper(Context context, String name, int version, String tableName) {
-        if (NO_ICON_CACHE) {
+        if (IN_MEMORY_CACHE) {
             name = null;
         }
         mTableName = tableName;
diff --git a/proguard.flags b/proguard.flags
index bb52a6c9e9..eb27737d4a 100644
--- a/proguard.flags
+++ b/proguard.flags
@@ -24,7 +24,7 @@
 -keep class androidx.recyclerview.widget.RecyclerView { *; }
 
 # Preference fragments
--keep class ** extends android.preference.PreferenceFragment {
+-keep class ** extends android.app.Fragment {
     public <init>(...);
 }
 
diff --git a/quickstep/src/com/android/quickstep/views/TaskView.java b/quickstep/src/com/android/quickstep/views/TaskView.java
index 301b08a3f7..79c988d321 100644
--- a/quickstep/src/com/android/quickstep/views/TaskView.java
+++ b/quickstep/src/com/android/quickstep/views/TaskView.java
@@ -462,7 +462,7 @@ public class TaskView extends FrameLayout implements PageCallbacks {
         }
 
         if (action == R.string.accessibility_app_usage_settings) {
-            openAppUsageSettings();
+            openAppUsageSettings(this);
             return true;
         }
 
@@ -484,14 +484,16 @@ public class TaskView extends FrameLayout implements PageCallbacks {
         return super.performAccessibilityAction(action, arguments);
     }
 
-    private void openAppUsageSettings() {
+    private void openAppUsageSettings(View view) {
         final Intent intent = new Intent(SEE_TIME_IN_APP_TEMPLATE)
                 .putExtra(Intent.EXTRA_PACKAGE_NAME,
                         mTask.getTopComponent().getPackageName()).addFlags(
                         Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
         try {
             final Launcher launcher = Launcher.getLauncher(getContext());
-            launcher.startActivity(intent);
+            final ActivityOptions options = ActivityOptions.makeScaleUpAnimation(view, 0, 0,
+                    view.getWidth(), view.getHeight());
+            launcher.startActivity(intent, options.toBundle());
             launcher.getUserEventDispatcher().logActionOnControl(LauncherLogProto.Action.Touch.TAP,
                     LauncherLogProto.ControlType.APP_USAGE_SETTINGS, this);
         } catch (ActivityNotFoundException e) {
diff --git a/res/layout/all_apps.xml b/res/layout/all_apps.xml
index b1e6f2efd7..33ff46b910 100644
--- a/res/layout/all_apps.xml
+++ b/res/layout/all_apps.xml
@@ -30,7 +30,50 @@
         layout="@layout/all_apps_rv_layout"
         android:visibility="gone" />
 
-    <include layout="@layout/all_apps_floating_header" />
+    <com.android.launcher3.allapps.FloatingHeaderView
+        android:id="@+id/all_apps_header"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_below="@id/search_container_all_apps"
+        android:clipToPadding="false"
+        android:paddingTop="@dimen/all_apps_header_top_padding"
+        android:orientation="vertical" >
+
+        <include layout="@layout/floating_header_content" />
+
+        <com.android.launcher3.allapps.PersonalWorkSlidingTabStrip
+            android:id="@+id/tabs"
+            android:layout_width="match_parent"
+            android:layout_height="@dimen/all_apps_header_tab_height"
+            android:layout_marginLeft="@dimen/all_apps_tabs_side_padding"
+            android:layout_marginRight="@dimen/all_apps_tabs_side_padding"
+            android:orientation="horizontal">
+
+            <Button
+                android:id="@+id/tab_personal"
+                android:layout_width="0dp"
+                android:layout_height="match_parent"
+                android:layout_weight="1"
+                android:background="?android:attr/selectableItemBackground"
+                android:fontFamily="sans-serif-medium"
+                android:text="@string/all_apps_personal_tab"
+                android:textAllCaps="true"
+                android:textColor="@color/all_apps_tab_text"
+                android:textSize="14sp" />
+
+            <Button
+                android:id="@+id/tab_work"
+                android:layout_width="0dp"
+                android:layout_height="match_parent"
+                android:layout_weight="1"
+                android:background="?android:attr/selectableItemBackground"
+                android:fontFamily="sans-serif-medium"
+                android:text="@string/all_apps_work_tab"
+                android:textAllCaps="true"
+                android:textColor="@color/all_apps_tab_text"
+                android:textSize="14sp" />
+        </com.android.launcher3.allapps.PersonalWorkSlidingTabStrip>
+    </com.android.launcher3.allapps.FloatingHeaderView>
 
     <include
         android:id="@id/search_container_all_apps"
diff --git a/res/layout/all_apps_floating_header.xml b/res/layout/all_apps_floating_header.xml
deleted file mode 100644
index c4240f80db..0000000000
--- a/res/layout/all_apps_floating_header.xml
+++ /dev/null
@@ -1,58 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Copyright (C) 2018 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.
--->
-<com.android.launcher3.allapps.FloatingHeaderView
-    xmlns:android="http://schemas.android.com/apk/res/android"
-    android:id="@+id/all_apps_header"
-    android:layout_width="match_parent"
-    android:layout_height="wrap_content"
-    android:layout_below="@id/search_container_all_apps"
-    android:clipToPadding="false"
-    android:paddingTop="@dimen/all_apps_header_top_padding"
-    android:orientation="vertical" >
-
-    <com.android.launcher3.allapps.PersonalWorkSlidingTabStrip
-        android:id="@+id/tabs"
-        android:layout_width="match_parent"
-        android:layout_height="@dimen/all_apps_header_tab_height"
-        android:layout_marginLeft="@dimen/all_apps_tabs_side_padding"
-        android:layout_marginRight="@dimen/all_apps_tabs_side_padding"
-        android:orientation="horizontal">
-
-        <Button
-            android:id="@+id/tab_personal"
-            android:layout_width="0dp"
-            android:layout_height="match_parent"
-            android:layout_weight="1"
-            android:background="?android:attr/selectableItemBackground"
-            android:fontFamily="sans-serif-medium"
-            android:text="@string/all_apps_personal_tab"
-            android:textAllCaps="true"
-            android:textColor="@color/all_apps_tab_text"
-            android:textSize="14sp" />
-
-        <Button
-            android:id="@+id/tab_work"
-            android:layout_width="0dp"
-            android:layout_height="match_parent"
-            android:layout_weight="1"
-            android:background="?android:attr/selectableItemBackground"
-            android:fontFamily="sans-serif-medium"
-            android:text="@string/all_apps_work_tab"
-            android:textAllCaps="true"
-            android:textColor="@color/all_apps_tab_text"
-            android:textSize="14sp" />
-    </com.android.launcher3.allapps.PersonalWorkSlidingTabStrip>
-</com.android.launcher3.allapps.FloatingHeaderView>
diff --git a/res/layout/floating_header_content.xml b/res/layout/floating_header_content.xml
new file mode 100644
index 0000000000..e4061c20d3
--- /dev/null
+++ b/res/layout/floating_header_content.xml
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2018 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.
+-->
+<merge />
\ No newline at end of file
diff --git a/src/com/android/launcher3/AutoInstallsLayout.java b/src/com/android/launcher3/AutoInstallsLayout.java
index c7c1d6ac0e..e5b1448b13 100644
--- a/src/com/android/launcher3/AutoInstallsLayout.java
+++ b/src/com/android/launcher3/AutoInstallsLayout.java
@@ -39,6 +39,7 @@ import android.util.Patterns;
 
 import com.android.launcher3.LauncherProvider.SqlArguments;
 import com.android.launcher3.LauncherSettings.Favorites;
+import com.android.launcher3.icons.GraphicsUtils;
 import com.android.launcher3.icons.LauncherIcons;
 import com.android.launcher3.util.IntArray;
 import com.android.launcher3.util.Thunk;
@@ -47,7 +48,6 @@ import org.xmlpull.v1.XmlPullParser;
 import org.xmlpull.v1.XmlPullParserException;
 
 import java.io.IOException;
-import java.util.ArrayList;
 import java.util.Locale;
 
 /**
@@ -436,7 +436,7 @@ public class AutoInstallsLayout {
 
             // Auto installs should always support the current platform version.
             LauncherIcons li = LauncherIcons.obtain(mContext);
-            mValues.put(LauncherSettings.Favorites.ICON, Utilities.flattenBitmap(
+            mValues.put(LauncherSettings.Favorites.ICON, GraphicsUtils.flattenBitmap(
                     li.createBadgedIconBitmap(icon, Process.myUserHandle(), VERSION.SDK_INT).icon));
             li.recycle();
 
diff --git a/src/com/android/launcher3/InstallShortcutReceiver.java b/src/com/android/launcher3/InstallShortcutReceiver.java
index 73c999a923..ea59fff724 100644
--- a/src/com/android/launcher3/InstallShortcutReceiver.java
+++ b/src/com/android/launcher3/InstallShortcutReceiver.java
@@ -41,6 +41,7 @@ import android.util.Pair;
 import com.android.launcher3.compat.LauncherAppsCompat;
 import com.android.launcher3.compat.UserManagerCompat;
 import com.android.launcher3.icons.BitmapInfo;
+import com.android.launcher3.icons.GraphicsUtils;
 import com.android.launcher3.icons.LauncherIcons;
 import com.android.launcher3.shortcuts.DeepShortcutManager;
 import com.android.launcher3.shortcuts.ShortcutInfoCompat;
@@ -457,7 +458,7 @@ public class InstallShortcutReceiver extends BroadcastReceiver {
                     .key(LAUNCH_INTENT_KEY).value(launchIntent.toUri(0))
                     .key(NAME_KEY).value(name);
                 if (icon != null) {
-                    byte[] iconByteArray = Utilities.flattenBitmap(icon);
+                    byte[] iconByteArray = GraphicsUtils.flattenBitmap(icon);
                     json = json.key(ICON_KEY).value(
                             Base64.encodeToString(
                                     iconByteArray, 0, iconByteArray.length, Base64.DEFAULT));
diff --git a/src/com/android/launcher3/Utilities.java b/src/com/android/launcher3/Utilities.java
index d11cfcb0cb..65f0703278 100644
--- a/src/com/android/launcher3/Utilities.java
+++ b/src/com/android/launcher3/Utilities.java
@@ -356,25 +356,6 @@ public final class Utilities {
         return null;
     }
 
-    /**
-     * Compresses the bitmap to a byte array for serialization.
-     */
-    public static byte[] flattenBitmap(Bitmap bitmap) {
-        // Try go guesstimate how much space the icon will take when serialized
-        // to avoid unnecessary allocations/copies during the write.
-        int size = bitmap.getWidth() * bitmap.getHeight() * 4;
-        ByteArrayOutputStream out = new ByteArrayOutputStream(size);
-        try {
-            bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
-            out.flush();
-            out.close();
-            return out.toByteArray();
-        } catch (IOException e) {
-            Log.w(TAG, "Could not write bitmap");
-            return null;
-        }
-    }
-
     /**
      * Trims the string, removing all whitespace at the beginning and end of the string.
      * Non-breaking whitespaces are also removed.
diff --git a/src/com/android/launcher3/WidgetPreviewLoader.java b/src/com/android/launcher3/WidgetPreviewLoader.java
index d47dcee92c..050849cc2b 100644
--- a/src/com/android/launcher3/WidgetPreviewLoader.java
+++ b/src/com/android/launcher3/WidgetPreviewLoader.java
@@ -31,6 +31,7 @@ import android.util.LongSparseArray;
 import com.android.launcher3.compat.AppWidgetManagerCompat;
 import com.android.launcher3.compat.ShortcutConfigActivityInfo;
 import com.android.launcher3.compat.UserManagerCompat;
+import com.android.launcher3.icons.GraphicsUtils;
 import com.android.launcher3.icons.LauncherIcons;
 import com.android.launcher3.icons.ShadowGenerator;
 import com.android.launcher3.icons.IconCache;
@@ -149,7 +150,7 @@ public class WidgetPreviewLoader {
         values.put(CacheDb.COLUMN_PACKAGE, key.componentName.getPackageName());
         values.put(CacheDb.COLUMN_VERSION, versions[0]);
         values.put(CacheDb.COLUMN_LAST_UPDATED, versions[1]);
-        values.put(CacheDb.COLUMN_PREVIEW_BITMAP, Utilities.flattenBitmap(preview));
+        values.put(CacheDb.COLUMN_PREVIEW_BITMAP, GraphicsUtils.flattenBitmap(preview));
         mDb.insertOrReplace(values);
     }
 
diff --git a/src/com/android/launcher3/Workspace.java b/src/com/android/launcher3/Workspace.java
index 7a8d984d74..96df810323 100644
--- a/src/com/android/launcher3/Workspace.java
+++ b/src/com/android/launcher3/Workspace.java
@@ -1625,7 +1625,7 @@ public class Workspace extends PagedView<WorkspacePageIndicator>
             mDragViewVisualCenter = d.getVisualCenter(mDragViewVisualCenter);
 
             // We want the point to be mapped to the dragTarget.
-            mapPointFromDropLayout(mLauncher.getHotseat(), mDragViewVisualCenter);
+            mapPointFromDropLayout(dropTargetLayout, mDragViewVisualCenter);
 
             int spanX;
             int spanY;
@@ -1827,7 +1827,7 @@ public class Workspace extends PagedView<WorkspacePageIndicator>
 
         // We want the point to be mapped to the dragTarget.
         if (dropTargetLayout != null) {
-            mapPointFromDropLayout(mLauncher.getHotseat(), mDragViewVisualCenter);
+            mapPointFromDropLayout(dropTargetLayout, mDragViewVisualCenter);
         }
 
         boolean droppedOnOriginalCell = false;
@@ -2255,7 +2255,7 @@ public class Workspace extends PagedView<WorkspacePageIndicator>
         // Handle the drag over
         if (mDragTargetLayout != null) {
             // We want the point to be mapped to the dragTarget.
-            mapPointFromDropLayout(mLauncher.getHotseat(), mDragViewVisualCenter);
+            mapPointFromDropLayout(mDragTargetLayout, mDragViewVisualCenter);
 
             int minSpanX = item.spanX;
             int minSpanY = item.spanY;
diff --git a/src/com/android/launcher3/allapps/FloatingHeaderRow.java b/src/com/android/launcher3/allapps/FloatingHeaderRow.java
new file mode 100644
index 0000000000..922e4f1a3f
--- /dev/null
+++ b/src/com/android/launcher3/allapps/FloatingHeaderRow.java
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2018 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.allapps;
+
+import android.graphics.Rect;
+import android.view.animation.Interpolator;
+
+import com.android.launcher3.DeviceProfile;
+import com.android.launcher3.anim.PropertySetter;
+
+/**
+ * A abstract representation of a row in all-apps view
+ */
+public interface FloatingHeaderRow {
+
+    FloatingHeaderRow[] NO_ROWS = new FloatingHeaderRow[0];
+
+    void setup(FloatingHeaderView parent, FloatingHeaderRow[] allRows, boolean tabsHidden);
+
+    void setInsets(Rect insets, DeviceProfile grid);
+
+    int getExpectedHeight();
+
+    /**
+     * Returns true if the row should draw based on its current position and layout.
+     */
+    boolean shouldDraw();
+
+    /**
+     * Returns true if the view has anything worth drawing. This is different than
+     * {@link #shouldDraw()} as this is called earlier in the layout to determine the view
+     * position.
+     */
+    boolean hasVisibleContent();
+
+    void setContentVisibility(boolean hasHeaderExtra, boolean hasContent,
+            PropertySetter setter, Interpolator fadeInterpolator);
+
+    /**
+     * Scrolls the content vertically.
+     */
+    void setVerticalScroll(int scroll, boolean isScrolledOut);
+
+    Class<? extends FloatingHeaderRow> getTypeClass();
+}
diff --git a/src/com/android/launcher3/allapps/FloatingHeaderView.java b/src/com/android/launcher3/allapps/FloatingHeaderView.java
index 90e195b2b3..66dced99d3 100644
--- a/src/com/android/launcher3/allapps/FloatingHeaderView.java
+++ b/src/com/android/launcher3/allapps/FloatingHeaderView.java
@@ -19,28 +19,34 @@ import android.animation.ValueAnimator;
 import android.content.Context;
 import android.graphics.Point;
 import android.graphics.Rect;
+import android.util.ArrayMap;
 import android.util.AttributeSet;
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.animation.Interpolator;
 import android.widget.LinearLayout;
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-import androidx.recyclerview.widget.RecyclerView;
+
+import com.android.launcher3.DeviceProfile;
+import com.android.launcher3.Insettable;
+import com.android.launcher3.Launcher;
 import com.android.launcher3.R;
 import com.android.launcher3.anim.PropertySetter;
 import com.android.launcher3.uioverrides.plugins.PluginManagerWrapper;
 import com.android.systemui.plugins.AllAppsRow;
+import com.android.systemui.plugins.AllAppsRow.OnHeightUpdatedListener;
 import com.android.systemui.plugins.PluginListener;
 
 import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
 import java.util.Map;
 
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.recyclerview.widget.RecyclerView;
+
 public class FloatingHeaderView extends LinearLayout implements
-        ValueAnimator.AnimatorUpdateListener, PluginListener<AllAppsRow> {
+        ValueAnimator.AnimatorUpdateListener, PluginListener<AllAppsRow>, Insettable,
+        OnHeightUpdatedListener {
 
     private final Rect mClip = new Rect(0, 0, Integer.MAX_VALUE, Integer.MAX_VALUE);
     private final ValueAnimator mAnimator = ValueAnimator.ofInt(0, 0);
@@ -62,17 +68,18 @@ public class FloatingHeaderView extends LinearLayout implements
 
             int current = -mCurrentRV.getCurrentScrollY();
             moved(current);
-            apply();
+            applyVerticalMove();
         }
     };
 
+    private final int mHeaderTopPadding;
+
+    protected final Map<AllAppsRow, PluginHeaderRow> mPluginRows = new ArrayMap<>();
+
     protected ViewGroup mTabLayout;
     private AllAppsRecyclerView mMainRV;
     private AllAppsRecyclerView mWorkRV;
     private AllAppsRecyclerView mCurrentRV;
-    protected final Map<AllAppsRow, View> mPluginRows;
-    // Contains just the values of the above map so we can iterate without extracting a new list.
-    protected final List<View> mPluginRowViews;
     private ViewGroup mParent;
     private boolean mHeaderCollapsed;
     private int mSnappedScrolledY;
@@ -85,20 +92,42 @@ public class FloatingHeaderView extends LinearLayout implements
     protected int mMaxTranslation;
     private boolean mMainRVActive = true;
 
+    private boolean mCollapsed = false;
+
+    // This is initialized once during inflation and stays constant after that. Fixed views
+    // cannot be added or removed dynamically.
+    private FloatingHeaderRow[] mFixedRows = FloatingHeaderRow.NO_ROWS;
+
+    // Array of all fixed rows and plugin rows. This is initialized every time a plugin is
+    // enabled or disabled, and represent the current set of all rows.
+    private FloatingHeaderRow[] mAllRows = FloatingHeaderRow.NO_ROWS;
+
     public FloatingHeaderView(@NonNull Context context) {
         this(context, null);
     }
 
     public FloatingHeaderView(@NonNull Context context, @Nullable AttributeSet attrs) {
         super(context, attrs);
-        mPluginRows = new HashMap<>();
-        mPluginRowViews = new ArrayList<>();
+        mHeaderTopPadding = context.getResources()
+                .getDimensionPixelSize(R.dimen.all_apps_header_top_padding);
     }
 
     @Override
     protected void onFinishInflate() {
         super.onFinishInflate();
         mTabLayout = findViewById(R.id.tabs);
+
+        // Find all floating header rows.
+        ArrayList<FloatingHeaderRow> rows = new ArrayList<>();
+        int count = getChildCount();
+        for (int i = 0; i < count; i++) {
+            View child = getChildAt(i);
+            if (child instanceof FloatingHeaderRow) {
+                rows.add((FloatingHeaderRow) child);
+            }
+        }
+        mFixedRows = rows.toArray(new FloatingHeaderRow[rows.size()]);
+        mAllRows = mFixedRows;
     }
 
     @Override
@@ -114,50 +143,70 @@ public class FloatingHeaderView extends LinearLayout implements
         PluginManagerWrapper.INSTANCE.get(getContext()).removePluginListener(this);
     }
 
-    @Override
-    public void onPluginConnected(AllAppsRow allAppsRowPlugin, Context context) {
-        mPluginRows.put(allAppsRowPlugin, null);
-        setupPluginRows();
-        allAppsRowPlugin.setOnHeightUpdatedListener(this::onPluginRowHeightUpdated);
+    private void recreateAllRowsArray() {
+        int pluginCount = mPluginRows.size();
+        if (pluginCount == 0) {
+            mAllRows = mFixedRows;
+        } else {
+            int count = mFixedRows.length;
+            mAllRows = new FloatingHeaderRow[count + pluginCount];
+            for (int i = 0; i < count; i++) {
+                mAllRows[i] = mFixedRows[i];
+            }
+
+            for (PluginHeaderRow row : mPluginRows.values()) {
+                mAllRows[count] = row;
+                count++;
+            }
+        }
     }
 
-    protected void onPluginRowHeightUpdated() {
+    @Override
+    public void onPluginConnected(AllAppsRow allAppsRowPlugin, Context context) {
+        PluginHeaderRow headerRow = new PluginHeaderRow(allAppsRowPlugin, this);
+        addView(headerRow.mView, indexOfChild(mTabLayout));
+        mPluginRows.put(allAppsRowPlugin, headerRow);
+        recreateAllRowsArray();
+        allAppsRowPlugin.setOnHeightUpdatedListener(this);
+    }
+
+    @Override
+    public void onHeightUpdated() {
+        int oldMaxHeight = mMaxTranslation;
+        updateExpectedHeight();
+
+        if (mMaxTranslation != oldMaxHeight) {
+            AllAppsContainerView parent = (AllAppsContainerView) getParent();
+            if (parent != null) {
+                parent.setupHeader();
+            }
+        }
     }
 
     @Override
     public void onPluginDisconnected(AllAppsRow plugin) {
-        View pluginRowView = mPluginRows.get(plugin);
-        removeView(pluginRowView);
+        PluginHeaderRow row = mPluginRows.get(plugin);
+        removeView(row.mView);
         mPluginRows.remove(plugin);
-        mPluginRowViews.remove(pluginRowView);
-        onPluginRowHeightUpdated();
+        recreateAllRowsArray();
+        onHeightUpdated();
     }
 
     public void setup(AllAppsContainerView.AdapterHolder[] mAH, boolean tabsHidden) {
+        for (FloatingHeaderRow row : mAllRows) {
+            row.setup(this, mAllRows, tabsHidden);
+        }
+        updateExpectedHeight();
+
         mTabsHidden = tabsHidden;
         mTabLayout.setVisibility(tabsHidden ? View.GONE : View.VISIBLE);
         mMainRV = setupRV(mMainRV, mAH[AllAppsContainerView.AdapterHolder.MAIN].recyclerView);
         mWorkRV = setupRV(mWorkRV, mAH[AllAppsContainerView.AdapterHolder.WORK].recyclerView);
         mParent = (ViewGroup) mMainRV.getParent();
         setMainActive(mMainRVActive || mWorkRV == null);
-        setupPluginRows();
         reset(false);
     }
 
-    private void setupPluginRows() {
-        for (Map.Entry<AllAppsRow, View> rowPluginEntry : mPluginRows.entrySet()) {
-            if (rowPluginEntry.getValue() == null) {
-                View pluginRow = rowPluginEntry.getKey().setup(this);
-                addView(pluginRow, indexOfChild(mTabLayout));
-                rowPluginEntry.setValue(pluginRow);
-                mPluginRowViews.add(pluginRow);
-            }
-        }
-        for (View plugin : mPluginRowViews) {
-            plugin.setVisibility(mHeaderCollapsed ? GONE : VISIBLE);
-        }
-    }
-
     private AllAppsRecyclerView setupRV(AllAppsRecyclerView old, AllAppsRecyclerView updated) {
         if (old != updated && updated != null ) {
             updated.addOnScrollListener(mOnScrollListener);
@@ -165,6 +214,16 @@ public class FloatingHeaderView extends LinearLayout implements
         return updated;
     }
 
+    private void updateExpectedHeight() {
+        mMaxTranslation = 0;
+        if (mCollapsed) {
+            return;
+        }
+        for (FloatingHeaderRow row : mAllRows) {
+            mMaxTranslation += row.getExpectedHeight();
+        }
+    }
+
     public void setMainActive(boolean active) {
         mCurrentRV = active ? mMainRV : mWorkRV;
         mMainRVActive = active;
@@ -208,12 +267,21 @@ public class FloatingHeaderView extends LinearLayout implements
         }
     }
 
-    protected void applyScroll(int uncappedY, int currentY) { }
-
-    protected void apply() {
+    protected void applyVerticalMove() {
         int uncappedTranslationY = mTranslationY;
         mTranslationY = Math.max(mTranslationY, -mMaxTranslation);
-        applyScroll(uncappedTranslationY, mTranslationY);
+
+        if (mCollapsed || uncappedTranslationY < mTranslationY - mHeaderTopPadding) {
+            // we hide it completely if already capped (for opening search anim)
+            for (FloatingHeaderRow row : mAllRows) {
+                row.setVerticalScroll(0, true /* isScrolledOut */);
+            }
+        } else {
+            for (FloatingHeaderRow row : mAllRows) {
+                row.setVerticalScroll(uncappedTranslationY, false /* isScrolledOut */);
+            }
+        }
+
         mTabLayout.setTranslationY(mTranslationY);
         mClip.top = mMaxTranslation + mTranslationY;
         // clipping on a draw might cause additional redraw
@@ -223,6 +291,16 @@ public class FloatingHeaderView extends LinearLayout implements
         }
     }
 
+    /**
+     * Hides all the floating rows
+     */
+    public void setCollapsed(boolean collapse) {
+        if (mCollapsed == collapse) return;
+
+        mCollapsed = collapse;
+        onHeightUpdated();
+    }
+
     public void reset(boolean animate) {
         if (mAnimator.isStarted()) {
             mAnimator.cancel();
@@ -234,7 +312,7 @@ public class FloatingHeaderView extends LinearLayout implements
             mAnimator.start();
         } else {
             mTranslationY = 0;
-            apply();
+            applyVerticalMove();
         }
         mHeaderCollapsed = false;
         mSnappedScrolledY = -mMaxTranslation;
@@ -248,7 +326,7 @@ public class FloatingHeaderView extends LinearLayout implements
     @Override
     public void onAnimationUpdate(ValueAnimator animation) {
         mTranslationY = (Integer) animation.getAnimatedValue();
-        apply();
+        applyVerticalMove();
     }
 
     @Override
@@ -287,8 +365,12 @@ public class FloatingHeaderView extends LinearLayout implements
 
     public void setContentVisibility(boolean hasHeader, boolean hasContent, PropertySetter setter,
             Interpolator fadeInterpolator) {
-        setter.setViewAlpha(this, hasContent ? 1 : 0, fadeInterpolator);
+        for (FloatingHeaderRow row : mAllRows) {
+            row.setContentVisibility(hasHeader, hasContent, setter, fadeInterpolator);
+        }
+
         allowTouchForwarding(hasContent);
+        setter.setFloat(mTabLayout, ALPHA, hasContent ? 1 : 0, fadeInterpolator);
     }
 
     protected void allowTouchForwarding(boolean allow) {
@@ -296,6 +378,11 @@ public class FloatingHeaderView extends LinearLayout implements
     }
 
     public boolean hasVisibleContent() {
+        for (FloatingHeaderRow row : mAllRows) {
+            if (row.hasVisibleContent()) {
+                return true;
+            }
+        }
         return false;
     }
 
@@ -303,6 +390,23 @@ public class FloatingHeaderView extends LinearLayout implements
     public boolean hasOverlappingRendering() {
         return false;
     }
+
+    @Override
+    public void setInsets(Rect insets) {
+        DeviceProfile grid = Launcher.getLauncher(getContext()).getDeviceProfile();
+        for (FloatingHeaderRow row : mAllRows) {
+            row.setInsets(insets, grid);
+        }
+    }
+
+    public <T extends FloatingHeaderRow> T findFixedRowByType(Class<T> type) {
+        for (FloatingHeaderRow row : mAllRows) {
+            if (row.getTypeClass() == type) {
+                return (T) row;
+            }
+        }
+        return null;
+    }
 }
 
 
diff --git a/src/com/android/launcher3/allapps/PluginHeaderRow.java b/src/com/android/launcher3/allapps/PluginHeaderRow.java
new file mode 100644
index 0000000000..b283ff4056
--- /dev/null
+++ b/src/com/android/launcher3/allapps/PluginHeaderRow.java
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2018 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.allapps;
+
+import static android.view.View.ALPHA;
+import static android.view.View.INVISIBLE;
+import static android.view.View.VISIBLE;
+
+import android.graphics.Rect;
+import android.view.View;
+import android.view.animation.Interpolator;
+
+import com.android.launcher3.DeviceProfile;
+import com.android.launcher3.anim.PropertySetter;
+import com.android.systemui.plugins.AllAppsRow;
+
+/**
+ * Wrapper over an {@link AllAppsRow} plugin with {@link FloatingHeaderRow} interface so that
+ * it can be easily added in {@link FloatingHeaderView}.
+ */
+public class PluginHeaderRow implements FloatingHeaderRow {
+
+    private final AllAppsRow mPlugin;
+    final View mView;
+
+    PluginHeaderRow(AllAppsRow plugin, FloatingHeaderView parent) {
+        mPlugin = plugin;
+        mView = mPlugin.setup(parent);
+    }
+
+    @Override
+    public void setup(FloatingHeaderView parent, FloatingHeaderRow[] allRows,
+            boolean tabsHidden) { }
+
+    @Override
+    public void setInsets(Rect insets, DeviceProfile grid) { }
+
+    @Override
+    public int getExpectedHeight() {
+        return mPlugin.getExpectedHeight();
+    }
+
+    @Override
+    public boolean shouldDraw() {
+        return true;
+    }
+
+    @Override
+    public boolean hasVisibleContent() {
+        return true;
+    }
+
+    @Override
+    public void setContentVisibility(boolean hasHeaderExtra, boolean hasContent,
+            PropertySetter setter, Interpolator fadeInterpolator) {
+        // Don't use setViewAlpha as we want to control the visibility ourselves.
+        setter.setFloat(mView, ALPHA, hasContent ? 1 : 0, fadeInterpolator);
+    }
+
+    @Override
+    public void setVerticalScroll(int scroll, boolean isScrolledOut) {
+        mView.setVisibility(isScrolledOut ? INVISIBLE : VISIBLE);
+        if (!isScrolledOut) {
+            mView.setTranslationY(scroll);
+        }
+    }
+
+    @Override
+    public Class<PluginHeaderRow> getTypeClass() {
+        return PluginHeaderRow.class;
+    }
+}
\ No newline at end of file
diff --git a/src/com/android/launcher3/dragndrop/FolderAdaptiveIcon.java b/src/com/android/launcher3/dragndrop/FolderAdaptiveIcon.java
index 9f0d678bf2..e40397bf31 100644
--- a/src/com/android/launcher3/dragndrop/FolderAdaptiveIcon.java
+++ b/src/com/android/launcher3/dragndrop/FolderAdaptiveIcon.java
@@ -36,7 +36,7 @@ import com.android.launcher3.MainThreadExecutor;
 import com.android.launcher3.R;
 import com.android.launcher3.folder.FolderIcon;
 import com.android.launcher3.folder.PreviewBackground;
-import com.android.launcher3.graphics.BitmapRenderer;
+import com.android.launcher3.icons.BitmapRenderer;
 import com.android.launcher3.util.Preconditions;
 
 /**
diff --git a/src/com/android/launcher3/graphics/DragPreviewProvider.java b/src/com/android/launcher3/graphics/DragPreviewProvider.java
index 5094280f6a..75d3425e2b 100644
--- a/src/com/android/launcher3/graphics/DragPreviewProvider.java
+++ b/src/com/android/launcher3/graphics/DragPreviewProvider.java
@@ -33,6 +33,7 @@ import com.android.launcher3.Launcher;
 import com.android.launcher3.R;
 import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.folder.FolderIcon;
+import com.android.launcher3.icons.BitmapRenderer;
 import com.android.launcher3.util.UiThreadHelper;
 import com.android.launcher3.widget.LauncherAppWidgetHostView;
 
diff --git a/src/com/android/launcher3/graphics/ShadowDrawable.java b/src/com/android/launcher3/graphics/ShadowDrawable.java
index 19e2768ccb..f10b972590 100644
--- a/src/com/android/launcher3/graphics/ShadowDrawable.java
+++ b/src/com/android/launcher3/graphics/ShadowDrawable.java
@@ -32,6 +32,7 @@ import android.os.Build;
 import android.util.AttributeSet;
 
 import com.android.launcher3.R;
+import com.android.launcher3.icons.BitmapRenderer;
 
 import org.xmlpull.v1.XmlPullParser;
 import org.xmlpull.v1.XmlPullParserException;
diff --git a/src/com/android/launcher3/icons/BaseIconCache.java b/src/com/android/launcher3/icons/BaseIconCache.java
index 1f810b39f1..61c8ccc402 100644
--- a/src/com/android/launcher3/icons/BaseIconCache.java
+++ b/src/com/android/launcher3/icons/BaseIconCache.java
@@ -36,19 +36,14 @@ import android.graphics.drawable.Drawable;
 import android.os.Build;
 import android.os.Build.VERSION;
 import android.os.Handler;
+import android.os.Looper;
 import android.os.Process;
 import android.os.UserHandle;
 import android.text.TextUtils;
 import android.util.Log;
 
 import com.android.launcher3.IconProvider;
-import com.android.launcher3.LauncherFiles;
-import com.android.launcher3.LauncherModel;
-import com.android.launcher3.Utilities;
-import com.android.launcher3.compat.UserManagerCompat;
-import com.android.launcher3.graphics.BitmapRenderer;
 import com.android.launcher3.util.ComponentKey;
-import com.android.launcher3.util.InstantAppResolver;
 import com.android.launcher3.util.Preconditions;
 import com.android.launcher3.util.Provider;
 import com.android.launcher3.util.SQLiteCacheHelper;
@@ -58,11 +53,10 @@ import java.util.HashSet;
 
 import androidx.annotation.NonNull;
 
-public class BaseIconCache {
+public abstract class BaseIconCache {
 
     private static final String TAG = "BaseIconCache";
     private static final boolean DEBUG = false;
-    private static final boolean DEBUG_IGNORE_CACHE = false;
 
     private static final int INITIAL_ICON_CACHE_CAPACITY = 50;
 
@@ -76,29 +70,30 @@ public class BaseIconCache {
 
     private final HashMap<UserHandle, BitmapInfo> mDefaultIcons = new HashMap<>();
 
-    final Context mContext;
-    final PackageManager mPackageManager;
-    final IconProvider mIconProvider;
-    final UserManagerCompat mUserManager;
+    protected final Context mContext;
+    protected final PackageManager mPackageManager;
+    protected final IconProvider mIconProvider;
 
     private final HashMap<ComponentKey, CacheEntry> mCache =
             new HashMap<>(INITIAL_ICON_CACHE_CAPACITY);
-    private final InstantAppResolver mInstantAppResolver;
-    final Handler mWorkerHandler;
+    protected final Handler mWorkerHandler;
 
-    int mIconDpi;
+    protected int mIconDpi;
     IconDB mIconDb;
 
+    private final String mDbFileName;
     private final BitmapFactory.Options mDecodeOptions;
+    private final Looper mBgLooper;
 
-    public BaseIconCache(Context context, int iconDpi, int iconPixelSize) {
+    public BaseIconCache(Context context, String dbFileName, Looper bgLooper,
+            int iconDpi, int iconPixelSize) {
         mContext = context;
+        mDbFileName = dbFileName;
         mPackageManager = context.getPackageManager();
-        mUserManager = UserManagerCompat.getInstance(mContext);
-        mInstantAppResolver = InstantAppResolver.newInstance(mContext);
+        mBgLooper = bgLooper;
 
         mIconProvider = IconProvider.newInstance(context);
-        mWorkerHandler = new Handler(LauncherModel.getWorkerLooper());
+        mWorkerHandler = new Handler(mBgLooper);
 
         if (BitmapRenderer.USE_HARDWARE_BITMAP && Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
             mDecodeOptions = new BitmapFactory.Options();
@@ -108,9 +103,21 @@ public class BaseIconCache {
         }
 
         mIconDpi = iconDpi;
-        mIconDb = new IconDB(context, iconPixelSize);
+        mIconDb = new IconDB(context, dbFileName, iconPixelSize);
     }
 
+    /**
+     * Returns the persistable serial number for {@param user}. Subclass should implement proper
+     * caching strategy to avoid making binder call every time.
+     */
+    protected abstract long getSerialNumberForUser(UserHandle user);
+
+    /**
+     * Return true if the given app is an instant app and should be badged appropriately.
+     */
+    protected abstract boolean isInstantApp(ApplicationInfo info);
+
+
     public void updateIconParams(int iconDpi, int iconPixelSize) {
         mWorkerHandler.post(() -> updateIconParamsBg(iconDpi, iconPixelSize));
     }
@@ -120,13 +127,14 @@ public class BaseIconCache {
         mDefaultIcons.clear();
 
         mIconDb.close();
-        mIconDb = new IconDB(mContext, iconPixelSize);
+        mIconDb = new IconDB(mContext, mDbFileName, iconPixelSize);
         mCache.clear();
     }
 
     private Drawable getFullResDefaultActivityIcon() {
-        return Resources.getSystem().getDrawableForDensity(Utilities.ATLEAST_OREO
-                ? android.R.drawable.sym_def_app_icon : android.R.mipmap.sym_def_app_icon,
+        return Resources.getSystem().getDrawableForDensity(
+                Build.VERSION.SDK_INT >= Build.VERSION_CODES.O
+                        ? android.R.drawable.sym_def_app_icon : android.R.mipmap.sym_def_app_icon,
                 mIconDpi);
     }
 
@@ -189,7 +197,7 @@ public class BaseIconCache {
      */
     public synchronized void removeIconsForPkg(String packageName, UserHandle user) {
         removeFromMemCacheLocked(packageName, user);
-        long userSerial = mUserManager.getSerialNumberForUser(user);
+        long userSerial = getSerialNumberForUser(user);
         mIconDb.delete(
                 IconDB.COLUMN_COMPONENT + " LIKE ? AND " + IconDB.COLUMN_USER + " = ?",
                 new String[]{packageName + "/%", Long.toString(userSerial)});
@@ -287,7 +295,7 @@ public class BaseIconCache {
             T object = null;
             boolean providerFetchedOnce = false;
 
-            if (!getEntryFromDB(cacheKey, entry, useLowResIcon) || DEBUG_IGNORE_CACHE) {
+            if (!getEntryFromDB(cacheKey, entry, useLowResIcon)) {
                 object = infoProvider.get();
                 providerFetchedOnce = true;
 
@@ -395,7 +403,7 @@ public class BaseIconCache {
                     // only keep the low resolution icon instead of the larger full-sized icon
                     BitmapInfo iconInfo = li.createBadgedIconBitmap(
                             appInfo.loadIcon(mPackageManager), user, appInfo.targetSdkVersion,
-                            mInstantAppResolver.isInstantApp(appInfo));
+                            isInstantApp(appInfo));
                     li.recycle();
 
                     entry.title = appInfo.loadLabel(mPackageManager);
@@ -407,8 +415,7 @@ public class BaseIconCache {
                     // package updates.
                     ContentValues values = newContentValues(
                             iconInfo, entry.title.toString(), packageName);
-                    addIconToDB(values, cacheKey.componentName, info,
-                            mUserManager.getSerialNumberForUser(user));
+                    addIconToDB(values, cacheKey.componentName, info, getSerialNumberForUser(user));
 
                 } catch (NameNotFoundException e) {
                     if (DEBUG) Log.d(TAG, "Application not installed " + packageName);
@@ -432,7 +439,7 @@ public class BaseIconCache {
                     IconDB.COLUMN_COMPONENT + " = ? AND " + IconDB.COLUMN_USER + " = ?",
                     new String[]{
                             cacheKey.componentName.flattenToString(),
-                            Long.toString(mUserManager.getSerialNumberForUser(cacheKey.user))});
+                            Long.toString(getSerialNumberForUser(cacheKey.user))});
             if (c.moveToNext()) {
                 // Set the alpha to be 255, so that we never have a wrong color
                 entry.color = setColorAlphaBound(c.getInt(0), 255);
@@ -485,10 +492,8 @@ public class BaseIconCache {
         public final static String[] COLUMNS_LOW_RES = new String[] {
                 IconDB.COLUMN_ICON_COLOR, IconDB.COLUMN_LABEL };
 
-        public IconDB(Context context, int iconPixelSize) {
-            super(context, LauncherFiles.APP_ICONS_DB,
-                    (RELEASE_VERSION << 16) + iconPixelSize,
-                    TABLE_NAME);
+        public IconDB(Context context, String dbFileName, int iconPixelSize) {
+            super(context, dbFileName, (RELEASE_VERSION << 16) + iconPixelSize, TABLE_NAME);
         }
 
         @Override
@@ -510,7 +515,7 @@ public class BaseIconCache {
     private ContentValues newContentValues(BitmapInfo bitmapInfo, String label, String packageName) {
         ContentValues values = new ContentValues();
         values.put(IconDB.COLUMN_ICON,
-                bitmapInfo.isLowRes() ? null : Utilities.flattenBitmap(bitmapInfo.icon));
+                bitmapInfo.isLowRes() ? null : GraphicsUtils.flattenBitmap(bitmapInfo.icon));
         values.put(IconDB.COLUMN_ICON_COLOR, bitmapInfo.color);
 
         values.put(IconDB.COLUMN_LABEL, label);
diff --git a/src/com/android/launcher3/icons/IconCache.java b/src/com/android/launcher3/icons/IconCache.java
index e10ff5b1b8..7b318048af 100644
--- a/src/com/android/launcher3/icons/IconCache.java
+++ b/src/com/android/launcher3/icons/IconCache.java
@@ -18,6 +18,7 @@ package com.android.launcher3.icons;
 
 import android.content.Context;
 import android.content.Intent;
+import android.content.pm.ApplicationInfo;
 import android.content.pm.LauncherActivityInfo;
 import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
@@ -31,13 +32,16 @@ import android.util.Log;
 import com.android.launcher3.AppInfo;
 import com.android.launcher3.InvariantDeviceProfile;
 import com.android.launcher3.ItemInfoWithIcon;
+import com.android.launcher3.LauncherFiles;
 import com.android.launcher3.LauncherModel;
 import com.android.launcher3.MainThreadExecutor;
 import com.android.launcher3.ShortcutInfo;
 import com.android.launcher3.Utilities;
 import com.android.launcher3.compat.LauncherAppsCompat;
+import com.android.launcher3.compat.UserManagerCompat;
 import com.android.launcher3.icons.ComponentWithLabel.ComponentCachingLogic;
 import com.android.launcher3.model.PackageItemInfo;
+import com.android.launcher3.util.InstantAppResolver;
 import com.android.launcher3.util.Preconditions;
 import com.android.launcher3.util.Provider;
 
@@ -56,15 +60,29 @@ public class IconCache extends BaseIconCache {
     private final CachingLogic<LauncherActivityInfo> mLauncherActivityInfoCachingLogic;
 
     private final LauncherAppsCompat mLauncherApps;
+    private final UserManagerCompat mUserManager;
+    private final InstantAppResolver mInstantAppResolver;
 
     private int mPendingIconRequestCount = 0;
 
     public IconCache(Context context, InvariantDeviceProfile inv) {
-        super(context, inv.fillResIconDpi, inv.iconBitmapSize);
+        super(context, LauncherFiles.APP_ICONS_DB, LauncherModel.getWorkerLooper(),
+                inv.fillResIconDpi, inv.iconBitmapSize);
         mComponentWithLabelCachingLogic = new ComponentCachingLogic(context);
         mLauncherActivityInfoCachingLogic = new LauncherActivtiyCachingLogic(this);
         mLauncherApps = LauncherAppsCompat.getInstance(mContext);
+        mUserManager = UserManagerCompat.getInstance(mContext);
+        mInstantAppResolver = InstantAppResolver.newInstance(mContext);
+    }
 
+    @Override
+    protected long getSerialNumberForUser(UserHandle user) {
+        return mUserManager.getSerialNumberForUser(user);
+    }
+
+    @Override
+    protected boolean isInstantApp(ApplicationInfo info) {
+        return mInstantAppResolver.isInstantApp(info);
     }
 
     /**
diff --git a/src/com/android/launcher3/icons/IconCacheUpdateHandler.java b/src/com/android/launcher3/icons/IconCacheUpdateHandler.java
index 07451b9504..0c601b96d4 100644
--- a/src/com/android/launcher3/icons/IconCacheUpdateHandler.java
+++ b/src/com/android/launcher3/icons/IconCacheUpdateHandler.java
@@ -27,11 +27,8 @@ import android.text.TextUtils;
 import android.util.Log;
 import android.util.SparseBooleanArray;
 
-import com.android.launcher3.Utilities;
 import com.android.launcher3.icons.BaseIconCache.IconDB;
-import com.android.launcher3.util.IntArray;
 
-import java.util.ArrayList;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.HashSet;
@@ -131,7 +128,7 @@ public class IconCacheUpdateHandler {
         if (ignorePackages == null) {
             ignorePackages = Collections.emptySet();
         }
-        long userSerial = mIconCache.mUserManager.getSerialNumberForUser(user);
+        long userSerial = mIconCache.getSerialNumberForUser(user);
 
         Stack<T> appsToUpdate = new Stack<>();
 
@@ -204,18 +201,31 @@ public class IconCacheUpdateHandler {
         }
     }
 
+    /**
+     * Commits all updates as part of the update handler to disk. Not more calls should be made
+     * to this class after this.
+     */
     public void finish() {
         // Commit all deletes
-        IntArray deleteIds = new IntArray();
+        int deleteCount = 0;
+        StringBuilder queryBuilder = new StringBuilder()
+                .append(IconDB.COLUMN_ROWID)
+                .append(" IN (");
+
         int count = mItemsToDelete.size();
         for (int i = 0;  i < count; i++) {
             if (mItemsToDelete.valueAt(i)) {
-                deleteIds.add(mItemsToDelete.keyAt(i));
+                if (deleteCount > 0) {
+                    queryBuilder.append(", ");
+                }
+                queryBuilder.append(mItemsToDelete.keyAt(i));
+                deleteCount++;
             }
         }
-        if (!deleteIds.isEmpty()) {
-            mIconCache.mIconDb.delete(
-                    Utilities.createDbSelectionQuery(IconDB.COLUMN_ROWID, deleteIds), null);
+        queryBuilder.append(')');
+
+        if (deleteCount > 0) {
+            mIconCache.mIconDb.delete(queryBuilder.toString(), null);
         }
     }
 
diff --git a/src/com/android/launcher3/icons/LauncherIcons.java b/src/com/android/launcher3/icons/LauncherIcons.java
index c96d35db56..0cf1a72585 100644
--- a/src/com/android/launcher3/icons/LauncherIcons.java
+++ b/src/com/android/launcher3/icons/LauncherIcons.java
@@ -31,7 +31,6 @@ import com.android.launcher3.InvariantDeviceProfile;
 import com.android.launcher3.ItemInfoWithIcon;
 import com.android.launcher3.LauncherAppState;
 import com.android.launcher3.Utilities;
-import com.android.launcher3.graphics.BitmapRenderer;
 import com.android.launcher3.model.PackageItemInfo;
 import com.android.launcher3.shortcuts.DeepShortcutManager;
 import com.android.launcher3.shortcuts.ShortcutInfoCompat;
diff --git a/src/com/android/launcher3/util/ContentWriter.java b/src/com/android/launcher3/util/ContentWriter.java
index 4384328912..00adf1069a 100644
--- a/src/com/android/launcher3/util/ContentWriter.java
+++ b/src/com/android/launcher3/util/ContentWriter.java
@@ -25,8 +25,8 @@ import android.os.UserHandle;
 
 import com.android.launcher3.LauncherAppState;
 import com.android.launcher3.LauncherSettings;
-import com.android.launcher3.Utilities;
 import com.android.launcher3.compat.UserManagerCompat;
+import com.android.launcher3.icons.GraphicsUtils;
 
 /**
  * A wrapper around {@link ContentValues} with some utility methods.
@@ -97,7 +97,7 @@ public class ContentWriter {
         Preconditions.assertNonUiThread();
         if (mIcon != null && !LauncherAppState.getInstance(context).getIconCache()
                 .isDefaultIcon(mIcon, mUser)) {
-            mValues.put(LauncherSettings.Favorites.ICON, Utilities.flattenBitmap(mIcon));
+            mValues.put(LauncherSettings.Favorites.ICON, GraphicsUtils.flattenBitmap(mIcon));
             mIcon = null;
         }
         return mValues;
diff --git a/tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java b/tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java
index 67106f7eac..bd1c657d25 100644
--- a/tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java
+++ b/tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java
@@ -177,7 +177,7 @@ public final class LauncherInstrumentation {
 
         switch (containerType) {
             case WORKSPACE: {
-                waitUntilGone(APPS_RES_ID);
+                waitForLauncherObject(APPS_RES_ID);
                 waitUntilGone(OVERVIEW_RES_ID);
                 waitUntilGone(WIDGETS_RES_ID);
                 return waitForLauncherObject(WORKSPACE_RES_ID);