diff --git a/res/layout/zzz_dummy_widget.xml b/res/layout/zzz_dummy_widget.xml
deleted file mode 100644
index a0fa8fc..0000000
--- a/res/layout/zzz_dummy_widget.xml
+++ /dev/null
@@ -1,35 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Copyright (C) 2014 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.
--->
-
-<LinearLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    android:orientation="horizontal">
-
-    <FrameLayout
-        android:layout_width="0dp"
-        android:layout_height="match_parent"
-        android:layout_weight="1"
-        android:background="#ffff0000" />
-
-    <FrameLayout
-        android:layout_width="0dp"
-        android:layout_height="match_parent"
-        android:layout_weight="1"
-        android:background="#ff00ff00" />
-
-</LinearLayout>
\ No newline at end of file
diff --git a/res/values/attrs.xml b/res/values/attrs.xml
index 68b628f..34385b0 100644
--- a/res/values/attrs.xml
+++ b/res/values/attrs.xml
@@ -143,4 +143,19 @@
     <declare-styleable name="RecyclerViewFastScroller">
         <attr name="canThumbDetach" format="boolean" />
     </declare-styleable>
+
+    <declare-styleable name="CustomAppWidgetProviderInfo">
+        <attr name="providerId" format="integer" />
+
+        <attr name="android:label" />
+        <attr name="android:initialLayout" />
+        <attr name="android:icon" />
+        <attr name="android:previewImage" />
+        <attr name="android:resizeMode" />
+
+        <attr name="numRows" />
+        <attr name="numColumns" />
+        <attr name="numMinRows" format="integer" />
+        <attr name="numMinColumns" format="integer" />
+    </declare-styleable>
 </resources>
diff --git a/res/values/dimens.xml b/res/values/dimens.xml
index b1f9d63..b403fbd 100644
--- a/res/values/dimens.xml
+++ b/res/values/dimens.xml
@@ -54,7 +54,6 @@
     <dimen name="vert_drop_target_horizontal_gap">14dp</dimen>
 
 <!-- App Widget resize frame -->
-    <dimen name="default_widget_padding">8dp</dimen>
     <dimen name="widget_handle_margin">13dp</dimen>
     <dimen name="resize_frame_background_padding">24dp</dimen>
 
diff --git a/res/xml/custom_widgets.xml b/res/xml/custom_widgets.xml
new file mode 100644
index 0000000..4b54386
--- /dev/null
+++ b/res/xml/custom_widgets.xml
@@ -0,0 +1,31 @@
+<?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.
+-->
+
+<widgets>
+    <!-- Sample widget definition
+        <widget
+            android:label="My custom widget"
+            android:initialLayout="@layout/sample_widget_layout"
+            android:icon="@drawable/ic_launcher_home"
+            android:resizeMode="horizontal|vertical"
+            launcher:numRows="2"
+            launcher:numColumns="3"
+            launcher:numMinRows="1"
+            launcher:numMinColumns="2"
+            launcher:providerId="1" />
+    -->
+</widgets>
\ No newline at end of file
diff --git a/src/com/android/launcher3/AppWidgetResizeFrame.java b/src/com/android/launcher3/AppWidgetResizeFrame.java
index a486a3a..d0b1c30 100644
--- a/src/com/android/launcher3/AppWidgetResizeFrame.java
+++ b/src/com/android/launcher3/AppWidgetResizeFrame.java
@@ -8,7 +8,6 @@
 import android.appwidget.AppWidgetHostView;
 import android.appwidget.AppWidgetProviderInfo;
 import android.content.Context;
-import android.content.res.Resources;
 import android.graphics.Point;
 import android.graphics.Rect;
 import android.util.AttributeSet;
@@ -126,14 +125,8 @@
         mMinHSpan = info.minSpanX;
         mMinVSpan = info.minSpanY;
 
-        if (!info.isCustomWidget) {
-            mWidgetPadding = AppWidgetHostView.getDefaultPaddingForWidget(getContext(),
-                    widgetView.getAppWidgetInfo().provider, null);
-        } else {
-            Resources r = getContext().getResources();
-            int padding = r.getDimensionPixelSize(R.dimen.default_widget_padding);
-            mWidgetPadding = new Rect(padding, padding, padding, padding);
-        }
+        mWidgetPadding = AppWidgetHostView.getDefaultPaddingForWidget(getContext(),
+                widgetView.getAppWidgetInfo().provider, null);
 
         if (mResizeMode == AppWidgetProviderInfo.RESIZE_HORIZONTAL) {
             mDragHandles[INDEX_TOP].setVisibility(GONE);
diff --git a/src/com/android/launcher3/CustomAppWidget.java b/src/com/android/launcher3/CustomAppWidget.java
deleted file mode 100644
index 1b4ed79..0000000
--- a/src/com/android/launcher3/CustomAppWidget.java
+++ /dev/null
@@ -1,14 +0,0 @@
-package com.android.launcher3;
-
-public interface CustomAppWidget {
-    public String getLabel();
-    public int getPreviewImage();
-    public int getIcon();
-    public int getWidgetLayout();
-
-    public int getSpanX();
-    public int getSpanY();
-    public int getMinSpanX();
-    public int getMinSpanY();
-    public int getResizeMode();
-}
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 8d9c29f..76f5cda 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -136,6 +136,7 @@
 import com.android.launcher3.widget.WidgetAddFlowHandler;
 import com.android.launcher3.widget.WidgetHostViewLoader;
 import com.android.launcher3.widget.WidgetsContainerView;
+import com.android.launcher3.widget.custom.CustomWidgetParser;
 
 import java.io.FileDescriptor;
 import java.io.PrintWriter;
@@ -296,15 +297,6 @@
     // the press state and keep this reference to reset the press state when we return to launcher.
     private BubbleTextView mWaitingForResume;
 
-    protected static final HashMap<String, CustomAppWidget> sCustomAppWidgets =
-        new HashMap<>();
-
-    static {
-        if (TestingUtils.ENABLE_CUSTOM_WIDGET_TEST) {
-            TestingUtils.addDummyWidget(sCustomAppWidgets);
-        }
-    }
-
     // Exiting spring loaded mode happens with a delay. This runnable object triggers the
     // state transition. If another state transition happened during this delay,
     // simply unregister this runnable.
@@ -1408,17 +1400,13 @@
             appWidgetInfo = mAppWidgetManager.getLauncherAppWidgetInfo(appWidgetId);
         }
 
-        if (appWidgetInfo.isCustomWidget) {
-            appWidgetId = LauncherAppWidgetInfo.CUSTOM_WIDGET_ID;
-        }
-
         LauncherAppWidgetInfo launcherInfo;
         launcherInfo = new LauncherAppWidgetInfo(appWidgetId, appWidgetInfo.provider);
         launcherInfo.spanX = itemInfo.spanX;
         launcherInfo.spanY = itemInfo.spanY;
         launcherInfo.minSpanX = itemInfo.minSpanX;
         launcherInfo.minSpanY = itemInfo.minSpanY;
-        launcherInfo.user = appWidgetInfo.getUser();
+        launcherInfo.user = appWidgetInfo.getProfile();
 
         getModelWriter().addItemToDatabase(launcherInfo,
                 itemInfo.container, itemInfo.screenId, itemInfo.cellX, itemInfo.cellY);
@@ -1968,7 +1956,7 @@
      */
     private void addAppWidgetFromDrop(PendingAddWidgetInfo info) {
         AppWidgetHostView hostView = info.boundWidget;
-        int appWidgetId;
+        final int appWidgetId;
         WidgetAddFlowHandler addFlowHandler = info.getHandler();
         if (hostView != null) {
             // In the case where we've prebound the widget, we remove it from the DragLayer
@@ -1985,7 +1973,13 @@
         } else {
             // In this case, we either need to start an activity to get permission to bind
             // the widget, or we need to start an activity to configure the widget, or both.
-            appWidgetId = getAppWidgetHost().allocateAppWidgetId();
+            if (FeatureFlags.ENABLE_CUSTOM_WIDGETS &&
+                    info.itemType == LauncherSettings.Favorites.ITEM_TYPE_CUSTOM_APPWIDGET) {
+                appWidgetId = CustomWidgetParser.getWidgetIdForCustomProvider(
+                        this, info.componentName);
+            } else {
+                appWidgetId = getAppWidgetHost().allocateAppWidgetId();
+            }
             Bundle options = info.bindOptions;
 
             boolean success = mAppWidgetManager.bindAppWidgetIdIfAllowed(
@@ -3192,7 +3186,8 @@
                             (FolderInfo) item);
                     break;
                 }
-                case LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET: {
+                case LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET:
+                case LauncherSettings.Favorites.ITEM_TYPE_CUSTOM_APPWIDGET: {
                     view = inflateAppWidget((LauncherAppWidgetInfo) item);
                     if (view == null) {
                         continue;
@@ -3882,14 +3877,6 @@
         return super.onKeyShortcut(keyCode, event);
     }
 
-    public static CustomAppWidget getCustomAppWidget(String name) {
-        return sCustomAppWidgets.get(name);
-    }
-
-    public static HashMap<String, CustomAppWidget> getCustomAppWidgets() {
-        return sCustomAppWidgets;
-    }
-
     public static Launcher getLauncher(Context context) {
         if (context instanceof Launcher) {
             return (Launcher) context;
diff --git a/src/com/android/launcher3/LauncherAppWidgetHost.java b/src/com/android/launcher3/LauncherAppWidgetHost.java
index 5573c5c..819f23f 100644
--- a/src/com/android/launcher3/LauncherAppWidgetHost.java
+++ b/src/com/android/launcher3/LauncherAppWidgetHost.java
@@ -116,7 +116,7 @@
 
     public AppWidgetHostView createView(Context context, int appWidgetId,
             LauncherAppWidgetProviderInfo appWidget) {
-        if (appWidget.isCustomWidget) {
+        if (appWidget.isCustomWidget()) {
             LauncherAppWidgetHostView lahv = new LauncherAppWidgetHostView(context);
             LayoutInflater inflater = (LayoutInflater)
                     context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
diff --git a/src/com/android/launcher3/LauncherAppWidgetInfo.java b/src/com/android/launcher3/LauncherAppWidgetInfo.java
index 6f23e56..051846c 100644
--- a/src/com/android/launcher3/LauncherAppWidgetInfo.java
+++ b/src/com/android/launcher3/LauncherAppWidgetInfo.java
@@ -71,7 +71,7 @@
     /**
      * Indicates that this is a locally defined widget and hence has no system allocated id.
      */
-    static final int CUSTOM_WIDGET_ID = -100;
+    public static final int CUSTOM_WIDGET_ID = -100;
 
     /**
      * Identifier for this widget when talking with
@@ -104,15 +104,15 @@
     private boolean mHasNotifiedInitialWidgetSizeChanged;
 
     public LauncherAppWidgetInfo(int appWidgetId, ComponentName providerName) {
-        if (appWidgetId == CUSTOM_WIDGET_ID) {
+        this.appWidgetId = appWidgetId;
+        this.providerName = providerName;
+
+        if (isCustomWidget()) {
             itemType = LauncherSettings.Favorites.ITEM_TYPE_CUSTOM_APPWIDGET;
         } else {
             itemType = LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET;
         }
 
-        this.appWidgetId = appWidgetId;
-        this.providerName = providerName;
-
         // Since the widget isn't instantiated yet, we don't know these values. Set them to -1
         // to indicate that they should be calculated based on the layout and minWidth/minHeight
         spanX = -1;
@@ -128,7 +128,7 @@
     }
 
     public boolean isCustomWidget() {
-        return appWidgetId == CUSTOM_WIDGET_ID;
+        return appWidgetId <= CUSTOM_WIDGET_ID;
     }
 
     @Override
diff --git a/src/com/android/launcher3/LauncherAppWidgetProviderInfo.java b/src/com/android/launcher3/LauncherAppWidgetProviderInfo.java
index 6cb703b..c713992 100644
--- a/src/com/android/launcher3/LauncherAppWidgetProviderInfo.java
+++ b/src/com/android/launcher3/LauncherAppWidgetProviderInfo.java
@@ -2,15 +2,11 @@
 
 import android.appwidget.AppWidgetHostView;
 import android.appwidget.AppWidgetProviderInfo;
-import android.content.ComponentName;
 import android.content.Context;
 import android.content.pm.PackageManager;
 import android.graphics.Point;
 import android.graphics.Rect;
-import android.graphics.drawable.Drawable;
 import android.os.Parcel;
-import android.os.Process;
-import android.os.UserHandle;
 
 /**
  * This class is a thin wrapper around the framework AppWidgetProviderInfo class. This class affords
@@ -20,7 +16,7 @@
  */
 public class LauncherAppWidgetProviderInfo extends AppWidgetProviderInfo {
 
-    public boolean isCustomWidget = false;
+    public static final String CLS_CUSTOM_WIDGET_PREFIX = "#custom-widget-";
 
     public int spanX;
     public int spanY;
@@ -48,22 +44,12 @@
         return launcherInfo;
     }
 
-    private LauncherAppWidgetProviderInfo(Parcel in) {
+    protected LauncherAppWidgetProviderInfo() {}
+
+    protected LauncherAppWidgetProviderInfo(Parcel in) {
         super(in);
     }
 
-    public LauncherAppWidgetProviderInfo(Context context, CustomAppWidget widget) {
-        isCustomWidget = true;
-
-        provider = new ComponentName(context, widget.getClass().getName());
-        icon = widget.getIcon();
-        label = widget.getLabel();
-        previewImage = widget.getPreviewImage();
-        initialLayout = widget.getWidgetLayout();
-        resizeMode = widget.getResizeMode();
-        initSpans(context);
-    }
-
     public void initSpans(Context context) {
         InvariantDeviceProfile idp = LauncherAppState.getIDP(context);
 
@@ -97,34 +83,15 @@
     }
 
     public String getLabel(PackageManager packageManager) {
-        if (isCustomWidget) {
-            return Utilities.trim(label);
-        }
         return super.loadLabel(packageManager);
     }
 
-    public Drawable getIcon(Context context, IconCache cache) {
-        if (isCustomWidget) {
-            return cache.getFullResIcon(provider.getPackageName(), icon);
-        }
-        return super.loadIcon(context, LauncherAppState.getIDP(context).fillResIconDpi);
+    public Point getMinSpans() {
+        return new Point((resizeMode & RESIZE_HORIZONTAL) != 0 ? minSpanX : -1,
+                (resizeMode & RESIZE_VERTICAL) != 0 ? minSpanY : -1);
     }
 
-    public String toString(PackageManager pm) {
-        if (isCustomWidget) {
-            return "WidgetProviderInfo(" + provider + ")";
-        }
-        return String.format("WidgetProviderInfo provider:%s package:%s short:%s label:%s",
-                provider.toString(), provider.getPackageName(), provider.getShortClassName(), getLabel(pm));
-    }
-
-    public Point getMinSpans(InvariantDeviceProfile idp, Context context) {
-        return new Point(
-                (resizeMode & RESIZE_HORIZONTAL) != 0 ? minSpanX : -1,
-                        (resizeMode & RESIZE_VERTICAL) != 0 ? minSpanY : -1);
-    }
-
-    public UserHandle getUser() {
-        return isCustomWidget ? Process.myUserHandle() : getProfile();
+    public boolean isCustomWidget() {
+        return provider.getClassName().startsWith(CLS_CUSTOM_WIDGET_PREFIX);
     }
  }
diff --git a/src/com/android/launcher3/WidgetPreviewLoader.java b/src/com/android/launcher3/WidgetPreviewLoader.java
index a65ea9b..f150c89 100644
--- a/src/com/android/launcher3/WidgetPreviewLoader.java
+++ b/src/com/android/launcher3/WidgetPreviewLoader.java
@@ -22,7 +22,6 @@
 import android.graphics.RectF;
 import android.graphics.drawable.Drawable;
 import android.os.AsyncTask;
-import android.os.Build;
 import android.os.CancellationSignal;
 import android.os.Handler;
 import android.os.UserHandle;
@@ -412,7 +411,8 @@
 
             // Draw icon in the center.
             try {
-                Drawable icon = info.getIcon(launcher, mIconCache);
+                Drawable icon =
+                        mIconCache.getFullResIcon(info.provider.getPackageName(), info.icon);
                 if (icon != null) {
                     int appIconSize = launcher.getDeviceProfile().iconSizePx;
                     int iconSize = (int) Math.min(appIconSize * scale,
diff --git a/src/com/android/launcher3/Workspace.java b/src/com/android/launcher3/Workspace.java
index d7f7099..c432a53 100644
--- a/src/com/android/launcher3/Workspace.java
+++ b/src/com/android/launcher3/Workspace.java
@@ -3641,7 +3641,7 @@
                         .getInstance(mLauncher).findProvider(item.providerName, item.user);
             } else {
                 widgetInfo = AppWidgetManagerCompat.getInstance(mLauncher)
-                        .getAppWidgetInfo(item.appWidgetId);
+                        .getLauncherAppWidgetInfo(item.appWidgetId);
             }
 
             if (widgetInfo != null) {
diff --git a/src/com/android/launcher3/compat/AppWidgetManagerCompat.java b/src/com/android/launcher3/compat/AppWidgetManagerCompat.java
index a77a87f..fd1f0cc 100644
--- a/src/com/android/launcher3/compat/AppWidgetManagerCompat.java
+++ b/src/com/android/launcher3/compat/AppWidgetManagerCompat.java
@@ -24,10 +24,13 @@
 import android.os.UserHandle;
 import android.support.annotation.Nullable;
 
+import com.android.launcher3.LauncherAppWidgetInfo;
 import com.android.launcher3.LauncherAppWidgetProviderInfo;
 import com.android.launcher3.Utilities;
+import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.util.ComponentKey;
 import com.android.launcher3.util.PackageUserKey;
+import com.android.launcher3.widget.custom.CustomWidgetParser;
 
 import java.util.HashMap;
 import java.util.List;
@@ -58,12 +61,13 @@
         mAppWidgetManager = AppWidgetManager.getInstance(context);
     }
 
-    public AppWidgetProviderInfo getAppWidgetInfo(int appWidgetId) {
-        return mAppWidgetManager.getAppWidgetInfo(appWidgetId);
-    }
-
     public LauncherAppWidgetProviderInfo getLauncherAppWidgetInfo(int appWidgetId) {
-        AppWidgetProviderInfo info = getAppWidgetInfo(appWidgetId);
+        if (FeatureFlags.ENABLE_CUSTOM_WIDGETS
+                && appWidgetId <= LauncherAppWidgetInfo.CUSTOM_WIDGET_ID) {
+            return CustomWidgetParser.getWidgetProvider(mContext, appWidgetId);
+        }
+
+        AppWidgetProviderInfo info = mAppWidgetManager.getAppWidgetInfo(appWidgetId);
         return info == null ? null : LauncherAppWidgetProviderInfo.fromProviderInfo(mContext, info);
     }
 
diff --git a/src/com/android/launcher3/compat/AppWidgetManagerCompatVL.java b/src/com/android/launcher3/compat/AppWidgetManagerCompatVL.java
index cb3bd6c..8430285 100644
--- a/src/com/android/launcher3/compat/AppWidgetManagerCompatVL.java
+++ b/src/com/android/launcher3/compat/AppWidgetManagerCompatVL.java
@@ -20,14 +20,17 @@
 import android.content.ComponentName;
 import android.content.Context;
 import android.os.Bundle;
+import android.os.Process;
 import android.os.UserHandle;
 import android.os.UserManager;
 import android.support.annotation.Nullable;
 
+import com.android.launcher3.LauncherAppWidgetInfo;
 import com.android.launcher3.LauncherAppWidgetProviderInfo;
 import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.util.ComponentKey;
 import com.android.launcher3.util.PackageUserKey;
+import com.android.launcher3.widget.custom.CustomWidgetParser;
 
 import java.util.ArrayList;
 import java.util.Collections;
@@ -54,6 +57,10 @@
             for (UserHandle user : mUserManager.getUserProfiles()) {
                 providers.addAll(mAppWidgetManager.getInstalledProvidersForProfile(user));
             }
+
+            if (FeatureFlags.ENABLE_CUSTOM_WIDGETS) {
+                providers.addAll(CustomWidgetParser.getCustomWidgets(mContext));
+            }
             return providers;
         }
         // Only get providers for the given package/user.
@@ -65,6 +72,11 @@
                 iterator.remove();
             }
         }
+
+        if (FeatureFlags.ENABLE_CUSTOM_WIDGETS && Process.myUserHandle().equals(packageUser.mUser)
+                && mContext.getPackageName().equals(packageUser.mPackageName)) {
+            providers.addAll(CustomWidgetParser.getCustomWidgets(mContext));
+        }
         return providers;
     }
 
@@ -74,6 +86,11 @@
         if (FeatureFlags.GO_DISABLE_WIDGETS) {
             return false;
         }
+
+        if (FeatureFlags.ENABLE_CUSTOM_WIDGETS
+                && appWidgetId <= LauncherAppWidgetInfo.CUSTOM_WIDGET_ID) {
+            return true;
+        }
         return mAppWidgetManager.bindAppWidgetIdIfAllowed(
                 appWidgetId, info.getProfile(), info.provider, options);
     }
@@ -89,6 +106,15 @@
                 return LauncherAppWidgetProviderInfo.fromProviderInfo(mContext, info);
             }
         }
+
+        if (FeatureFlags.ENABLE_CUSTOM_WIDGETS && Process.myUserHandle().equals(user)) {
+            for (LauncherAppWidgetProviderInfo info :
+                    CustomWidgetParser.getCustomWidgets(mContext)) {
+                if (info.provider.equals(provider)) {
+                    return info;
+                }
+            }
+        }
         return null;
     }
 
@@ -104,6 +130,13 @@
                 result.put(new ComponentKey(info.provider, user), info);
             }
         }
+
+        if (FeatureFlags.ENABLE_CUSTOM_WIDGETS) {
+            for (LauncherAppWidgetProviderInfo info :
+                    CustomWidgetParser.getCustomWidgets(mContext)) {
+                result.put(new ComponentKey(info.provider, info.getProfile()), info);
+            }
+        }
         return result;
     }
 }
diff --git a/src/com/android/launcher3/config/BaseFlags.java b/src/com/android/launcher3/config/BaseFlags.java
index 5adeec1..5f6909c 100644
--- a/src/com/android/launcher3/config/BaseFlags.java
+++ b/src/com/android/launcher3/config/BaseFlags.java
@@ -61,6 +61,9 @@
     // When enabled, the qsb will be moved to the hotseat.
     public static final boolean QSB_IN_HOTSEAT = true;
 
+    // When true, custom widgets are loaded using CustomWidgetParser.
+    public static final boolean ENABLE_CUSTOM_WIDGETS = false;
+
     // Features to control Launcher3Go behavior
     public static final boolean GO_DISABLE_WIDGETS = false;
 }
diff --git a/src/com/android/launcher3/model/GridSizeMigrationTask.java b/src/com/android/launcher3/model/GridSizeMigrationTask.java
index 8de0de0..d9b1a3f 100644
--- a/src/com/android/launcher3/model/GridSizeMigrationTask.java
+++ b/src/com/android/launcher3/model/GridSizeMigrationTask.java
@@ -726,7 +726,7 @@
                                 mContext).getLauncherAppWidgetInfo(widgetId);
                         Point spans = null;
                         if (pInfo != null) {
-                            spans = pInfo.getMinSpans(mIdp, mContext);
+                            spans = pInfo.getMinSpans();
                         }
                         if (spans != null) {
                             entry.minSpanX = spans.x > 0 ? spans.x : entry.spanX;
diff --git a/src/com/android/launcher3/testing/DummyWidget.java b/src/com/android/launcher3/testing/DummyWidget.java
deleted file mode 100644
index df887ac..0000000
--- a/src/com/android/launcher3/testing/DummyWidget.java
+++ /dev/null
@@ -1,53 +0,0 @@
-package com.android.launcher3.testing;
-
-import android.appwidget.AppWidgetProviderInfo;
-
-import com.android.launcher3.CustomAppWidget;
-import com.android.launcher3.R;
-
-public class DummyWidget implements CustomAppWidget {
-    @Override
-    public String getLabel() {
-        return "Dumb Launcher Widget";
-    }
-
-    @Override
-    public int getPreviewImage() {
-        return 0;
-    }
-
-    @Override
-    public int getIcon() {
-        return 0;
-    }
-
-    @Override
-    public int getWidgetLayout() {
-        return R.layout.zzz_dummy_widget;
-    }
-
-    @Override
-    public int getSpanX() {
-        return 2;
-    }
-
-    @Override
-    public int getSpanY() {
-        return 2;
-    }
-
-    @Override
-    public int getMinSpanX() {
-        return 1;
-    }
-
-    @Override
-    public int getMinSpanY() {
-        return 1;
-    }
-
-    @Override
-    public int getResizeMode() {
-        return AppWidgetProviderInfo.RESIZE_BOTH;
-    }
-}
diff --git a/src/com/android/launcher3/util/TestingUtils.java b/src/com/android/launcher3/util/TestingUtils.java
index a7cc42b..d927dc3 100644
--- a/src/com/android/launcher3/util/TestingUtils.java
+++ b/src/com/android/launcher3/util/TestingUtils.java
@@ -3,18 +3,14 @@
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
-import android.util.Log;
 import android.view.Gravity;
 import android.view.View;
 import android.widget.FrameLayout;
 
-import com.android.launcher3.CustomAppWidget;
 import com.android.launcher3.Launcher;
 import com.android.launcher3.R;
 import com.android.launcher3.Utilities;
 
-import java.util.HashMap;
-
 public class TestingUtils {
 
     public static final String MEMORY_TRACKER = "com.android.launcher3.testing.MemoryTracker";
@@ -23,9 +19,6 @@
     public static final boolean MEMORY_DUMP_ENABLED = false;
     public static final String SHOW_WEIGHT_WATCHER = "debug.show_mem";
 
-    public static final boolean ENABLE_CUSTOM_WIDGET_TEST = false;
-    public static final String DUMMY_WIDGET = "com.android.launcher3.testing.DummyWidget";
-
     public static void startTrackingMemory(Context context) {
         if (MEMORY_DUMP_ENABLED) {
             context.startService(new Intent()
@@ -55,16 +48,4 @@
             launcher.mWeightWatcher = watcher;
         }
     }
-
-    public static void addDummyWidget(HashMap<String, CustomAppWidget> set) {
-        if (ENABLE_CUSTOM_WIDGET_TEST) {
-            try {
-                Class<?> clazz = Class.forName(DUMMY_WIDGET);
-                CustomAppWidget widget = (CustomAppWidget) clazz.newInstance();
-                set.put(widget.getClass().getName(), widget);
-            } catch (Exception e) {
-                Log.e("TestingUtils", "Error adding dummy widget", e);
-            }
-        }
-    }
 }
diff --git a/src/com/android/launcher3/widget/PendingAddWidgetInfo.java b/src/com/android/launcher3/widget/PendingAddWidgetInfo.java
index ad05ce9..bc40484 100644
--- a/src/com/android/launcher3/widget/PendingAddWidgetInfo.java
+++ b/src/com/android/launcher3/widget/PendingAddWidgetInfo.java
@@ -35,13 +35,13 @@
     public Bundle bindOptions = null;
 
     public PendingAddWidgetInfo(LauncherAppWidgetProviderInfo i) {
-        if (i.isCustomWidget) {
+        if (i.isCustomWidget()) {
             itemType = LauncherSettings.Favorites.ITEM_TYPE_CUSTOM_APPWIDGET;
         } else {
             itemType = LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET;
         }
         this.info = i;
-        user = i.getUser();
+        user = i.getProfile();
         componentName = i.provider;
         previewImage = i.previewImage;
         icon = i.icon;
diff --git a/src/com/android/launcher3/widget/WidgetHostViewLoader.java b/src/com/android/launcher3/widget/WidgetHostViewLoader.java
index 5eeea44..e6f8bb6 100644
--- a/src/com/android/launcher3/widget/WidgetHostViewLoader.java
+++ b/src/com/android/launcher3/widget/WidgetHostViewLoader.java
@@ -85,7 +85,7 @@
     private boolean preloadWidget() {
         final LauncherAppWidgetProviderInfo pInfo = mInfo.info;
 
-        if (pInfo.isCustomWidget) {
+        if (pInfo.isCustomWidget()) {
             return false;
         }
         final Bundle options = getDefaultOptionsForWidget(mLauncher, mInfo);
diff --git a/src/com/android/launcher3/widget/custom/CustomAppWidgetProviderInfo.java b/src/com/android/launcher3/widget/custom/CustomAppWidgetProviderInfo.java
new file mode 100644
index 0000000..1086987
--- /dev/null
+++ b/src/com/android/launcher3/widget/custom/CustomAppWidgetProviderInfo.java
@@ -0,0 +1,103 @@
+/*
+ * 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.
+ */
+
+package com.android.launcher3.widget.custom;
+
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.pm.PackageManager;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import com.android.launcher3.LauncherAppWidgetProviderInfo;
+import com.android.launcher3.Utilities;
+
+/**
+ * Custom app widget provider info that can be used as a widget, but provide extra functionality
+ * by allowing custom code and views.
+ */
+public class CustomAppWidgetProviderInfo extends LauncherAppWidgetProviderInfo
+        implements Parcelable {
+
+    public final int providerId;
+
+    protected CustomAppWidgetProviderInfo(Parcel parcel, boolean readSelf, int providerId) {
+        super(parcel);
+        if (readSelf) {
+            this.providerId = parcel.readInt();
+
+            provider = new ComponentName(parcel.readString(), CLS_CUSTOM_WIDGET_PREFIX + providerId);
+
+            label = parcel.readString();
+            initialLayout = parcel.readInt();
+            icon = parcel.readInt();
+            previewImage = parcel.readInt();
+
+            resizeMode = parcel.readInt();
+            spanX = parcel.readInt();
+            spanY = parcel.readInt();
+            minSpanX = parcel.readInt();
+            minSpanY = parcel.readInt();
+        } else {
+            this.providerId = providerId;
+        }
+    }
+
+    @Override
+    public void initSpans(Context context) { }
+
+    @Override
+    public String getLabel(PackageManager packageManager) {
+        return Utilities.trim(label);
+    }
+
+    @Override
+    public String toString() {
+        return "WidgetProviderInfo(" + provider + ")";
+    }
+
+    @Override
+    public void writeToParcel(Parcel out, int flags) {
+        super.writeToParcel(out, flags);
+        out.writeInt(providerId);
+        out.writeString(provider.getPackageName());
+
+        out.writeString(label);
+        out.writeInt(initialLayout);
+        out.writeInt(icon);
+        out.writeInt(previewImage);
+
+        out.writeInt(resizeMode);
+        out.writeInt(spanX);
+        out.writeInt(spanY);
+        out.writeInt(minSpanX);
+        out.writeInt(minSpanY);
+    }
+
+    public static final Parcelable.Creator<CustomAppWidgetProviderInfo> CREATOR
+            = new Parcelable.Creator<CustomAppWidgetProviderInfo>() {
+
+        @Override
+        public CustomAppWidgetProviderInfo createFromParcel(Parcel parcel) {
+            return new CustomAppWidgetProviderInfo(parcel, true, 0);
+        }
+
+        @Override
+        public CustomAppWidgetProviderInfo[] newArray(int size) {
+            return new CustomAppWidgetProviderInfo[size];
+        }
+    };
+}
diff --git a/src/com/android/launcher3/widget/custom/CustomWidgetParser.java b/src/com/android/launcher3/widget/custom/CustomWidgetParser.java
new file mode 100644
index 0000000..00720c4
--- /dev/null
+++ b/src/com/android/launcher3/widget/custom/CustomWidgetParser.java
@@ -0,0 +1,142 @@
+/*
+ * 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.
+ */
+package com.android.launcher3.widget.custom;
+
+import android.appwidget.AppWidgetManager;
+import android.appwidget.AppWidgetProviderInfo;
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.content.res.XmlResourceParser;
+import android.os.Parcel;
+import android.os.Process;
+import android.util.SparseArray;
+import android.util.Xml;
+
+import com.android.launcher3.LauncherAppWidgetInfo;
+import com.android.launcher3.LauncherAppWidgetProviderInfo;
+import com.android.launcher3.R;
+
+import org.xmlpull.v1.XmlPullParser;
+import org.xmlpull.v1.XmlPullParserException;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+import static com.android.launcher3.LauncherAppWidgetProviderInfo.CLS_CUSTOM_WIDGET_PREFIX;
+
+/**
+ * Utility class to parse {@ink CustomAppWidgetProviderInfo} definitions from xml
+ */
+public class CustomWidgetParser {
+
+    private static List<LauncherAppWidgetProviderInfo> sCustomWidgets;
+    private static SparseArray<ComponentName> sWidgetsIdMap;
+
+    public static List<LauncherAppWidgetProviderInfo> getCustomWidgets(Context context) {
+        if (sCustomWidgets == null) {
+            // Synchronization not needed as it it safe to load multiple times
+            parseCustomWidgets(context);
+        }
+
+        return sCustomWidgets;
+    }
+
+    public static int getWidgetIdForCustomProvider(Context context, ComponentName provider) {
+        if (sWidgetsIdMap == null) {
+            parseCustomWidgets(context);
+        }
+        int index = sWidgetsIdMap.indexOfValue(provider);
+        if (index >= 0) {
+            return LauncherAppWidgetInfo.CUSTOM_WIDGET_ID - sWidgetsIdMap.keyAt(index);
+        } else {
+            return AppWidgetManager.INVALID_APPWIDGET_ID;
+        }
+    }
+
+    public static LauncherAppWidgetProviderInfo getWidgetProvider(Context context, int widgetId) {
+        if (sWidgetsIdMap == null || sCustomWidgets == null) {
+            parseCustomWidgets(context);
+        }
+        ComponentName cn = sWidgetsIdMap.get(LauncherAppWidgetInfo.CUSTOM_WIDGET_ID - widgetId);
+        for (LauncherAppWidgetProviderInfo info : sCustomWidgets) {
+            if (info.provider.equals(cn)) {
+                return info;
+            }
+        }
+        return null;
+    }
+
+    private static void parseCustomWidgets(Context context) {
+        ArrayList<LauncherAppWidgetProviderInfo> widgets = new ArrayList<>();
+        SparseArray<ComponentName> idMap = new SparseArray<>();
+
+        List<AppWidgetProviderInfo> providers = AppWidgetManager.getInstance(context)
+                .getInstalledProvidersForProfile(Process.myUserHandle());
+        if (providers.isEmpty()) {
+            sCustomWidgets = widgets;
+            sWidgetsIdMap = idMap;
+            return;
+        }
+
+        Parcel parcel = Parcel.obtain();
+        providers.get(0).writeToParcel(parcel, 0);
+
+        try (XmlResourceParser parser = context.getResources().getXml(R.xml.custom_widgets)) {
+            final int depth = parser.getDepth();
+            int type;
+
+            while (((type = parser.next()) != XmlPullParser.END_TAG ||
+                    parser.getDepth() > depth) && type != XmlPullParser.END_DOCUMENT) {
+                if ((type == XmlPullParser.START_TAG) && "widget".equals(parser.getName())) {
+                    TypedArray a = context.obtainStyledAttributes(
+                            Xml.asAttributeSet(parser), R.styleable.CustomAppWidgetProviderInfo);
+
+                    parcel.setDataPosition(0);
+                    CustomAppWidgetProviderInfo info = newInfo(a, parcel, context);
+                    widgets.add(info);
+                    a.recycle();
+
+                    idMap.put(info.providerId, info.provider);
+                }
+            }
+        } catch (IOException | XmlPullParserException e) {
+            throw new RuntimeException(e);
+        }
+        parcel.recycle();
+        sCustomWidgets = widgets;
+        sWidgetsIdMap = idMap;
+    }
+
+    private static CustomAppWidgetProviderInfo newInfo(TypedArray a, Parcel parcel, Context context) {
+        int providerId = a.getInt(R.styleable.CustomAppWidgetProviderInfo_providerId, 0);
+        CustomAppWidgetProviderInfo info = new CustomAppWidgetProviderInfo(parcel, false, providerId);
+        info.provider = new ComponentName(context.getPackageName(), CLS_CUSTOM_WIDGET_PREFIX + providerId);
+
+        info.label = a.getString(R.styleable.CustomAppWidgetProviderInfo_android_label);
+        info.initialLayout = a.getResourceId(R.styleable.CustomAppWidgetProviderInfo_android_initialLayout, 0);
+        info.icon = a.getResourceId(R.styleable.CustomAppWidgetProviderInfo_android_icon, 0);
+        info.previewImage = a.getResourceId(R.styleable.CustomAppWidgetProviderInfo_android_previewImage, 0);
+        info.resizeMode = a.getInt(R.styleable.CustomAppWidgetProviderInfo_android_resizeMode, 0);
+
+        info.spanX = a.getInt(R.styleable.CustomAppWidgetProviderInfo_numColumns, 1);
+        info.spanY = a.getInt(R.styleable.CustomAppWidgetProviderInfo_numRows, 1);
+        info.minSpanX = a.getInt(R.styleable.CustomAppWidgetProviderInfo_numMinColumns, 1);
+        info.minSpanY = a.getInt(R.styleable.CustomAppWidgetProviderInfo_numMinRows, 1);
+        return info;
+    }
+}
diff --git a/tests/src/com/android/launcher3/ui/widget/BindWidgetTest.java b/tests/src/com/android/launcher3/ui/widget/BindWidgetTest.java
index d4d517a..87103d7 100644
--- a/tests/src/com/android/launcher3/ui/widget/BindWidgetTest.java
+++ b/tests/src/com/android/launcher3/ui/widget/BindWidgetTest.java
@@ -16,6 +16,7 @@
 package com.android.launcher3.ui.widget;
 
 import android.appwidget.AppWidgetHost;
+import android.appwidget.AppWidgetManager;
 import android.content.ComponentName;
 import android.content.ContentResolver;
 import android.content.ContentValues;
@@ -171,8 +172,9 @@
         // Widget has a valid Id now.
         assertEquals(0, mCursor.getInt(mCursor.getColumnIndex(LauncherSettings.Favorites.RESTORED))
                 & LauncherAppWidgetInfo.FLAG_ID_NOT_VALID);
-        assertNotNull(mWidgetManager.getAppWidgetInfo(mCursor.getInt(mCursor.getColumnIndex(
-                LauncherSettings.Favorites.APPWIDGET_ID))));
+        assertNotNull(AppWidgetManager.getInstance(mTargetContext)
+                .getAppWidgetInfo(mCursor.getInt(mCursor.getColumnIndex(
+                        LauncherSettings.Favorites.APPWIDGET_ID))));
     }
 
     @Test
@@ -297,7 +299,7 @@
         item.spanY = info.minSpanY;
         item.minSpanX = info.minSpanX;
         item.minSpanY = info.minSpanY;
-        item.user = info.getUser();
+        item.user = info.getProfile();
         item.cellX = 0;
         item.cellY = 1;
         item.container = LauncherSettings.Favorites.CONTAINER_DESKTOP;