diff --git a/CleanSpec.mk b/CleanSpec.mk
index f7bda94..489abd1 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -52,6 +52,7 @@
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/app/Launcher2.apk)
 $(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/APPS/Launcher2_intermediates)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/app/Launcher2.apk)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/priv-app/Launcher3QuickStep)
 
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/product/priv-app/Launcher3)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/product/priv-app/Launcher3Go)
diff --git a/MODULE_LICENSE_APACHE2 b/MODULE_LICENSE_APACHE2
deleted file mode 100644
index e69de29..0000000
--- a/MODULE_LICENSE_APACHE2
+++ /dev/null
diff --git a/go/res/values-v26/bools.xml b/go/res/values-v26/bools.xml
index cc4a7ba..1584734 100644
--- a/go/res/values-v26/bools.xml
+++ b/go/res/values-v26/bools.xml
@@ -17,5 +17,6 @@
 -->
 
 <resources>
-    <bool name="notification_badging_enabled">false</bool>
-</resources>
\ No newline at end of file
+    <bool name="notification_dots_enabled">false</bool>
+</resources>
+
diff --git a/iconloaderlib/src/com/android/launcher3/icons/cache/IconCacheUpdateHandler.java b/iconloaderlib/src/com/android/launcher3/icons/cache/IconCacheUpdateHandler.java
deleted file mode 100644
index 7b8070a..0000000
--- a/iconloaderlib/src/com/android/launcher3/icons/cache/IconCacheUpdateHandler.java
+++ /dev/null
@@ -1,317 +0,0 @@
-<<<<<<< HEAD   (cc6caf Merge "Let launcher to provide its own OverscrollPlugin" int)
-/*
- * 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.icons.cache;
-
-import android.content.ComponentName;
-import android.content.pm.ApplicationInfo;
-import android.content.pm.PackageInfo;
-import android.content.pm.PackageManager;
-import android.database.Cursor;
-import android.database.sqlite.SQLiteException;
-import android.os.SystemClock;
-import android.os.UserHandle;
-import android.text.TextUtils;
-import android.util.ArrayMap;
-import android.util.Log;
-import android.util.SparseBooleanArray;
-
-import com.android.launcher3.icons.cache.BaseIconCache.IconDB;
-
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Map.Entry;
-import java.util.Set;
-import java.util.Stack;
-
-/**
- * Utility class to handle updating the Icon cache
- */
-public class IconCacheUpdateHandler {
-
-    private static final String TAG = "IconCacheUpdateHandler";
-
-    /**
-     * In this mode, all invalid icons are marked as to-be-deleted in {@link #mItemsToDelete}.
-     * This mode is used for the first run.
-     */
-    private static final boolean MODE_SET_INVALID_ITEMS = true;
-
-    /**
-     * In this mode, any valid icon is removed from {@link #mItemsToDelete}. This is used for all
-     * subsequent runs, which essentially acts as set-union of all valid items.
-     */
-    private static final boolean MODE_CLEAR_VALID_ITEMS = false;
-
-    private static final Object ICON_UPDATE_TOKEN = new Object();
-
-    private final HashMap<String, PackageInfo> mPkgInfoMap;
-    private final BaseIconCache mIconCache;
-
-    private final ArrayMap<UserHandle, Set<String>> mPackagesToIgnore = new ArrayMap<>();
-
-    private final SparseBooleanArray mItemsToDelete = new SparseBooleanArray();
-    private boolean mFilterMode = MODE_SET_INVALID_ITEMS;
-
-    IconCacheUpdateHandler(BaseIconCache cache) {
-        mIconCache = cache;
-
-        mPkgInfoMap = new HashMap<>();
-
-        // Remove all active icon update tasks.
-        mIconCache.mWorkerHandler.removeCallbacksAndMessages(ICON_UPDATE_TOKEN);
-
-        createPackageInfoMap();
-    }
-
-    /**
-     * Sets a package to ignore for processing
-     */
-    public void addPackagesToIgnore(UserHandle userHandle, String packageName) {
-        Set<String> packages = mPackagesToIgnore.get(userHandle);
-        if (packages == null) {
-            packages = new HashSet<>();
-            mPackagesToIgnore.put(userHandle, packages);
-        }
-        packages.add(packageName);
-    }
-
-    private void createPackageInfoMap() {
-        PackageManager pm = mIconCache.mPackageManager;
-        for (PackageInfo info :
-                pm.getInstalledPackages(PackageManager.MATCH_UNINSTALLED_PACKAGES)) {
-            mPkgInfoMap.put(info.packageName, info);
-        }
-    }
-
-    /**
-     * Updates the persistent DB, such that only entries corresponding to {@param apps} remain in
-     * the DB and are updated.
-     * @return The set of packages for which icons have updated.
-     */
-    public <T> void updateIcons(List<T> apps, CachingLogic<T> cachingLogic,
-            OnUpdateCallback onUpdateCallback) {
-        // Filter the list per user
-        HashMap<UserHandle, HashMap<ComponentName, T>> userComponentMap = new HashMap<>();
-        int count = apps.size();
-        for (int i = 0; i < count; i++) {
-            T app = apps.get(i);
-            UserHandle userHandle = cachingLogic.getUser(app);
-            HashMap<ComponentName, T> componentMap = userComponentMap.get(userHandle);
-            if (componentMap == null) {
-                componentMap = new HashMap<>();
-                userComponentMap.put(userHandle, componentMap);
-            }
-            componentMap.put(cachingLogic.getComponent(app), app);
-        }
-
-        for (Entry<UserHandle, HashMap<ComponentName, T>> entry : userComponentMap.entrySet()) {
-            updateIconsPerUser(entry.getKey(), entry.getValue(), cachingLogic, onUpdateCallback);
-        }
-
-        // From now on, clear every valid item from the global valid map.
-        mFilterMode = MODE_CLEAR_VALID_ITEMS;
-    }
-
-    /**
-     * Updates the persistent DB, such that only entries corresponding to {@param apps} remain in
-     * the DB and are updated.
-     * @return The set of packages for which icons have updated.
-     */
-    @SuppressWarnings("unchecked")
-    private <T> void updateIconsPerUser(UserHandle user, HashMap<ComponentName, T> componentMap,
-            CachingLogic<T> cachingLogic, OnUpdateCallback onUpdateCallback) {
-        Set<String> ignorePackages = mPackagesToIgnore.get(user);
-        if (ignorePackages == null) {
-            ignorePackages = Collections.emptySet();
-        }
-        long userSerial = mIconCache.getSerialNumberForUser(user);
-
-        Stack<T> appsToUpdate = new Stack<>();
-
-        try (Cursor c = mIconCache.mIconDb.query(
-                new String[]{IconDB.COLUMN_ROWID, IconDB.COLUMN_COMPONENT,
-                        IconDB.COLUMN_LAST_UPDATED, IconDB.COLUMN_VERSION,
-                        IconDB.COLUMN_SYSTEM_STATE},
-                IconDB.COLUMN_USER + " = ? ",
-                new String[]{Long.toString(userSerial)})) {
-
-            final int indexComponent = c.getColumnIndex(IconDB.COLUMN_COMPONENT);
-            final int indexLastUpdate = c.getColumnIndex(IconDB.COLUMN_LAST_UPDATED);
-            final int indexVersion = c.getColumnIndex(IconDB.COLUMN_VERSION);
-            final int rowIndex = c.getColumnIndex(IconDB.COLUMN_ROWID);
-            final int systemStateIndex = c.getColumnIndex(IconDB.COLUMN_SYSTEM_STATE);
-
-            while (c.moveToNext()) {
-                String cn = c.getString(indexComponent);
-                ComponentName component = ComponentName.unflattenFromString(cn);
-                PackageInfo info = mPkgInfoMap.get(component.getPackageName());
-
-                int rowId = c.getInt(rowIndex);
-                if (info == null) {
-                    if (!ignorePackages.contains(component.getPackageName())) {
-
-                        if (mFilterMode == MODE_SET_INVALID_ITEMS) {
-                            mIconCache.remove(component, user);
-                            mItemsToDelete.put(rowId, true);
-                        }
-                    }
-                    continue;
-                }
-                if ((info.applicationInfo.flags & ApplicationInfo.FLAG_IS_DATA_ONLY) != 0) {
-                    // Application is not present
-                    continue;
-                }
-
-                long updateTime = c.getLong(indexLastUpdate);
-                int version = c.getInt(indexVersion);
-                T app = componentMap.remove(component);
-                if (version == info.versionCode
-                        && updateTime == cachingLogic.getLastUpdatedTime(app, info)
-                        && TextUtils.equals(c.getString(systemStateIndex),
-                                mIconCache.getIconSystemState(info.packageName))) {
-
-                    if (mFilterMode == MODE_CLEAR_VALID_ITEMS) {
-                        mItemsToDelete.put(rowId, false);
-                    }
-                    continue;
-                }
-
-                if (app == null) {
-                    if (mFilterMode == MODE_SET_INVALID_ITEMS) {
-                        mIconCache.remove(component, user);
-                        mItemsToDelete.put(rowId, true);
-                    }
-                } else {
-                    appsToUpdate.add(app);
-                }
-            }
-        } catch (SQLiteException e) {
-            Log.d(TAG, "Error reading icon cache", e);
-            // Continue updating whatever we have read so far
-        }
-
-        // Insert remaining apps.
-        if (!componentMap.isEmpty() || !appsToUpdate.isEmpty()) {
-            Stack<T> appsToAdd = new Stack<>();
-            appsToAdd.addAll(componentMap.values());
-            new SerializedIconUpdateTask(userSerial, user, appsToAdd, appsToUpdate, cachingLogic,
-                    onUpdateCallback).scheduleNext();
-        }
-    }
-
-    /**
-     * 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
-        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)) {
-                if (deleteCount > 0) {
-                    queryBuilder.append(", ");
-                }
-                queryBuilder.append(mItemsToDelete.keyAt(i));
-                deleteCount++;
-            }
-        }
-        queryBuilder.append(')');
-
-        if (deleteCount > 0) {
-            mIconCache.mIconDb.delete(queryBuilder.toString(), null);
-        }
-    }
-
-    /**
-     * A runnable that updates invalid icons and adds missing icons in the DB for the provided
-     * LauncherActivityInfo list. Items are updated/added one at a time, so that the
-     * worker thread doesn't get blocked.
-     */
-    private class SerializedIconUpdateTask<T> implements Runnable {
-        private final long mUserSerial;
-        private final UserHandle mUserHandle;
-        private final Stack<T> mAppsToAdd;
-        private final Stack<T> mAppsToUpdate;
-        private final CachingLogic<T> mCachingLogic;
-        private final HashSet<String> mUpdatedPackages = new HashSet<>();
-        private final OnUpdateCallback mOnUpdateCallback;
-
-        SerializedIconUpdateTask(long userSerial, UserHandle userHandle,
-                Stack<T> appsToAdd, Stack<T> appsToUpdate, CachingLogic<T> cachingLogic,
-                OnUpdateCallback onUpdateCallback) {
-            mUserHandle = userHandle;
-            mUserSerial = userSerial;
-            mAppsToAdd = appsToAdd;
-            mAppsToUpdate = appsToUpdate;
-            mCachingLogic = cachingLogic;
-            mOnUpdateCallback = onUpdateCallback;
-        }
-
-        @Override
-        public void run() {
-            if (!mAppsToUpdate.isEmpty()) {
-                T app = mAppsToUpdate.pop();
-                String pkg = mCachingLogic.getComponent(app).getPackageName();
-                PackageInfo info = mPkgInfoMap.get(pkg);
-
-                mIconCache.addIconToDBAndMemCache(
-                        app, mCachingLogic, info, mUserSerial, true /*replace existing*/);
-                mUpdatedPackages.add(pkg);
-
-                if (mAppsToUpdate.isEmpty() && !mUpdatedPackages.isEmpty()) {
-                    // No more app to update. Notify callback.
-                    mOnUpdateCallback.onPackageIconsUpdated(mUpdatedPackages, mUserHandle);
-                }
-
-                // Let it run one more time.
-                scheduleNext();
-            } else if (!mAppsToAdd.isEmpty()) {
-                T app = mAppsToAdd.pop();
-                PackageInfo info = mPkgInfoMap.get(mCachingLogic.getComponent(app).getPackageName());
-                // We do not check the mPkgInfoMap when generating the mAppsToAdd. Although every
-                // app should have package info, this is not guaranteed by the api
-                if (info != null) {
-                    mIconCache.addIconToDBAndMemCache(app, mCachingLogic, info,
-                            mUserSerial, false /*replace existing*/);
-                }
-
-                if (!mAppsToAdd.isEmpty()) {
-                    scheduleNext();
-                }
-            }
-        }
-
-        public void scheduleNext() {
-            mIconCache.mWorkerHandler.postAtTime(this, ICON_UPDATE_TOKEN,
-                    SystemClock.uptimeMillis() + 1);
-        }
-    }
-
-    public interface OnUpdateCallback {
-
-        void onPackageIconsUpdated(HashSet<String> updatedPackages, UserHandle user);
-    }
-}
-=======
->>>>>>> CHANGE (805b52 Removes iconloaderlib from Launcher3.)
diff --git a/quickstep/recents_ui_overrides/src/com/android/launcher3/hybridhotseat/HotseatEduDialog.java b/quickstep/recents_ui_overrides/src/com/android/launcher3/hybridhotseat/HotseatEduDialog.java
index 2b3f395..4b8e434 100644
--- a/quickstep/recents_ui_overrides/src/com/android/launcher3/hybridhotseat/HotseatEduDialog.java
+++ b/quickstep/recents_ui_overrides/src/com/android/launcher3/hybridhotseat/HotseatEduDialog.java
@@ -54,7 +54,6 @@
     private static final int DEFAULT_CLOSE_DURATION = 200;
     protected static final int FINAL_SCRIM_BG_COLOR = 0x88000000;
 
-
     // we use this value to keep track of migration logs as we experiment with different migrations
     private static final int MIGRATION_EXPERIMENT_IDENTIFIER = 1;
 
diff --git a/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/QuickstepLauncher.java b/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/QuickstepLauncher.java
index 7d86cea..9a03d92 100644
--- a/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/QuickstepLauncher.java
+++ b/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/QuickstepLauncher.java
@@ -186,7 +186,8 @@
         boolean willUserBeActive = (getActivityFlags() & ACTIVITY_STATE_USER_WILL_BE_ACTIVE) != 0;
         boolean visible = (state == NORMAL || state == OVERVIEW)
                 && (willUserBeActive || isUserActive())
-                && !profile.isVerticalBarLayout();
+                && !profile.isVerticalBarLayout()
+                && profile.isPhone && !profile.isLandscape;
         UiThreadHelper.runAsyncCommand(this, SET_SHELF_HEIGHT, visible ? 1 : 0,
                 profile.hotseatBarSizePx);
         if (state == NORMAL && !inTransition) {
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/TouchInteractionService.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/TouchInteractionService.java
index 6e0b517..a3705fd 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/TouchInteractionService.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/TouchInteractionService.java
@@ -58,6 +58,7 @@
 
 import com.android.launcher3.BaseDraggingActivity;
 import com.android.launcher3.R;
+import com.android.launcher3.ResourceUtils;
 import com.android.launcher3.Utilities;
 import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.logging.UserEventDispatcher;
@@ -75,6 +76,7 @@
 import com.android.quickstep.inputconsumers.AccessibilityInputConsumer;
 import com.android.quickstep.inputconsumers.AssistantInputConsumer;
 import com.android.quickstep.inputconsumers.DeviceLockedInputConsumer;
+import com.android.quickstep.inputconsumers.OneHandedModeInputConsumer;
 import com.android.quickstep.inputconsumers.OtherActivityInputConsumer;
 import com.android.quickstep.inputconsumers.OverscrollInputConsumer;
 import com.android.quickstep.inputconsumers.OverviewInputConsumer;
@@ -297,6 +299,7 @@
         mAM = ActivityManagerWrapper.getInstance();
         mDeviceState = new RecentsAnimationDeviceState(this);
         mDeviceState.addNavigationModeChangedCallback(this::onNavigationModeChanged);
+        mDeviceState.addOneHandedModeChangedCallback(this::onOneHandedModeOverlayChanged);
         mDeviceState.runOnUserUnlocked(this::onUserUnlocked);
         ProtoTracer.INSTANCE.get(this).add(this);
 
@@ -337,6 +340,13 @@
         resetHomeBounceSeenOnQuickstepEnabledFirstTime();
     }
 
+    /**
+     * Called when the one handed mode overlay package changes, to recreate touch region.
+     */
+    private void onOneHandedModeOverlayChanged(int newGesturalHeight) {
+        initInputMonitor();
+    }
+
     @UiThread
     public void onUserUnlocked() {
         mTaskAnimationManager = new TaskAnimationManager();
@@ -502,6 +512,11 @@
                 } else {
                     mUncheckedConsumer = InputConsumer.NO_OP;
                 }
+            } else if (mDeviceState.canTriggerOneHandedAction(event)
+                    && !mDeviceState.isOneHandedModeActive()) {
+                // Consume gesture event for triggering one handed feature.
+                mUncheckedConsumer = new OneHandedModeInputConsumer(this, mDeviceState,
+                        InputConsumer.NO_OP, mInputMonitorCompat);
             } else {
                 mUncheckedConsumer = InputConsumer.NO_OP;
             }
@@ -626,6 +641,11 @@
                 base = new ScreenPinnedInputConsumer(this, newGestureState);
             }
 
+            if (mDeviceState.canTriggerOneHandedAction(event)) {
+                base = new OneHandedModeInputConsumer(this, mDeviceState, base,
+                        mInputMonitorCompat);
+            }
+
             if (mDeviceState.isAccessibilityMenuAvailable()) {
                 base = new AccessibilityInputConsumer(this, mDeviceState, base,
                         mInputMonitorCompat);
@@ -634,6 +654,11 @@
             if (mDeviceState.isScreenPinningActive()) {
                 base = mResetGestureInputConsumer;
             }
+
+            if (mDeviceState.canTriggerOneHandedAction(event)) {
+                base = new OneHandedModeInputConsumer(this, mDeviceState, base,
+                        mInputMonitorCompat);
+            }
         }
         return base;
     }
@@ -801,6 +826,13 @@
         }
         if (mOverviewComponentObserver.canHandleConfigChanges(activity.getComponentName(),
                 activity.getResources().getConfiguration().diff(newConfig))) {
+            // Since navBar gestural height are different between portrait and landscape,
+            // can handle orientation changes and refresh navigation gestural region through
+            // onOneHandedModeChanged()
+            int newGesturalHeight = ResourceUtils.getNavbarSize(
+                    ResourceUtils.NAVBAR_BOTTOM_GESTURE_SIZE,
+                    getApplicationContext().getResources());
+            mDeviceState.onOneHandedModeChanged(newGesturalHeight);
             return;
         }
 
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/inputconsumers/OneHandedModeInputConsumer.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/inputconsumers/OneHandedModeInputConsumer.java
new file mode 100644
index 0000000..0bb8fff
--- /dev/null
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/inputconsumers/OneHandedModeInputConsumer.java
@@ -0,0 +1,159 @@
+/*
+ * Copyright (C) 2019 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.quickstep.inputconsumers;
+
+import static android.view.MotionEvent.ACTION_CANCEL;
+import static android.view.MotionEvent.ACTION_DOWN;
+import static android.view.MotionEvent.ACTION_MOVE;
+import static android.view.MotionEvent.ACTION_UP;
+
+import static com.android.launcher3.Utilities.squaredHypot;
+
+import android.content.Context;
+import android.graphics.PointF;
+import android.view.MotionEvent;
+
+import com.android.launcher3.R;
+import com.android.launcher3.Utilities;
+import com.android.quickstep.InputConsumer;
+import com.android.quickstep.RecentsAnimationDeviceState;
+import com.android.quickstep.SystemUiProxy;
+import com.android.systemui.shared.system.InputMonitorCompat;
+
+/**
+ * Touch consumer for handling gesture event to launch one handed
+ * One handed gestural in quickstep only active on NO_BUTTON, TWO_BUTTONS, and portrait mode
+ */
+public class OneHandedModeInputConsumer extends DelegateInputConsumer {
+
+    private static final String TAG = "OneHandedModeInputConsumer";
+    private static final int ANGLE_MAX = 150;
+    private static final int ANGLE_MIN = 30;
+
+    private final Context mContext;
+    private final RecentsAnimationDeviceState mDeviceState;
+
+    private final float mDragDistThreshold;
+    private final float mSquaredSlop;
+
+    private final PointF mDownPos = new PointF();
+    private final PointF mLastPos = new PointF();
+    private final PointF mStartDragPos = new PointF();
+
+    private boolean mPassedSlop;
+
+    public OneHandedModeInputConsumer(Context context, RecentsAnimationDeviceState deviceState,
+            InputConsumer delegate, InputMonitorCompat inputMonitor) {
+        super(delegate, inputMonitor);
+        mContext = context;
+        mDeviceState = deviceState;
+        mDragDistThreshold = context.getResources().getDimensionPixelSize(
+                R.dimen.gestures_onehanded_drag_threshold);
+        mSquaredSlop = Utilities.squaredTouchSlop(context);
+    }
+
+    @Override
+    public int getType() {
+        return TYPE_ONE_HANDED | mDelegate.getType();
+    }
+
+    @Override
+    public void onMotionEvent(MotionEvent ev) {
+        switch (ev.getActionMasked()) {
+            case ACTION_DOWN: {
+                mDownPos.set(ev.getX(), ev.getY());
+                mLastPos.set(mDownPos);
+                break;
+            }
+            case ACTION_MOVE: {
+                if (mState == STATE_DELEGATE_ACTIVE) {
+                    break;
+                }
+                if (!mDelegate.allowInterceptByParent()) {
+                    mState = STATE_DELEGATE_ACTIVE;
+                    break;
+                }
+
+                mLastPos.set(ev.getX(), ev.getY());
+                if (!mPassedSlop) {
+                    if (squaredHypot(mLastPos.x - mDownPos.x, mLastPos.y - mDownPos.y)
+                            > mSquaredSlop) {
+                        mStartDragPos.set(mLastPos.x, mLastPos.y);
+                        if ((!mDeviceState.isOneHandedModeActive() && isValidStartAngle(
+                                mDownPos.x - mLastPos.x, mDownPos.y - mLastPos.y))
+                                || (mDeviceState.isOneHandedModeActive() && isValidExitAngle(
+                                mDownPos.x - mLastPos.x, mDownPos.y - mLastPos.y))) {
+                            mPassedSlop = true;
+                            setActive(ev);
+                        } else {
+                            mState = STATE_DELEGATE_ACTIVE;
+                        }
+                    }
+                } else {
+                    float distance = (float) Math.hypot(mLastPos.x - mStartDragPos.x,
+                            mLastPos.y - mStartDragPos.y);
+                    if (distance > mDragDistThreshold && mPassedSlop) {
+                        onStopGestureDetected();
+                    }
+                }
+                break;
+            }
+            case ACTION_UP:
+            case ACTION_CANCEL: {
+                if (mLastPos.y >= mStartDragPos.y && mPassedSlop) {
+                    onStartGestureDetected();
+                }
+
+                mPassedSlop = false;
+                mState = STATE_INACTIVE;
+                break;
+            }
+        }
+
+        if (mState != STATE_ACTIVE) {
+            mDelegate.onMotionEvent(ev);
+        }
+    }
+
+    private void onStartGestureDetected() {
+        if (mDeviceState.isOneHandedModeEnabled()) {
+            if (!mDeviceState.isOneHandedModeActive()) {
+                SystemUiProxy.INSTANCE.get(mContext).startOneHandedMode();
+            }
+        } else if (mDeviceState.isSwipeToNotificationEnabled()) {
+            SystemUiProxy.INSTANCE.get(mContext).expandNotificationPanel();
+        }
+    }
+
+    private void onStopGestureDetected() {
+        if (!mDeviceState.isOneHandedModeEnabled() || !mDeviceState.isOneHandedModeActive()) {
+            return;
+        }
+
+        SystemUiProxy.INSTANCE.get(mContext).stopOneHandedMode();
+    }
+
+    private boolean isValidStartAngle(float deltaX, float deltaY) {
+        final float angle = (float) Math.toDegrees(Math.atan2(deltaY, deltaX));
+        return angle > -(ANGLE_MAX) && angle < -(ANGLE_MIN);
+    }
+
+    private boolean isValidExitAngle(float deltaX, float deltaY) {
+        final float angle = (float) Math.toDegrees(Math.atan2(deltaY, deltaX));
+        return angle > ANGLE_MIN && angle < ANGLE_MAX;
+    }
+}
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/inputconsumers/OverviewInputConsumer.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/inputconsumers/OverviewInputConsumer.java
index 32b1c58..9bfe84f 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/inputconsumers/OverviewInputConsumer.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/inputconsumers/OverviewInputConsumer.java
@@ -108,4 +108,5 @@
             mActivity.dispatchKeyEvent(ev);
         }
     }
-}
\ No newline at end of file
+}
+
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/util/SurfaceTransactionApplier.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/util/SurfaceTransactionApplier.java
index 0a3e3ec..0436a1c 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/util/SurfaceTransactionApplier.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/util/SurfaceTransactionApplier.java
@@ -16,7 +16,6 @@
 package com.android.quickstep.util;
 
 import static com.android.systemui.shared.system.TransactionCompat.deferTransactionUntil;
-import static com.android.systemui.shared.system.TransactionCompat.setEarlyWakeup;
 
 import android.annotation.TargetApi;
 import android.os.Build;
@@ -95,7 +94,6 @@
                     surfaceParams.applyTo(t);
                 }
             }
-            setEarlyWakeup(t);
             t.apply();
             Message.obtain(mApplyHandler, MSG_UPDATE_SEQUENCE_NUMBER, toApplySeqNo, 0)
                     .sendToTarget();
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/util/TransformParams.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/util/TransformParams.java
index 45f49bb..756331d 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/util/TransformParams.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/util/TransformParams.java
@@ -213,7 +213,6 @@
             for (SurfaceParams param : params) {
                 SyncRtSurfaceTransactionApplierCompat.applyParams(t, param);
             }
-            t.setEarlyWakeup();
             t.apply();
         }
     }
diff --git a/quickstep/res/values/dimens.xml b/quickstep/res/values/dimens.xml
index 9d70316..6737c5f 100644
--- a/quickstep/res/values/dimens.xml
+++ b/quickstep/res/values/dimens.xml
@@ -76,6 +76,10 @@
     <dimen name="gestures_assistant_drag_threshold">55dp</dimen>
     <dimen name="gestures_assistant_fling_threshold">55dp</dimen>
 
+    <!-- One-Handed Mode -->
+    <!-- Threshold for draging distance to enable one-handed mode -->
+    <dimen name="gestures_onehanded_drag_threshold">20dp</dimen>
+
     <!-- Distance to move elements when swiping up to go home from launcher -->
     <dimen name="home_pullback_distance">28dp</dimen>
 
diff --git a/quickstep/res/values/strings.xml b/quickstep/res/values/strings.xml
index 769d298..86120e3 100644
--- a/quickstep/res/values/strings.xml
+++ b/quickstep/res/values/strings.xml
@@ -163,4 +163,4 @@
     <string name="action_screenshot">Screenshot</string>
     <!-- Message shown when an action is blocked by a policy enforced by the app or the organization managing the device. [CHAR_LIMIT=NONE] -->
     <string name="blocked_by_policy">This action isn\'t allowed by the app or your organization</string>
-</resources>
\ No newline at end of file
+</resources>
diff --git a/quickstep/src/com/android/launcher3/LauncherAnimationRunner.java b/quickstep/src/com/android/launcher3/LauncherAnimationRunner.java
index 5ad0bca..02769c6 100644
--- a/quickstep/src/com/android/launcher3/LauncherAnimationRunner.java
+++ b/quickstep/src/com/android/launcher3/LauncherAnimationRunner.java
@@ -158,4 +158,4 @@
             }
         }
     }
-}
\ No newline at end of file
+}
diff --git a/quickstep/src/com/android/launcher3/QuickstepAppTransitionManagerImpl.java b/quickstep/src/com/android/launcher3/QuickstepAppTransitionManagerImpl.java
index bd97f65..2d096d1 100644
--- a/quickstep/src/com/android/launcher3/QuickstepAppTransitionManagerImpl.java
+++ b/quickstep/src/com/android/launcher3/QuickstepAppTransitionManagerImpl.java
@@ -608,8 +608,10 @@
                         }
 
                         matrix.setTranslate(tmpPos.x, tmpPos.y);
+                        final Rect crop = new Rect(target.screenSpaceBounds);
+                        crop.offsetTo(0, 0);
                         builder.withMatrix(matrix)
-                                .withWindowCrop(target.screenSpaceBounds)
+                                .withWindowCrop(crop)
                                 .withAlpha(1f);
                     }
                     params[i] = builder.build();
@@ -776,8 +778,10 @@
                         builder.withMatrix(matrix)
                                 .withAlpha(1f);
                     }
+                    final Rect crop = new Rect(target.screenSpaceBounds);
+                    crop.offsetTo(0, 0);
                     params[i] = builder
-                            .withWindowCrop(target.screenSpaceBounds)
+                            .withWindowCrop(crop)
                             .build();
                 }
                 surfaceApplier.scheduleApply(params);
diff --git a/quickstep/src/com/android/launcher3/uioverrides/DejankBinderTracker.java b/quickstep/src/com/android/launcher3/uioverrides/DejankBinderTracker.java
new file mode 100644
index 0000000..d8aa235
--- /dev/null
+++ b/quickstep/src/com/android/launcher3/uioverrides/DejankBinderTracker.java
@@ -0,0 +1,159 @@
+/**
+ * Copyright (C) 2019 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.uioverrides;
+
+import static android.os.IBinder.FLAG_ONEWAY;
+
+import android.os.Binder;
+import android.os.Build;
+import android.os.IBinder;
+import android.os.Looper;
+import android.os.RemoteException;
+import android.util.Log;
+
+import androidx.annotation.MainThread;
+
+import java.util.HashSet;
+import java.util.Locale;
+import java.util.function.BiConsumer;
+import java.util.function.Supplier;
+
+/**
+ * A binder proxy transaction listener for tracking non-whitelisted binder calls.
+ */
+public class DejankBinderTracker implements Binder.ProxyTransactListener {
+    private static final String TAG = "DejankBinderTracker";
+
+    private static final Object sLock = new Object();
+    private static final HashSet<String> sWhitelistedFrameworkClasses = new HashSet<>();
+    static {
+        // Common IPCs that are ok to block the main thread.
+        sWhitelistedFrameworkClasses.add("android.view.IWindowSession");
+        sWhitelistedFrameworkClasses.add("android.os.IPowerManager");
+    }
+    private static boolean sTemporarilyIgnoreTracking = false;
+
+    // Used by the client to limit binder tracking to specific regions
+    private static boolean sTrackingAllowed = false;
+
+    private BiConsumer<String, Integer> mUnexpectedTransactionCallback;
+    private boolean mIsTracking = false;
+
+    /**
+     * Temporarily ignore blocking binder calls for the duration of this {@link Runnable}.
+     */
+    @MainThread
+    public static void whitelistIpcs(Runnable runnable) {
+        sTemporarilyIgnoreTracking = true;
+        runnable.run();
+        sTemporarilyIgnoreTracking = false;
+    }
+
+    /**
+     * Temporarily ignore blocking binder calls for the duration of this {@link Supplier}.
+     */
+    @MainThread
+    public static <T> T whitelistIpcs(Supplier<T> supplier) {
+        sTemporarilyIgnoreTracking = true;
+        T value = supplier.get();
+        sTemporarilyIgnoreTracking = false;
+        return value;
+    }
+
+    /**
+     * Enables binder tracking during a test.
+     */
+    @MainThread
+    public static void allowBinderTrackingInTests() {
+        sTrackingAllowed = true;
+    }
+
+    /**
+     * Disables binder tracking during a test.
+     */
+    @MainThread
+    public static void disallowBinderTrackingInTests() {
+        sTrackingAllowed = false;
+    }
+
+    public DejankBinderTracker(BiConsumer<String, Integer> unexpectedTransactionCallback) {
+        mUnexpectedTransactionCallback = unexpectedTransactionCallback;
+    }
+
+    @MainThread
+    public void startTracking() {
+        if (!Build.TYPE.toLowerCase(Locale.ROOT).contains("debug")
+                && !Build.TYPE.toLowerCase(Locale.ROOT).equals("eng")) {
+            Log.wtf(TAG, "Unexpected use of binder tracker in non-debug build", new Exception());
+            return;
+        }
+        if (mIsTracking) {
+            return;
+        }
+        mIsTracking = true;
+        Binder.setProxyTransactListener(this);
+    }
+
+    @MainThread
+    public void stopTracking() {
+        if (!mIsTracking) {
+            return;
+        }
+        mIsTracking = false;
+        Binder.setProxyTransactListener(null);
+    }
+
+    // Override the hidden Binder#onTransactStarted method
+    public synchronized Object onTransactStarted(IBinder binder, int transactionCode, int flags) {
+        if (!mIsTracking
+                || !sTrackingAllowed
+                || sTemporarilyIgnoreTracking
+                || (flags & FLAG_ONEWAY) == FLAG_ONEWAY
+                || !isMainThread()) {
+            return null;
+        }
+
+        String descriptor;
+        try {
+            descriptor = binder.getInterfaceDescriptor();
+            if (sWhitelistedFrameworkClasses.contains(descriptor)) {
+                return null;
+            }
+        } catch (RemoteException e) {
+            e.printStackTrace();
+            descriptor = binder.getClass().getSimpleName();
+        }
+
+        mUnexpectedTransactionCallback.accept(descriptor, transactionCode);
+        return null;
+    }
+
+    @Override
+    public Object onTransactStarted(IBinder binder, int transactionCode) {
+        // Do nothing
+        return null;
+    }
+
+    @Override
+    public void onTransactEnded(Object session) {
+        // Do nothing
+    }
+
+    public static boolean isMainThread() {
+        return Thread.currentThread() == Looper.getMainLooper().getThread();
+    }
+}
diff --git a/quickstep/src/com/android/quickstep/InputConsumer.java b/quickstep/src/com/android/quickstep/InputConsumer.java
index ec720d5..67711c0 100644
--- a/quickstep/src/com/android/quickstep/InputConsumer.java
+++ b/quickstep/src/com/android/quickstep/InputConsumer.java
@@ -35,6 +35,7 @@
     int TYPE_RESET_GESTURE = 1 << 8;
     int TYPE_OVERSCROLL = 1 << 9;
     int TYPE_SYSUI_OVERLAY = 1 << 10;
+    int TYPE_ONE_HANDED = 1 << 11;
 
     String[] NAMES = new String[] {
            "TYPE_NO_OP",                    // 0
@@ -47,7 +48,8 @@
             "TYPE_OVERVIEW_WITHOUT_FOCUS",  // 7
             "TYPE_RESET_GESTURE",           // 8
             "TYPE_OVERSCROLL",              // 9
-            "TYPE_SYSUI_OVERLAY"         // 10
+            "TYPE_SYSUI_OVERLAY",           // 10
+            "TYPE_ONE_HANDED",              // 11
     };
 
     InputConsumer NO_OP = () -> TYPE_NO_OP;
diff --git a/quickstep/src/com/android/quickstep/OrientationTouchTransformer.java b/quickstep/src/com/android/quickstep/OrientationTouchTransformer.java
index 1081548..0710a0a 100644
--- a/quickstep/src/com/android/quickstep/OrientationTouchTransformer.java
+++ b/quickstep/src/com/android/quickstep/OrientationTouchTransformer.java
@@ -63,7 +63,9 @@
     private SparseArray<OrientationRectF> mSwipeTouchRegions = new SparseArray<>(MAX_ORIENTATIONS);
     private final RectF mAssistantLeftRegion = new RectF();
     private final RectF mAssistantRightRegion = new RectF();
+    private final RectF mOneHandedModeRegion = new RectF();
     private int mCurrentDisplayRotation;
+    private int mNavBarGesturalHeight;
     private boolean mEnableMultipleRegions;
     private Resources mResources;
     private OrientationRectF mLastRectTouched;
@@ -103,18 +105,33 @@
         mResources = resources;
         mMode = mode;
         mContractInfo = contractInfo;
+        mNavBarGesturalHeight = getNavbarSize(ResourceUtils.NAVBAR_BOTTOM_GESTURE_SIZE);
     }
 
-    void setNavigationMode(SysUINavigationMode.Mode newMode, DefaultDisplay.Info info) {
+    private void refreshTouchRegion(DefaultDisplay.Info info, Resources newRes) {
+        // Swipe touch regions are independent of nav mode, so we have to clear them explicitly
+        // here to avoid, for ex, a nav region for 2-button rotation 0 being used for 3-button mode
+        // It tries to cache and reuse swipe regions whenever possible based only on rotation
+        mResources = newRes;
+        mSwipeTouchRegions.clear();
+        resetSwipeRegions(info);
+    }
+
+    void setNavigationMode(SysUINavigationMode.Mode newMode, DefaultDisplay.Info info,
+            Resources newRes) {
         if (mMode == newMode) {
             return;
         }
         this.mMode = newMode;
-        // Swipe touch regions are independent of nav mode, so we have to clear them explicitly
-        // here to avoid, for ex, a nav region for 2-button rotation 0 being used for 3-button mode
-        // It tries to cache and reuse swipe regions whenever possible based only on rotation
-        mSwipeTouchRegions.clear();
-        resetSwipeRegions(info);
+        refreshTouchRegion(info, newRes);
+    }
+
+    void setGesturalHeight(int newGesturalHeight, DefaultDisplay.Info info, Resources newRes) {
+        if (mNavBarGesturalHeight == newGesturalHeight) {
+            return;
+        }
+        mNavBarGesturalHeight = newGesturalHeight;
+        refreshTouchRegion(info, newRes);
     }
 
     /**
@@ -216,10 +233,10 @@
 
         Point size = display.realSize;
         int rotation = display.rotation;
+        int touchHeight = mNavBarGesturalHeight;
         OrientationRectF orientationRectF =
                 new OrientationRectF(0, 0, size.x, size.y, rotation);
         if (mMode == SysUINavigationMode.Mode.NO_BUTTON) {
-            int touchHeight = getNavbarSize(ResourceUtils.NAVBAR_BOTTOM_GESTURE_SIZE);
             orientationRectF.top = orientationRectF.bottom - touchHeight;
             updateAssistantRegions(orientationRectF);
         } else {
@@ -235,10 +252,11 @@
                             + getNavbarSize(ResourceUtils.NAVBAR_LANDSCAPE_LEFT_RIGHT_SIZE);
                     break;
                 default:
-                    orientationRectF.top = orientationRectF.bottom
-                            - getNavbarSize(ResourceUtils.NAVBAR_BOTTOM_GESTURE_SIZE);
+                    orientationRectF.top = orientationRectF.bottom - touchHeight;
             }
         }
+        // One handed gestural only active on portrait mode
+        mOneHandedModeRegion.set(0, orientationRectF.bottom - touchHeight, size.x, size.y);
 
         return orientationRectF;
     }
@@ -264,6 +282,10 @@
 
     }
 
+    boolean touchInOneHandedModeRegion(MotionEvent ev) {
+        return mOneHandedModeRegion.contains(ev.getX(), ev.getY());
+    }
+
     private int getNavbarSize(String resName) {
         return ResourceUtils.getNavbarSize(resName, mResources);
     }
@@ -355,6 +377,8 @@
             regions.append(rectF.mRotation).append(" ");
         }
         pw.println(regions.toString());
+        pw.println("  mNavBarGesturalHeight=" + mNavBarGesturalHeight);
+        pw.println("  mOneHandedModeRegion=" + mOneHandedModeRegion);
     }
 
     private class OrientationRectF extends RectF {
diff --git a/quickstep/src/com/android/quickstep/RecentsAnimationDeviceState.java b/quickstep/src/com/android/quickstep/RecentsAnimationDeviceState.java
index 0a70bd6..6b0c395 100644
--- a/quickstep/src/com/android/quickstep/RecentsAnimationDeviceState.java
+++ b/quickstep/src/com/android/quickstep/RecentsAnimationDeviceState.java
@@ -31,6 +31,7 @@
 import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_HOME_DISABLED;
 import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_NAV_BAR_HIDDEN;
 import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_NOTIFICATION_PANEL_EXPANDED;
+import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_ONE_HANDED_ACTIVE;
 import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_OVERVIEW_DISABLED;
 import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_QUICK_SETTINGS_EXPANDED;
 import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_SCREEN_PINNING;
@@ -45,11 +46,14 @@
 import android.content.res.Resources;
 import android.graphics.Region;
 import android.os.Process;
+import android.os.SystemProperties;
 import android.os.UserManager;
 import android.provider.Settings;
 import android.text.TextUtils;
+import android.util.DisplayMetrics;
 import android.view.MotionEvent;
 import android.view.OrientationEventListener;
+import android.view.Surface;
 
 import androidx.annotation.BinderThread;
 
@@ -59,6 +63,7 @@
 import com.android.launcher3.util.DefaultDisplay;
 import com.android.launcher3.util.SecureSettingsObserver;
 import com.android.quickstep.SysUINavigationMode.NavigationModeChangeListener;
+import com.android.quickstep.SysUINavigationMode.OneHandedModeChangeListener;
 import com.android.quickstep.util.NavBarPosition;
 import com.android.quickstep.util.RecentsOrientedState;
 import com.android.systemui.shared.system.ActivityManagerWrapper;
@@ -77,7 +82,8 @@
  */
 public class RecentsAnimationDeviceState implements
         NavigationModeChangeListener,
-        DefaultDisplay.DisplayInfoChangeListener {
+        DefaultDisplay.DisplayInfoChangeListener,
+        OneHandedModeChangeListener {
 
     private final Context mContext;
     private final SysUINavigationMode mSysUiNavMode;
@@ -94,6 +100,8 @@
     private final Region mDeferredGestureRegion = new Region();
     private boolean mAssistantAvailable;
     private float mAssistantVisibility;
+    private boolean mIsOneHandedModeEnabled;
+    private boolean mIsSwipeToNotificationEnabled;
 
     private boolean mIsUserUnlocked;
     private final ArrayList<Runnable> mUserUnlockedActions = new ArrayList<>();
@@ -231,6 +239,22 @@
             }
         }
 
+        if (SystemProperties.getBoolean("ro.support_one_handed_mode", false)) {
+            SecureSettingsObserver oneHandedEnabledObserver =
+                    SecureSettingsObserver.newOneHandedSettingsObserver(
+                            mContext, enabled -> mIsOneHandedModeEnabled = enabled);
+            oneHandedEnabledObserver.register();
+            oneHandedEnabledObserver.dispatchOnChange();
+            runOnDestroy(oneHandedEnabledObserver::unregister);
+        }
+
+        SecureSettingsObserver swipeBottomEnabledObserver =
+                SecureSettingsObserver.newSwipeToNotificationSettingsObserver(
+                        mContext, enabled -> mIsSwipeToNotificationEnabled = enabled);
+        swipeBottomEnabledObserver.register();
+        swipeBottomEnabledObserver.dispatchOnChange();
+        runOnDestroy(swipeBottomEnabledObserver::unregister);
+
         SecureSettingsObserver userSetupObserver = new SecureSettingsObserver(
                 context.getContentResolver(),
                 e -> mIsUserSetupComplete = e,
@@ -297,6 +321,15 @@
         runOnDestroy(() -> mSysUiNavMode.removeModeChangeListener(listener));
     }
 
+    /**
+     * Adds a listener for the one handed mode change,
+     * guaranteed to be called after the device state's mode has changed.
+     */
+    public void addOneHandedModeChangedCallback(OneHandedModeChangeListener listener) {
+        listener.onOneHandedModeChanged(mSysUiNavMode.addOneHandedOverlayChangeListener(listener));
+        runOnDestroy(() -> mSysUiNavMode.removeOneHandedOverlayChangeListener(listener));
+    }
+
     @Override
     public void onNavigationModeChanged(SysUINavigationMode.Mode newMode) {
         mDefaultDisplay.removeChangeListener(this);
@@ -311,7 +344,8 @@
 
         mNavBarPosition = new NavBarPosition(newMode, mDefaultDisplay.getInfo());
 
-        mOrientationTouchTransformer.setNavigationMode(newMode, mDefaultDisplay.getInfo());
+        mOrientationTouchTransformer.setNavigationMode(newMode, mDefaultDisplay.getInfo(),
+                mContext.getApplicationContext().getResources());
         if (!mMode.hasGestures && newMode.hasGestures) {
             setupOrientationSwipeHandler();
         } else if (mMode.hasGestures && !newMode.hasGestures){
@@ -352,6 +386,12 @@
         }
     }
 
+    @Override
+    public void onOneHandedModeChanged(int newGesturalHeight) {
+        mOrientationTouchTransformer.setGesturalHeight(newGesturalHeight, mDefaultDisplay.getInfo(),
+                mContext.getApplicationContext().getResources());
+    }
+
     /**
      * @return the current navigation mode for the device.
      */
@@ -564,6 +604,13 @@
     }
 
     /**
+     * @return whether screen pinning is enabled and active
+     */
+    public boolean isOneHandedModeActive() {
+        return (mSystemUiStateFlags & SYSUI_STATE_ONE_HANDED_ACTIVE) != 0;
+    }
+
+    /**
      * Sets the region in screen space where the gestures should be deferred (ie. due to specific
      * nav bar ui).
      */
@@ -626,6 +673,32 @@
     }
 
     /**
+     * One handed gestural in quickstep only active on NO_BUTTON, TWO_BUTTONS, and portrait mode
+     *
+     * @param ev The touch screen motion event.
+     * @return whether the given motion event can trigger the one handed mode.
+     */
+    public boolean canTriggerOneHandedAction(MotionEvent ev) {
+        if (!mIsOneHandedModeEnabled && !mIsSwipeToNotificationEnabled) {
+            return false;
+        }
+
+        final DefaultDisplay.Info displayInfo = mDefaultDisplay.getInfo();
+        return (mOrientationTouchTransformer.touchInOneHandedModeRegion(ev)
+                && displayInfo.rotation != Surface.ROTATION_90
+                && displayInfo.rotation != Surface.ROTATION_270
+                && displayInfo.metrics.densityDpi < DisplayMetrics.DENSITY_600);
+    }
+
+    public boolean isOneHandedModeEnabled() {
+        return mIsOneHandedModeEnabled;
+    }
+
+    public boolean isSwipeToNotificationEnabled() {
+        return mIsSwipeToNotificationEnabled;
+    }
+
+    /**
      * *May* apply a transform on the motion event if it lies in the nav bar region for another
      * orientation that is currently being tracked as a part of quickstep
      */
@@ -729,6 +802,8 @@
         pw.println("  currentActiveRotation=" + getCurrentActiveRotation());
         pw.println("  displayRotation=" + getDisplayRotation());
         pw.println("  isUserUnlocked=" + mIsUserUnlocked);
+        pw.println("  isOneHandedModeEnabled=" + mIsOneHandedModeEnabled);
+        pw.println("  isSwipeToNotificationEnabled=" + mIsSwipeToNotificationEnabled);
         mOrientationTouchTransformer.dump(pw);
     }
 }
diff --git a/quickstep/src/com/android/quickstep/SysUINavigationMode.java b/quickstep/src/com/android/quickstep/SysUINavigationMode.java
index 05ce2a2..6994d66 100644
--- a/quickstep/src/com/android/quickstep/SysUINavigationMode.java
+++ b/quickstep/src/com/android/quickstep/SysUINavigationMode.java
@@ -16,14 +16,15 @@
 
 package com.android.quickstep;
 
+import static com.android.launcher3.ResourceUtils.INVALID_RESOURCE_HANDLE;
 import static com.android.launcher3.util.PackageManagerHelper.getPackageFilter;
 
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
-import android.content.res.Resources;
 import android.util.Log;
 
+import com.android.launcher3.ResourceUtils;
 import com.android.launcher3.touch.PagedOrientationHandler;
 import com.android.launcher3.util.MainThreadInitializedObject;
 
@@ -58,15 +59,19 @@
             new MainThreadInitializedObject<>(SysUINavigationMode::new);
 
     private static final String TAG = "SysUINavigationMode";
-
     private static final String ACTION_OVERLAY_CHANGED = "android.intent.action.OVERLAY_CHANGED";
     private static final String NAV_BAR_INTERACTION_MODE_RES_NAME =
             "config_navBarInteractionMode";
+    private static final String TARGET_OVERLAY_PACKAGE = "android";
 
     private final Context mContext;
     private Mode mMode;
 
+    private int mNavBarGesturalHeight;
+
     private final List<NavigationModeChangeListener> mChangeListeners = new ArrayList<>();
+    private final List<OneHandedModeChangeListener> mOneHandedOverlayChangeListeners =
+            new ArrayList<>();
 
     public SysUINavigationMode(Context context) {
         mContext = context;
@@ -76,8 +81,9 @@
             @Override
             public void onReceive(Context context, Intent intent) {
                 updateMode();
+                updateGesturalHeight();
             }
-        }, getPackageFilter("android", ACTION_OVERLAY_CHANGED));
+        }, getPackageFilter(TARGET_OVERLAY_PACKAGE, ACTION_OVERLAY_CHANGED));
     }
 
     /** Updates navigation mode when needed. */
@@ -89,9 +95,35 @@
         }
     }
 
+    private void updateGesturalHeight() {
+        int newGesturalHeight = ResourceUtils.getDimenByName(
+                ResourceUtils.NAVBAR_BOTTOM_GESTURE_SIZE, mContext.getResources(),
+                INVALID_RESOURCE_HANDLE);
+
+        if (newGesturalHeight == INVALID_RESOURCE_HANDLE) {
+            Log.e(TAG, "Failed to get system resource ID. Incompatible framework version?");
+            return;
+        }
+
+        if (mNavBarGesturalHeight != newGesturalHeight) {
+            mNavBarGesturalHeight = newGesturalHeight;
+            dispatchOneHandedOverlayChange();
+        }
+    }
+
     private void initializeMode() {
-        int modeInt = getSystemIntegerRes(mContext, NAV_BAR_INTERACTION_MODE_RES_NAME);
-        for(Mode m : Mode.values()) {
+        int modeInt = ResourceUtils.getIntegerByName(NAV_BAR_INTERACTION_MODE_RES_NAME,
+                mContext.getResources(), INVALID_RESOURCE_HANDLE);
+        mNavBarGesturalHeight = ResourceUtils.getDimenByName(
+                ResourceUtils.NAVBAR_BOTTOM_GESTURE_SIZE, mContext.getResources(),
+                INVALID_RESOURCE_HANDLE);
+
+        if (modeInt == INVALID_RESOURCE_HANDLE) {
+            Log.e(TAG, "Failed to get system resource ID. Incompatible framework version?");
+            return;
+        }
+
+        for (Mode m : Mode.values()) {
             if (m.resValue == modeInt) {
                 mMode = m;
             }
@@ -104,6 +136,12 @@
         }
     }
 
+    private void dispatchOneHandedOverlayChange() {
+        for (OneHandedModeChangeListener listener : mOneHandedOverlayChangeListeners) {
+            listener.onOneHandedModeChanged(mNavBarGesturalHeight);
+        }
+    }
+
     public Mode addModeChangeListener(NavigationModeChangeListener listener) {
         mChangeListeners.add(listener);
         return mMode;
@@ -113,20 +151,17 @@
         mChangeListeners.remove(listener);
     }
 
-    public Mode getMode() {
-        return mMode;
+    public int addOneHandedOverlayChangeListener(OneHandedModeChangeListener listener) {
+        mOneHandedOverlayChangeListeners.add(listener);
+        return mNavBarGesturalHeight;
     }
 
-    private static int getSystemIntegerRes(Context context, String resName) {
-        Resources res = context.getResources();
-        int resId = res.getIdentifier(resName, "integer", "android");
+    public void removeOneHandedOverlayChangeListener(OneHandedModeChangeListener listener) {
+        mOneHandedOverlayChangeListeners.remove(listener);
+    }
 
-        if (resId != 0) {
-            return res.getInteger(resId);
-        } else {
-            Log.e(TAG, "Failed to get system resource ID. Incompatible framework version?");
-            return -1;
-        }
+    public Mode getMode() {
+        return mMode;
     }
 
     /** @return Whether we can remove the shelf from overview. */
@@ -144,10 +179,16 @@
     public void dump(PrintWriter pw) {
         pw.println("SysUINavigationMode:");
         pw.println("  mode=" + mMode.name());
+        pw.println("  mNavBarGesturalHeight=:" + mNavBarGesturalHeight);
     }
 
     public interface NavigationModeChangeListener {
 
         void onNavigationModeChanged(Mode newMode);
     }
+
+    public interface OneHandedModeChangeListener {
+
+        void onOneHandedModeChanged(int newGesturalHeight);
+    }
 }
\ No newline at end of file
diff --git a/quickstep/src/com/android/quickstep/SystemUiProxy.java b/quickstep/src/com/android/quickstep/SystemUiProxy.java
index 299e9e5..5b239a4 100644
--- a/quickstep/src/com/android/quickstep/SystemUiProxy.java
+++ b/quickstep/src/com/android/quickstep/SystemUiProxy.java
@@ -347,6 +347,28 @@
     }
 
     @Override
+    public void startOneHandedMode() {
+        if (mSystemUiProxy != null) {
+            try {
+                mSystemUiProxy.startOneHandedMode();
+            } catch (RemoteException e) {
+                Log.w(TAG, "Failed call startOneHandedMode", e);
+            }
+        }
+    }
+
+    @Override
+    public void stopOneHandedMode() {
+        if (mSystemUiProxy != null) {
+            try {
+                mSystemUiProxy.stopOneHandedMode();
+            } catch (RemoteException e) {
+                Log.w(TAG, "Failed call stopOneHandedMode", e);
+            }
+        }
+    }
+
+    @Override
     public void handleImageBundleAsScreenshot(Bundle screenImageBundle, Rect locationInScreen,
             Insets visibleInsets, Task.TaskKey task) {
         if (mSystemUiProxy != null) {
@@ -358,4 +380,15 @@
             }
         }
     }
+
+    @Override
+    public void expandNotificationPanel() {
+        if (mSystemUiProxy != null) {
+            try {
+                mSystemUiProxy.expandNotificationPanel();
+            } catch (RemoteException e) {
+                Log.w(TAG, "Failed call expandNotificationPanel", e);
+            }
+        }
+    }
 }
diff --git a/quickstep/tests/src/com/android/quickstep/StartLauncherViaGestureTests.java b/quickstep/tests/src/com/android/quickstep/StartLauncherViaGestureTests.java
index 0c5b9ad..9732cdc 100644
--- a/quickstep/tests/src/com/android/quickstep/StartLauncherViaGestureTests.java
+++ b/quickstep/tests/src/com/android/quickstep/StartLauncherViaGestureTests.java
@@ -102,4 +102,4 @@
         }
         mLauncher.pressHome();
     }
-}
\ No newline at end of file
+}
diff --git a/res/values-rm/strings.xml b/res/values-rm/strings.xml
deleted file mode 100644
index 0758148..0000000
--- a/res/values-rm/strings.xml
+++ /dev/null
@@ -1,203 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!-- 
-/*
-* Copyright (C) 2008 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.
-*/
- -->
-
-<resources xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
-    <!-- no translation found for application_name (5181331383435256801) -->
-    <skip />
-    <!-- no translation found for home (7658288663002113681) -->
-    <skip />
-    <!-- no translation found for uid_name (7820867637514617527) -->
-    <skip />
-    <string name="folder_name" msgid="7371454440695724752"></string>
-    <!-- no translation found for activity_not_found (8071924732094499514) -->
-    <skip />
-    <!-- no translation found for widgets_tab_label (2921133187116603919) -->
-    <skip />
-    <!-- no translation found for widget_adder (3201040140710381657) -->
-    <skip />
-    <!-- no translation found for toggle_weight_watcher (5645299835184636119) -->
-    <skip />
-    <!-- no translation found for long_press_widget_to_add (7699152356777458215) -->
-    <skip />
-    <!-- no translation found for market (2619650989819296998) -->
-    <skip />
-    <!-- no translation found for widget_dims_format (2370757736025621599) -->
-    <skip />
-    <!-- no translation found for external_drop_widget_error (3165821058322217155) -->
-    <skip />
-    <!-- no translation found for external_drop_widget_pick_title (3486317258037690630) -->
-    <skip />
-    <!-- no translation found for rename_folder_label (3727762225964550653) -->
-    <skip />
-    <!-- no translation found for rename_folder_title (3771389277707820891) -->
-    <skip />
-    <!-- no translation found for rename_action (5559600076028658757) -->
-    <skip />
-    <!-- no translation found for cancel_action (7009134900002915310) -->
-    <skip />
-    <!-- no translation found for menu_item_add_item (1264911265836810421) -->
-    <skip />
-    <!-- no translation found for group_applications (3797214114206693605) -->
-    <skip />
-    <!-- no translation found for group_shortcuts (6012256992764410535) -->
-    <skip />
-    <!-- no translation found for group_widgets (1569030723286851002) -->
-    <skip />
-    <!-- no translation found for completely_out_of_space (6106288382070760318) -->
-    <skip />
-    <!-- no translation found for out_of_space (4691004494942118364) -->
-    <skip />
-    <!-- no translation found for hotseat_out_of_space (7448809638125333693) -->
-    <skip />
-    <!-- no translation found for invalid_hotseat_item (5779907847267573691) -->
-    <skip />
-    <!-- no translation found for shortcut_installed (1701742129426969556) -->
-    <skip />
-    <!-- no translation found for shortcut_uninstalled (8176767991305701821) -->
-    <skip />
-    <!-- no translation found for shortcut_duplicate (9167217446062498127) -->
-    <skip />
-    <!-- no translation found for title_select_shortcut (6680642571148153868) -->
-    <skip />
-    <!-- no translation found for title_select_application (3280812711670683644) -->
-    <skip />
-    <!-- no translation found for all_apps_button_label (9110807029020582876) -->
-    <skip />
-    <!-- no translation found for all_apps_home_button_label (252062713717058851) -->
-    <skip />
-    <!-- no translation found for delete_zone_label_workspace (4009607676751398685) -->
-    <skip />
-    <!-- no translation found for delete_zone_label_all_apps (8083826390278958980) -->
-    <skip />
-    <!-- no translation found for delete_target_label (1822697352535677073) -->
-    <skip />
-    <!-- no translation found for delete_target_uninstall_label (5100785476250872595) -->
-    <skip />
-    <!-- no translation found for info_target_label (8053346143994679532) -->
-    <skip />
-    <!-- no translation found for accessibility_search_button (1628520399424565142) -->
-    <skip />
-    <!-- no translation found for accessibility_voice_search_button (4637324840434406584) -->
-    <skip />
-    <!-- no translation found for accessibility_all_apps_button (2603132375383800483) -->
-    <skip />
-    <!-- no translation found for accessibility_delete_button (6466114477993744621) -->
-    <skip />
-    <!-- no translation found for delete_zone_label_all_apps_system_app (449755632749610895) -->
-    <skip />
-    <!-- no translation found for cab_menu_delete_app (7435191475867183689) -->
-    <skip />
-    <!-- no translation found for cab_menu_app_info (8593722221450362342) -->
-    <skip />
-    <!-- no translation found for cab_app_selection_text (374688303047985416) -->
-    <skip />
-    <!-- no translation found for cab_widget_selection_text (1833458597831541241) -->
-    <skip />
-    <!-- no translation found for cab_folder_selection_text (7999992513806132118) -->
-    <skip />
-    <!-- no translation found for cab_shortcut_selection_text (2103811025667946450) -->
-    <skip />
-    <!-- no translation found for permlab_install_shortcut (5632423390354674437) -->
-    <skip />
-    <!-- no translation found for permdesc_install_shortcut (923466509822011139) -->
-    <skip />
-    <!-- no translation found for permlab_uninstall_shortcut (864595034498083837) -->
-    <skip />
-    <!-- no translation found for permdesc_uninstall_shortcut (5134129545001836849) -->
-    <skip />
-    <!-- no translation found for permlab_read_settings (1941457408239617576) -->
-    <skip />
-    <!-- no translation found for permdesc_read_settings (5833423719057558387) -->
-    <skip />
-    <!-- no translation found for permlab_write_settings (3574213698004620587) -->
-    <skip />
-    <!-- no translation found for permdesc_write_settings (5440712911516509985) -->
-    <skip />
-    <!-- no translation found for gadget_error_text (6081085226050792095) -->
-    <skip />
-    <!-- no translation found for uninstall_system_app_text (4172046090762920660) -->
-    <skip />
-    <!-- no translation found for dream_name (1530253749244328964) -->
-    <skip />
-    <!-- no translation found for folder_hint_text (6617836969016293992) -->
-    <skip />
-    <!-- no translation found for workspace_description_format (2950174241104043327) -->
-    <skip />
-    <!-- no translation found for default_scroll_format (7475544710230993317) -->
-    <skip />
-    <!-- no translation found for workspace_scroll_format (8458889198184077399) -->
-    <skip />
-    <!-- no translation found for apps_customize_apps_scroll_format (370005296147130238) -->
-    <skip />
-    <!-- no translation found for apps_customize_widgets_scroll_format (3106209519974971521) -->
-    <skip />
-    <!-- no translation found for first_run_cling_title (2459738000155917941) -->
-    <skip />
-    <!-- no translation found for first_run_cling_description (6447072552696253358) -->
-    <skip />
-    <!-- no translation found for first_run_cling_create_screens_hint (6950729526680114157) -->
-    <skip />
-    <!-- no translation found for migration_cling_title (9181776667882933767) -->
-    <skip />
-    <!-- no translation found for migration_cling_description (2752413805582227644) -->
-    <skip />
-    <!-- no translation found for migration_cling_copy_apps (946331230090919440) -->
-    <skip />
-    <!-- no translation found for migration_cling_use_default (2626475813981258626) -->
-    <skip />
-    <!-- no translation found for workspace_cling_title (5626202359865825661) -->
-    <skip />
-    <!-- no translation found for workspace_cling_move_item (528201129978005352) -->
-    <skip />
-    <!-- no translation found for folder_cling_title (3894908818693254164) -->
-    <skip />
-    <!-- no translation found for folder_cling_create_folder (6158215559475836131) -->
-    <skip />
-    <!-- no translation found for cling_dismiss (8962359497601507581) -->
-    <skip />
-    <!-- no translation found for folder_opened (94695026776264709) -->
-    <skip />
-    <!-- no translation found for folder_tap_to_close (1884479294466410023) -->
-    <skip />
-    <!-- no translation found for folder_tap_to_rename (9191075570492871147) -->
-    <skip />
-    <!-- no translation found for folder_closed (4100806530910930934) -->
-    <skip />
-    <!-- no translation found for folder_renamed (1794088362165669656) -->
-    <skip />
-    <!-- no translation found for folder_name_format (6629239338071103179) -->
-    <skip />
-    <!-- no translation found for widget_button_text (2880537293434387943) -->
-    <skip />
-    <!-- no translation found for wallpaper_button_text (8404103075899945851) -->
-    <skip />
-    <!-- no translation found for settings_button_text (8119458837558863227) -->
-    <skip />
-    <!-- no translation found for package_state_enqueued (6227252464303085641) -->
-    <skip />
-    <!-- no translation found for package_state_downloading (4088770468458724721) -->
-    <skip />
-    <!-- no translation found for package_state_installing (7588193972189849870) -->
-    <skip />
-    <!-- no translation found for package_state_unknown (7592128424511031410) -->
-    <skip />
-    <!-- no translation found for package_state_error (7672093962724223588) -->
-    <skip />
-</resources>
diff --git a/src/com/android/launcher3/ResourceUtils.java b/src/com/android/launcher3/ResourceUtils.java
index 403d779..c9fb75a 100644
--- a/src/com/android/launcher3/ResourceUtils.java
+++ b/src/com/android/launcher3/ResourceUtils.java
@@ -22,6 +22,7 @@
 
 public class ResourceUtils {
     public static final int DEFAULT_NAVBAR_VALUE = 48;
+    public static final int INVALID_RESOURCE_HANDLE = -1;
     public static final String NAVBAR_LANDSCAPE_LEFT_RIGHT_SIZE = "navigation_bar_width";
     public static final String NAVBAR_BOTTOM_GESTURE_SIZE = "navigation_bar_gesture_height";
 
@@ -51,7 +52,13 @@
         return val;
     }
 
+    public static int getIntegerByName(String resName, Resources res, int defaultValue) {
+        int resId = res.getIdentifier(resName, "integer", "android");
+        return resId != 0 ? res.getInteger(resId) : defaultValue;
+    }
+
     public static int pxFromDp(float size, DisplayMetrics metrics) {
-        return Math.round(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, size, metrics));
+        return size < 0 ? INVALID_RESOURCE_HANDLE : Math.round(
+                TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, size, metrics));
     }
 }
diff --git a/src/com/android/launcher3/util/SecureSettingsObserver.java b/src/com/android/launcher3/util/SecureSettingsObserver.java
index 48aa02b..4b22429 100644
--- a/src/com/android/launcher3/util/SecureSettingsObserver.java
+++ b/src/com/android/launcher3/util/SecureSettingsObserver.java
@@ -29,6 +29,11 @@
 
     /** Hidden field Settings.Secure.NOTIFICATION_BADGING */
     public static final String NOTIFICATION_BADGING = "notification_badging";
+    /** Hidden field Settings.Secure.ONE_HANDED_MODE_ENABLED */
+    public static final String ONE_HANDED_ENABLED = "one_handed_mode_enabled";
+    /** Hidden field Settings.Secure.SWIPE_BOTTOM_TO_NOTIFICATION_ENABLED */
+    public static final String ONE_HANDED_SWIPE_BOTTOM_TO_NOTIFICATION_ENABLED =
+            "swipe_bottom_to_notification_enabled";
 
     private final ContentResolver mResolver;
     private final String mKeySetting;
@@ -79,4 +84,21 @@
         return new SecureSettingsObserver(
                 context.getContentResolver(), listener, NOTIFICATION_BADGING, 1);
     }
+
+    public static SecureSettingsObserver newOneHandedSettingsObserver(Context context,
+            OnChangeListener listener) {
+        return new SecureSettingsObserver(
+                context.getContentResolver(), listener, ONE_HANDED_ENABLED, 1);
+    }
+
+    /**
+     * Constructs settings observer for {@link #ONE_HANDED_SWIPE_BOTTOM_TO_NOTIFICATION_ENABLED}
+     * preference.
+     */
+    public static SecureSettingsObserver newSwipeToNotificationSettingsObserver(Context context,
+            OnChangeListener listener) {
+        return new SecureSettingsObserver(
+                context.getContentResolver(), listener,
+                ONE_HANDED_SWIPE_BOTTOM_TO_NOTIFICATION_ENABLED, 1);
+    }
 }
diff --git a/tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java b/tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java
index 0cf611a..bf079cb 100644
--- a/tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java
+++ b/tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java
@@ -1397,4 +1397,4 @@
             return null;
         }
     }
-}
\ No newline at end of file
+}