diff --git a/core/java/android/app/ActivityManager.java b/core/java/android/app/ActivityManager.java
index eeae20f..9ef51c8 100644
--- a/core/java/android/app/ActivityManager.java
+++ b/core/java/android/app/ActivityManager.java
@@ -452,6 +452,22 @@
      */
     public static final int FIRST_DYNAMIC_STACK_ID = LAST_STATIC_STACK_ID + 1;
 
+    /**
+     * Input parameter to {@link android.app.IActivityManager#moveTaskToDockedStack} which
+     * specifies the position of the created docked stack at the top half of the screen if
+     * in portrait mode or at the left half of the screen if in landscape mode.
+     * @hide
+     */
+    public static final int DOCKED_STACK_CREATE_MODE_TOP_OR_LEFT = 0;
+
+    /**
+     * Input parameter to {@link android.app.IActivityManager#moveTaskToDockedStack} which
+     * specifies the position of the created docked stack at the bottom half of the screen if
+     * in portrait mode or at the right half of the screen if in landscape mode.
+     * @hide
+     */
+    public static final int DOCKED_STACK_CREATE_MODE_BOTTOM_OR_RIGHT = 1;
+
     /** @hide */
     public int getFrontActivityScreenCompatMode() {
         try {
diff --git a/core/java/android/app/ActivityManagerNative.java b/core/java/android/app/ActivityManagerNative.java
index d1c73bc..d79716c 100644
--- a/core/java/android/app/ActivityManagerNative.java
+++ b/core/java/android/app/ActivityManagerNative.java
@@ -743,6 +743,16 @@
             return true;
         }
 
+        case MOVE_TASK_TO_DOCKED_STACK_TRANSACTION: {
+            data.enforceInterface(IActivityManager.descriptor);
+            int taskId = data.readInt();
+            int createMode = data.readInt();
+            boolean toTop = data.readInt() != 0;
+            moveTaskToDockedStack(taskId, createMode, toTop);
+            reply.writeNoException();
+            return true;
+        }
+
         case RESIZE_STACK_TRANSACTION: {
             data.enforceInterface(IActivityManager.descriptor);
             int stackId = data.readInt();
@@ -3510,6 +3520,21 @@
         reply.recycle();
     }
     @Override
+    public void moveTaskToDockedStack(int taskId, int createMode, boolean toTop)
+            throws RemoteException
+    {
+        Parcel data = Parcel.obtain();
+        Parcel reply = Parcel.obtain();
+        data.writeInterfaceToken(IActivityManager.descriptor);
+        data.writeInt(taskId);
+        data.writeInt(createMode);
+        data.writeInt(toTop ? 1 : 0);
+        mRemote.transact(MOVE_TASK_TO_DOCKED_STACK_TRANSACTION, data, reply, 0);
+        reply.readException();
+        data.recycle();
+        reply.recycle();
+    }
+    @Override
     public void resizeStack(int stackId, Rect r) throws RemoteException
     {
         Parcel data = Parcel.obtain();
diff --git a/core/java/android/app/IActivityManager.java b/core/java/android/app/IActivityManager.java
index 66fa796..3b30d71 100644
--- a/core/java/android/app/IActivityManager.java
+++ b/core/java/android/app/IActivityManager.java
@@ -140,6 +140,8 @@
     public boolean moveActivityTaskToBack(IBinder token, boolean nonRoot) throws RemoteException;
     public void moveTaskBackwards(int task) throws RemoteException;
     public void moveTaskToStack(int taskId, int stackId, boolean toTop) throws RemoteException;
+    public void moveTaskToDockedStack(int taskId, int createMode, boolean toTop)
+            throws RemoteException;
     public void resizeStack(int stackId, Rect bounds) throws RemoteException;
     public void positionTaskInStack(int taskId, int stackId, int position) throws RemoteException;
     public List<StackInfo> getAllStackInfos() throws RemoteException;
@@ -888,4 +890,5 @@
     int GET_ACTIVITY_STACK_ID_TRANSACTION = IBinder.FIRST_CALL_TRANSACTION + 343;
     int MOVE_ACTIVITY_TO_STACK_TRANSACTION = IBinder.FIRST_CALL_TRANSACTION + 344;
     int REPORT_SIZE_CONFIGURATIONS = IBinder.FIRST_CALL_TRANSACTION + 345;
+    int MOVE_TASK_TO_DOCKED_STACK_TRANSACTION = IBinder.FIRST_CALL_TRANSACTION + 346;
 }
diff --git a/services/core/java/com/android/server/am/ActivityManagerService.java b/services/core/java/com/android/server/am/ActivityManagerService.java
index 14376d1..dc6f3d6 100644
--- a/services/core/java/com/android/server/am/ActivityManagerService.java
+++ b/services/core/java/com/android/server/am/ActivityManagerService.java
@@ -19,7 +19,6 @@
 import static android.Manifest.permission.INTERACT_ACROSS_USERS;
 import static android.Manifest.permission.INTERACT_ACROSS_USERS_FULL;
 import static android.Manifest.permission.START_TASKS_FROM_RECENTS;
-import static android.app.ActivityManager.FREEFORM_WORKSPACE_STACK_ID;
 import static android.app.ActivityManager.DOCKED_STACK_ID;
 import static android.app.ActivityManager.HOME_STACK_ID;
 import static android.app.ActivityManager.INVALID_STACK_ID;
@@ -215,7 +214,6 @@
 import android.os.StrictMode;
 import android.os.SystemClock;
 import android.os.SystemProperties;
-import android.os.Trace;
 import android.os.UpdateLock;
 import android.os.UserHandle;
 import android.os.UserManager;
@@ -9053,6 +9051,35 @@
         }
     }
 
+    /**
+     * Moves the input task to the docked stack.
+     *
+     * @param taskId Id of task to move.
+     * @param createMode The mode the docked stack should be created in if it doesn't exist
+     *                   already. See
+     *                   {@link android.app.ActivityManager#DOCKED_STACK_CREATE_MODE_TOP_OR_LEFT}
+     *                   and
+     *                   {@link android.app.ActivityManager#DOCKED_STACK_CREATE_MODE_BOTTOM_OR_RIGHT}
+     * @param toTop If the task and stack should be moved to the top.
+     */
+    @Override
+    public void moveTaskToDockedStack(int taskId, int createMode, boolean toTop) {
+        enforceCallingPermission(android.Manifest.permission.MANAGE_ACTIVITY_STACKS,
+                "moveTaskToDockedStack()");
+        synchronized (this) {
+            long ident = Binder.clearCallingIdentity();
+            try {
+                if (DEBUG_STACK) Slog.d(TAG_STACK, "moveTaskToDockedStack: moving task=" + taskId
+                        + " to createMode=" + createMode + " toTop=" + toTop);
+                mWindowManager.setDockedStackCreateMode(createMode);
+                mStackSupervisor.moveTaskToStackLocked(
+                        taskId, DOCKED_STACK_ID, toTop, !FORCE_FOCUS);
+            } finally {
+                Binder.restoreCallingIdentity(ident);
+            }
+        }
+    }
+
     @Override
     public void resizeStack(int stackId, Rect bounds) {
         enforceCallingPermission(android.Manifest.permission.MANAGE_ACTIVITY_STACKS,
diff --git a/services/core/java/com/android/server/wm/TaskPositioner.java b/services/core/java/com/android/server/wm/TaskPositioner.java
index 7901bee..876e9aa 100644
--- a/services/core/java/com/android/server/wm/TaskPositioner.java
+++ b/services/core/java/com/android/server/wm/TaskPositioner.java
@@ -16,8 +16,9 @@
 
 package com.android.server.wm;
 
+import static android.app.ActivityManager.DOCKED_STACK_CREATE_MODE_BOTTOM_OR_RIGHT;
+import static android.app.ActivityManager.DOCKED_STACK_CREATE_MODE_TOP_OR_LEFT;
 import static android.app.ActivityManager.FREEFORM_WORKSPACE_STACK_ID;
-import static android.app.ActivityManager.DOCKED_STACK_ID;
 import static android.content.res.Configuration.ORIENTATION_LANDSCAPE;
 import static com.android.server.wm.WindowManagerService.DEBUG_TASK_POSITIONING;
 import static com.android.server.wm.WindowManagerService.SHOW_TRANSACTIONS;
@@ -154,8 +155,11 @@
                     // event handler for the last finishInputEvent()!
                     mService.mH.sendEmptyMessage(H.FINISH_TASK_POSITIONING);
                     if (mCurrentDimSide != CTRL_NONE) {
-                        mService.mActivityManager.moveTaskToStack(
-                                mTaskId, DOCKED_STACK_ID, true /*toTop*/);
+                        final int createMode = mCurrentDimSide == CTRL_LEFT
+                                ? DOCKED_STACK_CREATE_MODE_TOP_OR_LEFT
+                                : DOCKED_STACK_CREATE_MODE_BOTTOM_OR_RIGHT;
+                        mService.mActivityManager.moveTaskToDockedStack(
+                                mTaskId, createMode, true /*toTop*/);
                     }
                 }
                 handled = true;
diff --git a/services/core/java/com/android/server/wm/TaskStack.java b/services/core/java/com/android/server/wm/TaskStack.java
index ae3bb9b..1e6fab6 100644
--- a/services/core/java/com/android/server/wm/TaskStack.java
+++ b/services/core/java/com/android/server/wm/TaskStack.java
@@ -353,11 +353,13 @@
     private static void getInitialDockedStackBounds(
             Rect displayRect, Rect outBounds, int stackId) {
         // Docked stack start off occupying half the screen space.
-        // TODO(multi-window): Need to support the selecting which half of the screen the
-        // docked stack uses for snapping windows to the edge of the screen.
         final boolean splitHorizontally = displayRect.width() > displayRect.height();
+        final boolean topOrLeftCreateMode =
+                WindowManagerService.sDockedStackCreateMode == DOCKED_STACK_CREATE_MODE_TOP_OR_LEFT;
+        final boolean placeTopOrLeft = (stackId == DOCKED_STACK_ID && topOrLeftCreateMode)
+                || (stackId != DOCKED_STACK_ID && !topOrLeftCreateMode);
         outBounds.set(displayRect);
-        if (stackId == DOCKED_STACK_ID) {
+        if (placeTopOrLeft) {
             if (splitHorizontally) {
                 outBounds.right = displayRect.centerX();
             } else {
diff --git a/services/core/java/com/android/server/wm/WindowManagerService.java b/services/core/java/com/android/server/wm/WindowManagerService.java
index 69440b8..8719ddb 100644
--- a/services/core/java/com/android/server/wm/WindowManagerService.java
+++ b/services/core/java/com/android/server/wm/WindowManagerService.java
@@ -16,6 +16,34 @@
 
 package com.android.server.wm;
 
+import static android.app.ActivityManager.DOCKED_STACK_CREATE_MODE_TOP_OR_LEFT;
+import static android.view.WindowManager.LayoutParams.FIRST_APPLICATION_WINDOW;
+import static android.view.WindowManager.LayoutParams.FIRST_SUB_WINDOW;
+import static android.view.WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM;
+import static android.view.WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
+import static android.view.WindowManager.LayoutParams.FLAG_SECURE;
+import static android.view.WindowManager.LayoutParams.FLAG_SHOW_WALLPAPER;
+import static android.view.WindowManager.LayoutParams.LAST_APPLICATION_WINDOW;
+import static android.view.WindowManager.LayoutParams.LAST_SUB_WINDOW;
+import static android.view.WindowManager.LayoutParams.PRIVATE_FLAG_COMPATIBLE_WINDOW;
+import static android.view.WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE;
+import static android.view.WindowManager.LayoutParams.SOFT_INPUT_MASK_ADJUST;
+import static android.view.WindowManager.LayoutParams.TYPE_ACCESSIBILITY_OVERLAY;
+import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION;
+import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION_STARTING;
+import static android.view.WindowManager.LayoutParams.TYPE_BASE_APPLICATION;
+import static android.view.WindowManager.LayoutParams.TYPE_BOOT_PROGRESS;
+import static android.view.WindowManager.LayoutParams.TYPE_DREAM;
+import static android.view.WindowManager.LayoutParams.TYPE_INPUT_METHOD;
+import static android.view.WindowManager.LayoutParams.TYPE_INPUT_METHOD_DIALOG;
+import static android.view.WindowManager.LayoutParams.TYPE_PRIVATE_PRESENTATION;
+import static android.view.WindowManager.LayoutParams.TYPE_STATUS_BAR;
+import static android.view.WindowManager.LayoutParams.TYPE_VOICE_INTERACTION;
+import static android.view.WindowManager.LayoutParams.TYPE_WALLPAPER;
+import static android.view.WindowManagerPolicy.FINISH_LAYOUT_REDO_WALLPAPER;
+
+import static com.android.server.wm.WindowState.BOUNDS_FOR_TOUCH;
+
 import android.Manifest;
 import android.animation.ValueAnimator;
 import android.app.ActivityManagerNative;
@@ -110,9 +138,7 @@
 import android.view.WindowManagerPolicy.PointerEventListener;
 import android.view.animation.Animation;
 
-import static com.android.server.wm.WindowState.BOUNDS_FOR_TOUCH;
 import com.android.internal.app.IAssistScreenshotReceiver;
-import com.android.internal.app.IBatteryStats;
 import com.android.internal.util.FastPrintWriter;
 import com.android.internal.view.IInputContext;
 import com.android.internal.view.IInputMethodClient;
@@ -149,31 +175,6 @@
 import java.util.Iterator;
 import java.util.List;
 
-import static android.view.WindowManager.LayoutParams.FIRST_APPLICATION_WINDOW;
-import static android.view.WindowManager.LayoutParams.FIRST_SUB_WINDOW;
-import static android.view.WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM;
-import static android.view.WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
-import static android.view.WindowManager.LayoutParams.FLAG_SECURE;
-import static android.view.WindowManager.LayoutParams.FLAG_SHOW_WALLPAPER;
-import static android.view.WindowManager.LayoutParams.LAST_APPLICATION_WINDOW;
-import static android.view.WindowManager.LayoutParams.LAST_SUB_WINDOW;
-import static android.view.WindowManager.LayoutParams.PRIVATE_FLAG_COMPATIBLE_WINDOW;
-import static android.view.WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE;
-import static android.view.WindowManager.LayoutParams.SOFT_INPUT_MASK_ADJUST;
-import static android.view.WindowManager.LayoutParams.TYPE_ACCESSIBILITY_OVERLAY;
-import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION;
-import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION_STARTING;
-import static android.view.WindowManager.LayoutParams.TYPE_BASE_APPLICATION;
-import static android.view.WindowManager.LayoutParams.TYPE_BOOT_PROGRESS;
-import static android.view.WindowManager.LayoutParams.TYPE_DREAM;
-import static android.view.WindowManager.LayoutParams.TYPE_INPUT_METHOD;
-import static android.view.WindowManager.LayoutParams.TYPE_INPUT_METHOD_DIALOG;
-import static android.view.WindowManager.LayoutParams.TYPE_PRIVATE_PRESENTATION;
-import static android.view.WindowManager.LayoutParams.TYPE_STATUS_BAR;
-import static android.view.WindowManager.LayoutParams.TYPE_VOICE_INTERACTION;
-import static android.view.WindowManager.LayoutParams.TYPE_WALLPAPER;
-import static android.view.WindowManagerPolicy.FINISH_LAYOUT_REDO_WALLPAPER;
-
 /** {@hide} */
 public class WindowManagerService extends IWindowManager.Stub
         implements Watchdog.Monitor, WindowManagerPolicy.WindowManagerFuncs {
@@ -458,6 +459,8 @@
 
     private boolean mKeyguardWaitingForActivityDrawn;
 
+    static int sDockedStackCreateMode = DOCKED_STACK_CREATE_MODE_TOP_OR_LEFT;
+
     class RotationWatcher {
         IRotationWatcher watcher;
         IBinder.DeathRecipient deathRecipient;
@@ -4448,6 +4451,12 @@
         }
     }
 
+    public void setDockedStackCreateMode(int mode) {
+        synchronized (mWindowMap) {
+            sDockedStackCreateMode = mode;
+        }
+    }
+
     /**
      * Create a new TaskStack and place it on a DisplayContent.
      * @param stackId The unique identifier of the new stack.