diff --git a/core/java/android/app/ActivityManagerNative.java b/core/java/android/app/ActivityManagerNative.java
index c3f57e8..9b08493 100644
--- a/core/java/android/app/ActivityManagerNative.java
+++ b/core/java/android/app/ActivityManagerNative.java
@@ -1530,8 +1530,9 @@
             IBinder resultTo = data.readStrongBinder();
             Bundle options = data.readInt() != 0
                     ? Bundle.CREATOR.createFromParcel(data) : null;
+            int userId = data.readInt();
             int result = startActivities(app, intents, resolvedTypes, resultTo,
-                    options);
+                    options, userId);
             reply.writeNoException();
             reply.writeInt(result);
             return true;
@@ -3708,7 +3709,7 @@
     
     public int startActivities(IApplicationThread caller,
             Intent[] intents, String[] resolvedTypes, IBinder resultTo,
-            Bundle options) throws RemoteException {
+            Bundle options, int userId) throws RemoteException {
         Parcel data = Parcel.obtain();
         Parcel reply = Parcel.obtain();
         data.writeInterfaceToken(IActivityManager.descriptor);
@@ -3722,6 +3723,7 @@
         } else {
             data.writeInt(0);
         }
+        data.writeInt(userId);
         mRemote.transact(START_ACTIVITIES_TRANSACTION, data, reply, 0);
         reply.readException();
         int result = reply.readInt();
diff --git a/core/java/android/app/ContextImpl.java b/core/java/android/app/ContextImpl.java
index a6ec9b6..6df0c37 100644
--- a/core/java/android/app/ContextImpl.java
+++ b/core/java/android/app/ContextImpl.java
@@ -965,6 +965,20 @@
         startActivities(intents, null);
     }
 
+    /** @hide */
+    @Override
+    public void startActivitiesAsUser(Intent[] intents, Bundle options, UserHandle userHandle) {
+        if ((intents[0].getFlags()&Intent.FLAG_ACTIVITY_NEW_TASK) == 0) {
+            throw new AndroidRuntimeException(
+                    "Calling startActivities() from outside of an Activity "
+                    + " context requires the FLAG_ACTIVITY_NEW_TASK flag on first Intent."
+                    + " Is this really what you want?");
+        }
+        mMainThread.getInstrumentation().execStartActivitiesAsUser(
+            getOuterContext(), mMainThread.getApplicationThread(), null,
+            (Activity)null, intents, options, userHandle.getIdentifier());
+    }
+
     @Override
     public void startActivities(Intent[] intents, Bundle options) {
         if ((intents[0].getFlags()&Intent.FLAG_ACTIVITY_NEW_TASK) == 0) {
diff --git a/core/java/android/app/IActivityManager.java b/core/java/android/app/IActivityManager.java
index 2b2679e..9454636 100644
--- a/core/java/android/app/IActivityManager.java
+++ b/core/java/android/app/IActivityManager.java
@@ -311,7 +311,7 @@
 
     public int startActivities(IApplicationThread caller,
             Intent[] intents, String[] resolvedTypes, IBinder resultTo,
-            Bundle options) throws RemoteException;
+            Bundle options, int userId) throws RemoteException;
 
     public int getFrontActivityScreenCompatMode() throws RemoteException;
     public void setFrontActivityScreenCompatMode(int mode) throws RemoteException;
diff --git a/core/java/android/app/Instrumentation.java b/core/java/android/app/Instrumentation.java
index ee4e964..e0856ae 100644
--- a/core/java/android/app/Instrumentation.java
+++ b/core/java/android/app/Instrumentation.java
@@ -1430,6 +1430,21 @@
      */
     public void execStartActivities(Context who, IBinder contextThread,
             IBinder token, Activity target, Intent[] intents, Bundle options) {
+        execStartActivitiesAsUser(who, contextThread, token, target, intents, options,
+                UserHandle.myUserId());
+    }
+
+    /**
+     * Like {@link #execStartActivity(Context, IBinder, IBinder, Activity, Intent, int)},
+     * but accepts an array of activities to be started.  Note that active
+     * {@link ActivityMonitor} objects only match against the first activity in
+     * the array.
+     *
+     * {@hide}
+     */
+    public void execStartActivitiesAsUser(Context who, IBinder contextThread,
+            IBinder token, Activity target, Intent[] intents, Bundle options,
+            int userId) {
         IApplicationThread whoThread = (IApplicationThread) contextThread;
         if (mActivityMonitors != null) {
             synchronized (mSync) {
@@ -1453,7 +1468,8 @@
                 resolvedTypes[i] = intents[i].resolveTypeIfNeeded(who.getContentResolver());
             }
             int result = ActivityManagerNative.getDefault()
-                .startActivities(whoThread, intents, resolvedTypes, token, options);
+                .startActivities(whoThread, intents, resolvedTypes, token, options,
+                        userId);
             checkStartActivityResult(result, intents[0]);
         } catch (RemoteException e) {
         }
diff --git a/core/java/android/app/TaskStackBuilder.java b/core/java/android/app/TaskStackBuilder.java
index cadf5e4..1eee5fd 100644
--- a/core/java/android/app/TaskStackBuilder.java
+++ b/core/java/android/app/TaskStackBuilder.java
@@ -23,6 +23,7 @@
 import android.content.pm.PackageManager;
 import android.content.pm.PackageManager.NameNotFoundException;
 import android.os.Bundle;
+import android.os.UserHandle;
 import android.util.Log;
 
 import java.util.ArrayList;
@@ -205,18 +206,26 @@
 
     /**
      * Start the task stack constructed by this builder.
+     * @hide
+     */
+    public void startActivities(Bundle options, UserHandle userHandle) {
+        if (mIntents.isEmpty()) {
+            throw new IllegalStateException(
+                    "No intents added to TaskStackBuilder; cannot startActivities");
+        }
+
+        mSourceContext.startActivitiesAsUser(getIntents(), options, userHandle);
+    }
+
+    /**
+     * Start the task stack constructed by this builder.
      *
      * @param options Additional options for how the Activity should be started.
      * See {@link android.content.Context#startActivity(Intent, Bundle)
      * Context.startActivity(Intent, Bundle)} for more details.
      */
     public void startActivities(Bundle options) {
-        if (mIntents.isEmpty()) {
-            throw new IllegalStateException(
-                    "No intents added to TaskStackBuilder; cannot startActivities");
-        }
-
-        mSourceContext.startActivities(getIntents(), options);
+        startActivities(options, new UserHandle(UserHandle.myUserId()));
     }
 
     /**
diff --git a/core/java/android/content/Context.java b/core/java/android/content/Context.java
index 9162d29..ac36cf7 100644
--- a/core/java/android/content/Context.java
+++ b/core/java/android/content/Context.java
@@ -974,6 +974,36 @@
     public abstract void startActivities(Intent[] intents, Bundle options);
 
     /**
+     * @hide
+     * Launch multiple new activities.  This is generally the same as calling
+     * {@link #startActivity(Intent)} for the first Intent in the array,
+     * that activity during its creation calling {@link #startActivity(Intent)}
+     * for the second entry, etc.  Note that unlike that approach, generally
+     * none of the activities except the last in the array will be created
+     * at this point, but rather will be created when the user first visits
+     * them (due to pressing back from the activity on top).
+     *
+     * <p>This method throws {@link ActivityNotFoundException}
+     * if there was no Activity found for <em>any</em> given Intent.  In this
+     * case the state of the activity stack is undefined (some Intents in the
+     * list may be on it, some not), so you probably want to avoid such situations.
+     *
+     * @param intents An array of Intents to be started.
+     * @param options Additional options for how the Activity should be started.
+     * @param userHandle The user for whom to launch the activities
+     * See {@link android.content.Context#startActivity(Intent, Bundle)
+     * Context.startActivity(Intent, Bundle)} for more details.
+     *
+     * @throws ActivityNotFoundException
+     *
+     * @see {@link #startActivities(Intent[])}
+     * @see PackageManager#resolveActivity
+     */
+    public void startActivitiesAsUser(Intent[] intents, Bundle options, UserHandle userHandle) {
+        throw new RuntimeException("Not implemented. Must override in a subclass.");
+    }
+
+    /**
      * Same as {@link #startIntentSender(IntentSender, Intent, int, int, int, Bundle)}
      * with no options specified.
      *
diff --git a/core/java/android/content/ContextWrapper.java b/core/java/android/content/ContextWrapper.java
index d824f1e..84ad667 100644
--- a/core/java/android/content/ContextWrapper.java
+++ b/core/java/android/content/ContextWrapper.java
@@ -311,6 +311,12 @@
         mBase.startActivities(intents, options);
     }
 
+    /** @hide */
+    @Override
+    public void startActivitiesAsUser(Intent[] intents, Bundle options, UserHandle userHandle) {
+        mBase.startActivitiesAsUser(intents, options, userHandle);
+    }
+
     @Override
     public void startIntentSender(IntentSender intent,
             Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags)
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/BaseStatusBar.java b/packages/SystemUI/src/com/android/systemui/statusbar/BaseStatusBar.java
index dab6306..8c7c39a 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/BaseStatusBar.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/BaseStatusBar.java
@@ -342,7 +342,8 @@
         Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS,
                 Uri.fromParts("package", packageName, null));
         intent.setComponent(intent.resolveActivity(mContext.getPackageManager()));
-        TaskStackBuilder.create(mContext).addNextIntentWithParentStack(intent).startActivities();
+        TaskStackBuilder.create(mContext).addNextIntentWithParentStack(intent).startActivities(
+                null, UserHandle.CURRENT);
     }
 
     protected View.OnLongClickListener getNotificationLongClicker() {
diff --git a/services/java/com/android/server/am/ActivityManagerService.java b/services/java/com/android/server/am/ActivityManagerService.java
index a21f6d5..c49959d 100644
--- a/services/java/com/android/server/am/ActivityManagerService.java
+++ b/services/java/com/android/server/am/ActivityManagerService.java
@@ -2623,10 +2623,13 @@
     }
 
     public final int startActivities(IApplicationThread caller,
-            Intent[] intents, String[] resolvedTypes, IBinder resultTo, Bundle options) {
+            Intent[] intents, String[] resolvedTypes, IBinder resultTo, Bundle options,
+            int userId) {
         enforceNotIsolatedCaller("startActivities");
+        userId = handleIncomingUserLocked(Binder.getCallingPid(), Binder.getCallingUid(), userId,
+                false, true, "startActivity", null);
         int ret = mMainStack.startActivities(caller, -1, intents, resolvedTypes, resultTo,
-                options, UserHandle.getCallingUserId());
+                options, userId);
         return ret;
     }
 
@@ -12434,7 +12437,7 @@
                 } else {
                     try {
                         ActivityInfo aInfo = AppGlobals.getPackageManager().getActivityInfo(
-                                destIntent.getComponent(), 0, UserHandle.getCallingUserId());
+                                destIntent.getComponent(), 0, srec.userId);
                         int res = mMainStack.startActivityLocked(srec.app.thread, destIntent,
                                 null, aInfo, parent.appToken, null,
                                 0, -1, parent.launchedFromUid, 0, null, true, null);