diff --git a/core/java/com/android/internal/widget/ButtonBarLayout.java b/core/java/com/android/internal/widget/ButtonBarLayout.java
index 39613e852d38c..3b7bce47e5ab8 100644
--- a/core/java/com/android/internal/widget/ButtonBarLayout.java
+++ b/core/java/com/android/internal/widget/ButtonBarLayout.java
@@ -31,7 +31,7 @@ import com.android.internal.R;
  */
 public class ButtonBarLayout extends LinearLayout {
     /** Whether the current configuration allows stacking. */
-    private final boolean mAllowStacking;
+    private boolean mAllowStacking;
 
     private int mLastWidthSize = -1;
 
@@ -43,6 +43,16 @@ public class ButtonBarLayout extends LinearLayout {
         ta.recycle();
     }
 
+    public void setAllowStacking(boolean allowStacking) {
+        if (mAllowStacking != allowStacking) {
+            mAllowStacking = allowStacking;
+            if (!mAllowStacking && getOrientation() == LinearLayout.VERTICAL) {
+                setStacked(false);
+            }
+            requestLayout();
+        }
+    }
+
     @Override
     protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
         final int widthSize = MeasureSpec.getSize(widthMeasureSpec);
diff --git a/core/res/res/values/symbols.xml b/core/res/res/values/symbols.xml
index e6f54eecd8668..483f83018f668 100755
--- a/core/res/res/values/symbols.xml
+++ b/core/res/res/values/symbols.xml
@@ -2315,4 +2315,6 @@
   <java-symbol type="plurals" name="selected_count" />
   <java-symbol type="drawable" name="ic_dialog_alert_material" />
 
+  <java-symbol type="bool" name="allow_stacked_button_bar" />
+
 </resources>