1 files changed, 11 insertions, 0 deletions
diff --git a/com/android/server/wm/RootWindowContainer.java b/com/android/server/wm/RootWindowContainer.java
index fd574709..7832f5de 100644
--- a/com/android/server/wm/RootWindowContainer.java
+++ b/com/android/server/wm/RootWindowContainer.java
@@ -411,6 +411,17 @@ class RootWindowContainer extends WindowContainer<DisplayContent> {
         }
     }
 
+    TaskStack getStackById(int stackId) {
+        for (int i = mChildren.size() - 1; i >= 0; i--) {
+            final DisplayContent dc = mChildren.get(i);
+            final TaskStack stack = dc.getStackById(stackId);
+            if (stack != null) {
+                return stack;
+            }
+        }
+        return null;
+    }
+
     TaskStack getStack(int windowingMode, int activityType) {
         for (int i = mChildren.size() - 1; i >= 0; i--) {
             final DisplayContent dc = mChildren.get(i);