2 files changed, 20 insertions, 0 deletions
diff --git a/services/core/java/com/android/server/wm/TaskLaunchParamsModifier.java b/services/core/java/com/android/server/wm/TaskLaunchParamsModifier.java
index 14585c531203..19fbfedfc251 100644
--- a/services/core/java/com/android/server/wm/TaskLaunchParamsModifier.java
+++ b/services/core/java/com/android/server/wm/TaskLaunchParamsModifier.java
@@ -292,6 +292,10 @@ class TaskLaunchParamsModifier implements LaunchParamsModifier {
 
     private int getPreferredLaunchDisplay(@Nullable TaskRecord task,
             @Nullable ActivityOptions options, ActivityRecord source, LaunchParams currentParams) {
+        if (!mSupervisor.mService.mSupportsMultiDisplay) {
+            return DEFAULT_DISPLAY;
+        }
+
         int displayId = INVALID_DISPLAY;
         final int optionLaunchId = options != null ? options.getLaunchDisplayId() : INVALID_DISPLAY;
         if (optionLaunchId != INVALID_DISPLAY) {
diff --git a/services/tests/wmtests/src/com/android/server/wm/TaskLaunchParamsModifierTests.java b/services/tests/wmtests/src/com/android/server/wm/TaskLaunchParamsModifierTests.java
index f918149e6781..58614c650363 100644
--- a/services/tests/wmtests/src/com/android/server/wm/TaskLaunchParamsModifierTests.java
+++ b/services/tests/wmtests/src/com/android/server/wm/TaskLaunchParamsModifierTests.java
@@ -1225,6 +1225,22 @@ public class TaskLaunchParamsModifierTests extends ActivityTestsBase {
         assertEquals(startingBounds, adjustedBounds);
     }
 
+    @Test
+    public void testNoMultiDisplaySupports() {
+        final boolean orgValue = mService.mSupportsMultiDisplay;
+        final TestActivityDisplay display = createNewActivityDisplay(WINDOWING_MODE_FULLSCREEN);
+        mCurrent.mPreferredDisplayId = display.mDisplayId;
+
+        try {
+            mService.mSupportsMultiDisplay = false;
+            assertEquals(RESULT_CONTINUE, mTarget.onCalculate(/* task */ null, /* layout */ null,
+                    mActivity, /* source */ null, /* options */ null, mCurrent, mResult));
+            assertEquals(DEFAULT_DISPLAY, mResult.mPreferredDisplayId);
+        } finally {
+            mService.mSupportsMultiDisplay = orgValue;
+        }
+    }
+
     private TestActivityDisplay createNewActivityDisplay(int windowingMode) {
         final TestActivityDisplay display = addNewActivityDisplayAt(ActivityDisplay.POSITION_TOP);
         display.setWindowingMode(windowingMode);