diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/activityembedding/ActivityEmbeddingAnimationRunner.java b/libs/WindowManager/Shell/src/com/android/wm/shell/activityembedding/ActivityEmbeddingAnimationRunner.java
index 59f120deeb941..4d87c9583f64e 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/activityembedding/ActivityEmbeddingAnimationRunner.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/activityembedding/ActivityEmbeddingAnimationRunner.java
@@ -61,6 +61,9 @@ class ActivityEmbeddingAnimationRunner {
     @VisibleForTesting
     final ActivityEmbeddingAnimationSpec mAnimationSpec;
 
+    @Nullable
+    private Animator mActiveAnimator;
+
     ActivityEmbeddingAnimationRunner(@NonNull Context context,
             @NonNull ActivityEmbeddingController controller) {
         mController = controller;
@@ -75,8 +78,10 @@ class ActivityEmbeddingAnimationRunner {
         // applied to make sure the surface is ready.
         final List<Consumer<SurfaceControl.Transaction>> postStartTransactionCallbacks =
                 new ArrayList<>();
-        final Animator animator = createAnimator(info, startTransaction, finishTransaction,
+        final Animator animator = createAnimator(info, startTransaction,
+                finishTransaction,
                 () -> mController.onAnimationFinished(transition), postStartTransactionCallbacks);
+        mActiveAnimator = animator;
 
         // Start the animation.
         if (!postStartTransactionCallbacks.isEmpty()) {
@@ -98,6 +103,17 @@ class ActivityEmbeddingAnimationRunner {
         }
     }
 
+    void cancelAnimationFromMerge() {
+        if (mActiveAnimator == null) {
+            Log.e(TAG,
+                    "No active ActivityEmbedding animator running but mergeAnimation is "
+                            + "trying to cancel one."
+            );
+            return;
+        }
+        mActiveAnimator.end();
+    }
+
     /**
      * Sets transition animation scale settings value.
      * @param scale The setting value of transition animation scale.
@@ -153,6 +169,7 @@ class ActivityEmbeddingAnimationRunner {
                     adapter.onAnimationEnd(t);
                 }
                 t.apply();
+                mActiveAnimator = null;
                 animationFinishCallback.run();
             }
 
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/activityembedding/ActivityEmbeddingController.java b/libs/WindowManager/Shell/src/com/android/wm/shell/activityembedding/ActivityEmbeddingController.java
index bfbddbbe4aa00..fbdbd3e61d926 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/activityembedding/ActivityEmbeddingController.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/activityembedding/ActivityEmbeddingController.java
@@ -118,6 +118,13 @@ public class ActivityEmbeddingController implements Transitions.TransitionHandle
         return true;
     }
 
+    @Override
+    public void mergeAnimation(@NonNull IBinder transition, @NonNull TransitionInfo info,
+            @NonNull SurfaceControl.Transaction t, @NonNull IBinder mergeTarget,
+            @NonNull Transitions.TransitionFinishCallback finishCallback) {
+        mAnimationRunner.cancelAnimationFromMerge();
+    }
+
     private boolean handleNonEmbeddedChanges(List<TransitionInfo.Change> changes) {
         final Rect nonClosingEmbeddedArea = new Rect();
         for (int i = changes.size() - 1; i >= 0; i--) {
diff --git a/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/activityembedding/ActivityEmbeddingAnimationRunnerTests.java b/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/activityembedding/ActivityEmbeddingAnimationRunnerTests.java
index a625346e69c0d..4fca8b46a069a 100644
--- a/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/activityembedding/ActivityEmbeddingAnimationRunnerTests.java
+++ b/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/activityembedding/ActivityEmbeddingAnimationRunnerTests.java
@@ -65,12 +65,14 @@ public class ActivityEmbeddingAnimationRunnerTests extends ActivityEmbeddingAnim
         final TransitionInfo info = new TransitionInfoBuilder(TRANSIT_OPEN, 0)
                 .addChange(createChange(FLAG_IN_TASK_WITH_EMBEDDED_ACTIVITY))
                 .build();
-        doReturn(mAnimator).when(mAnimRunner).createAnimator(any(), any(), any(), any(), any());
+        doReturn(mAnimator).when(mAnimRunner).createAnimator(any(), any(), any(), any(),
+                any());
 
         mAnimRunner.startAnimation(mTransition, info, mStartTransaction, mFinishTransaction);
 
         final ArgumentCaptor<Runnable> finishCallback = ArgumentCaptor.forClass(Runnable.class);
-        verify(mAnimRunner).createAnimator(eq(info), eq(mStartTransaction), eq(mFinishTransaction),
+        verify(mAnimRunner).createAnimator(eq(info), eq(mStartTransaction),
+                eq(mFinishTransaction),
                 finishCallback.capture(), any());
         verify(mStartTransaction).apply();
         verify(mAnimator).start();
diff --git a/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/activityembedding/ActivityEmbeddingAnimationTestBase.java b/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/activityembedding/ActivityEmbeddingAnimationTestBase.java
index 4f4f356ef2e61..ab1ccd4599a2d 100644
--- a/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/activityembedding/ActivityEmbeddingAnimationTestBase.java
+++ b/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/activityembedding/ActivityEmbeddingAnimationTestBase.java
@@ -47,6 +47,7 @@ abstract class ActivityEmbeddingAnimationTestBase extends ShellTestCase {
 
     @Mock
     ShellInit mShellInit;
+
     @Mock
     Transitions mTransitions;
     @Mock
diff --git a/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/activityembedding/ActivityEmbeddingControllerTests.java b/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/activityembedding/ActivityEmbeddingControllerTests.java
index b8f615a1855f5..ba34f1f74cd3d 100644
--- a/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/activityembedding/ActivityEmbeddingControllerTests.java
+++ b/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/activityembedding/ActivityEmbeddingControllerTests.java
@@ -29,9 +29,13 @@ import static org.mockito.Mockito.doReturn;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.verifyNoMoreInteractions;
 
+import android.animation.Animator;
+import android.animation.ValueAnimator;
 import android.graphics.Rect;
+import android.view.SurfaceControl;
 import android.window.TransitionInfo;
 
+import androidx.test.annotation.UiThreadTest;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
 import androidx.test.filters.SmallTest;
 
@@ -58,7 +62,8 @@ public class ActivityEmbeddingControllerTests extends ActivityEmbeddingAnimation
     @Before
     public void setup() {
         super.setUp();
-        doReturn(mAnimator).when(mAnimRunner).createAnimator(any(), any(), any(), any(), any());
+        doReturn(mAnimator).when(mAnimRunner).createAnimator(any(), any(), any(), any(),
+                any());
     }
 
     @Test
@@ -182,6 +187,44 @@ public class ActivityEmbeddingControllerTests extends ActivityEmbeddingAnimation
         verifyNoMoreInteractions(mFinishTransaction);
     }
 
+    @UiThreadTest
+    @Test
+    public void testMergeAnimation() {
+        final TransitionInfo info = new TransitionInfoBuilder(TRANSIT_OPEN, 0)
+                .addChange(createEmbeddedChange(
+                        EMBEDDED_LEFT_BOUNDS, EMBEDDED_LEFT_BOUNDS, TASK_BOUNDS))
+                .build();
+
+        final ValueAnimator animator = ValueAnimator.ofFloat(0, 1);
+        animator.addListener(new Animator.AnimatorListener() {
+            @Override
+            public void onAnimationStart(Animator animation) {
+            }
+
+            @Override
+            public void onAnimationEnd(Animator animation) {
+                mController.onAnimationFinished(mTransition);
+            }
+
+            @Override
+            public void onAnimationCancel(Animator animation) {
+            }
+
+            @Override
+            public void onAnimationRepeat(Animator animation) {
+            }
+        });
+        doReturn(animator).when(mAnimRunner).createAnimator(any(), any(), any(), any(), any());
+        mController.startAnimation(mTransition, info, mStartTransaction,
+                mFinishTransaction, mFinishCallback);
+        verify(mFinishCallback, never()).onTransitionFinished(any(), any());
+        mController.mergeAnimation(mTransition, info, new SurfaceControl.Transaction(),
+                mTransition,
+                (wct, cb) -> {
+                });
+        verify(mFinishCallback).onTransitionFinished(any(), any());
+    }
+
     @Test
     public void testOnAnimationFinished() {
         // Should not call finish when there is no transition.