diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/common/split/SplitLayout.java b/libs/WindowManager/Shell/src/com/android/wm/shell/common/split/SplitLayout.java
index e42f511eb3914..a445707d85a07 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/common/split/SplitLayout.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/common/split/SplitLayout.java
@@ -92,12 +92,16 @@ public final class SplitLayout {
     private DividerSnapAlgorithm mDividerSnapAlgorithm;
     private int mDividePosition;
     private boolean mInitialized = false;
+    private int mOrientation;
+    private int mRotation;
 
     public SplitLayout(String windowName, Context context, Configuration configuration,
             SplitLayoutHandler splitLayoutHandler,
             SplitWindowManager.ParentContainerCallbacks parentContainerCallbacks,
             DisplayImeController displayImeController, ShellTaskOrganizer taskOrganizer) {
         mContext = context.createConfigurationContext(configuration);
+        mOrientation = configuration.orientation;
+        mRotation = configuration.windowConfiguration.getRotation();
         mSplitLayoutHandler = splitLayoutHandler;
         mDisplayImeController = displayImeController;
         mSplitWindowManager = new SplitWindowManager(
@@ -144,25 +148,37 @@ public final class SplitLayout {
 
     /** Applies new configuration, returns {@code false} if there's no effect to the layout. */
     public boolean updateConfiguration(Configuration configuration) {
+        boolean affectsLayout = false;
+
+        // Make sure to render the divider bar with proper resources that matching the screen
+        // orientation.
+        final int orientation = configuration.orientation;
+        if (orientation != mOrientation) {
+            mOrientation = orientation;
+            mContext = mContext.createConfigurationContext(configuration);
+            mSplitWindowManager.setConfiguration(configuration);
+            affectsLayout = true;
+        }
+
+        // Update the split bounds when necessary. Besides root bounds changed, split bounds need to
+        // be updated when the rotation changed to cover the case that users rotated the screen 180
+        // degrees.
+        final int rotation = configuration.windowConfiguration.getRotation();
         final Rect rootBounds = configuration.windowConfiguration.getBounds();
-        if (mRootBounds.equals(rootBounds)) {
-            return false;
+        if (rotation != mRotation || !mRootBounds.equals(rootBounds)) {
+            mRootBounds.set(rootBounds);
+            mDividerSnapAlgorithm = getSnapAlgorithm(mContext, mRootBounds);
+            resetDividerPosition();
+            affectsLayout = true;
         }
 
-        mContext = mContext.createConfigurationContext(configuration);
-        mSplitWindowManager.setConfiguration(configuration);
-        mRootBounds.set(rootBounds);
-        mDividerSnapAlgorithm = getSnapAlgorithm(mContext, mRootBounds);
-        resetDividerPosition();
-
-        // Don't inflate divider bar if it is not initialized.
-        if (!mInitialized) {
-            return false;
+        if (mInitialized && affectsLayout) {
+            release();
+            init();
+            return true;
         }
 
-        release();
-        init();
-        return true;
+        return false;
     }
 
     /** Updates recording bounds of divider window and both of the splits. */
diff --git a/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/common/split/SplitLayoutTests.java b/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/common/split/SplitLayoutTests.java
index 952dc31cdaee6..d865f71db5b6d 100644
--- a/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/common/split/SplitLayoutTests.java
+++ b/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/common/split/SplitLayoutTests.java
@@ -61,7 +61,7 @@ public class SplitLayoutTests extends ShellTestCase {
         mSplitLayout = new SplitLayout(
                 "TestSplitLayout",
                 mContext,
-                getConfiguration(false),
+                getConfiguration(),
                 mSplitLayoutHandler,
                 b -> b.setParent(mRootLeash),
                 mDisplayImeController,
@@ -71,9 +71,23 @@ public class SplitLayoutTests extends ShellTestCase {
     @Test
     @UiThreadTest
     public void testUpdateConfiguration() {
+        final Configuration config = getConfiguration();
         mSplitLayout.init();
-        assertThat(mSplitLayout.updateConfiguration(getConfiguration(false))).isFalse();
-        assertThat(mSplitLayout.updateConfiguration(getConfiguration(true))).isTrue();
+
+        // Verify it returns true if new config won't affect split layout.
+        assertThat(mSplitLayout.updateConfiguration(config)).isFalse();
+
+        // Verify updateConfiguration returns true if the orientation changed.
+        config.orientation = ORIENTATION_LANDSCAPE;
+        assertThat(mSplitLayout.updateConfiguration(config)).isTrue();
+
+        // Verify updateConfiguration returns true if it rotated.
+        config.windowConfiguration.setRotation(1);
+        assertThat(mSplitLayout.updateConfiguration(config)).isTrue();
+
+        // Verify updateConfiguration returns true if the root bounds changed.
+        config.windowConfiguration.setBounds(new Rect(0, 0, 2160, 1080));
+        assertThat(mSplitLayout.updateConfiguration(config)).isTrue();
     }
 
     @Test
@@ -108,12 +122,13 @@ public class SplitLayoutTests extends ShellTestCase {
         verify(mSplitLayoutHandler).onSnappedToDismiss(eq(true));
     }
 
-    private static Configuration getConfiguration(boolean isLandscape) {
+    private static Configuration getConfiguration() {
         final Configuration configuration = new Configuration();
         configuration.unset();
-        configuration.orientation = isLandscape ? ORIENTATION_LANDSCAPE : ORIENTATION_PORTRAIT;
+        configuration.orientation = ORIENTATION_PORTRAIT;
+        configuration.windowConfiguration.setRotation(0);
         configuration.windowConfiguration.setBounds(
-                new Rect(0, 0, isLandscape ? 2160 : 1080, isLandscape ? 1080 : 2160));
+                new Rect(0, 0, 1080, 2160));
         return configuration;
     }