diff --git a/core/java/android/view/inputmethod/InputMethodManagerInternal.java b/core/java/android/view/inputmethod/InputMethodManagerInternal.java
index ce9908cce0937..77df4e3883a7f 100644
--- a/core/java/android/view/inputmethod/InputMethodManagerInternal.java
+++ b/core/java/android/view/inputmethod/InputMethodManagerInternal.java
@@ -32,4 +32,9 @@ public interface InputMethodManagerInternal {
      * Called by the window manager to let the input method manager rotate the input method.
      */
     void switchInputMethod(boolean forwardDirection);
+
+    /**
+     * Hides the current input method, if visible.
+     */
+    void hideCurrentInputMethod();
 }
diff --git a/services/core/java/com/android/server/InputMethodManagerService.java b/services/core/java/com/android/server/InputMethodManagerService.java
index 727bf5c6bec9a..5d8fe7c68fe8f 100644
--- a/services/core/java/com/android/server/InputMethodManagerService.java
+++ b/services/core/java/com/android/server/InputMethodManagerService.java
@@ -159,6 +159,7 @@ public class InputMethodManagerService extends IInputMethodManager.Stub
     static final int MSG_BIND_INPUT = 1010;
     static final int MSG_SHOW_SOFT_INPUT = 1020;
     static final int MSG_HIDE_SOFT_INPUT = 1030;
+    static final int MSG_HIDE_CURRENT_INPUT_METHOD = 1035;
     static final int MSG_ATTACH_TOKEN = 1040;
     static final int MSG_CREATE_SESSION = 1050;
 
@@ -2846,6 +2847,11 @@ public class InputMethodManagerService extends IInputMethodManager.Stub
                 }
                 args.recycle();
                 return true;
+            case MSG_HIDE_CURRENT_INPUT_METHOD:
+                synchronized (mMethodMap) {
+                    hideCurrentInputLocked(0, null);
+                }
+                return true;
             case MSG_ATTACH_TOKEN:
                 args = (SomeArgs)msg.obj;
                 try {
@@ -3880,6 +3886,12 @@ public class InputMethodManagerService extends IInputMethodManager.Stub
             mHandler.sendMessage(mHandler.obtainMessage(MSG_SWITCH_IME,
                     forwardDirection ? 1 : 0, 0));
         }
+
+        @Override
+        public void hideCurrentInputMethod() {
+            mHandler.removeMessages(MSG_HIDE_CURRENT_INPUT_METHOD);
+            mHandler.sendEmptyMessage(MSG_HIDE_CURRENT_INPUT_METHOD);
+        }
     }
 
     private static String imeWindowStatusToString(final int imeWindowVis) {
diff --git a/services/core/java/com/android/server/wm/DockedStackDividerController.java b/services/core/java/com/android/server/wm/DockedStackDividerController.java
index 04d467a3b2759..e73649ddcf3ce 100644
--- a/services/core/java/com/android/server/wm/DockedStackDividerController.java
+++ b/services/core/java/com/android/server/wm/DockedStackDividerController.java
@@ -45,9 +45,11 @@ import android.view.SurfaceControl;
 import android.view.animation.AnimationUtils;
 import android.view.animation.Interpolator;
 import android.view.animation.PathInterpolator;
+import android.view.inputmethod.InputMethodManagerInternal;
 
 import com.android.internal.policy.DividerSnapAlgorithm;
 import com.android.internal.policy.DockedDividerUtils;
+import com.android.server.LocalServices;
 import com.android.server.wm.DimLayer.DimLayerUser;
 import com.android.server.wm.WindowManagerService.H;
 
@@ -131,6 +133,7 @@ public class DockedStackDividerController implements DimLayerUser {
     private float mLastAnimationProgress;
     private float mLastDividerProgress;
     private final DividerSnapAlgorithm[] mSnapAlgorithmForRotation = new DividerSnapAlgorithm[4];
+    private boolean mImeHideRequested;
 
     DockedStackDividerController(WindowManagerService service, DisplayContent displayContent) {
         mService = service;
@@ -375,11 +378,39 @@ public class DockedStackDividerController implements DimLayerUser {
             }
         }
         mDockedStackListeners.finishBroadcast();
-        if (!exists) {
+        if (exists) {
+            InputMethodManagerInternal inputMethodManagerInternal =
+                    LocalServices.getService(InputMethodManagerInternal.class);
+            if (inputMethodManagerInternal != null) {
+
+                // Hide the current IME to avoid problems with animations from IME adjustment when
+                // attaching the docked stack.
+                inputMethodManagerInternal.hideCurrentInputMethod();
+                mImeHideRequested = true;
+            }
+        } else {
             setMinimizedDockedStack(false);
         }
     }
 
+    /**
+     * Resets the state that IME hide has been requested. See {@link #isImeHideRequested}.
+     */
+    void resetImeHideRequested() {
+        mImeHideRequested = false;
+    }
+
+    /**
+     * The docked stack divider controller makes sure the IME gets hidden when attaching the docked
+     * stack, to avoid animation problems. This flag indicates whether the request to hide the IME
+     * has been sent in an asynchronous manner, and the IME should be treated as hidden already.
+     *
+     * @return whether IME hide request has been sent
+     */
+    boolean isImeHideRequested() {
+        return mImeHideRequested;
+    }
+
     void notifyDockedStackMinimizedChanged(boolean minimizedDock, long animDuration) {
         mService.mH.removeMessages(NOTIFY_DOCKED_STACK_MINIMIZED_CHANGED);
         mService.mH.obtainMessage(NOTIFY_DOCKED_STACK_MINIMIZED_CHANGED,
diff --git a/services/core/java/com/android/server/wm/WindowManagerService.java b/services/core/java/com/android/server/wm/WindowManagerService.java
index 695ed36bb2136..08256e664680a 100644
--- a/services/core/java/com/android/server/wm/WindowManagerService.java
+++ b/services/core/java/com/android/server/wm/WindowManagerService.java
@@ -7596,7 +7596,8 @@ public class WindowManagerService extends IWindowManager.Stub
 
     void adjustForImeIfNeeded(final DisplayContent displayContent) {
         final WindowState imeWin = mInputMethodWindow;
-        final boolean imeVisible = imeWin != null && imeWin.isVisibleLw() && imeWin.isDisplayedLw();
+        final boolean imeVisible = imeWin != null && imeWin.isVisibleLw() && imeWin.isDisplayedLw()
+                && !displayContent.mDividerControllerLocked.isImeHideRequested();
         final boolean dockVisible = isStackVisibleLocked(DOCKED_STACK_ID);
         final TaskStack imeTargetStack = getImeFocusStackLocked();
         final int imeDockSide = (dockVisible && imeTargetStack != null) ?
diff --git a/services/core/java/com/android/server/wm/WindowStateAnimator.java b/services/core/java/com/android/server/wm/WindowStateAnimator.java
index f14fd814f5a99..37d6faf5a8464 100644
--- a/services/core/java/com/android/server/wm/WindowStateAnimator.java
+++ b/services/core/java/com/android/server/wm/WindowStateAnimator.java
@@ -1745,6 +1745,10 @@ class WindowStateAnimator {
                 mWin.mAppToken.onFirstWindowDrawn(mWin, this);
             }
 
+            if (mWin.mAttrs.type == TYPE_INPUT_METHOD) {
+                mWin.mDisplayContent.mDividerControllerLocked.resetImeHideRequested();
+            }
+
             return true;
         }
         return false;