diff --git a/core/java/android/inputmethodservice/InputMethodService.java b/core/java/android/inputmethodservice/InputMethodService.java
index 4ee5383a56be0..ad5c21295e15e 100644
--- a/core/java/android/inputmethodservice/InputMethodService.java
+++ b/core/java/android/inputmethodservice/InputMethodService.java
@@ -1628,7 +1628,7 @@ public class InputMethodService extends AbstractInputMethodService {
     }
 
     private void reportFullscreenMode() {
-        mPrivOps.reportFullscreenMode(mIsFullscreen);
+        mPrivOps.reportFullscreenModeAsync(mIsFullscreen);
     }
 
     /**
diff --git a/core/java/com/android/internal/inputmethod/IInputMethodPrivilegedOperations.aidl b/core/java/com/android/internal/inputmethod/IInputMethodPrivilegedOperations.aidl
index 20e520efc7613..e6ace331f23af 100644
--- a/core/java/com/android/internal/inputmethod/IInputMethodPrivilegedOperations.aidl
+++ b/core/java/com/android/internal/inputmethod/IInputMethodPrivilegedOperations.aidl
@@ -33,7 +33,7 @@ oneway interface IInputMethodPrivilegedOperations {
     void reportStartInput(in IBinder startInputToken, in IVoidResultCallback resultCallback);
     void createInputContentUriToken(in Uri contentUri, in String packageName,
             in IIInputContentUriTokenResultCallback resultCallback);
-    void reportFullscreenMode(boolean fullscreen, in IVoidResultCallback resultCallback);
+    void reportFullscreenModeAsync(boolean fullscreen);
     void setInputMethod(String id, in IVoidResultCallback resultCallback);
     void setInputMethodAndSubtype(String id, in InputMethodSubtype subtype,
             in IVoidResultCallback resultCallback);
diff --git a/core/java/com/android/internal/inputmethod/InputMethodPrivilegedOperations.java b/core/java/com/android/internal/inputmethod/InputMethodPrivilegedOperations.java
index 10009140a7c0e..c2760a5cca446 100644
--- a/core/java/com/android/internal/inputmethod/InputMethodPrivilegedOperations.java
+++ b/core/java/com/android/internal/inputmethod/InputMethodPrivilegedOperations.java
@@ -172,21 +172,18 @@ public final class InputMethodPrivilegedOperations {
     }
 
     /**
-     * Calls {@link IInputMethodPrivilegedOperations#reportFullscreenMode(boolean,
-     * IVoidResultCallback)}.
+     * Calls {@link IInputMethodPrivilegedOperations#reportFullscreenModeAsync(boolean)}.
      *
      * @param fullscreen {@code true} if the IME enters full screen mode
      */
     @AnyThread
-    public void reportFullscreenMode(boolean fullscreen) {
+    public void reportFullscreenModeAsync(boolean fullscreen) {
         final IInputMethodPrivilegedOperations ops = mOps.getAndWarnIfNull();
         if (ops == null) {
             return;
         }
         try {
-            final Completable.Void value = Completable.createVoid();
-            ops.reportFullscreenMode(fullscreen, ResultCallbacks.of(value));
-            Completable.getResult(value);
+            ops.reportFullscreenModeAsync(fullscreen);
         } catch (RemoteException e) {
             throw e.rethrowFromSystemServer();
         }
diff --git a/services/core/java/com/android/server/inputmethod/InputMethodManagerService.java b/services/core/java/com/android/server/inputmethod/InputMethodManagerService.java
index 7994fccbd650c..2b9c086670289 100644
--- a/services/core/java/com/android/server/inputmethod/InputMethodManagerService.java
+++ b/services/core/java/com/android/server/inputmethod/InputMethodManagerService.java
@@ -6007,9 +6007,8 @@ public class InputMethodManagerService extends IInputMethodManager.Stub
 
         @BinderThread
         @Override
-        public void reportFullscreenMode(boolean fullscreen, IVoidResultCallback resultCallback) {
-            CallbackUtils.onResult(resultCallback,
-                    () -> mImms.reportFullscreenMode(mToken, fullscreen));
+        public void reportFullscreenModeAsync(boolean fullscreen) {
+            mImms.reportFullscreenMode(mToken, fullscreen);
         }
 
         @BinderThread