diff --git a/core/java/com/android/internal/inputmethod/InputMethodUtils.java b/core/java/com/android/internal/inputmethod/InputMethodUtils.java
index 8f8ce95..ac915d1 100644
--- a/core/java/com/android/internal/inputmethod/InputMethodUtils.java
+++ b/core/java/com/android/internal/inputmethod/InputMethodUtils.java
@@ -16,6 +16,7 @@
 
 package com.android.internal.inputmethod;
 
+import android.app.AppOpsManager;
 import android.content.ContentResolver;
 import android.content.Context;
 import android.content.pm.ApplicationInfo;
@@ -637,6 +638,25 @@
     }
 
     /**
+     * Returns true if a package name belongs to a UID.
+     *
+     * <p>This is a simple wrapper of {@link AppOpsManager#checkPackage(int, String)}.</p>
+     * @param appOpsManager the {@link AppOpsManager} object to be used for the validation.
+     * @param uid the UID to be validated.
+     * @param packageName the package name.
+     * @return {@code true} if the package name belongs to the UID.
+     */
+    public static boolean checkIfPackageBelongsToUid(final AppOpsManager appOpsManager,
+            final int uid, final String packageName) {
+        try {
+            appOpsManager.checkPackage(uid, packageName);
+            return true;
+        } catch (SecurityException e) {
+            return false;
+        }
+    }
+
+    /**
      * Utility class for putting and getting settings for InputMethod
      * TODO: Move all putters and getters of settings to this class.
      */
diff --git a/services/core/java/com/android/server/InputMethodManagerService.java b/services/core/java/com/android/server/InputMethodManagerService.java
index 060c8e3..1623eac 100644
--- a/services/core/java/com/android/server/InputMethodManagerService.java
+++ b/services/core/java/com/android/server/InputMethodManagerService.java
@@ -40,6 +40,7 @@
 import android.app.ActivityManagerNative;
 import android.app.AppGlobals;
 import android.app.AlertDialog;
+import android.app.AppOpsManager;
 import android.app.IUserSwitchObserver;
 import android.app.KeyguardManager;
 import android.app.Notification;
@@ -175,6 +176,7 @@
     private InputMethodFileManager mFileManager;
     private final HardKeyboardListener mHardKeyboardListener;
     private final WindowManagerService mWindowManagerService;
+    private final AppOpsManager mAppOpsManager;
 
     final InputBindResult mNoBinding = new InputBindResult(null, null, null, -1, -1);
 
@@ -643,6 +645,7 @@
             }
         }, true /*asyncHandler*/);
         mWindowManagerService = windowManager;
+        mAppOpsManager = (AppOpsManager) mContext.getSystemService(Context.APP_OPS_SERVICE);
         mHardKeyboardListener = new HardKeyboardListener();
         mHasFeature = context.getPackageManager().hasSystemFeature(
                 PackageManager.FEATURE_INPUT_METHODS);
@@ -1746,6 +1749,20 @@
             throw new IllegalArgumentException("Unknown id: " + id);
         }
 
+        if (mCurClient != null && mCurAttribute != null) {
+            final int uid = mCurClient.uid;
+            final String packageName = mCurAttribute.packageName;
+            if (SystemConfig.getInstance().getFixedImeApps().contains(packageName)) {
+                if (InputMethodUtils.checkIfPackageBelongsToUid(mAppOpsManager, uid, packageName)) {
+                    return;
+                }
+                // TODO: Do we need to lock the input method when the application reported an
+                // incorrect package name?
+                Slog.e(TAG, "Ignoring FixedImeApps due to the validation failure. uid=" + uid
+                        + " package=" + packageName);
+            }
+        }
+
         // See if we need to notify a subtype change within the same IME.
         if (id.equals(mCurMethodId)) {
             final int subtypeCount = info.getSubtypeCount();