diff --git a/core/api/module-lib-current.txt b/core/api/module-lib-current.txt
index 7cfa1e3..1a22e9b 100644
--- a/core/api/module-lib-current.txt
+++ b/core/api/module-lib-current.txt
@@ -14,7 +14,7 @@
 
   @UiContext public class Activity extends android.view.ContextThemeWrapper implements android.content.ComponentCallbacks2 android.view.KeyEvent.Callback android.view.LayoutInflater.Factory2 android.view.View.OnCreateContextMenuListener android.view.Window.Callback {
     method public final boolean addDumpable(@NonNull android.util.Dumpable);
-    method public final boolean isResumed();
+    method @FlaggedApi("android.nfc.enable_nfc_mainline") public final boolean isResumed();
   }
 
   public class ActivityManager {
diff --git a/core/java/android/app/Activity.java b/core/java/android/app/Activity.java
index 2590869..06c139f 100644
--- a/core/java/android/app/Activity.java
+++ b/core/java/android/app/Activity.java
@@ -31,6 +31,7 @@
 import android.annotation.CallbackExecutor;
 import android.annotation.ColorInt;
 import android.annotation.DrawableRes;
+import android.annotation.FlaggedApi;
 import android.annotation.IdRes;
 import android.annotation.IntDef;
 import android.annotation.LayoutRes;
@@ -79,6 +80,7 @@
 import android.media.AudioManager;
 import android.media.session.MediaController;
 import android.net.Uri;
+import android.nfc.Flags;
 import android.os.BadParcelableException;
 import android.os.Build;
 import android.os.Bundle;
@@ -8915,6 +8917,7 @@
      * @hide
      */
     @UnsupportedAppUsage
+    @FlaggedApi(Flags.FLAG_ENABLE_NFC_MAINLINE)
     @SystemApi(client = SystemApi.Client.MODULE_LIBRARIES)
     public final boolean isResumed() {
         return mResumed;