dont use TwoPanePageRoute if there is no hinge

lib/main.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:dual_screen/dual_screen.dart';
 import 'package:firebase_core/firebase_core.dart';
 import 'package:firebase_crashlytics/firebase_crashlytics.dart';
 import 'package:flutter/foundation.dart';
@@ -69,6 +70,7 @@ class GalleryApp extends StatelessWidget {
       child: Builder(
         builder: (context) {
           final options = GalleryOptions.of(context);
+          final hasHinge = MediaQuery.of(context).hinge?.bounds != null;
           return MaterialApp(
             restorationScopeId: 'rootGallery',
             title: 'Flutter Gallery',
@@ -91,7 +93,8 @@ class GalleryApp extends StatelessWidget {
               deviceLocale = locales?.first;
               return basicLocaleListResolution(locales, supportedLocales);
             },
-            onGenerateRoute: RouteConfiguration.onGenerateRoute,
+            onGenerateRoute: (settings) =>
+                RouteConfiguration.onGenerateRoute(settings, hasHinge),
           );
         },
       ),

lib/routes.dart

@@ -118,7 +118,10 @@ class RouteConfiguration {
   /// route. Set it on the [MaterialApp.onGenerateRoute] or
   /// [WidgetsApp.onGenerateRoute] to make use of the [paths] for route
   /// matching.
-  static Route<dynamic>? onGenerateRoute(RouteSettings settings) {
+  static Route<dynamic>? onGenerateRoute(
+    RouteSettings settings,
+    bool hasHinge,
+  ) {
     for (final path in paths) {
       final regExpPattern = RegExp(path.pattern);
       if (regExpPattern.hasMatch(settings.name!)) {
@@ -130,7 +133,7 @@ class RouteConfiguration {
             settings: settings,
           );
         }
-        if (path.openInSecondScreen) {
+        if (path.openInSecondScreen && hasHinge) {
           return TwoPanePageRoute<void>(
             builder: (context) => path.builder(context, match),
             settings: settings,