step 3 : buat screen splash screen

lib/app/route.dart

@@ -0,0 +1,28 @@
+import 'package:flutter/material.dart';
+
+import '../screen/splash_screen.dart';
+
+const splashRoute = "/splashRoute";
+
+class AppRoute {
+  static Route<dynamic> generateRoute(RouteSettings settings) {
+    // splash screen
+    if (settings.name == splashRoute) {
+      return MaterialPageRoute(builder: (context) {
+        return MediaQuery(
+          data: MediaQuery.of(context)
+              .copyWith(textScaler: TextScaler.linear(1.0), padding: EdgeInsets.all(0)),
+          child: SplashScreen(),
+        );
+      });
+    }
+   
+    return MaterialPageRoute(builder: (context) {
+      return MediaQuery(
+        data: MediaQuery.of(context)
+            .copyWith(padding: const EdgeInsets.all(0), textScaler: TextScaler.linear(1.0)),
+        child: SplashScreen(),
+      );
+    });
+  }
+}