What is MaterialApp class?

• MaterialApp class is an application that uses material design.

• It is a convenience widget that wraps several widgets that are commonly required for material design applications.

const MaterialApp({
Key key,
GlobalKey<NavigatorState> navigatorKey,
Widget home,
Map<String, WidgetBuilder> routes: const {},
String initialRoute,
RouteFactory onGenerateRoute,
RouteFactory onUnknownRoute,
List<NavigatorObserver> navigatorObservers: const [],
TransitionBuilder builder,
String title: '',
GenerateAppTitle onGenerateTitle,
Color color,
ThemeData theme,
ThemeData darkTheme,
Locale locale,
Iterable<LocalizationsDelegate> localizationsDelegates,
LocaleListResolutionCallback localeListResolutionCallback,
LocaleResolutionCallback localeResolutionCallback,
Iterable<Locale> supportedLocales: const [Locale('en', 'US')],
bool debugShowMaterialGrid: false,
bool showPerformanceOverlay: false,
bool checkerboardRasterCacheImages: false,
bool checkerboardOffscreenLayers: false,
bool showSemanticsDebugger: false,
bool debugShowCheckedModeBanner: true
})

Example :

import 'package:flutter/material.dart';

class UseMaterialApp extends StatefulWidget {
  const UseMaterialApp({super.key});

  @override
  State<UseMaterialApp> createState() => _UseMaterialAppState();
}

class _UseMaterialAppState extends State<UseMaterialApp> {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        appBar: AppBar(
          title: const Text(
            'Material APP ',
            style: TextStyle(color: Colors.white),
          ),
          backgroundColor: Colors.purple,
        ),
      ),
    );
  }
}