Where is the splash screen related code in this Flutter code?

Question

I am creating a webview app by modifying the example source file in the flutter book. When you run the app, the splash screen turns on and then moves to the web view, but there are no splash-related comments or explanations, so I don't know where the code is.

The code is here

main.dart

import 'package:ch_08/screen/home_screen.dart';
import 'package:flutter/material.dart';

void main() {
  // 플러터 프레임워크가 앱을 실행할 준비가 될때까지
  // 기다림
  WidgetsFlutterBinding.ensureInitialized();

  runApp(
    MaterialApp(
      debugShowCheckedModeBanner: false,
      home: HomeScreen(),
    ),
  );
}

home_screen.dart

import 'dart:io';

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:webview_flutter/webview_flutter.dart';


class HomeScreen extends StatefulWidget {
  //uri = 불러올 홈페이지 주소
  final uri = Uri.parse('https://google.com');

  HomeScreen({Key? key}) : super(key: key);

  @override
  State<HomeScreen> createState() => _HomeScreenState();
}

class _HomeScreenState extends State<HomeScreen> {
  List<DateTime> clicked = [];

  final clickWaitTime = const Duration(seconds: 1);


  final controller = WebViewController()
    ..setJavaScriptMode(JavaScriptMode.unrestricted)
    ..setNavigationDelegate(NavigationDelegate(onPageFinished: (String url) {
    }));

  @override
  void initState() {
    controller.loadRequest(widget.uri);
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return PopScope(
      canPop: false,
      onPopInvoked: (didPop) {
        clicked.add(DateTime.now());

        //마지막 클릭이 마지막 클릭 1초 후인 경우.
        //카운터를 재설정하려면 목록을 지웁니다.
        if (clicked.length > 1 &&
            clicked[clicked.length - 1]
                .difference(clicked[clicked.length - 2]) >
                clickWaitTime) {
          clicked.removeAt(clicked.length - 2);
        }

        //목록의 모든 클릭이 "2회 이상" 클릭이고 총 3번의 클릭이 있는 경우
        //사용자가 세 번 클릭했음을 의미합니다.
        if (clicked.length == 3) {
          clicked.clear();
          SystemNavigator.pop();
          exit(0);
          return;
        }

        //사용자가 더 많은 클릭을 원하는지 확인하기 위해 1초 동안 기다립니다.
        Future.delayed(const Duration(seconds: 1), () {
          if (clicked.length == 1) {
            controller?.goBack();
          } else if (clicked.length == 2) {
            showMessage("뒤로가기를 3번 연속으로 누르면 종료됩니다.");
          }
          clicked.clear();
        });
      },
      child: Scaffold(
        body: SafeArea(
          child: WebViewWidget(controller: controller),
        ),
      ),
    );
  }

  void showMessage(String message) {
    ScaffoldMessenger.of(context).showSnackBar(
      SnackBar(content: Text(message)),
    );
  }
}

Answer 1

its appears that your project android\app\src\main\res\drawable\launch_background.xml file. you can edit this file like this and put logo image in your app.

<?xml version="1.0" encoding="utf-8"?>
<!-- Modify this file to customize your launch splash screen -->
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@android:color/white" />

  <!-- You can insert your own image assets here -->
  <item>

      <bitmap
         android:gravity="center"
         android:src="@drawable/logo" />
    
  </item>
    

</layer-list>

And add your logo image to the android\app\src\main\res\drawable folder. thank you.