android - 在Flutter中添加Firebase.initializeApp()的正确位置在哪里？

Question

我对 flutter 很陌生。我一直在学习某些类(class)，但是进入Firebase时，方法和属性已经发生了很大变化，并且在确定如何连接到Firebase时遇到了一些困难。
在这里，我添加了main.dart文件。

import 'package:flash_chat/screens/cart_screen.dart';
import 'package:flash_chat/screens/stationery.dart';
import 'package:flutter/material.dart';
import 'package:flash_chat/screens/welcome_screen.dart';
import 'package:flash_chat/screens/login_screen.dart';
import 'package:flash_chat/screens/registration_screen.dart';
import 'package:flash_chat/screens/chat_screen.dart';
import 'package:flash_chat/screens/buyer_screen.dart';
import 'package:firebase_core/firebase_core.dart';

void main() => runApp(FlashChat());

class FlashChat extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      initialRoute: WelcomeScreen.id,
      routes: {
        WelcomeScreen.id: (context) => WelcomeScreen(),
        LoginScreen.id: (context) => LoginScreen(),
        RegistrationScreen.id: (context) => RegistrationScreen(),
        ChatScreen.id: (context) => ChatScreen(),
        BuyerScreen.id: (context) => BuyerScreen(),
        StationeryScreen.id: (context) => StationeryScreen(),
        CartScreen.id: (context) => CartScreen(),
      },
    );
  }
}

我是否需要在main.dart本身或其他地方添加它？

Answer 1

是的，firebase插件方法已更改，现在您必须先初始化firebase，然后再使用它们，我在main函数内的main.dart文件中初始化了firebase方法，如下所示。

void main() async {
  WidgetsFlutterBinding.ensureInitialized();

  await Firebase.initializeApp();

  runApp(FlashChat());
}