我在颤振（飞镖）中遇到一些错误

Question

我正在看YouTube的Flutter教程。我来到了Firebase部分。然而，我在这部分得到了一个错误。我得到一个错误，即使我键入相同的。我想我得到了这样一个错误，因为有Flutter语言的更新。对不起，我的英语不好。提前谢谢你帮助我。

错误图像：

主要的飞奔

import 'package:firebasedenemem/singup_screen.dart';
import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
        title: 'Flutter Demo',
        theme: ThemeData(
          primarySwatch: Colors.blue,
        ),
        home: const SignupScreen());
  }
}

signup_screen.dart

import 'package:firebase_auth/firebase_auth.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:flutter/material.dart';
import 'dart:io';

class SignupScreen extends StatefulWidget {
  const SignupScreen({Key? key}) : super(key: key);

  @override
  _SignupScreenState createState() => _SignupScreenState();
}

class _SignupScreenState extends State<SignupScreen> {
  final GlobalKey<FormState> _formKey = GlobalKey<FormState>();

  final picUrl = "";
  File? _image;

  final TextEditingController _nameController = TextEditingController();
  final TextEditingController _lastnameController = TextEditingController();
  final TextEditingController _emailController = TextEditingController();

  FirebaseAuth auth = FirebaseAuth.instance;

  @override
  Widget build(BuildContext context) {
    return Container(
      padding: EdgeInsets.only(top: 30),
      color: Colors.grey[800],
      child: Column(
        mainAxisSize: MainAxisSize.min,
        children: <Widget>[
          const Image(
            image: AssetImage("assets/images/logo.png"),
            width: 200,
            height: 100,
          ),
          Container(
            margin: const EdgeInsets.only(top: 10),
            decoration: BoxDecoration(
                border: Border.all(color: Colors.white, width: 11),
                color: Colors.white,
                borderRadius: const BorderRadius.only(
                  topRight: Radius.circular(122),
                  bottomLeft: Radius.circular(122),
                )),
          ),
        ],
      ),
    );
  }
}

Answer 1

打开/android/app/build。gradle文件。在dependencies下添加多索引模块，并在defaultConfig中启用它：

android {
    defaultConfig {
        // ...
        minSdkVersion 16
        targetSdkVersion 28
        multiDexEnabled true
    }
}

dependencies {
  implementation 'com.android.support:multidex:1.0.3'

此链接中的更多详细信息：https://firebase.flutter.dev/docs/installation/android

另请参见此答案，它适用于您的情况：导致D8:无法在单个dex文件中容纳请求的类（#方法：71610