firebase链接flutter项目后出错

Question

[应用程序/build.gradle] (https://i.sstatic.net/xFBEUbUi.png)

[主.dart] (https://i.sstatic.net/ARYitV8J.png)

这是我的终端

E/flutter ( 4746): [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: PlatformException(java.lang.Exception: Failed to load FirebaseOptions from resource. Check that you have defined values.xml correctly., Exception, Cause: null, Stacktrace: java.lang.Exception: Failed to load FirebaseOptions from resource. Check that you have defined values.xml correctly.
E/flutter ( 4746):      at io.flutter.plugins.firebase.core.FlutterFirebaseCorePlugin.lambda$optionsFromResource$4$io-flutter-plugins-firebase-core-FlutterFirebaseCorePlugin(FlutterFirebaseCorePlugin.java:207)
E/flutter ( 4746):      at io.flutter.plugins.firebase.core.FlutterFirebaseCorePlugin$$ExternalSyntheticLambda2.run(Unknown Source:4)
E/flutter ( 4746):      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
E/flutter ( 4746):      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
E/flutter ( 4746):      at java.lang.Thread.run(Thread.java:923)
E/flutter ( 4746): , null)
E/flutter ( 4746): #0      FirebaseCoreHostApi.optionsFromResource (package:firebase_core_platform_interface/src/pigeon/messages.pigeon.dart:242:7)
E/flutter ( 4746): <asynchronous suspension>
E/flutter ( 4746): #1      MethodChannelFirebase.initializeApp (package:firebase_core_platform_interface/src/method_channel/method_channel_firebase.dart:89:25)
E/flutter ( 4746): <asynchronous suspension>
E/flutter ( 4746): #2      Firebase.initializeApp (package:firebase_core/src/firebase.dart:43:31)
E/flutter ( 4746): <asynchronous suspension>
E/flutter ( 4746): #3      main (package:new_hemobridge/main.dart:7:2)
E/flutter ( 4746): <asynchronous suspension>
E/flutter ( 4746):
Syncing files to device sdk gphone x86...                          709ms

Flutter run key commands.
r Hot reload.
R Hot restart.
h List all available interactive commands.
d Detach (terminate "flutter run" but leave application running).
c Clear the screen
q Quit (terminate the application on the device).

A Dart VM Service on sdk gphone x86 is available at: http://127.0.0.1:63008/v8-J0gdc5eg=/     
The Flutter DevTools debugger and profiler on sdk gphone x86 is available at:
http://127.0.0.1:9102?uri=http://127.0.0.1:63008/v8-J0gdc5eg=/


i dont know,everyone suggest check the google service json file but its all right,doublechecked the dependencies and pubsec,yaml file nothing sus caught my eyes .

我不知道，每个人都建议检查谷歌服务json文件，但它没问题，仔细检查了依赖项和pubsec，yaml文件没有什么引起我的注意

Answer 1

您必须添加

options: DefaultFirebaseOptions.currentPlatform,

作为

Firebase.initializeApp

的属性

WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp(
    options: DefaultFirebaseOptions.currentPlatform,
  );

为此，您需要

firebase_options.dart

文件

以下是我将 Firebase 添加到环境并将其与 flutter 链接的方法：

1. 从 firebase 控制台创建一个 firebase 项目

2. 按照此FlutterFire中的说明进行操作，以便我可以将 firebase 项目与 flutter 项目链接起来

3. 之后运行应用程序以确保一切正常。

4. 我需要

   firebase_CLI

   将

   firebase_options.dart

   文件添加到项目中，以便我可以在

   DefaultFirebaseOptions.currentPlatform

    中使用 

   main.dart

5. 我从

   here

   下载了 CLI 并安装了它（您可以直接使用 Gmail 登录您的 Firebase 项目）。

6. 我从

   这里

   下载了最新版本的node.js

7. 安装起来估计需要一段时间

   powerShell

8. 确保这三个路径添加到

   system variables

   &&

   personal variables

  C:\Users\USERNAME\AppData\Local\Pub\Cache\bin
  C:\Users\USERNAME\AppData\Roaming\npm
  C:\Program Files\nodejs

9. 运行

   node --version

   &&

   npm --version

   以确保一切正常

10. 在命令提示符下运行

    npm install -g firebase-tools

11. 然后

    dart pub global activate flutterfire_cli

12. 如果

    vsCode

    打开，请将其关闭并再次打开

13. 在

    vsCode

    中的flutter项目目录中运行

    flutterfire configure

14. 您还可以阅读这些说明

15. 它应该可以运行并且一切正常。