Flutter 在yaml中找不到firebase_堆芯

创建全新的颤振项目，除了 添加到yaml：

dependencies:
  flutter:
    sdk: flutter
  firebase_core: "0.2.3"

“packages get”之后，重建项目在GeneratedPluginRegistrant中给出错误

**Error:(4, 40) java: package io.flutter.plugins.firebase.core does not exist
Error:(14, 5) java: cannot find symbol
  symbol:   variable FirebaseCorePlugin
  location: class io.flutter.plugins.GeneratedPluginRegistrant
Information:javac 1.8.0_131 was used to compile java sources
Information:5/30/2018 7:18 AM - Compilation completed with 2 errors and 0 warnings in 2 s 101 ms**

颤振医生

Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel beta, v0.4.4, on Microsoft Windows [Version 10.0.17134.48], locale en-US)
[√] Android toolchain - develop for Android devices (Android SDK 27.0.3)
[√] Android Studio (version 3.1)
[√] IntelliJ IDEA Community Edition (version 2018.1)
[!] VS Code, 64-bit edition (version 1.23.1)
[√] Connected devices (1 available)

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版本声明中缺少

^

符号。正确的方法是

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firebase\u core:“^0.2.3”

java:package io.flatter.plugins.firebase.core不存在

---

这是一个java类路径错误。只需添加到类路径

我在Mac上也做了同样的操作，但没有得到相同的错误。您是否能够创建和运行任何示例flift项目？当我运行时，我在控制台中看到注释：C:\flift\u windows\u v0.3.2-beta\flift\ pub cache\hosted\pub.dartlang.org\firebase\u core-0.2.3\android\src\main\java\io\flift\plugins\firebase\coreplugin.java使用未经检查或不安全的操作。