颤振错误： 错误：无法解析'package:firebase_messaging/firebase_messaging.dart'中的包'firebase_messaging'

Question

我正在构建一个使用Firebase消息的Flutter Android应用程序。然而，我在编译时遇到了这个错误：

Error: Could not resolve the package 'firebase_messaging' in 
'package:firebase_messaging/firebase_messaging.dart'.

以下是相关代码摘录：

Android\Build.Grade:

buildscript {
repositories {
google()

}
dependencies {
classpath 'com.android.tools.build:gradle:3.5.0'
classpath 'com.google.gms:google-services:4.3.3'
}
}
allprojects {
repositories {
google()
jcenter()
}

}

App\Build.Grade:

dependencies {
implementation 'com.google.firebase:firebase-messaging:20.2.4'

}

pubspec.yaml:

dependencies:
flutter:
sdk: flutter
shared_preferences: ^0.5.2
firebase_core: ^0.2.5

Answer 1

您需要将firebase_messaging: ^7.0.0添加到pubspec.yaml