找不到符号“消息"在 com.google.firebase.messaging.FirebaseMessagingService-移动开发问题

Cannot find symbol quot;messagingquot; in com.google.firebase.messaging.FirebaseMessagingService(找不到符号“消息在 com.google.firebase.messaging.FirebaseMessagingService)

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问题描述

我正在尝试使用 firebase 9.2.1 库访问 FirebaseMessagingService.我已经成功创建了一个项目，然后下载了 JSON 文件.我终于将此 JSON 文件与我的项目集成.FirebaseInstanceIDService 运行良好，但 FirebaseMessagingService 显示错误.所以我在android studio中检查了我的项目文件夹.然后我发现 firebase-messaging 9.2.1 库丢失了.我该如何解决这个问题.我已经升级了所有的 SDK 库.请帮我解决这个问题.

I am trying to access FirebaseMessagingService using firebase 9.2.1 library. I have successfully created a project then download the JSON file. I have finally integrated this JSON file with my project. FirebaseInstanceIDService is running fine but showing error with FirebaseMessagingService. So i checked my project folder inside android studio. Then i find that firebase-messaging 9.2.1 library is missing. How can i resolve this issue. I have already upgraded all of the SDK libraries. Please help me to fix this issue.

推荐答案

您需要将 Firebase Messaging 添加到您的依赖项中:

You need to add Firebase Messaging to your dependencies:

compile 'com.google.firebase:firebase-messaging:9.2.1'

文档中介绍了 Firebase 云消息传递的设置.

Setup for Firebase Cloud Messaging is explained in the documentation.

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