Android 无法扩展 Firebase 消息服务

问题描述

我正在尝试在我的应用程序中实现 Firebase 云消息传递，我已经实现了使用此服务的所有设置，但是当我尝试在我的类中扩展 FirebaseMessagingService 时，它给了我错误并且它可以根本找不到，连import com.google.firebase.messaging.FirebaseMessagingService如图:

I am trying to implement Firebase Cloud Messaging in my application, I had implemented all settings to use this service, but when I try to extend FirebaseMessagingService in my class it gives me error and it can't find it at all, I can't even import com.google.firebase.messaging.FirebaseMessagingService as shown in the picture:

我已经添加了所有需要的代码:我将此添加到应用程序 gradle

I had added all the code required: I added this to app gradle

compile 'com.google.firebase:firebase-core:9.4.0' 
apply plugin: 'com.google.gms.google-services'

这个到模块 gradle:

and this to the module gradle:

classpath 'com.google.gms:google-services:3.0.0'

这是清单代码:

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity android:name=".MainActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <service
        android:name=".MyFirebaseMessagingService">
        <intent-filter>
            <action android:name="com.google.firebase.MESSAGING_EVENT"/>
        </intent-filter>
    </service>
    <service
        android:name=".MyFirebaseInstanceIDService">
        <intent-filter>
            <action android:name="com.google.firebase.INSTANCE_ID_EVENT"/>
        </intent-filter>
    </service>
</application>

然后我将 google json 文件添加到应用程序中.所以如果有人可以帮助我，请

and I added the google json file to the app. So if anybody can help me please

推荐答案

如果要使用消息传递，则必须添加消息传递模块.现在你只添加了核心模块.

If you want to use messaging, you have to add the messaging module. Right now you only added the core module.

所以继续，包括

compile 'com.google.firebase:firebase-messaging:9.4.0'

所有可用的模块都可以在 https://firebase.google.com 的底部找到/docs/android/setup

All the available modules can be found at the bottom of https://firebase.google.com/docs/android/setup

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