firebase 消息传递组件在 android 工作室中不存在

Question

Getting error firebase messaging component is not present in android studio. I am using updated firebase messaging version

implementation 'com.google.firebase:firebase-messaging:21.0.1'

Answer 1

So, I was facing this issue and even ended up setting a bounty for it.

My problem was that I had just shifted to Multi-Modular structure from a single app module and started facing this issue.

I tried a few solutions:-

1. Registering the Firebase components explicitly

<service android:name="com.google.firebase.components.ComponentDiscoveryService" >
    <meta-data
        android:name="com.google.firebase.components:com.google.firebase.analytics.connector.internal.AnalyticsConnectorRegistrar"
        android:value="com.google.firebase.components.ComponentRegistrar" />
    <meta-data
        android:name="com.google.firebase.components:com.google.firebase.firestore.FirestoreRegistrar"
        android:value="com.google.firebase.components.ComponentRegistrar"/>
    <meta-data
        android:name="com.google.firebase.components:com.google.firebase.iid.Registrar"
        android:value="com.google.firebase.components.ComponentRegistrar" />
    <meta-data
        android:name="com.google.firebase.components:com.google.firebase.auth.FirebaseAuthRegistrar"
        android:value="com.google.firebase.components.ComponentRegistrar" />
    <meta-data
        android:name="com.google.firebase.components:com.google.firebase.database.DatabaseRegistrar"
        android:value="com.google.firebase.components.ComponentRegistrar"/>
</service>

2. Downgrading the google-service plugin

3. Switching between Firebase BOM and explicitly stating the version.

However, I finally resolved it by keeping all the Firebase dependencies in the App module and then inheriting it in the dynamic modules, by using "api.....", at the same time I also registered my dynamic modules in Firebase.

Answer 2

You need to extend ComponentDiscoveryService.

 <service android:name="com.google.firebase.components.ComponentDiscoveryService" >
        <meta-data
            android:name="com.google.firebase.components:com.google.firebase.analytics.connector.internal.AnalyticsConnectorRegistrar"
            android:value="com.google.firebase.components.ComponentRegistrar" />
        <meta-data
            android:name="com.google.firebase.components:com.google.firebase.firestore.FirestoreRegistrar"
            android:value="com.google.firebase.components.ComponentRegistrar"/>
        <meta-data
            android:name="com.google.firebase.components:com.google.firebase.iid.Registrar"
            android:value="com.google.firebase.components.ComponentRegistrar" />
        <meta-data
            android:name="com.google.firebase.components:com.google.firebase.auth.FirebaseAuthRegistrar"
            android:value="com.google.firebase.components.ComponentRegistrar" />
        <meta-data
            android:name="com.google.firebase.components:com.google.firebase.database.DatabaseRegistrar"
            android:value="com.google.firebase.components.ComponentRegistrar"/>
    </service>

Answer 3

I am also facing same issue with firebase messaging:

Caused by: java.lang.NullPointerException: Firebase Messaging component is not present at com.google.android.gms.common.internal.Preconditions.checkNotNull(com.google.android.gms:play-services-basement@@18.0.0:2) at com.google.firebase.messaging.FirebaseMessaging.getInstance(FirebaseMessaging.java:158) at com.google.firebase.messaging.FirebaseMessaging.getInstance(FirebaseMessaging.java:137)

project level gradle: classpath 'com.google.gms:google-services:4.3.13'

app level gradle: implementation platform('com.google.firebase:firebase-bom:30.2.0') implementation 'com.google.firebase:firebase-messaging' // Declare the dependencies for the Crashlytics and Analytics libraries // When using the BoM, you don't specify versions in Firebase library dependencies implementation 'com.google.firebase:firebase-crashlytics' implementation 'com.google.firebase:firebase-analytics' implementation 'com.google.firebase:firebase-messaging'

Answer 4

Just resolved for Firebase Messaging with

<service 
android:name="com.google.firebase.components.ComponentDiscoveryService" 
android:directBootAware="true" android:exported="false" >

<meta-data android:name="com.google.firebase.components:com.google.firebase.messaging.FirebaseMessagingRegistrar" 
android:value="com.google.firebase.components.ComponentRegistrar" />

<meta-data android:name="com.google.firebase.components:com.google.firebase.installations.FirebaseInstallationsRegistrar" 
 android:value="com.google.firebase.components.ComponentRegistrar" />
</service>