Migrating from gcm to fcm on android

Question

I want to migrate from gcm to fcm in android app. Do I need to send push notification to old users of the android app from gcm or i can send it through the new fcm from server?

FCM is working fine I'm able to receive push notifications on my device through fcm but I'm not able to send push notifications to old GCM registration tokens from FCM console.

Below is the code I've added to my manifest file for fcm to work-

<uses-permission android:name="com.google.android.z.permission.RECEIVE" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<application>
    <service
        android:name=".view.activity.MyFcmListenerService">
        <intent-filter>
            <action android:name="com.google.firebase.MESSAGING_EVENT" />
        </intent-filter>
    </service>

    <service
        android:name=".view.activity.MyInstanceIDListenerService">
        <intent-filter>
            <action android:name="com.google.firebase.INSTANCE_ID_EVENT" />
        </intent-filter>
    </service>
</application>

Answer 1

I think you can send it through FCM. To know more about FCM you can check the documentation for frequently asked questions about GCM to FCM. Also if you are starting to migrate from GCM to FCM the you can follow this tutorials:

• Migrate a GCM Client App for Android to Firebase Cloud Messaging

• Migrating to FCM from GCM

Also for more information, you can check this SO question.