在android上从gcm迁移到fcm

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?

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 .

Answer 2

I searched a lot but couldn't find a satisfactory answer. So, I applied this fix.

I am continuing using the old method I was using to send push notifications to GCM users and for the users who registers through FCM, I am able to send them push notifications through FCM or Firebase Notification console.

PS You can't send push notification to GCM registration tokens through FCM.

Answer 3

I have done POC on this same scenario, and what i observed is given below

"There is no code change require from client side when you trying to migrate GCM to FCM, and i have tested in both Android and iOS it's working fine. Only change require to do proper configuration in FCM console (ie give correct bundle id and project id (senderid))"

Answer 4

Actually it does work FCM and GCM are the under same hood. A token for GCM works for FCM as well.

GCM tokens retrieved via GoogleCloudMessaging.register() or InstanceID.getToken() will continue to work in FCM without any modification or renewal.

All you need to do is change your client side implementation as mentioned here . and update your server endpoint to fcm.googleapis.com/fcm/