Similarly to how GCM works, the FCM token can change due to token-rotation . Note: the token rotation is a rare-event. Don’t expect to see it often. But still, if you care about the token you should implement onTokenRefresh() to be informed of changes.
Read moreHow often do firebase tokens change?
Every time the device token is changed , It is reflected in onTokenRefresh() method. For getting the device token when it is changed, we can call this method to get the refreshed token. and to get the device token at any time we can use FirebaseInstanceId. getInstance().
Read moreWhat are FCM tokens?
An FCM Token, or much commonly known as a registrationToken like in google-cloud-messaging. As described in the GCM FCM docs: An ID issued by the GCM connection servers to the client app that allows it to receive messages . Note that registration tokens must be kept secret.
Read moreHow long is FCM token valid?
It doesn’t expire though.1 Şub 2017
Read moreWhat is FCM device token?
Firebase Cloud Messaging (FCM) is a messaging solution that lets you reliably send messages at no cost to both Android & iOS devices . Using FCM, you can send data payloads (via a message) to a device for a specific application. Each message can transfer a payload of up to 4KB to a client.
Read moreHow do I get Firebase tokens?
Do the following in your web or mobile app:
Read moreWhat is FCM token in iOS?
Getting FCM token By default, the FCM SDK generates a registration token for the client app instance on initial startup of your app . Similar to the APNs device token, this token allows you to target notification messages to this particular instance of the app.
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