When onNewToken is called in Firebase?

Public Method Summary voidonDeletedMessages() Called when the Firebase Cloud Messaging server deletes pending messages.voidonNewToken(String token) Called when a new token for the default Firebase project is generated.FirebaseMessagingService – Google firebase.google.com › docs › android › com › google › firebase › messaging

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What is Firebase instance ID?

Firebase Instance ID provides a unique identifier for each app instance and a mechanism to authenticate and authorize actions (example: sending FCM messages). Instance ID is stable except when: App deletes Instance ID. App is restored on a new device. User uninstalls/reinstall the app.

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What is Firebase messaging 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.

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