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Asked: 2026-06-17T06:36:48+00:00

I did not understand what should be in the variable registrationId registrationId=? Result result

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I did not understand what should be in the variable registrationId

registrationId=?
Result result = sender.send(message, registrationId, 5);

Can someone explain to me?

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  1. Editorial Team

    What is registrationId?

    Google Doc says : “An ID issued by the GCM servers to the Android application that allows it to receive messages. Once the Android application has the registration ID, it sends it to the 3rd-party application server, which uses it to identify each device that has registered to receive messages for a given Android application. In other words, a registration ID is tied to a particular Android application running on a particular device. “

    You can think registrationId as a device token which is specific to the device, a unique identification for the device. This unique identification token or registrationId will help you to send message to the specified device only.

    When you are registering GCM service from the android app, at that time registration process returns this unique id which is known as a `registrationId.

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