How to check the delivery status of Firebase message sent to an Android application? [duplicate]

Answer 1

Though there is no API so far also I could find out. I have tried a workarond. From the server side PHP I am sending an FCM message. Let me present how I have handled this in PHP.

$fcm_return = fcm_message_send($message);
$fcm_return_JSON = json_decode($fcm_return, true);
echo $$fcm_return_JSON['success'];

As I am sending a message to one device, I am comparing return with 1. Based on this you could further implement your logic.

Answer 2

Update:

The Diagnostics Tool has been removed since Nov. 30, 2017:

You can no longer access FCM diagnostics data in the Play Console.

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Confirming what @user7410521 said in the comments section. There is currently no available API to make use of the message_ids/multicast_ids to retrieve the details of the delivery status of the message sent, other than using the FCM Diagnostics Page. Do also keep in mind that the Diagnostics page is only usable when the app is already published (for Alpha testing or later).

I noticed that you included the delivery_receipt_requested parameter in your payload. Receiving the a message confirmation should be enough to determine that the device received the message.