Android Question Push notification - Sending to one device (with the new Firebase API).

davemorris said:

Hi, Guys

Some old posts on the forum suggest that to send a message to a specific device you replace the topic string in the Send() sub with the recipient's device's token.

As I understand the code from Erel's tutorial [B4X] Firebase Push Notifications 2023+ I replace the topic string (originally "general") with the target device's token (i.e. something like "dj7Wz7ukQYe83L-fP4.......")

Sending to a single device:

Private Sub Send (topic As String, title As String, body As String)
    Dim Token As String = GetTokenValue(ServiceAccountFilePath)
    Wait For (SendMessage(topic, title, body)) Complete (Success As Boolean) 'B4A - commend if not needed
    Wait For (SendMessage("ios_" & topic, title, body)) Complete (Success As Boolean) 'B4i - comment if not needed
    ExitApplication
End Sub

Private Sub SendMessage(Topic As String, Title As String, Body As String) As ResumableSub
    Dim Job As HttpJob
    Job.Initialize("", Me)

The simple question is "Is this correct?" or should (with the latest Firebase API) it be done another way.

However, I did try it and it did not work.

Kind regards
Dave

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davemorris said:

Thanks for the response but this appears to be a "work around" as each device must subscribe to a topic which is its own Token ID.

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DonManfred said:

You can just use the usertoken in the Request to send a Message to this specific ID. NO NEED to use registertopic.

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Sub Process_Globals
    Private Const ProjectId As String = "pushtest2023" ' Taken from firebase project settings.
    Private ServiceAccountFilePath As String = "C:\Projects\B4j_DEV\FCMPush\FireBaseKeyFiles\pushtest2023-firebase-adminsdk-fbsvc-ff4b7ad120.json"
    Private Token As String
End Sub

Sub AppStart (Args() As String)
   
    Dim deviceID As String = "dj7Wz7ukQYe83L-fP4WuZl:APA91bE0NQJtZKbauGBoBEENrigNPEAciGodyMHSLPApYdVMZ-Z58kjU88zLnRHKaxiwoiRxv7HaloIWNzLXf3pLswi6U26b14eyTYrWGKXZR9Gc1_naXik"
   
    Send("general", "this Is the new 012 title", "And this is the new 012 body")

'    Send(deviceID, "Title 001", "Body 001")


    StartMessageLoop
End Sub

DonManfred said:

Guess ýou need to change the sending code NOT TO USE a topic but instead use token.

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DonManfred said:

As written above i do register the devicid as a topic too.
In this case i can use the sendingcode unchanged. for your usecase you need to change the sending-code first to be able to send to a token.

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