Android Example [B4X] Supabase - Realtime Broadcast

[B4X] Supabase - The Open Source Firebase alternative

Supabase is an open source Firebase alternative. It provides all the backend services you need to build a product. Supabase uses Postgres database with real-time capabilities. Basically, supabase provides an interface to manage postgres database that you can use to create table and insert, edit...

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Send and receive messages using Realtime Broadcast

Broadcast | Supabase Docs

Send and receive messages using Realtime Broadcast

supabase.com

Setup

[B4X] Supabase - Realtime

https://www.b4x.com/android/forum/threads/b4x-supabase-the-open-source-firebase-alternative.149855/ This is a very simple tutorial on how to use the Realtime module. A more detailed tutorial is coming soon. Step 1 Click in your project on "Project -> Build configurations -> Conditional...

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Listening to Broadcast messages

    Realtime _
    .Channel("Room1","","") _
    .On(Realtime.SubscribeType_Broadcast) _
    .ReceiveOwnBroadcasts(False) _
    .AcknowledgeBroadcasts(False) _
    .Subscribe

Sending Broadcast messages

Channel1.SendBroadcast("cursor-pos",CreateMap("x":"198","y":"50"))

Self-send messages
By default, broadcast messages are only sent to other clients. You can broadcast messages back to the sender by setting Broadcast's self parameter to true.

    Realtime _
    .Channel("Room1","","") _
    .On(Realtime.SubscribeType_Broadcast) _
    .ReceiveOwnBroadcasts(True) _
    .Subscribe

Acknowledge messages
You can confirm that Realtime received your message by setting Broadcast's ack config to true.

    Realtime _
    .Channel("Room1","","") _
    .On(Realtime.SubscribeType_Broadcast) _
    .AcknowledgeBroadcasts(True) _
    .Subscribe

Events

Private Sub Realtime_BroadcastDataReceived(BroadcastData As SupabaseRealtime_BroadcastData)
    
    Log("Broadcast data for event: " & BroadcastData.Event)
    Log("Data:")
    For Each k As String In BroadcastData.Payload.Keys
        Log(k & ":" & BroadcastData.Payload.Get(k))
    Next
    
End Sub