Android Question Help with Error DatabaseReference.Initialize en Firebase Realtimedatabase

[Alex Guerrero]

Hello, I am testing the example of Firebase Realtimedatabase and I have the following error, please can you help me, thanks in advance.

Can you help me with the method : Initialize, which would be the correct parameters according to my structure.

Dim ref As DatabaseReference
    ref.Initialize("Reference",realtime.getReferencefromUrl("https://tu.garage.com-8b2a8.firebaseio.com/") ,"midata")

Perform the installation according to https://www.b4x.com/b4a.html#installation

I have Win 7, B4A 8.0, Java 1.8.0_161, android-27
I install android with Sdk Manager, as you recommend it
I have enabled permissions in firebase

Text translated with google.

 

[Alexander Stolte]

I recommend you to watch my tutorial to understand how the RealTime Database works.

This Tutorial includes:
-create rooms
-send messages to it

with this knowledge you can start.

 

[Alexander Stolte]

and in this tutorial i explain how to get the last message in the database. After this Tutorial you know how to get values from the database to your phone.

 

[DonManfred]

I install android with Sdk Manager, as you recommend it

Can you please post a Screenshot from the B4A SDK Manager?
Post a Screenshot of your Paths in B4A too -> Tools Configure Paths

 

[Alex Guerrero]

I have solved in part by adding the following lines.

    #AdditionalRes: ..\resource
    #AdditionalJar: com.android.support.constraint:constraint-layout
    #AdditionalJar: com.google.android.gms:play-services-base
    #AdditionalJar: com.google.firebase:firebase-core
    #AdditionalJar: com.google.firebase:firebase-database

My specific question is what is the correct way to initialize "DatabaseReference": 2 or 3 parameters and please expand the description if possible of the parameters. In the same way, which is the best way to refer to the database with "FirebaseDatabase".

Sorry but I have problems with understanding the connection to a BD NoSQL.

 

[Alexander Stolte]

just look into the 2 tutorials, the structure is the same ...

 

[DonManfred]

My specific question is what is the correct way to initialize "DatabaseReference"

As you are using the json file from firbase your app already know the Database. You just can use

    Dim servicio As DatabaseReference
    servicio.Initialize("servicio",realtime.getReference2("servicio/"),"servicio/")

"servicio" is the Event-Prefix for the Events
The 1st "servicio/" is the Path you want to get
The 2nd is a Tag which you can use