Tutorials & Examples

After making more than 58k posts in the forum, I decided that it is a good time to build a list of tips and common mistakes. 12 points, in no particular order:

1. Separate code from...

 

I've just wasted an hour trying to understand why a desktop program that I'm using for many months failed to upload a file to a FTP server.
I realized that the only thing that was recently changed...

 

You download a project from the forum and when you run it, you get an error message similar to:

B4A Version: 10.2
Java Version: 8
Parsing code.    (0.11s)
Building folders structure...

 

While analyzing a Crashlytics crash report of a small app of mine I was surprised to see the following error:

Fatal Exception: java.lang.NumberFormatException
For input string...

 

The purpose of this tutorial is to cover the various communication options available for B4X developers.

Will start with two important utilities:

• AsyncStreams...

 

This is a B4i and B4A example, which demonstrates various external files related tasks.

The behavior is not exactly the same as the platforms capabilities and behavior...

 

This guide is relevant for B4A, B4i and B4J.

There are all kinds of tools and libraries available for the different text based formats. The purpose of this guide is to organize the available...

 

The next code add the funcionality in b4x to capture the click & longClick using Touch, in case of b4j add the option to fire the longClick using the Right Mouse Click or the secondary mouse...

 

[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...

www.b4x.com

This is a very simple tutorial on how to download a file and show the progress in a...

 

[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...

www.b4x.com

This is a simple B4X chat example with supabase as backend.


Setup...

 

[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...

www.b4x.com

Supabase Storage offers the functionality to transform and resize images dynamically. Any...

 

[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...

www.b4x.com

This is a very simple tutorial on how to use the storage file options.

Upload File...

 

[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...

www.b4x.com

This is a very simple tutorial on how to use the storage bucket options.

CREATE...

 

[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...

www.b4x.com

Supabase now supports anonymous user login, the B4X library now too...

 

[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...

www.b4x.com

Share state between users with Realtime Presence...

 

[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...

www.b4x.com

Listen to Postgres changes using Supabase Realtime...

 

[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...

www.b4x.com

This is a simple B4X broadcast example with supabase as backend.

...

 

[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...

www.b4x.com

Send and receive messages using 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...

www.b4x.com

This is a very simple tutorial on how to use the Realtime module. A more detailed...

 

[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...

www.b4x.com

It is possible to create a new data record and return it directly.
Use the...