Tutorials & Examples

See attached B4A project:

1. It takes an image (png or jpg) and convert it into a byte array
2. The byte array is converted into a Base64 String
3. The String is then converted into a QR Code...

 

Hello All
I might be a bit late to the show with this one, but I've been busy completing paid work. Hopefully new members will find this useful.

The B4i example can be found here...

 

Hi all. Interfacing B4A with Arduino is really very simple and you can create any kind of application.
This is a simple example:



Code B4A:

#Region  Project Attributes...

 

I am happy to announce that the both the paperback and electronic versions of the B4A tutorial and reference book “B4A Rapid Android App Development using BASIC” by Wyken Seagrave have now been...

 

ENGLISH:
Good morning,
I would like to share the free course "Preparing development environment for B4 IOS".
This course helps prepare the B4I development environment and the MAc to start...

 

Hello Forum,

in this Example i want to show you, how to use the ASTabMenu togehther with the xCustomListView, to handle a lot of Tabs without getting into layout problems...

 

The new resumable subs feature, introduced in B4J v5.50, B4i v4.00 and B4A v7.00 (to be soon released), makes it simpler to work with large data sets with minimum effect on the program...

 

Hello,

I've been working with Firebase's realtimedatabase this week. There is no example yet of how to create rooms and send messages, but it is important for anyone who wants to make a chat in...

 

Edit: widgets are handled with receivers now. See the attached example.

This tutorial will explain how to implement your own home screen widgets (also named App Widgets).

It is important...

 

Hello everyone,

First of all, I want thank Erel, DonManfred and KMatle because a lot of the codes for them.

In this example (Select an image from gallery and display it, Resize the image, Save...

 

Maybe this info can be useful to someone.
Normally from B4A AVD Manager it's not possible to start more instances of the same AVD normally.
We get a Warning that executing many times the same...

 

Hi all. In this example we have Raspberry Pi Rasbian and Android App ( communicate via BlueTooth ).

Through Android we give the command to access and turn off/on the LED, and from the Raspberry...

 

For the first time I try to make my apps multilingual and found this very useful helper. But I prefer to use CSV files (not excel) for the translations. So I combined it with this...

 

Hi all.
I've been looking at my old sources and found this example, and now I'm going to share it with you.

this example size is 14mb+ because have 200+ audios example.
The example use CLV with 2...

 

Thanks @Erel for free version that I plan to buy but donate instead.

I'll share my B4A knowledge in Thailand, your great product must popular, later.

PHP is well known for web developer...

 

Hello All
After thinking about it yesterday and having a quick chat with Erel, I decided that my previous long list examples were not basic enough for newer B4X developers, so I put together a...

 

Hello all,
Here is a quick video to show how simple it can be to transfer your B4A projects to B4J when using XUI. It's been on my mind all days now, so I thought I would give it a go and also...

 

For anyone who has problems connecting b4a to Xiaomi mobile phones, I make the link available where I found the Google usb driver to connect xiaomi mobile phones to b4a via usb. Download the...

 

v14.2 - October 15, 2026 - https://www.b4x.com/android/forum/threads/b4a-v14-2-is-available-for-download-r8-optimizer.172285/

• Intermittent "signature does not match..." error in...

 

Your app has been removed on Google Play.
Sample code for those who have previously installed the application not to use it again.

Sub Globals
    Dim job1 As HttpJob
    Dim xui as XUI
End...