Tutorials & Examples

The B4X documentation booklets are available in PDF format, Download Link.
All files are included in the zip file in the link above, pdf booklets and all the source code.

You can also...

 

Many things have changed in B4X and also in the underlying platforms. I will try to list here all kinds of (old) features that have better alternatives.
B4X is backward compatible so these...

 

"Code smells" are common patterns that can indicate that there is a problem in the code. A problem doesn't mean that the code doesn't work, it might be that it will be difficult to maintain it or...

 

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

 

Regular expressions are very powerful and make complicate parsing challenges much easier.
This short tutorial will describe the usage of regular expressions in Basic4android.
If you are not...

 

Great tutorial about building MQTT topic:

MQTT Topics, Wildcards, & Best Practices - MQTT Essentials: Part 5

MQTT Topics, Wildcards and Best Practices: We explain MQTT topics, topic wildcards, MQTT $SYS topics and best practices of topic naming.

www.hivemq.com

 

Well,

As JamesGreaves requested,
"So do you not think it would be of value to have even something like @walt61 has created but online?"...

 

Polyline in JPCT-AE is unable for using by standart methods. But, by Ricardossy1, in his post: Ricardossy1 post, was described way for solving problem.
I was needed for Polylines in my...

 

Hello All,
If you're not experienced with using xCustomListView (xCLV) with Lazy Loading (LL) when it comes to loading long lists of data, then I strongly suggest that you read the following post...

 

Based on the original example: https://www.b4x.com/android/forum/threads/b4x-bitmapcreator-cross-platform-falling-sand-game.94276/

This is just a conversion from individual platform into...

 

(NFCRW has been Updated !)
In this project You can scan and write your Ndef or NFC tags Very simply,
(This project is for B4XPages)

The Principal codes ...

 

NFC v2.00 adds support for low level access to the NFC features. This allows reading and writing from NFC tags.

The NFC library provides three features:
- Reading Ndef tags based intent filters...

 

This is a calendar manipulation class based on @DonManfred 's explorations which you can find at...

 

This is a very old project which is unlikely to function correctly on newer versions of Android. The link to the project should still be active and if you want to use it for reference to...

 

The Launcher icon always shows as 48x48 dip, but when translated into pixels on screens with different resolutions, this can become 48, 72, 96, 144 or even 192 pixels square. You should ideally...

 

After the release of the new grandiose DJI library and the preliminary work of freedom2000 and JordiCP in this thread...

 

It's time to learn how to use MQTT: https://www.b4x.com/android/forum/threads/59471/#content
It is simple and powerful. In most cases MQTT is the best solution for low level networks. Low...

 

This demo is a slight modification of @klaus's B4XPages SQLiteLight2 demo...

 

Hello Community!
This is the second UI Example by XTools Group and more examples are on the way
You can find our first UI Example Here :

[UI] [B4A] Camping App UI Example + Source...​

 

Searching the internet I found a service that allows you to convert any google sheet into a json api, it has a free version that allows you to consult and add data, connecting to the api is quite...

 

Tasker is a pretty legendary app that allows you to automate everything on your phone:
https://play.google.com/store/apps/details?id=net.dinglisch.android.taskerm

Developer reference...

 

This is for advanced users only. Please see Erel's important cautions about using this approach below.

This post and examples demonstrate how to extend B4XPages to allow orientation...

 

As explained in this tutorial all store apps will soon be forced to target the latest SDK.

This means that we can no longer rely on the OS backwards compatibility features and need to...