Tutorials & Examples

v13.4 - July 16, 2025 - https://www.b4x.com/android/forum/threads/b4a-v13-4-is-available-for-download.167803/

• New command line tools and prepackaged SDK.
• SDK handling...

 

Example of implementing a chat layout.
It is based on xCustomListView. The text is created with a hidden BBCodeView (BCTextEngine) and the bubble is drawn with BitmapCreator...

 

API documentation - B4a, B4i, B4J and B4R (i.e. B4X) Object Browser (which also includes Code Snippet Management)

Hi everyone,

As you may or may not be aware, I have embarked on a...

 

Hi every one and season's greetings,

(11-1-2020) New version of the tool with timestamp and "Transfered <Checkbox>"


When I program I am used to keep notes in my code to know...

 

Note that OkHttpUtils2, jOkHttpUtils2 and iHttpUtils2 are actually the exact same b4x library.

Starting from v2.90 it is very simple to initialize the internal http client with the 'accept all'...

 

Not exactly a tutorial or Android-only, but a hint to the community for those who like playing with home automation stuff, and possibly for others as well. I happened across this very nice device...

 

Hello,

i have searched for a long time for a fix for this, every time i have B4A on my second monitor on my mac, then the text was blurry and this was no fun to work with...

Now i have a fix for...

 

BitmapCreator (BC) continues to evolve. Version 4.5 update is a large update with several new drawing features.

Background

At its core BC holds an array of bytes that represent an image...

 

The HttpServer library is a new library, based on an open source project named Jetty. This library allows you to easily embed an Http server in your application.

Http server means that you...

 

B4XTable.SetData expects a List where each entry in the list is an array of objects with the data of a single row.

The data can come from any source you like...

 

Example was updated based on FileProvider class: https://www.b4x.com/android/forum/threads/class-fileprovider-share-files.97865/
See the above link if you are interested in sharing...

 

Using the NFC library you can read NFC tags formatted in NDEF form (NFC Data Exchange Format).
You can read more information about the internal process here: NFC Basics | Android Developers...

 

Android Support Library was implemented and maintained in the last 8 years by Google. It includes a wide range of features and it hides many of the differences between the various Android...

 

This is an extension to the MQTT chat room example: https://www.b4x.com/android/forum/threads/b4x-mqtt-chat-room.61568/#content
It is a chat room where one of the devices acts as a server...

 

Hello

I would like to share some observations with you all, is is based on https://www.b4x.com/android/forum/threads/background-location-tracking.99873/#post-628468

A problem that we all...

 

The "index pattern" is a pattern that you can see in many examples and libraries where resumable subs are used. It is a simple solution to avoid race conditions and unexpected states.

The...

 

Better to use: https://www.b4x.com/android/forum/threads/simple-progress-http-download.127214/#post-796463

The attached project includes a slightly modified version of HttpUtils2 and...

 

Starting from Basic4android v2.50 you can compile your project, or part of it to a regular library.

Why should I compile a library?

• Break large projects into several smaller (more...

 

I decided to become Google's darling. After a very old B4A app, that went perfect for many many years (API 8, targetSDK 14), was threatened to be thrown out of the app store, I decided to waste my...

 

The attached B4J example demonstrates how to implement lazy loading with editable items.

There are several interesting points...