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...

 

Have never done a B4A "wrapper" before making use of JavaObject only and thought I would see if I could get the PieChart of mpAndroidCharts implemented by using B4A's JavaObject only...

 

This simple function converts Markdown-formatted text so that it can be used as CSBuilder.

This is particularly useful if, for example, you have created a text in MS Word with bold and...

 

Well,

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

 

B4A v13.0+ should be used with targetSdkVersion 34+.

Android 14 continues the longtime trend of making services less flexible and more difficult to use (converging to iOS background tasks...

 

[B4X] [XUI] AS Onboarding [Payware]

AS Onboarding is a view you can use to attract first-time users when they land on your app. Or to present new features after a major update, with pictures and descriptions. Or to collect user data at the 1st start of the app, many things are possible. The View is modular and can also be...

www.b4x.com

In this example I show how you can easily change the theme e.g. from a dark theme to a light one and how to...

 

Simple example of a foreground service that keeps the process running in the background. The current location is shown in...

 

well hi too all .
As the title suggests, I want to teach you how to upload photos
I had searched a lot about it myself and had not found any results. By changing other people's codes, I was able...

 

This is a module base on CustomListview, all function same with CustomListview I call it CustomCardView. Hope this help.

For I = 0 To 5
'(the 47%x is cardview width, and the 45%y is the...

 

[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

Perform a function call.
You can call Postgres functions as Remote Procedure Calls...

 

This is a modified example, based in the original example from @Erel.
The previous example only make purchases.
This new example utilizes the Google Play Billing library v.7, changes...

 

This is just another example based on the ManageExternalStorage class provided by @agraham.
It is a response to this question.

B4ARepositoryWriter - writes a text file to an...

 

Just a simple example with a link to a file stored in File.DirInternal.

Required Archiver library.

This is a response to this thread.

 

I have just managed to install B4A and make it run (including B4ASdkManager) on my Xubuntu 18.04 and, since I have lost two days and one night putting things together, I thought it will be a good...

 

This is just a proof of concept to show that Device A behave like a server hosting a database and Device B connects to it accessing the "shared" database. It is a response to this question...

 

Based on the example found at: https://www.b4x.com/android/forum/threads/spinner-font-typeface.27513/#post-159552

Here a short example to change the spinner after added the values:

Sub...

 

I'm just trying to add a background image to the 4x1 widget from the following excellent thread...

 

Not sure if this can be considered a Tutorial, my first attempt.
Lately I started to play with Widgets, mostly for curiosity.
The main problem I encountered was how to design the Layout to make it...

 

Hi all,

i have updated my webpage and decided to add a tutorial section.

My first tutorial is a simple calculator (+,-,*,/) there is a video tutorial incl. Source code on my site.

I will upload...

 

[B4X] [XUI] AS FloatingActionMenu

This view makes it quick and easy to let the user make an action. You need: AS_FloatingPanel I spend a lot of time in creating views, like this and to create a high quality view cost a lot of time. If you want to support me and further views, then you can do it here by Paypal or with a...

www.b4x.com

In this example, I let the AS_FloatingActionMenu open over an item that is in a list, no matter...

 

[B4X] [XUI] AS TextFieldAdvanced - Title, Information, Counter, Password, Button, Prefix, Suffix, Icons, Multiline

With this view you can quickly and easily add good looking text fields, with title and or bottom text. Additionally you can make the TextField a button, so that you can open menus, but still keep the design of the text fields. The view speeds up development because you don't have to worry about...

www.b4x.com

From version 1.41 there...