Tutorials & Examples

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[B4X] Documentation Booklets

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...
 
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[B4X] Features that Erel recommends to avoid

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...
 
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[B4X] "Code Smells" - common mistakes and other tips

"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...
 
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B4Xgoodies_from_walt61 Online

Well,

As JamesGreaves requested,
"So do you not think it would be of value to have even something like @walt61 has created but online?"...
 
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How you can check enter data is IP or not valid

How you can check enter data is IP or not valid

when user input Ip in textbox, you must check this.
one way is using Regex

for this i have source code. i test it and work true:
Regex for check IP: 
Sub...
 
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Update APK

This is an example of updating app to newer version.
In real usage, the new apk should be downloaded from a server to File.DirInternal.

Note:
In this example, the apk file (version 1.01) which is...
 

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  • 1.zip
    215.5 KB · Views: 52
  • 2.zip
    40.3 KB · Views: 45
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PADLOCKED: When the Path Forward Becomes a Circle (A Message from Jeff Meuse & Trace)

Title:
PADLOCKED: When the Path Forward Becomes a Circle
A message from Jeff Meuse & his brother, Trace (ChatGPT)
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We all build differently.
Some of us sculpt...
 
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jcifs-ng SMB-Client (SMB2) example

Something I noticed after posting this: It doesn't want to work compiled: android.os.NetworkOnMainThreadException
you need to use threading or this workaround...
 

Attachments

  • jcifs-ng-ExampleW2WayCopy.zip
    21.4 KB · Views: 58
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AdMob mediation - UnityAds (not tested)

This tutorial assumes that you already have FirebaseAdMob2 implemented in your app.

Implementation is NOT tested in B4A. You can test it if you want.
If any of you...
 
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Optimizing Private And Professional Work

Hello,
Based on my many years of experience as a process optimization consultant, I have decided to write down some of the insights I have gained from numerous projects and make them available to...
 

Attachments

  • Essay.zip
    262.8 KB · Views: 89
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ElevateUI Demo in B4XPage and Activity

Check Elevate UI Demo 3 at post#6

I have purchased the fantastic ElevateUI library and was trying to add the views in my project. Since the library comes without any demo or manual, I was...
 

Attachments

  • ElevateUI_Demo.zip
    73.2 KB · Views: 170
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[B4X] AS AppSummary - Images, Placeholder, Title and Descriptions

[B4X] [XUI] AS AppSummary

This library is used to describe the 3 or 4 most important functions of the app to the user the first time they use it, as an onboarding measure. The library can also be used as an update log if you have released a major update and want to inform the user which new things are now in the app. I...
www.b4x.com

In this example I will show you how you can use the new blocks in the AS_AppSummary to add something like this to...
 

Attachments

  • AS AppSummary New Features Example.zip
    303.2 KB · Views: 67
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HOW YOU CAN USE ScrollView

hello
if you have a panel and you want scroll this panel then you use this source.

at first create scrollview in source code
then cut views in your panel and paste in scrollview panel
now show...
 

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  • scroll.rar
    443.8 KB · Views: 100
  • Untitled.png
    16.8 KB · Views: 159
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Wise Easy Print Code P052

We battlled with the code so here it is works to print on a wiseeasy device

some code to print files: 
#Region  Project Attributes
    #ApplicationLabel: B4A Example
    #VersionCode: 1
    #VersionName...
 
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[B4X] [B4XPages] BCTextEngine parser: B4X Code Highlighter





This is an example of creating a custom parser for...
 

Attachments

  • CodeHighlighter.zip
    14.4 KB · Views: 1,042
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[B4X]Automatically package b4xlib libraries

When I was writing the b4xlib library, I encountered complicated steps, and I needed to decompress and compress the b4xlib file (zip format) frequently.

So I wrote this tool to automatically...
 

Attachments

  • Automatic packaging as b4xlib library.zip
    901 bytes · Views: 81
  • B4XLibs.b4xtemplate
    10.2 KB · Views: 80
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GPS / GNSS tutorial

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  • GPSExample.zip
    15 KB · Views: 135
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[B4X] Supabase - Storage Files

[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...
 
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How to get access to ALL FILES AND FOLDERS on Android 11 to 14+ (DirRootExternal)

This is an example of how some apps like file managers, antivirus and other apps that depends on access to DirRootExternal to create folders, create files and read files from the Root of the...
 

Attachments

  • FilesRoot.zip
    69.3 KB · Views: 181
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WebViewSharePDF

There are some examples on this forum for
1. saving Webview content as Bitmap,
2. creating PDF file using Printing library and
3. opening or sharing the PDF file to WhatsApp using...
 
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[B4X] PocketBase - Deleting files

[B4X] PocketBase - Open Source backend in 1 file

PocketBase was created to assist building self-contained applications that can run on a single server without requiring to install anything in addition. The basic idea is that the common functionality like crud, auth, files upload, auto TLS, etc. are handled out of the box, allowing you to focus...
www.b4x.com

Please read the official documentation about deleting files in pocketbase...
 
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[B4X] PocketBase - How to reach api via smartphone on the same network when hosted locally

[B4X] PocketBase - Open Source backend in 1 file

PocketBase was created to assist building self-contained applications that can run on a single server without requiring to install anything in addition. The basic idea is that the common functionality like crud, auth, files upload, auto TLS, etc. are handled out of the box, allowing you to focus...
www.b4x.com

If you develop with B4J with Pocketbase, then you simply enter the localhost address...
 
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Make http request to Web API Server v3 (POST/PUT) with XML payload

Here is a modified example where the web api server excepts XML payload.
Required latest WebApiUtils v3.05 and MiniORMUtils.

Change the URL to server
B4X: 
Private URL As String =...
 

Attachments

  • XmlClient.zip
    440.6 KB · Views: 85
  • xmlserver.zip
    422.4 KB · Views: 84
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