B4J Tutorials

Ola..

Update: 12 July 2021: Here is a working example with jRDC2 MySQL...

 

Main concepts and reading MS Excel workbooks with XLUtils: https://www.b4x.com/android/forum/t...-and-write-ms-excel-workbooks.129969/#content

Writing workbooks is...

 

Hello to you all,
Welcome to Sheldon Coopers and Amy Farrah Fowlers fun with flags

Here is a simple example on using B4XPages with both an SQLite database and also a CSV file with multiple...

 

XLUtils v1.05 adds support for conditional formatting.

A conditional formatting element is made of the applied range and one or more rules. A rule is made of a formula and...

 

You are probably familiar with the online libraries index.
The table has a column for each of the platforms. This structure is useful as there are many cross platform libraries.

The task...

 

Creating new workbooks based on existing workbooks saves a lot of work and also allows adding features that are not directly available in POI / XLUtils, such as charts.
Templates are regular...

 

Ola

Download

Recently a WebApp built using BANano+Vuetify was created to enable one to explore Walts B4XGoodies.

The Creation -...

 

EDIT: If the message length is equal to the pad length, you have to pad to the next multiple. E.g. 16 bytes would be padded to 32 because one would not know how long the message was because the...

 

Here's an PHP/HTML example:

- create OTP credentials (including Base32 encoding)
- show a html page with these credentials and a generated QR-Code
- this code can be scanned and used with all...

 

Good day

The LM (Learner Material) is freely available for learning BVAD3 even if one cannot make it for the online meeting. Join and get access to it now, ...

 

Ola

Class - Css - Cssutils
Class - Database - Jrdc
Class - Database - Jrdc2
Class - Database - Keyvaluestore B4j
Class - Date/time - Janotherdatepicker
Class -...

 

Ola

Fortunately one can access the b4xgoodies via a WebApp on their mobile devices. In this video below, we detail how one needs to:

Steps to reproduce on your Mobile Device

1. Visit...

 

Hi all,

The upcoming new version of BANano (v5) will allow you to use one of the greatest features of B4X: Live Code Swapping!

This has always been a very productive and unique tool we have at...

 

Ola

Seeking.Shelter is an app for people in distress. It helps one find the police stations, courts, shelters, clinics and hospitals around South Africa.

One of the WebApp reviewers made a...

 

You can put more than one java application in a single jar, but still be able to run them as individual applications.
The main advantage is the space it takes up.
For example, a simple non-ui...

 

Ola

Was recently requested to look at this by a friend, for encryption

1. Download this repo here to get the md5 javascript resource

https://github.com/blueimp/JavaScript-MD5

2. In your...

 

Ola

As you might be aware, one has been busy working on Database.Show, a BANano+Vuetify Database Viewer, Documentor, CRUD thingy.

We have just closed off one of the milestones, MySQL and...

 

hi,

After few adjustments B4J works fine on Ubuntu.
See picture;-)

If you want, I'll write a tutorial in french.
Looking for a translator .... If someone want it!

see you soon.

 

This document is intended to add a little understanding as to how Resumable Subs actually work under the bonnet and is intended as a complement to how they are used as Erel explains in his...

 

Hi, today I have lost some time testing a B4j server app in a VPS, my app was supposed to help upload big files to the server. Locally, everything was working as expected, but when I have...