B4J Tutorials

alwaysbusy · May 21, 2020

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...

Mashiane · Apr 16, 2021

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...

Daestrum · Nov 24, 2017

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...

Mashiane · Dec 11, 2019

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...

Mashiane · Apr 13, 2021

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...

zolive33 · Jan 30, 2014

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.

agraham · Jan 29, 2019

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...

juventino883 · Sep 27, 2020

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...

stevel05 · Nov 21, 2013

To help with my own learning I have played with JavaObject and JavaFX to create linecharts.

Here are the 3 examples I have made I have ported the code directly from the Oracle...

IndieDev · Apr 3, 2021

Hi,
Have just finished making a Color Picker app for Windows & Mac (B4J v8.90 & jdk-11.0.1).
Thought someone might find this useful (specially newbies).

(Just my...

JordiCP · Mar 21, 2021

From time to time, jOpenCV examples will be referenced in this tutorial. You can find the donwload link in the first post of the jOpenCV library thread
Syntax: when referencing...

JordiCP · Mar 21, 2021

From time to time, jOpenCV examples will be referenced in this tutorial. You can find the donwload link in the first post of the jOpenCV library thread
Syntax: when referencing...

rtek1000 · Mar 19, 2021

Attached project code:

B4X:

#Region Project Attributes
    #MainFormWidth: 600
    #MainFormHeight: 600
#End Region

Sub Process_Globals
    Private fx As JFX
    Private MainForm As Form...

Peter Simpson · Feb 26, 2021

Hello to you all,
I decided to recreate this simple but effective game example, the game is based on the B4XPages library. The game is designed for hand, eye and memory coordination, so I called...

Peter Simpson · Mar 4, 2021

Hello to you all,
Here is an extremely simple example on how to easily recreate Google Trends results using B4XPages with B4j and the xChart library. In this example I used Google...

Mashiane · Jun 12, 2018

Ola

So me runs into this nice charting library, morris chart. Me see a nice donut. Me likes donut.

Their examples are quite nice and straight forward and easy to implement...

Erel · Nov 8, 2020

OkHttpUtils2 methods are designed to be called on the main thread. This is the case in all platforms and configurations, except of B4J server solutions.

Starting from jOkHttpUtils2 v2.95 it is...

tchart · Jun 18, 2015

I thought I would share how I requested and installed a SSL certificate for my B4J server.

In my case I used namecheap.com to purchase a $9 SSL certificate. I already had a domain name and a...

Peter Simpson · Feb 17, 2021

Hello to you all,
Here is a simple example on retrieving data from a REST API requested using the JSON Generator (you could also use http URL download), the same JSON library is also used to parse...

Peter Simpson · Feb 8, 2021

Hello All
Here we have an simple example on how you use your desktop OS (in this example Windows) and public internet IP address in conjunction with OpenWeather API, this is just a simple example...

B4J Tutorials

Show only:

[BANano] Live Code Swapping in v5 preview

[BANano] How BANano.GeoLocation helped us with developing Seeking.Shelter & GPS locations querying from a database

Multiple entry jar

[BANano] MD5 Encryption - Getting the Md5 Hash of a string

[BANano][Database.Show] - Viewing a Music Store SQLite Database

B4J on linux

[B4X] How Resumable Subs work

b4j max upload file size with nginx

Using JavaObject and JavaFx - LineChart

Attachments

PK ColorPicker for Windows and Mac

Attachments

jOpenCV Tutorial 2 - Image & Video (with VideoCapture) acquisition, and conversions to/from Mat objects.

jOpenCV Tutorial 1 - Syntax rules, Helper methods and Basic types

USB Serial Port + AsyncStreams + B4XBytesBuilder

Attachments

✅ [B4X] [XUI] [B4XPages] B4J 'Erel Says' hand, eye memory game - Newer developers

? [B4X] [XUI] [B4XPages] B4J recreating Google Trends results with xCharts - Newer developers

[ABMaterial]: Me like Donuts

[server] jOkHttpUtils2 - server version

B4J Server: Requesting and Installing SSL Certificate

✅ [B4X] [XUI] [B4XPages] Simple B4J stock ticker app code using JSON REST API - Newer developers

? [B4X] [XUI] [B4XPages] Using B4J public internet IP address to create a BASIC weather app - Newer developers

B4J Tutorials

Attachments

Attachments

Attachments

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