B4J Tutorials

How create a Chat using B4J and Server Composer [ Socket ]

• By Waldemar Lima
• Oct 26, 2018

hello everyone !

It is with great honor that I present to you my tool for creating websocket & socket servers, it was developed using C ++ [libwebsocket, enet, winsock, lua_wrapper, scintilla and...

 

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Beginning Firebase Database in JavaScript: CRUD-ing around

• By Mashiane
• Oct 23, 2018

Hi there...

Anyway, this should not be long. Many moons I was requested to work on a firebase wrap for ABM. Im not there yet, but this should be a start. I'm still getting a hang of it and more...

 

Attachments

• firebase.txt

  9.1 KB · Views: 501

Last edited: Oct 24, 2018

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[jRDC2] Raspberry Pi MySQL accessed by B4J UI application using jRDC2

• By rwblinn
• May 27, 2016

Hi,

wanted to learn more about jRDC2. Let me share testing jRDC2 accessing a MySQL database, running on a Raspberry Pi (RPi), via a B4J UI application.

Raspberry Pi MySQL Setup

• ...

 

Attachments

• B4JHowToMySQLRDC.zip

  51.7 KB · Views: 762

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[abmaterial] How to remove the appname to access the web address?

• By Hanz
• Oct 4, 2018

hello,

abmaterial provides this: ipaddressort/appname/

Is there a way to have this: ipaddress/

If you run your abmaterial application and you enter the ip address of the server, you need to...

 

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Create Windows native executables (exe files)

• By Erel
• Dec 19, 2013

This tutorial is no longer relevant. Use B4JPackager11: B4JPackager11 - the simplest way to distribute UI apps

Spoiler

When you compile in Release mode the complete app is packed as an executable...

 

Last edited: Mar 26, 2020

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[B4X] [BitmapCreator] Creating a cross platform Tetris game

• By Erel
• Jun 17, 2018

Edit: XUI2D version of Tetris: https://www.b4x.com/android/forum/threads/xui2d-tetris.107698/

...

 

Attachments

• B4A_Tetris.zip

  184.6 KB · Views: 1,186
• B4i_Tetris.zip

  285.5 KB · Views: 899
• B4J_Tetris.zip

  177.1 KB · Views: 1,092

Last edited: Jul 16, 2019

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[ABMaterial] Using Cloudinary as CDN for your assets (v4.35)

• By alwaysbusy
• Sep 10, 2018

Using a CDN (Content Delivery Network) for your WebApp can be very beneficial:

The Benefits of using a CDN:

• Different domains. Browsers limit the number of concurrent...

 

Last edited: Sep 12, 2018

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[ABMaterial] For Dummies (beginner lessons)

• By Harris
• Jan 16, 2018

ABMaterial For Dummies​

This has often been asked for - so it is high time to produce a simple set of guidelines to help get you across the short...

 

Attachments

• about.jpg

  399.4 KB · Views: 1,539

Last edited: May 3, 2020

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Network + AsyncStreams + B4XSerializator

• By Erel
• May 15, 2017

This is the B4J version of this B4A example: Network + AsyncStreams + B4XSerializator
Note that B4XSerializator is cross platform, so it should be simple to use similar code to communicate...

 

Attachments

• NetworkExample.zip

  3.4 KB · Views: 1,229

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UI apps packaging - self contained installers

• By Erel
• Aug 2, 2015

It is recommended to use B4JPackager11: Integrated B4JPackager11 - The simple way to distribute standalone UI apps

Spoiler: Older tool

B4J Packager is a small utility that uses javapackager to...

 

Attachments

• B4J Packager.zip

  4.7 KB · Views: 2,538

Last edited: May 25, 2020

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My B4J Packager - an extended version

• By Starchild
• Jul 26, 2018

This "My B4J Packager" started as the B4Jpackager provided by Erel. I have added the text entry fields for the extra things like, Menu Group, JavaVM Options (to set memory requirements)...

 

Attachments

• MyB4JPackager v2-01.zip

  8.5 KB · Views: 432

Last edited: Oct 2, 2019

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[ABMaterial] Custom Component CustomChartJS

• By rwblinn
• Dec 4, 2017

Objectives
Create an ABM custom component to display line and bar charts.

The custom component build, CustomChartJS, is a minimal solution based upon the Chart.js project...

 

Attachments

• B4JHowToABMCustomChartJS.zip

  85.9 KB · Views: 518

Last edited: Jun 8, 2018

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[ABMaterial]: Sharing the goodness

• By Mashiane
• May 11, 2017

Article 1: Generic Excel Importer Class for your ABMUpload component

For my ABMaterial App, I needed a Ms Excel worksheet importer, so I decided to build one.

For this, you will need the...

 

Attachments

• clsExcelmporter.bas

  12.3 KB · Views: 628

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Another Blockchain example

• By stevel05
• Feb 15, 2018

Here is a port of the code presented as a tutorial here: https://medium.com/programmers-bloc...chain-java-tutorial-from-scratch-6eeed3cb03fa

It includes examples of...

 

Attachments

• BlockChainTest.zip

  7.8 KB · Views: 503

Last edited: Apr 3, 2018

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SQLite Triggers: Creating Audit Trails For Dummies

• By Mashiane
• Aug 16, 2018

Ola

What is an audit trail? As per Wikipedia...

An audit trail (also called audit log) is a security-relevant chronological record, set of records, and/or destination and...

 

Attachments

• DBTriggers.bas

  9 KB · Views: 539

Last edited: Aug 16, 2018

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Hint about ("remote") DB queries

• By LucaMs
• Aug 12, 2018

After (unfortunately) having write many functions (in a code module in my b4j server project) which access a MySql, I remembered a fundamental rule: use Try-Catch when accessing external...

 

Last edited: Aug 12, 2018

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[ABMaterial] Using MS Excel as your reporting Engine for Database Records

• By Mashiane
• Feb 13, 2017

Hi there...

This is a continuation of my previous posts about dynamic charts and dynamic sidebaritems. My next challenge was to use the already existing MS Excel templates for reporting, inside...

 

Last edited: Feb 13, 2017

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[IoT] MQTT Protocol

• By Erel
• Oct 19, 2015

What is MQTT?

"MQTT is a Client Server publish/subscribe messaging transport protocol. It is light weight, open, simple, and designed so as to be easy to implement. These characteristics...

 

Attachments

• MQTTExample.zip

  2.7 KB · Views: 5,624

Last edited: Sep 26, 2023

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Easier SQL Inserts

• By keirS
• Jul 24, 2018

A standard SQL insert in B4J may look something like this:

B4X:

 Dim InsertCustomerSQL As StringBuilder
   Dim InsertValues As List
   Dim InsertID As Long
   Dim RS As ResultSet...

 

Attachments

• EZSQLInsert.zip

  66.1 KB · Views: 479

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[IoT][RPi] - Raspberry Pi Bluetooth Tutorial

• By Erel
• Nov 10, 2015

Using the new jBluetooth library it is possible to communicate with Raspberry Pi devices over Bluetooth.

Bluetooth can be very useful in places where there is no local network.

The...

 

Attachments

• bluecove_rpi_jars.zip

  449.8 KB · Views: 1,523
• RPi_Bluetooth_B4J.zip

  1.4 KB · Views: 1,364
• RPi_Bluetooth_B4A.zip

  9.7 KB · Views: 1,194

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