B4J Tutorials

[IoT]Control a LCD display with you RaspBerry

• By KMatle
• Nov 12, 2015

For this tutorial you will need the Pi4J library. Get it here (under Erel's video): https://www.b4x.com/android/forum/threads/iot-jpi4j-raspberry-pi-gpio-controller.37493/#content

I did...

 

Last edited: Nov 12, 2015

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Raspberry Pi 2 - Server Performance

• By Erel
• Sep 1, 2015

I ran some tests to check whether the Raspberry Pi 2 can be suitable for server solutions.

The tests were similar to the tests previously done on a PC...

 

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[Server] Send and receive objects

• By Erel
• Jan 28, 2014

This is an old example. Better use B4XSerializator to serialize objects.

One of the nice things about using B4J server as the backend of B4A applications is that you can send and receive...

 

Last edited: Mar 30, 2018

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Companion thread to B4J Training Video 5 - Bridge Scripts

• By Mark Turney
• Nov 3, 2015

As promised in this the B4J Training Video about the Bridge, I am attaching the scripts for running the Bridge from Mac or Raspberry Pi (Linux):

Mac:
1) Create a file called bridge.sh
2) Insert...

 

Last edited: Nov 3, 2015

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(B4X) Creating LAMP server with b4x on Amazon EC2

• By Shay
• Feb 11, 2015

LAMP: Linux Apache MySQL PHP

In this tutorial I will explain how to bring complete working server, on Amazon EC2 (you get 1 year free)

I am using this server for sending notification for iphone...

 

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[WebApp][IoT] PiFace (Raspberry Pi) Server Example

• By Erel
• Apr 17, 2014

This example demonstrates how a Raspberry Pi board can be controlled from the browser.

It tracks the switches state and...

 

Attachments

• PiFaceServer.zip

  6 KB · Views: 1,568

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where to code put code when using multiple forms

• By raphipps2002
• Nov 2, 2015

I've started using B4J after using B4A for a few months. What is the best structure of the code when using multiple forms. Unlike B4A where each activity has its own code, or indeed with vb.net...

 

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[IoT] Headless Raspberry Pi

• By Mark Turney
• Oct 31, 2015

During my building of a security camera for my wife's mall store and prep for projects with my personal RPi and PiFace, I quickly discovered that having a headless RPi would be nice.

What is a...

 

Last edited: Oct 31, 2015

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TreeView Tutorial

• By Erel
• Dec 11, 2013

B4J v1.05 adds support for the TreeView node.

TreeView as it name suggests visualizes a tree structure.

Each item in the TreeView is a TreeItem (or CheckBoxTreeItem). Each item has a list of...

 

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GameView - Simple Sprites Engine

• By Erel
• Sep 3, 2015

This is a port of B4A GameView library and modules.

If you are not familiar with it then start with these tutorials:
https://www.b4x.com/android/forum/threads/20038/#content...

 

Attachments

• jGameViewHelper.zip

  5.6 KB · Views: 1,537
• Asteroids.zip

  244.3 KB · Views: 1,523

Last edited: Sep 3, 2015

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Modal dialogs

• By Erel
• Nov 19, 2013

B4J allows you to show modal dialogs or modal forms.
The difference between a modal form to non-modal form is that with a modal form the calling code will only continue after the form is closed...

 

Attachments

• ModalExample.zip

  2 KB · Views: 2,309

Last edited: Dec 3, 2013

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B4J tutorial for Basic4android developers

• By Erel
• Nov 19, 2013

B4J development tool is similar to Basic4android. The language and IDE are mostly identical.

The APIs (methods, keywords and libraries) are identical in some cases and different in other cases...

 

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FlickrViewer

• By Erel
• Nov 18, 2013

This example downloads an html page, parses it and finds the image links. It then uses a class named ImageDownloader to...

 

Attachments

• FlickrViewer.zip

  3.2 KB · Views: 1,252

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AsyncStreamsObject - Send and receive objects over the network

• By Erel
• Nov 18, 2013

For new projects it is recommended to use B4XSerializator instead of this solution.

AsyncStreamsObject allows you...

 

Attachments

• AsyncStreamsObject.zip

  4.1 KB · Views: 3,649

Last edited: Aug 10, 2016

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Synchronize ListView Scrolling

• By stevel05
• Oct 29, 2014

I needed to keep two ListViews scrolling in sync, so searching the internet I found this: http://stackoverflow.com/questions/16937470/listen-to-scrollbar-change-in-listview

which I have...

 

Attachments

• LVSyncClass.zip

  2.8 KB · Views: 738
• LVSync-2.zip

  3.1 KB · Views: 695

Last edited: Oct 30, 2014

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Customized ListView

• By Erel
• Nov 25, 2013

Use xCustomListView instead.

 

Last edited: Apr 27, 2020

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[Server] Regex Tool

• By Erel
• Mar 24, 2014

Online example: http://basic4ppc.com:51042/regex/index.html

This tool allows you to test regular expressions...

 

Attachments

• regex.zip

  2.4 KB · Views: 1,224

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[WebApp] Quiz Example

• By Erel
• Apr 22, 2014

Online link: http://basic4ppc.com:51042/quiz/index.html

This is an example of an online quiz. When the...

 

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B4J HelloWorld(s) Examples

• By rwblinn
• May 1, 2015

As a helper to get started with B4J, some classical HelloWorld type of apps.
B4J offers many solutions in the way an app(lication) can be developed.

Status: 20150502

Below examples...

 

Attachments

• B4JHowToHelloWorlds.zip

  23.4 KB · Views: 1,740

Last edited: May 2, 2015

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In-line Java in multiple modules

• By Daestrum
• May 1, 2015

I have been using the in-line java for ages and only just discovered that you do not have to put all the code in one module, as I was previously doing.
It can be placed in the module to which it...

 

Attachments

• java code modules test.zip

  1.6 KB · Views: 683

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