B4J Tutorials

Here is an example on how to connect with a Jetty B4J server. The example shows how you could use the B4J server to login/logoff and run a basic REST API call.

The project zip file is in post #3...

 

UPDATE: since december 2022, chrome plugins like this have stopped working. Luckcely, the author of this plugin has created a standalone alternative you can install on your computer:

Simple...

 

BANano has a simple system to use events:

HandleEvents: does the same as On, BUT prevents the default behaviour
On: handles one or more events
Off: disables an event

To explain...

 

EDIT 1.04: Method syntaxes have changed!

With BANano, it is easy to make a Ajax call (e.g. to call a B4J REST API method).

There are two ways to do so:

1. Using events (the prefered way...

 

Maybe this is old news, but I was wondering if wait for could work with ABM events, and it seems they do!

Here for example (it is a page_ event, so I put it in the same class as where the page is...

 

Better to start with the integrated packager: https://www.b4x.com/android/forum/t...-way-to-distribute-standalone-ui-apps.117880/
B4JPackager11 is a...

 

BANanoSQL makes it possible to use 'normal' SQL queries on the IndexedDB database located in the browser.

There are three ways on how to work with BANanoSQL:

1. Event Driven
This is...

 

Running UI apps on Raspberry Pi with Java 11 is relatively simple.

1. Download Liberica JDK.
Download the lite version...

 

Hello all,
As the title say, this is a quick tutorial on how to print on A4 or Letter sized paper using the follow information provided by Steve Laming (better known as @stevel05)...

 

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...

 

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...

 

Hi all.
I found this example in some old folders on my pc and decided to share here.
it is a simple Bomberman example game logic.

this example load a map based on txt file

...

 

Since Azure supports Jetty, a B4J server app can also run on azure.

1. Search jetty in the marketplace and create a web app service...

 

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...

 

- Changed to B4x as the subs can be used in B4A, too
- "Send File" added (new Button to send a file to the other client)


This tutorial is based on Erel's Asyncstreams example...

 

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...

 

Before you start: You need some experience with php, Apache Servers, OkHttpUtils, Lists, Maps and JSON structures.

This is an updated example of how to

- communicate with a apache server via...

 

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...

 

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...

 

My Aim: Extract the gps information from all images in a directory and generate a html file to view in a browser showing all images in google maps at the coordinates they were taken.


As a...