B4J Tutorials

Attached you find an example of accessing a jRDC2 server. This is a conversion of the DBUtils example program (here...

 

Ola

Some thoughts are running in my head about implementing this for my color coded events management. So we have 21 colors. So me thinks a 7 row, 3 columns grid will do.

Sub...

 

So I was intrigued that I couldn't have a valid ssl cert for localhost so what I did might be useful to someone:

--- THIS IS DONE IN LINUX ---

1. Generate a RSA-2048 key and save it to a file...

 

The jPOI library allows you to read and write Excel workbooks: https://www.b4x.com/android/forum/t...t-excel-xls-and-xlsx-workbooks.57392/#content

The library...

 

Simple solution that uses an embedded MQTT broker with a MQTT client to send the camera output to any connected client. The camera used is the standard RPi camera module.

The program starts...

 

The normal postfile method just posts the file data. So you are not able to get the filename and other needed parameters. There are other examples, but sometimes you need a small solution. The...

 

I used the example that Erel published to create my application and connect it to a server database microsft sql server 2008, in principle I used the odbc open source of JTDS but I had...

 

Data from classes, types or any other object can be sent as a message to LogServer by writing a Sub to format the data in an easily readable manner.

The example app (B4j) shows this, and...

 

LogServer can only accept one connection at a time, therefore we should not initialize the LogServerClient multiple times to access it from different classes / modules.

Instead, declare it...

 

Hello,

If youre creating apps that work with moving nodes (in my case D'n'D), you may als have seen that moving nodes sometimes results in ugly trails on the Parent Pane.

Heres how to fix that...

 

Ola

Well, it will take a while for me to 'canvas' everything. Found a nice snippet in CodePen, lovely thing I must say. So I'm thinking, an ABM screensaver!!!

After some exploring (still doing...

 

Well

My intention was to have an Android Play Store for my ABM app. I needed my app to remember the login details, meaning that it needs to access localstorage.

Thing is, local storage is not...

 

See for a B4JS introduction: https://www.b4x.com/android/forum/threads/abmaterial-b4js-0-9.90249/

Note: for this tutorial, I may use some typical ABM things. You can ignore them as they are...

 

Ola

For a while I've been thinking about this. I wanted to use a custom component that I could run inside ABM to try and explain my follow up post on Harri's thread. The discussion has been about...

 

This example demonstrates how the B4X tools can be used to create a solution with multiple types of components and communication channels.

See the following video (make sure to watch it in HD...

 

Hi there

Is it possible to set the default date to be blank / no date for the ABMDatePicker control?

Thanks

 

I've written a tutorial about database modelling and how long queries in a good designed db environment should take. This is a example about using huge databases. What it does:

- creates two...

 

Ola

This is a continuation of the MashSkeletor concept. If you are a beginner in b4j custom views you might find this very helpful. In this part, the custom view structure was created and now its...

 

Hi there

UPDATE: A WebApp using BANAno has been created for this, see here...

 

Hey,

this is an example/tutorial of a Server that manages Firebase Subscribtions, Unsubscribtions and SendMessages2Topics with the Power of B4J Server!

The advantage is, requests are processed...