B4J Tutorials

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...

 

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...

 

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

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

 

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...

 

Hi,

As I wanted to post messages to Twitter within my B4J app I couldn't find any Twitter library's (or code) to use with B4J, so I created this small library to allow me to tweet messages to...

 

Ola

Well, this is not related to ABM per se, but due to the fact that I wanted to package an ABM app for distribution for users to use in in their computers without the need of an internet...

 

New video tutorial:


Resumable subs is a new feature added in B4J v5.50 / B4i v4.00 / B4A v7.00. It dramatically simplifies the handling of asynchronous tasks.
(This feature is a...

 

Edit: It seems like there is an issue with Http/2 enabled with Conscrypt (https://github.com/eclipse/jetty.project/issues/2342). For now it is recommended to use Java 9+ without...

 

The official charts library of ABMaterial is Chartist, but because of its many features it is also a rather slow rendering js/css library and not always that easy to implement. @Mashiane...

 

PrintHtml is a Windows utility that prints html files. You can see more information about it here: http://www.b4x.com/android/forum/threads/print-with-printhtml-tool.35492/

In this example...

 

ABMFileManager is a new component in the upcoming ABM 4.25 to manage files on your server (where the .jar file runs), but is not limited to the www folder. This feature makes it very useful on...

 

Ola

Been looking for this like forever...

Usage:

MashSpeak(page,"I have been developing A.B.M. web apps for a while now. It's an enjoyable experience.",0.7)

Sub MashSpeak(pg As...

 

Ola...

I have created an RC(2,1) and page.Cell(2,1).SetFixedHeightFromBottom(20, False)

The height of my ABMGoogleMap is 500 (int) however I want it to fit the whole RC, taking the whole page...

 

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...

 

The latest IDE update adds support for grouping files and modules.

Groups

You can add groups with a right click...