Tutorials & Examples

Johan Schoeman · Sep 28, 2014

This was done just for fun. It is a 24 hour analogue clock/watch. Have used the GPS Example from @klaus as base for this clock.
JHS CLOCK V1 => a 24 hour clock running clockwise...

Straker · Sep 24, 2014

I've made a very simple project which periodically connects to a VB6 Server.
The code is well commented with notes for programmers coming from VB6.

In this code I use once ExitApplication. It's...

jonydoboi · Sep 23, 2014

Random Numbers.
Timer.
ExitApplication.

jonydoboi · Sep 23, 2014

Service Module using CallSub.

A very simple example. I thought you had to use CallSub from an Activity, but had it backwards.

barx · Jul 5, 2014

NOTE: there may be a way to achieve this already in B4A that I'm not aware of.

This little tutorial will show you how to create an app with translucent status bar And/Or navigation keys...

KMatle · Sep 11, 2014

If you build an app which uses a larger form you might have realized this by pairs of labels and edittexts. The label ist used for the description (f.e. "Name") and the edittext will contain the...

merlin2049er · Sep 8, 2014

Here's a quick little example of how to shorten your urls using tinyurl.com.

Thanks to TDS, who provided the solution.

NeoTechni · Sep 7, 2014

ie: If you want to make a music control widget

First you need to add a broadcast listener to the manifest

AddReceiverText(thenameofyourservice,
<intent-filter>
<action...

Johan Schoeman · Sep 3, 2014

This project demonstrates grayscaling of a multi colored image and then the binarization (i.e black or white pixels only) of the grayscaled image. The binarization is based on Otsu Thresholding as...

Johan Schoeman · Sep 2, 2014

This project demonstrates dithering of 8 bit grayscale images as explained at www.fiji.sc/Dithering. Methods included are the following:

Floyd-Steinberg
Atkinson
Jarvis-Judice-Ninke
Stucki...

Johan Schoeman · Aug 31, 2014

This project demonstrates the conversion of RGB images to various options of Grayscale images. It is based on the tutorial at http://www.tannerhelland.com/3643/

Click on any one of the...

Johan Schoeman · Aug 30, 2014

This project demonstrates contrast enhancement of low contrast Grayscale images based on Histogram Equalization as explained at...

jsanchezc · Feb 8, 2014

Hello,
This app is a sample to get GPS info, save into file, load list of tracks, show in map,
assign a photo and send map and log info in CSV format by email.
Also there is some code about saving...

IanMc · Jul 7, 2014

We'll do this using the Canvas object.

I'm just learning but pretending that I can teach it

Download the provided CanvasTest.zip and open it.

What I've done here is to create a panel and...

Erel · Dec 19, 2011

I have a new toy

The attached AbstractLayout.txt file includes the layouts of the Samsung Galaxy Nexus, the first Android 4.0 device.
You should copy it to Basic4android installation folder...

anallie0 · May 19, 2014

I wanted to provide this simple code for beginners like me.
The code is derived from the one written by the my teacher Klaus here.

This ListView is made with a ScrollView inside of which is...

Erel · Dec 22, 2010

The following code draws a "selection" window when you move the finger:

B4X:

Sub Globals
    Dim Canvas1 As Canvas
    Dim Rect1 As Rect
    Dim sx, sy As Int
End Sub

Sub Activity_Create(FirstTime...

EduardoElias · Feb 5, 2013

There are situations where we change the panel colors, like when the user select its own color, and we dont know if the text of the labels will be seen. Commonly we define black or white for text...

Hubert Brandel · Jul 31, 2014

Hi,

normaly B4A use UTF8 encoding, but can create files in ANSI too, but be carefull !
Windows an a Western PC use ANSI codepage 1252, this is in B4A "WINDOWS-1252".
Mostly the encoding...

stevel05 · May 18, 2014

The attached project shows the use of the USB library to communicate with Midi Devices over USB. I realize that this may open a can of worms, as it seems nothing about Midi communication is...

Tutorials & Examples

Show only:

Clock - 24hr analogue clock

Attachments

Service and Sockets for beginners

Attachments

Random Numbers, Timer, ExitApplication

Attachments

Service Module Example

Attachments

Translucent Status bar / Navigation keys

Save all Edittexts & corresponding labels on a view to a file (JSON) and reload them

Tinyurl shortening

Attachments

How to get track change data

Otsu Thresholding - binarization of images

Attachments

Image - Dithering 8 bit Grayscale images

Attachments

Image - 17 different ways of Converting RGB Images to Grayscale

Attachments

Image - Enhancing Image Contrast by means of Histogram Equalization and Histogram Stretching

Attachments

App to log GPS information, display map and send by eMail

Attachments

Lets play with vertical lables!

Attachments

Samsung Galaxy Nexus layout

Attachments

Graphics ListView with 2 images, two labels and populated from a text file.

Attachments

Drawing a selection window

Getting the Contrast Color (for a label, etc)

PC-ANSI encoding on B4A ...

Midi USB device manager

Attachments

Tutorials & Examples

Attachments

Attachments

Attachments

Attachments

Attachments

Attachments

Attachments

Attachments

Attachments

Attachments

Attachments

Attachments

Attachments

Attachments

Privacy & Transparency

Privacy & Transparency