Tutorials & Examples

Introduction

This final tutorial has some explanatory comments about the two programs running on the Arduino and the Android device. Those programs should be largely self-explanatory as...

 

I am trying to use the examples relating to layout or multiple panels . But all the files give me error "The value cannot be null" "parameter name: input Error File twolayouts1.bal: "I have read...

 

Attached project demonstrates two ways to interface with a JAR file:

1. Using the JavaObject run method "directly"
2. Making use of inline Java code

For method 1 you need to make use of...

 

It would be very handy if we could fold up our code on If Then statements.

Thanks...

 

Hi all...

I'm posting this in the hopes that it'll help anyone programming with B4A to understand the life cycle of an activity. I struggled with this a bit, and the graphical representation...

 

Hi..
I have created one activity that contains AudioRecorder using audiorecorder library.
i want to start and stop recording from background using service.
timer is not working to stop...

 

Please use timo's version and not the one attached below!

 

Examples of image processing

Click on any one of the displayed images to change to an alternate image.

Made use of Jpeg library by @agraham

See...

 

The attached project (with inline Java code) will list all the sensors on your device in the project's log.

 

The attached project will generate and solve Sudoku puzzles (9x9). The code to solve the puzzles with was adapted from here (converted to B4A). The code to generate Sudoku puzzles with comes...

 

As an answer to the thread Forms alike, I thought that the examples below would be of general interest.

Attached there are 4 examples with two same layouts but with different managements...

 

Android supports a special format of PNG images that can be resized by replicating specific parts of the image.
This images also include padding information.
These images are named nine-patch...

 

After hours of research i was able to create a download link for my app on a windows server. here are the instructions for doing so.

under iis create a mime type by right clicking on your...

 

This example loads a midi file and records an extra track from either the on board keyboard, or an external USB midi device.

Please be careful when saving files as the recorded track will be...

 

This example allows creation of loops on multiple tracks as they are played. Just like a drum sequencer. It demonstrates creating a midi sequence and tracks, and adding events and messages...

 

This example allows playing a midi file to an external USB device which you can select. It also allows delaying the messages send to the usb device so you can hear them at the same time as the...

 

Based on Erels google services OAuth post I thought I'd try accessing the facebook Graph Api using a similar technique.

The hardest part as it turned out was creating the app on...

 

Hi all,

My contribute to the community a USB Serial service, you can add more activitys...

If you like this please press "like"

Thanks

camolas

 

Hi all,

My contribute to the community a TTS service for 2 Activitys, you can add more activitys...

If you like this please press "like"

Thanks

camolas

 

WebView tutorial

I wanted an easy way to provide in-app documentation such as help screens etc.

I was thinking of going with the CustomListView and then trying to colour some of the lines of...