Tutorials & Examples

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...

 

Introduction

The big day has dawned at last. We are now going to connect our Arduino to our Android device and get the two to talk to each other and to their own IDE on the PC...

 

This is an example of how to build an app and sent intents to your pebble.

 

Hi Everyone,

Until the mapview becomes available, I have managed to "squeeze" the googlemaps V3 JS API into a webview for an app I am working on :sign0060:

The benefit of the JS map over a...

 

I have many layouts split by a scroll view, and on any layout i have a lot functions. Is possible divide any of this in more activity starts on panel on scroll view? Thanks

 

Sharing the goodness. An attempt to have JQuery Mobile controls inside a webview running inside B4A.

Check this post...

 

Opening the browser is very simple.
First you need to add a reference to the Phone library.
Then:

    Dim p As PhoneIntents
    StartActivity(p.OpenBrowser("http://www.b4x.com"))

...

 

The attached project shows how to use the device's camera to snap a picture and upload it to your Facebook wall.

This sample is based on the code written by the one and only vb1992 found...