Tutorials & Examples

FitBit OAuth and HTTP SDK

You need to define an App in the FitBit Console at https://dev.fitbit.com/apps

Make sure to set your "OAuth 2.0 Application Type" to...

 

This is very clever software and when I first saw it, it blew my mind. It took a couple of seconds for me to comprehend what I was seeing.

The program is called ScrCpy and when run on your...

 

When you like to download files with httputils2 you need to know the files by name. There are some examples using ftp or a generated xml file with the contents first. To me this could be easier...

 

simply add this to a url:

/favicon.ico

Examples:

https://paypal.com/favicon.ico

https://netflix.com/favicon.ico

https://b4x.com/favicon.ico

 

After all the work I went through to make the simple pie graph, I noticed I had 90% of the code to make a "Fan Menu" type library so I went ahead and created the following prototype...

 

Hello All
Here we have a simple example of how you use corwin42s WatchFace Library. The WatchFace library is extremely simple to use, corwin42 has done a great job wrapping it, thank...

 

A common task we face while enhancing our apps is the need to update the structure of a running DB.
This is relatively easy if you know for sure that your users will all go from version 1 to...

 

A new more powerful framework is now available: jRDC2.

This tutorial explains the basic concepts required for creating a connection between Android device and a remote server. In this...

 

Tested with both B4A and B4J - see https://www.b4x.com/android/forum/t...smart-power-plugs-b4x-home-automation.125768/

 

The SMB library allows you to access Microsoft Windows Network file system.
You can read more information about this protocol here: Server Message Block - Wikipedia, the free encyclopedia...

 

Roughly speaking, Mastodon is an open source, distributed, social network a bit similar to Twitter:

Mastodon - Decentralized social media

Learn more about Mastodon, the radically different, free and open-source decentralized social media platform.

joinmastodon.org

Pleroma is a lightweight implementation of Mastodon with some...

 

Two apps show methods and their usage to recognize chess figures and their position based on a camera shot, one using only OpenCV image processing and utils (Chessboard OCV) and the second one...

 

 

A simple, B4A + B4i, example based on:
B4A: https://www.b4x.com/android/forum/t...-messages-firebase-cloud-messaging-fcm.67716/
B4i...

 

Here is a simple subnet scanner. It scans the current class C subnet for a particular port number and tries to open a connection.

It logs all the IPs that are found to have that port open in a...

 

Part 1

1- Intent is exactly a Specific Message between Android Apps.
Building this message is simple in B4A:

dim intent1 as intent

2- Any message (ie: intent) has a specific purpose...

 

It incorporates this Github project via inline java code. The project reports a whole lot of information about your device and write the results to the B4A log:

** Activity (main)...

 

This is a simple like animation.
It looks smoother and better in real.

Private Sub LikeAnimation(xlbl As B4XView,duration As Int)
    Dim txt_size As Float = xlbl.TextSize
    If...

 

The Excel library is a new library that wraps the open source jexcel project and allows you to read or write Excel workbooks. This library supports XLS files. The new xml based format (xslx) is...

 

Seeing the new Template feature, I thought I'd use it for the new libraries I create.
I created a Template that opens three folders (B4J, B4A, B4I) with the library.

In addition to...