Tutorials & Examples

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...

 

In case anyone is interested I attach a modified version of Erels' ThreePagesExample for B4A only. It demonstrates the following enhancements.

1) B4XMainPage requests a Runtime permission.

2)...

 

Today for the first time, I started messing with B4XPages and Firebase. Even though I had already watched B4XPages, I hadn't fumbled to understand better.
The hardest thing was Firebase...

 

https://www.zdnet.com/article/googl...001503c2c&utm_campaign=trueAnthem:+Trendin...

 

Sharing code between the platforms is quite simple with the reference modules feature: https://www.b4x.com/android/forum/threads/b4x-modules-files-groups-and-folders.86587/#content
Once you...

 

I have created an app to read and write to BLE devices. This is an extension of BLE_Examples.

In this example the scan lists all devices found. You connect to a device by selecting it in the...

 

Now I have started a very big project and I came to the problem how to set and get more parameters.
Yesterday I spent the whole day looking for a solution on the forum how to set and get more than...

 

addJavascriptInterface [WebViewExtras] CallSub [B4XPages] Example

I created a Example (after search and not found)

send data: from WebView to B4X / from B4X to WebView ,
using addJavascriptInterface and...

 

Have combined Expandable List Based on CustomListView and Intent Based Camera to create attached project. The plan is to use this for auditing purposes. Once I am done with...

 

First, someone post nice simple demo for bluetooth printing(BTPrint.zip) but unfortunately I can't find this again for giving credits, but who ever is , thanks.
Now, here is also demo based on...

 

@Pendrush recently introduced its wrap of the In-App Review Library.
After a rework, the solution now works great...

 

This is an UltimateListView example that I made with a help of @Informatix and your library:
https://www.b4x.com/android/forum/threads/lib-chargeable-ultimatelistview.22736/

It...