Tutorials & Examples

Not long ago Don provided example Provider Requester Activity based communication via Intents.

Although that Activity version had some hints in it for Service based version, it took several...

 

In debugging my current app I needed to reset back to basics to debug some code. I ended up creating this simple app which contains all the basics of a long-running background service (taken from...

 

I save the SQLite DB used by my apps in the directory corresponding to File.DirInternal, which is the app's exclusive space.

This, however, prevents you from accessing the DB from outside...

 

the huawei map kit will hopefully be integrated into the B4A soon..

i have opened a topic here, and huawei teams will provide support...

 

B4XCollections v1.13 includes a new sorting feature named B4XComparatorSort.
This feature allows sorting using a custom comparator class.
The comparator class is a class that you create and it...

 

Last weekend I migrated my XAMPP test environment (Apache/PHP/MySql). It came with PHP 7.x. Yesterday I wanted to test one of my Apps using AES and Mcrypt for it in PHP but it didn't work no more...

 

You download a project from the forum and when you run it, you get an error message similar to:

B4A Version: 10.2
Java Version: 8
Parsing code.    (0.11s)
Building folders structure...

 

Sample 1

A wrap for this Github project. Posting:
1. B4A sample project
2. Java Code - check the code inside the wrapper vs the Java sample code.
3. B4A lib files

A nice...

 

Hello team,

If you recieved an email about submiting Data Safety form at Google Play Console and your apps using Admob, you can watch this video to guide you.

More infos you can find...

 

Sometimes it is really annoying to have keys we use so often to be lying in most inaccessible parts of keyboard.
And to make the matter worse they might also involve combination of shift etc...

 

This is for people like me - B4A libraries for Dummies 101 (via SLC). I will attempt to explain it the best I can (there is nothing in this library that one can't do via B4A code. This is purely a...

 

I've made this (new thread) post because I just went through all of this and scoured these forums and the Internet and could not find any complete step-by-step instructions that worked, and the...

 

Attached sample project is a wrap for this Github Project.

Attached are the following:

1. NeheLesson09.zip - it contains the library files (Jar and XML). Copy the Jar and XML to your...

 

Newer example: [B4X] [B4XPages] Intent based camera

This example uses an intent to take a picture with the default camera app.

It is based on this tutorial...

 

Yesterday I have found out something searching in Google and checking it, it seems that it worked for me (until ipv4 is deprecated). So this is by 50% a tutorial and by 50% a request for other...

 

This is a short Example of what is possible with this 2 views.

I spend a lot of time in creating views, like this and to create a high quality view cost a lot of time. If you want to...

 

This is only an update to the original example from Erel.
I'm starting to create cross-platform apps using B4XPages.
It is mainly to B4A and B4J, because I don't use B4i, and I tried to put...

 

It is mostly based on this posting. It is a 3D spinning cube. The code is very simple (the lib does all the hard lifting). You can change the images of the 6 x faces of the cube by...

 

Immersive mode means full screen mode where the navigation bar is also hidden.

The user can bring back the bars by swiping near the edges.

The required steps are:

1. Call setSystemUiVisibility...

 

How to Draw S-Curved Arrows Between Boxes / Rectangles

When I was building the spatial “tool for thought”, Jade, one frequently requested feature was drawing arrows between blocks, so we could make mind maps, flowcharts, etc. Here’s how I made it.

dragonman225.js.org

(Usually I think I tend to post things like this in Chit Chat, but that's not searchable from the forum search engine so I suppose it's better...