Tutorials & Examples

Adafruit IO is a cloud service built for IoT solutions. It provides two interfaces: MQTT and REST API. It is very simple to use it with B4X as demonstrated in this example.

It is more than...

 

B4XDialog from XUI Views library can show simple dialogs, template based dialogs and custom dialogs.

The example...

 

Depends on B4XTable v1.01+

It is very simple to add your own navigation features.

Code:

Sub btnNext_Click...

 

Check Trial Period using Dropbox (first version, improved version in Post #2)

Hello,

I have tried to find a solution to solve the control of the trial period of an app using the...

 

Good afternoon, I contribute to the community with a small example of the class B4XDrawer with material icons and fontawesome icons.

Thanks to the whole...

 

Hi,

in this tutorial i will show you how to add an in app product to your android app.

There is an official tutorial by @Erel so you should also check that out...

 

Sources used:
Main sources:
https://medium.com/@ssaurel/how-to-...r-a-crash-or-a-force-close-error-1a361677c0ce...

 

Here is a method using FTP to create a trial period for your app. Since there is no local file with trial information, the user cannot defeat it by manipulating stored data. Also, FTP calls are...

 

Using Kotlin libraries is similar to using Java libraries. The only difference is that we need to add references to two...

 

Hi everyone,

After a week I have finally figured it out how to add a custom font for the whole application without any library or extra code.

Here is the solution:

1. Create a folder...

 

Hello, excited to share my humble code, which can be used as a two-factor authentication or a secondary login. For this take as an example the use of the bank coordinates card, which allows you...

 

Hallo,

from time to time someone is asking on how to create a pdf with b4a.
I dont know how to do that ONLY with b4a.

Today i spend a few hours to write a b4a-example and a php-script which...

 

* This ads are still not available to all developers.

The code of the example are based in this code from @Erel (Thanks!)...

 

AdMob supports ads mediation. This means that the ad can come from different ad networks and not just from Google AdMob network.

It can improve the fill rate and the revenue earned.

...

 

The creation of layouts is very easy with the B4A Designer.

With more complex forms, however, it can happen that the result looks a bit weird. Usually the heights or distances between the...

 

Android 4.2 includes a new powerful screen saver feature named Daydream.

A "dream" starts when the device is docked or charged and the screen timeouts. By default dreams are non-interactive...

 

Thanks to the excellent work of Klaus and Rotating Needle exemple, I needed a gas gauge

#Region  Project Attributes
    #ApplicationLabel: fuel gauge...

 

This example shows how to modify the table data. When the user clicks on a cell we show an input dialog and let the user...

 

While analyzing a Crashlytics crash report of a small app of mine I was surprised to see the following error:

Fatal Exception: java.lang.NumberFormatException
For input string...

 

In this example the table is used to show the camera roll photos.

Main steps:
1. Get permission to access the external...