Tutorials & Examples

Start with this tutorial if you are not familiar with custom views: [B4X] Custom Views with Enhanced Designer Support

With the help of XUI it is quite simple to create custom views classes...

 

This tutorial is about db modelling with a small example. Of course this is just an overwiew and there is much more. I assume you know how to create tables and Co.

Databases

A db is a...

 

With this code you can retrieve images shared to your app (e.g. if a user selects one or more images from the gallery and selects "Share..."). No permissions are required as the user selects the...

 

Saw a request for this so I thought I'd share. Below you will find a way of converting an integer to a DIP (Density Independent Pixel). This may be useful in situations where you have a variable...

 

This code is an example of creating an expandable listview using a scrollview.
The layout of each item in the list is created in code and is customizable on a per item basis.
The example is...

 

SQLite Viewer is an open source application that allows you to view the contents of SQLite databases right from your Android device...

 

Hi to all! I want to post a small example to verify the signature of an in-app purchase, in order to avoid the use of application like Freedom and Lucky Patcher.
An important note is that this...

 

Remember that that a call to Sleep or Wait For in a resumable sub causes the code flow to return to the parent.

Example:

Sub Button1_Click
Sum(1, 2)
Log("after sum")
End Sub

Sub Sum(a...

 

Edit: A better kiosk implementation is available: https://www.b4x.com/android/forum/threads/device-owner-tasklock-kiosk-apps-2017.81765/#post-518018

Kiosk mode applications are...

 

Hey guys!!

I took this HTML5 example and adapted it to B4A.

I hope the code is self-explanatory, if not, I'll be here to help.
Once again I'm using panels, but you can use whatever...

 

Hello,

I was facing a problem to use B4A bridge because I'm connected to a LAN without WIFI.
I found a solution to make my computer a WIFI spot and then use B4A bridge & B4A designer Wireless...

 

Ciao a tutti, ho creato un corso in italiano su piattaforma B4A per creare una app con un sito web, il corso è per principianti e guida l'utente dal download e l'impostazione di B4A, del JDK e...

 

After some years I have developed several apps to communicate with other apps, servers and platforms. My goal was to have ONE standard solution without additional propriatary solutions which work...

 

Private sign keys created with B4A v7.80 or less together with Java 8u151+ will fail with the above error message. Note that it does not affect existing keys.
It is related to a change in the...

 

Google has acquired a company named Firebase and is now offering many backend services under the Firebase umbrella. Most of them are free.

Integrating the services is relatively simple.

1. Use...

 

Hello.
Probably the majority of using GPS, wondered how to display the GPS Status in OsmAnd:

So,
wanting to display the GPS Status in the OsmAnd 2.9.3 application, publication date 2018-02-08
the...

 

check out for Basic4android ebook on Amazon on this link:

https://www.amazon.com/gp/aw/d/B077...16464991&sr=8-1&pi=AC_SX236_SY340_FMwebp_QL65

or how to...

 

if you're having problems with the resolution, or your age ( ) and you see the code too small ,try to use this tricky feature in VLC Player called "interactive zoom"

you can see all code...

 

I write for me, and share.
Add functionality to a log and logcolor functions.
Easy to implement.
Source Code for enhance or fix.
CSBuilder, TextWriter & TextReader implementation.

...

 

The result of compiling your application is an APK file. This is a package file that contains the compiled source code and the assets files.
The APK file must be signed before installation...