Tutorials & Examples

The "index pattern" is a pattern that you can see in many examples and libraries where resumable subs are used. It is a simple solution to avoid race conditions and unexpected states.

The...

 

Better to use: https://www.b4x.com/android/forum/threads/simple-progress-http-download.127214/#post-796463

The attached project includes a slightly modified version of HttpUtils2 and...

 

Starting from Basic4android v2.50 you can compile your project, or part of it to a regular library.

Why should I compile a library?

• Break large projects into several smaller (more...

 

I decided to become Google's darling. After a very old B4A app, that went perfect for many many years (API 8, targetSDK 14), was threatened to be thrown out of the app store, I decided to waste my...

 

Hi all.
Here is a simple pou game example (only one room).


This example use this another example, but now with images...

 

[A simple suggestion, not addressed to "experts"]

I am almost certain that some members, having to identify which view triggered an event, use the tags.

For example:

You have a kind...

 

The attached B4J example demonstrates how to implement lazy loading with editable items.

There are several interesting points...

 

With this example I show how a decimal number can be translated to Greek words.

For example: Log(DeployCurrencyToText(1234.04)) give the result χίλια διακόσια τριάντα τέσσερα ευρώ και τέσσερα...

 

We start with a few DIMs for needed Variables

sub Globals
    Dim ffiles,ffolders As List
    Dim root As String
End Sub

and a main sub from this tutorial

Sub ReadDir(folder As String...

 

Hello,

This is the first time I am preparing a tutorial for this great community so please excuse me for any mistakes or weak explanations. Methods of some of the implementation may not be %100...

 

This is a simple project that makes use of the device's vibrator. You can do the following:
1. Switch the vibrator ON for a specified duration of time (in milliseconds)
2. Switch the vibrator...

 

Question: How can I build a layout with X controls spread horizontally or vertically?

Answer: You can use the designer script for this. As the designer script engine (currently) doesn't support...

 

Several developers were interested in adding support for signature capturing in their Android application.
The attached code module makes it easy to capture the signature and save it to a file...

 

What is Version Control?

Spoiler

Version control software keeps track of every modification to the code in a special kind of database. If a mistake is made, developers can turn back...

 

Part 1: The key

This is just a write up of my findings regarding the exchange of encrypted data between B4A/B4J and LockBox3 (Delphi). This write up focuses just on LockBox3's implementation of...

 

Google Maps uses the GPS as its location provider. It will not show the current location if GPS is disabled.
It is possible to switch to a custom location provider.

For example, here is me...

 

Hi all.
I found this example in some old folders on my pc and decided to share here.
it is a simple layout example, the app is whatsapp

This example use a clv and tabstrip

...

 

Hi all.
this example play Happy birthday to you music with beep. (Audio librarie)

Sub Globals
    Private lNotas As List
    Private lbNotas As Label
    Private tocando As Boolean
End Sub...

 

Hi all.
I found this example in some old folders on my pc and decided to share here.
it is a simple example of how notcreate a ventilator in B4A.

On this example have, image...

 

Hi all.
I made a simple collision example, where our player (black square) can collide with any other view that has the tag = 1

This example is in Portuguese obviously because I am Brazilian, I...