Tutorials & Examples

BitmapCreator (BC) continues to evolve. Version 4.5 update is a large update with several new drawing features.

Background

At its core BC holds an array of bytes that represent an image...

 

The HttpServer library is a new library, based on an open source project named Jetty. This library allows you to easily embed an Http server in your application.

Http server means that you...

 

B4XTable.SetData expects a List where each entry in the list is an array of objects with the data of a single row.

The data can come from any source you like...

 

Hi Friends,

As you know, I made an online sheet of Walt's B4XGoodies List and he helped me by providing download links of html and version text files...

 

Example was updated based on FileProvider class: https://www.b4x.com/android/forum/threads/class-fileprovider-share-files.97865/
See the above link if you are interested in sharing...

 

Using the NFC library you can read NFC tags formatted in NDEF form (NFC Data Exchange Format).
You can read more information about the internal process here: NFC Basics | Android Developers...

 

Android Support Library was implemented and maintained in the last 8 years by Google. It includes a wide range of features and it hides many of the differences between the various Android...

 

This is an extension to the MQTT chat room example: https://www.b4x.com/android/forum/threads/b4x-mqtt-chat-room.61568/#content
It is a chat room where one of the devices acts as a server...

 

Hello

I would like to share some observations with you all, is is based on https://www.b4x.com/android/forum/threads/background-location-tracking.99873/#post-628468

A problem that we all...

 

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...