Tutorials & Examples

The next versions of B4A (4.30) and B4J (2.80) will allow you to embed Java code inside your B4X code. B4i supports similar feature with Objective C.

The purpose of this feature is to make it...

 

EDIT: Use the PostString method as it can carry more data (5 MB is ok - it's a server parameter). Download2 uses the "get-method" which is limited. To retrieve the data in php use:

$json...

 

I had some issues with one of my apps receiving FCM messages correctly (when the phone was off and when it was swiped away/killed by the user). The other day I had a problem with my Google...

 

A short description using the MFColorMatrix class from my MFLib.

A color matrix is a 4x5 matrix for transforming the color and alpha components of a Bitmap.
The definition of...

 

First go to https://openweathermap.org/price and get APIKEY
Insert in the APIKEY in source code where are (INSERT_YOUR_APID_HERE).
Read the web for alternatives forecast options.


Create...

 

With the new Sip library you can make audio calls using Voip (Voice over IP) services.
Sip features were added in Android 2.3 (API level 9). Note that not all devices above Android 2.3 support Sip...

 

Note: You should use B4A 6.0 or above for this tutorial.

Android 5.0 (also called "Lollipop") introduced a new design for apps called "Material Design".

With this tutorial series I will...

 

I will thanks to warwound for FileObserver Library.
Also Thanks to all who share knowledge.

This App receive event when a new file (photo) is created al DCIM folder.
Also You can take photos...

 

This Tutorial will show you all needed Code to do Uploads to Dropbox.

Requirement for this tutorial: you need to have your App Dropbox-ready (see Tutorial I - Authentification).

Asuming...

 

The Sorter class uses quick sort algorithm to sort a list of objects.

There are exactly three assumptions about the list items:
1. All the items in the list are of the same type (or each item can...

 

Hi, I want to share an small course of SQL.
For me was so helpful.
Web:
https://www.sololearn.com/Course/SQL/

App:
https://play.google.com/store/apps/details?id=com.sololearn

This...

 

Step 1: On your mobile device, make sure you have USB Debugging activated.

Spoiler: How do I do it?

- Go to "Settings".
- Scroll down to the bottom and tap "About phone" or "About tablet",
- Scroll down to the...

 

This example uses the BLE2 library to continuously scan for BLE devices, looking for iBeacons.
It never connects to any device. It parses the advertising data and calculates...

 

Hi all i made a simple crop example, later many try and try its here
if this help someone

Im using the @warwound lib TouchImageView
many thx to @warwound

this sample have one...

 

The online example is currently disabled due to spam

Now that both B4A and B4J support WebSockets it is possible to implement a full push framework solution.
The solution is made of two...

 

Latest version available here: https://www.b4x.com/android/forum/threads/b4x-dbutils-2.81280/

The DBUtils code module is designed to help you integrate SQLite databases in your...

 

DateUtils is a code module with a set of useful date and time related methods.
It complements DateTime api, it doesn't replace it.

The methods included in DateUtils:

'Calculates the period...

 

Please see:

GPS tutorial
Toggle Library
Toggle on/off GPS in any Android version
Set phone clock from GPS

Advantages:
- System date and time are updated periodically.
-...

 

Type=StaticCode
Version=6.48
ModulesStructureVersion=1
B4A=true
@EndOfDesignText@
'******************************************************************************************************
'*...

 

It comes from here. The project displays as an example a colourful battery level indicator. Lib files are in the /files folder of the B4A project. The indicator will only update/redraw when...