Tutorials & Examples

Android development starts here. Please do not post questions in this sub-forum.

[B4X] B4X Forum Repository

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[B4X] DateUtils - Simplifies Date and Time Calculations

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:

B4X:
'Calculates the period...
 
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Libraries that do not support 16kb alignment?

Many have gotten the information about their Apps not aligned with the 16KB. Here is how to check which specific libraries are causing the issue

Note: You have to check for each app individually...
 

Google Authorization – Fix for ClearTokenRequest Class Not Found Error

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[B4A] [B4XPages] OSM Maps / FusedLocationProviderClient GMS

May 4, 2024 - Start of tutorial post...

Based on:

The original project was based on the GPS object /...
 
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Android 16KB Page Size Compatibility Checker

This script checks for all the necessary markers to be sure your APK/AAB/SO files are 16KB page size compatible.
It has been simplified to easy usage.


What Does This Check?​

Starting with...
 
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Android Live Wallpaper tutorial

The user can set live wallpapers by long pressing on the home screen and choosing Wallpapers - Live Wallpapers.
Creating a live wallpaper is not too difficult.
A service is responsible for...
 

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"Stick Header" CLV Demo

A demonstration of using a "Stick Header" (Floating Title)...

With Erel's help HERE, I was able to create my version of a "floating title", as Erel has coined it.

If you use ChatGPT...
 

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Less back and forth with your smartphone and PC

As mobile developers, we all have the frustrating experience of taking our eyes off our smartphone and staring at the PC screen, and vice versa. Microsoft "Phone Link" is a useful Windows app that...
 

Debugging your app on real phone without USB cable or B4A bridge

Using a USB Cable for debugging apps is faster and easier than using B4A bridge. But as you know, being always connected to the USB port will decrease the battery life. With this instruction, you...
 

[XUI] CustomListView with floating titles

clv_floatingtitle.gif


Title items are added to the list.
A Panel is set above the list. The panel shows the current title when the top visible item...
 

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[B4X] RandomUser API - SMM + lazy loading list + DDD

1760519045466.png


Cross platform example of showing a list of users, retrieved from https://randomuser.me/

The API returns a list with the data of 150 random users. The list is parsed and added...
 

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User Login Demo - how-to features

Hi y'all,
I've been working on a demonstration app that would show a bunch of how-to's.

Specifically, how to use an "admin" user and a regular user (non-admin) for login data admin (CRUD).
All...
 

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Share SQLite database between 2 devices

This is just a proof of concept to show that Device A behave like a server hosting a database and Device B connects to it accessing the "shared" database. It is a response to this question...
 

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OSMDroid - MapView for B4A tutorial

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Lottie Example with 16kb support

This example is based on the Lotti Library by DonManfred found here. (It still works)

I tried it on 16kb android 15 emulator and...
 

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[B4X]How to Implement Lottie in B4XPages (AXrLottie B4A, iLotttie B4i and B4J)

This is B4XPages example for LOTTIE implementation on Android (B4A), iOS (B4I) and Desktop (B4J)

B4A Implementation

Uses AXrLottie. Download the library and dependencies...
 

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[B4X] Class templates

*** This is a trick, a discovery by @aeric, really very useful ***

[B4A-B4J-B4i]


[This is a long post but the process is much simpler than it...
 

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[B4X] #CustomBuildAction

The #CustomBuildAction attribute allows running external programs during the compilation process.
The syntax is:
B4X:
#CustomBuildAction <compilation step>, command to run, zero or more arguments...
 
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Expandable list based on CustomListView

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