Tutorials & Examples

[B4X] [Visual Designer] Spreading Controls

• By Erel
• Sep 8, 2019

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...

 

Attachments

• 1.zip

  9.5 KB · Views: 779

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Signature Capture Tutorial

• By Erel
• May 11, 2011

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...

 

Attachments

• SignatureCapture.zip

  6.4 KB · Views: 4,184

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Using a Git Repository (Version Control) for Beginners

• By wonder
• Jun 21, 2017

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...

 

Last edited: Jun 22, 2017

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LockBox3 (Delphi) AES encryption exchange with B4A/B4J

• By OliverA
• Oct 5, 2018

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...

 

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Google Maps with FusedLocationProvider

• By Erel
• Sep 13, 2017

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...

 

Attachments

• GoogleMapsWithFusedLocationProvider.zip

  10.4 KB · Views: 1,374

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Google Maps

• By Erel
• Feb 24, 2016

Installation instructions:

- Register your app in Google developer console: https://console.developers.google.com
You need to enable Google Maps Android API.
Then click on...

 

Attachments

• GoogleMapsExample.zip

  8.4 KB · Views: 4,546
• GoogleMaps.zip

  19.4 KB · Views: 4,900

Last edited: Aug 21, 2019

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WhatsApp Layout Example (Tabstrip + CLV)

• By Douglas Farias
• Oct 19, 2018

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

...

 

Last edited: Aug 15, 2019

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Happy birthday to you (Beep example)

• By Douglas Farias
• Nov 26, 2018

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

B4X:

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

 

Attachments

• parabens.zip

  217.9 KB · Views: 641

Last edited: Aug 14, 2019

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Ventilator Example (it's really windy)

• By Douglas Farias
• Oct 19, 2018

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...

 

Last edited: Aug 14, 2019

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Simple views colision (RPG Game)

• By Douglas Farias
• Jul 31, 2019

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...

 

Attachments

• colisao.zip

  49.7 KB · Views: 493

Last edited: Jul 31, 2019

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OpenCV real time car detection examples, by @moster67 (and friends)

• By JordiCP
• Jun 13, 2017

This is a full working example of real time ObjectDetection (in this case, cars) using cascadeClassifiers, getting the input from a recorded video file, making use of Videocapture. The example was...

 

Last edited: Jun 13, 2017

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AMD Ryzen processor & Android emulator AVD

• By peacemaker
• Apr 6, 2019

If you have modern processor from AMD (Ryzen) - x86-variants of AVD cannot work by default.
Android emulator now requires the processors with a virtualization only.

By default Intel processors...

 

Last edited: Apr 7, 2019

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Check the Network State and Wifi SSID Name with reflection

• By Asim A Baki
• Dec 8, 2017

============= MANIFEST =====================

B4X:

AddManifestText(
<uses-sdk android:minSdkVersion="5" android:targetSdkVersion="19"/>
<supports-screens android:largeScreens="true"...

 

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RC4 encryption to transfer data between Android and PC

• By cenyu
• Aug 15, 2018

Hi,

On one of my projects, I had to transfer sensitive data from Android to PC but - with RC4 encription.
I wrote a little code that I want to share with you...
Maybe Android supports RC4...

 

Attachments

• rc4.zip

  47 KB · Views: 604

Last edited: Aug 16, 2018

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Base app for new user to rapid build app

• By tuhatinhvn
• Aug 20, 2018

Update 29/8/2018: i uploaded new version without FIREBASE to help who dont need

B4A is very good app to build Android app.
I want to use it built app same as Android Studio, so i make a...

 

Attachments

• base-app-source.zip

  409.3 KB · Views: 1,146
• baseapp-withoutFIREBASE.zip

  408.8 KB · Views: 966

Last edited: Aug 29, 2018

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[B4X] Blockchain Example - Create Your Own Cryptocurrency (part 1/2)

• By wonder
• Dec 13, 2017

Blockchain
A digital ledger in which transactions made in bitcoin
or another cryptocurrency are recorded chronologically and publicly.
In more general terms, it’s...

 

Attachments

• blockchain example.zip

  2.8 KB · Views: 1,154

Last edited: Dec 13, 2017

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Facebook login no event raised fix

• By Brandsum
• Jul 8, 2019

Hi,

If your Facebook and firebase configurations are all ok but the auth event is not raising or if you are getting An account already exists with the same email address but different...

 

Last edited: Jul 24, 2019

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CAM2FTP create time elapsed videos

• By Luis Marcom
• Jul 6, 2019

This app save each image into a server via FTP
and if you want download all images to merge into a video

Esta App salva cada imagen en un servidor via FTP
y si lo deseas puedes bajar todas las...

 

Attachments

• Capture+_2019-07-05-23-44-24-min.png

  202 KB · Views: 361
• Capture+_2019-07-05-23-44-57-min.png

  26.8 KB · Views: 368
• 2019-07-06_000441.jpg

  21.1 KB · Views: 343
• 2019-07-06_000511.jpg

  38 KB · Views: 330
• 2019-07-06_000526.jpg

  10.7 KB · Views: 316

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[B4X] - Google sheets and localizator

• By hatzisn
• Apr 16, 2019

Hi everyone,

there is a new way to create the localizator class csv file and it is as easy now as it could never be in the past. Just watch the following video:

(23-6-2019)

In order...

 

Last edited: Feb 6, 2021

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BlueTooth Printing via SPP

• By timwil
• May 9, 2012

I finally have reliable, stable printing to a blue tooth printer (Citizen CMP-10 and CMP-20) from my Samsung 5570L Galaxy Mini Android Device running v2.3.6

Attached is a skeleton project...

 

Attachments

• BTPrint.zip

  8.7 KB · Views: 6,588

Last edited: May 9, 2012

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