Tutorials & Examples

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

App Bundle - Steps to updating Existing App (apk to aab)

This Tutorial is for those who already have an existing application in the play store that is APK and want to switch to App Bundle (AAB) which will become compulsory in August 2021.

Steps for...
 
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Valid EAN13 Barcode String

Generate random valid EAN13 barcode string:
B4X: 
Public Sub BarcodeEAN13() As String
    
    Dim brcod As String = Rnd(100000000,214000000)
    brcod = "950" & brcod  '<<< change the beginning 3...
 
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[B4X] RSS Viewer using xCustomListView

Attachments

  • RSS Example.zip
    20.7 KB · Views: 1,190
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[B4X] JSON crack - Visualize your JSON as a diagram

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Understanding Network security configuration

Every developer must understand this article if developing any kind of network communication app.

Android os recent versions put end apps users privacy at the heart of its platform, the network...
 
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Now you can debug android app directly under Windows11

Intel's Bridge technology will allow Android apps to run natively on Windows 11, now Microsoft released the beta version。

1. download windows11 from...
 
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[B4X] AS ViewPager - Auto Play

In this example project you can see how to add an auto play feautre to the AS ViewPager.

[B4X] [XUI] AS ViewPager based on xCustomListView

Hey, thanks to @KZero for his good zPager class, i was able to extract a few things from it to make this cross platform view. I spend a lot of time in creating views, some views i need by my self, but some views not and to create a high quality view cost a lot of time. If you want to support...
www.b4x.com
...
 

Attachments

  • AS ViewPager Auto Play.zip
    10.2 KB · Views: 640
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? [B4X] [XUI] [B4XPages] Using B4A GPS to create a BASIC weather app - Newer developers

Hello All
Here we have an simple example on how you use your Android device GPS in conjunction with OpenWeather API, this is just a simple example and can obviously be changed and updated by...
 
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Chat Mqtt Over Internet Free Source Code B4A/B4J

Attachments

  • B4JChatMqtt.zip
    8.3 KB · Views: 876
  • B4AChatMqtt.zip
    13.7 KB · Views: 985
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Test Card Always Approves - Item unavailable in your country

Google never seizes to surprise us and its latest miracle is the following:



In order to fix this no matter if you have an EmailList set with the testers I have done two things. I do...
 
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[B4X] AS_TabMenuAdvanced + ASPopupMenuAdvanced

This is a example how to use the AS_TabMenuAdvanced together with the ASPopupMenuAdvanced.

For this example you need the 2 libs...
 

Attachments

  • AS TabMenuAdvanced + ASPopupMenuAdvanced Example.zip
    455.1 KB · Views: 896
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In App Billing - steps required in Google Console

This applies to Google Billing V4.

I was following the tutorial to add in app billing to my app and I found that it would not work in test...
 
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Api Levels

Searching the internet I came across this site that cumulates all the necessary data for the B4A developer:

Android API Levels

A quick reference table of Android versions with SDK & API levels, version codes, codenames, cumulative usage, and more.
apilevels.com
 
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[B4X] AS PopupMenuAdvanced - ComboBox



This is a small example to demonstrate what is possible with the beautiful view...
 

Attachments

  • AS PopupMenuAdvanced ComboBox.zip
    73.9 KB · Views: 1,598
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Using fixer.io to get current Currency rates

This Tutorial is how to use the free service from fixer.io
in your own apps.

Fixer.io is a free JSON API for current and historical foreign exchange rates published by the European Central...
 
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[B4X] [DSE] Designer Script Extensions

The soon to be released versions of B4A, B4i and B4J include a new feature named: designer script extensions. The new feature allows calling B4X code from the visual designer scripts.
Note that...
 

Attachments

  • DSExample.zip
    182.8 KB · Views: 1,307
  • DSExampleCLV.zip
    187.6 KB · Views: 1,178
  • DSExampleNumpad.zip
    18.8 KB · Views: 1,167
  • DSExampleToolbar.zip
    123.2 KB · Views: 1,130
  • DesignerUtils.b4xlib
    3.7 KB · Views: 1,035
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Push messages with Firebase and B4A: Some additional hints and a working example

Hi,
I played around with push notifications based on Firebase Cloud Messaging (FCM).
I followed the tutorial at...
 
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Creative UI/UX Designs + Source Code

Well, from today I am here to help you create more beautiful applications.
B4X Family is a wonderful yet very simple tool for designing functional and beautiful applications
I have been acquainted...
 

Attachments

  • 1.profilePagerPanel.zip
    142.7 KB · Views: 1,653
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✅ [B4X] [XUI] [B4XPages] B4A PreoptimizedCLV lazy loading from SQLite and CSV - Newer developers

Hello to you all,
Welcome to Sheldon Coopers and Amy Farrah Fowlers fun with flags

Here is a simple example on using B4XPages with both an SQLite database and also a CSV file with multiple...
 
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In App Purchases Setting Tutorial - New Google Play Console - Accurate as of 2020-09-26

Hey everyone,

This is a tutorial on how you can add In App Purchases to your Android App in the New Google Play Console.

1) Add GooglePlayBilling library in your project and the following code...
 
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