Tutorials & Examples

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[B4X] [BitmapCreator] Cross platform Falling Sand game



The main challenge here is the performance. All particles are updated if needed and redrawn every cycle.

The Particles...
 

Attachments

  • B4A_FallingSand.zip
    25.6 KB · Views: 995
  • B4i_FallingSand.zip
    177.6 KB · Views: 790
  • B4J_FallingSand.zip
    24.6 KB · Views: 820
  • GameUtils.bas
    6.5 KB · Views: 900
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Run B4A in Ubuntu 19.04

1) sudo apt install -y wine winetricks

2) winetricks dotnet452

3) wine B4A.exe
Screenshot from 2020-02-22 22-40-04.png
4) winetricks
install windows DLL or component
vcrun2010



5) right click icon B4A...
 
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[B4X] [B4XPages] Barcode Reader



B4A + B4i barcode reader.

Don't miss:

- #PlistExtra in B4i.
- Manifest code + #AdditionalJar in B4A

Depends...
 

Attachments

  • BarcodeReader.zip
    183.5 KB · Views: 2,335
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[B4X] Using/running B4A and/or B4J on 64 bit Linux Mint 20.2 Cinnamon with 64 bit Wine

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Pinch Zoom and Move View tutorial

[Class] Pinch Zoom and Move View

I had the need for my purposes to do the Pinch Zoom in contemporary Move to a View, now I put my code available to anyone who might be in need, just to get...
 

Attachments

  • Screenshot_2012-11-02-20-02-13 (ridotta).jpg
    28.8 KB · Views: 2,627
  • PinchZoomAndMove_1.45.zip
    115 KB · Views: 4,574
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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: 1,134
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[B4X] JSON crack - Visualize your JSON as a diagram

Here is a nice tool that visualizes the JSON like a diagram. Pretty cool.

JSON Crack | Transform your data into interactive graphs

JSON Crack Editor is a tool for visualizing into graphs, analyzing, editing, formatting, querying, transforming and validating JSON, CSV, YAML, XML, and more.
jsoncrack.com
 
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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: 563
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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: 803
  • B4AChatMqtt.zip
    13.7 KB · Views: 910
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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: 841
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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: 1,515
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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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