Tutorials & Examples

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

B4x on Mac M1with Parallels and Windows 11 Arm

The native use of B4x on M1 CPU is not possible. But using Parallels and Windows 11 Arm makes it possible to have a perfect working development environment. With one problem: there is no JavaFX...
 
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B4A on Parallels M1 MAC

B4A works fine in Parallels windows on M1 MAC.
Here are compilation times for same, fairly large project:
Could Erel comment on significant differences in time execution of various parts.
In...
 
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[B4X] B4XCache - simple and useful cache collection

B4XCache is a new collection added in B4XCollections v1.10.
It is key / value store collection, similar to Map.
When the cache reaches the set maximum size, the least recent used items are removed...
 
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Firebasemessaging (FCM): Receive messages in doze/sleep mode

Issue: Device doesn't receive FCM messages while in sleep/doze mode

Important to know: Google uses 2 different api's with different keywords



So...
 
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Test web back ends in your computer without fiddler and see what your app will post

Two great tools for testing webapps and webhooks

Researching the internet I have found two great tools that can be used for testing webapps and webhooks. The first is called ngrok. What it does is that it creates a tunel to your web app and makes it accessible from the internet through https without port forwarding. It acts as a kind of...
www.b4x.com
 
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Find a missing value using Approximation & Guesswork (Goal Seek)

I have written a few Financial Calculators over the past couple of weeks, and one approach I've found extremely useful is Approximation and Guesswork.
So I figured, why not share the approach with...
 
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✅ [B4X] [XUI] [B4XPages] Simple B4A stock ticker code using JSON REST API - Newer developers

Hello to you all,
Here is a simple example on retrieving data from a REST API requested using the JSON Generator (you could also use http URL download), the same JSON library is also used to parse...
 
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[Installation Guide] Amazing Order Taking App

Disclaimer: I do not create/own the original project source code therefore please don't ask me to provide full support. I am just helping a member to make this project work. I do not get any money...
 
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[Installation Guide] [B4A] Supermarket, Restaurant, Pharmacy, Store Delivery

Disclaimer: I do not create/own the original project source code therefore please don't ask me to provide full support. I am just helping a member to make this project work. I do not get any money...
 
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[UI] [B4A] Real State App UI Example + Source Code

Attachments

  • Real State App.zip
    264.7 KB · Views: 1,181
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Publish New App to Google Play

1. Click on button "Create app".


2. Enter your App name. Select App or Game.


3. Scroll down. Check all the declarations. Click on button "Create app".


4...
 
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Working with Calendars using ContentResolver (Query, Insert, Update, Delete)

Hello,

i´m playing around with the Calendars on my Device and want to Query them. I found out how it works using ContentResolver querying the ContentProvider available in Android.

You can...
 

Attachments

  • GoogleCalendarClientV0.12.zip
    20.4 KB · Views: 1,005
  • GoogleCalendarClientV0.13.zip
    20.4 KB · Views: 1,030
  • GoogleCalendarClientV0.2.zip
    21.7 KB · Views: 963
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Using B4A to develop for a Wear OS 2 watch

I just got a Skagen Falster 2 watch and logged my first experiences of trying to use B4A to develop aps for it. Here's what I did!

First of all setup the watch with the Wear OS app on a phone...
 
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[B4A] [Class] [Contacts] wmContactsUtils - enhanced ContactsUtils

This is an enhanced version based on @Erel 's ContactsUtils v1.20.

NOTE: DeleteContact didn't work on an Amazon Fire tablet with Android 5.1.1 but did on a Moto X Style phone with...
 

Attachments

  • wmContactsUtils.bas
    37.1 KB · Views: 582
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Material Design Icons (Update B4A / B4J)

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[SMM] Top sites example

This example uses SimpleMediaManager to show a list of 400 top sites, based on Alexa dataset.



Each item is made of two panels and a label:
- Panel for the favicon.
- Panel for the...
 

Attachments

  • Project.zip
    231.5 KB · Views: 539
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[B4X] MQTT - Connect & Reconnect

The ConnectAndReconnect sub takes care of connecting to the broker and reconnecting if the connection has broken.
It sends a "ping" request every 5 seconds to help the MQTT client recognize...
 
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Transfer files across memory boundary

Hi all,

This is a simple example of moving files across the internal/external memory boundary.
EG Transferring a CSV file from an external location to an internal folder to load a database in the...
 

Attachments

  • XFer.zip
    13 KB · Views: 459
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[B4X] Smart String Literal

The "smart string" literal is a more powerful version of the standard string literal.
It has three advantages:
  1. Supports multi-line strings.
  2. No need to escape quotes.
  3. Supports string...
 
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ABWearOS Library 1.0

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