Tutorials & Examples

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

FitBit Authentification and use of the FitBit Web Api (http)

FitBit OAuth and HTTP SDK

You need to define an App in the FitBit Console at https://dev.fitbit.com/apps

Make sure to set your "OAuth 2.0 Application Type" to...
 

Attachments

  • FitBitEx.zip
    11 KB · Views: 622
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Control your Android device from your Windows PC

This is very clever software and when I first saw it, it blew my mind. It took a couple of seconds for me to comprehend what I was seeing.

The program is called ScrCpy and when run on your...
 
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Getting List of Files of a webserver directory via httputils2 & php

When you like to download files with httputils2 you need to know the files by name. There are some examples using ftp or a generated xml file with the contents first. To me this could be easier...
 
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[B4X] get fav icons from a website

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Fan Menu

After all the work I went through to make the simple pie graph, I noticed I had 90% of the code to make a "Fan Menu" type library so I went ahead and created the following prototype...
 

Attachments

  • fan_menu.zip
    221 KB · Views: 1,071
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✅ Retrieving 2 JSON data feeds from an online server (Wear OS watch face) - Newer developers

Hello All
Here we have a simple example of how you use corwin42s WatchFace Library. The WatchFace library is extremely simple to use, corwin42 has done a great job wrapping it, thank...
 

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  • JSON.zip
    13.1 KB · Views: 736
  • LEDCoronavirus_V1.0.0.1.zip
    111 KB · Views: 726
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Updating an embedded DB

A common task we face while enhancing our apps is the need to update the structure of a running DB.
This is relatively easy if you know for sure that your users will all go from version 1 to...
 
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Connect Android to MySQL Database Tutorial

A new more powerful framework is now available: jRDC2.

This tutorial explains the basic concepts required for creating a connection between Android device and a remote server. In this...
 

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  • MySQL.zip
    8 KB · Views: 17,857
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Controlling Sonoff S20 smart power plugs [B4X] [Home Automation]

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Android SMB / CIFS tutorial

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[B4X] [B4XPages] Pleroma / Mastodon Client

Roughly speaking, Mastodon is an open source, distributed, social network a bit similar to Twitter:

Mastodon - Decentralized social media

Learn more about Mastodon, the radically different, free and open-source decentralized social media platform.
joinmastodon.org

Pleroma is a lightweight implementation of Mastodon with some...
 
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OpenCV and Tensorflow methods for chessboard and chessfigures detection/classification

Two apps show methods and their usage to recognize chess figures and their position based on a camera shot, one using only OpenCV image processing and utils (Chessboard OCV) and the second one...
 

Attachments

  • Chessboard image processing.pdf
    229 KB · Views: 1,287
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Integrating In App Purchase in B4A Platform

 
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[B4X] [B4XPages] Firebase Push Example

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  • Push.zip
    7.3 KB · Views: 2,230
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Subnet Scanner

Here is a simple subnet scanner. It scans the current class C subnet for a particular port number and tries to open a connection.

It logs all the IPs that are found to have that port open in a...
 

Attachments

  • Scanner Example.zip
    4.2 KB · Views: 659
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intent for beginner - messages between apps

Part 1

1- Intent is exactly a Specific Message between Android Apps.
Building this message is simple in B4A:
B4X: 
dim intent1 as intent

2- Any message (ie: intent) has a specific purpose...
 
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EasyDeviceInfo (with inline Java Code)

It incorporates this Github project via inline java code. The project reports a whole lot of information about your device and write the results to the B4A log:

B4X: 
** Activity (main)...
 

Attachments

  • b4aEasyDeviceInfo.zip
    15.5 KB · Views: 1,235
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[B4X] Like Animation - smooth and beautiful transition

This is a simple like animation.
It looks smoother and better in real.

LikeAnimation: 
Private Sub LikeAnimation(xlbl As B4XView,duration As Int)
    Dim txt_size As Float = xlbl.TextSize
    If...
 

Attachments

  • Like Animation.zip
    9.8 KB · Views: 705
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Read / Write Excel files on Android

The Excel library is a new library that wraps the open source jexcel project and allows you to read or write Excel workbooks. This library supports XLS files. The new xml based format (xslx) is...
 

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  • ExcelExample.zip
    12.8 KB · Views: 10,235
  • ExcelLibrary.zip
    13.1 KB · Views: 9,546
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[B4X] Library Templates

Seeing the new Template feature, I thought I'd use it for the new libraries I create.
I created a Template that opens three folders (B4J, B4A, B4I) with the library.

In addition to...
 

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  • NewLibrary.b4xtemplate
    15.3 KB · Views: 685
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