Tutorials & Examples

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

Camera2 - Still images and videos

Camera2 library is based on the Camera2 API introduced in Android 5 (API 21).
It is designed to work together with CamEx2 class.
It is supported by B4A v7.3+. The library will be included as...
 

Attachments

  • CamEx2.zip
    22.5 KB · Views: 915
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[B4X] Simple function to highlight searchword in texts in CSBuilder Format

This simple function highlights all occurrences of a search term in a given text and returns the result as a CSBuilder.
The output can then be used for labels or MsgBox text.

B4X: 
 Sub...
 

Attachments

  • Highlight2CsBuilder.zip
    10.1 KB · Views: 346
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CREATE, UPDATE, DELETE AND CONSULT REGISTERS ON GOOGLE SHEET FROM YOUR APPLICATIONS

Searching the internet I found a service that allows you to convert any google sheet into a json api, it has a free version that allows you to consult and add data, connecting to the api is quite...
 
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کانال تلگرام اختصاصی رفع خطاهای زبان فارسی Exclusive Telegram Channel for Persian Language Error Correction

If @Erel permits me, I will introduce my Telegram channel for error correction and provide examples specifically for the Persian language.
I am gathering all sorts of errors and putting them...
 
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[B4X] AS FeatureRequest - Approved and implemented requests

[B4X] [XUI] AS FeatureRequest [Payware]

AS FeatureRequest is a lightweight, easy-to-integrate library that allows you to present a list of potential features to your users, enabling them to vote on the ones they find most valuable. By collecting and prioritizing user feedback, you can accelerate the development of the most desired...
www.b4x.com

In this example I show how easy you can display 2 pages, with the features that are under development and...
 

Attachments

  • AS_FeatureRequest Supabase Approved and implemented requests Example.zip
    181.8 KB · Views: 383
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CustomFloatingMenuButton - B4A Library source code

The attached code shows how to create a Floating Menu Button, you can show the button by clicking on a button or a swipe gesture (right edge of the screen).

This is a guide that hopefully will...
 

Attachments

  • CustomFMB.apk
    277.8 KB · Views: 1,168
  • CustomFloatingMenuButton_SourceCode.zip
    15.4 KB · Views: 1,907
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Conversion of B4A to B4XPages

Introduction

The conversion of the first of my B4A Apps to the newer B4XPages structure was not trivial and involved over 20 hours of research, overcoming misunderstandings, and finding...
 

Attachments

  • Section 1-2.pdf
    469.4 KB · Views: 1,304
  • Section 3 Step 12.pdf
    488.1 KB · Views: 1,056
  • Section 3 Step 1-11.pdf
    501.9 KB · Views: 1,183
  • Section 3 Step 13.pdf
    456.3 KB · Views: 1,173
  • Section 3 Step 14.pdf
    450.6 KB · Views: 1,013
  • Section 3 Step 15-16.pdf
    457.5 KB · Views: 1,119
  • Section 4-5.pdf
    393.4 KB · Views: 986
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[B4X] AS FeatureRequest - Supabase as backend

[B4X] [XUI] AS FeatureRequest [Payware]

AS FeatureRequest is a lightweight, easy-to-integrate library that allows you to present a list of potential features to your users, enabling them to vote on the ones they find most valuable. By collecting and prioritizing user feedback, you can accelerate the development of the most desired...
www.b4x.com

In this example I show you how to use supabase as a backend for the AS_FeatureRequest quickly and easily...
 

Attachments

  • AS_FeatureRequest Supabase Example.zip
    179 KB · Views: 348
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Using Camera2 with Zxing for live scan of 1D and 2D barcodes

I have used @Erel's sample project from here:

Camera2 - Still images and videos

Camera2 library is based on the Camera2 API introduced in Android 5 (API 21). It is designed to work together with CamEx2 class. It is supported by B4A v7.3+. The library will be included as an internal library in the next update. Both image capturing and video recording are supported. CamEx2...
www.b4x.com

Have added a timer to get the preview bitmap every...
 

Attachments

  • core-3.3.2.zip
    493.6 KB · Views: 1,630
  • Camera2.zip
    16.5 KB · Views: 1,604
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Android 14 / targetSdkVersion 34 and Services

B4A v13.0+ should be used with targetSdkVersion 34+.

Android 14 continues the longtime trend of making services less flexible and more difficult to use (converging to iOS background tasks...
 
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[B4X] AS BottomActionSheet - Small Icon

[B4X] [XUI] AS BottomActionSheet

This view makes it quick and easy to let the user make an action. You need: AS_DraggableBottomCard I spend a lot of time in creating views, like this and to create a high quality view cost a lot of time. If you want to support me and further views, then you can do it here by Paypal or with a...
www.b4x.com

In this example I will show you how you can add a small icon to an item and customize it to your needs.

A...
 
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[B4A] Extended example of ContactsUtils to place shortcuts to contacts on the home screen

For some time now, it has not been possible to place short links to contacts on the home screen via the Contact Apps. Instead, the selected contact is always placed as a widget. However, since I...
 

Attachments

  • contact linking.zip
    10.6 KB · Views: 427
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[B4X] AS Settings - ColorChooser Property

[B4X] [XUI] AS Settings

Introducing a new library that allows you to create your own settings page with minimal code. This library comes equipped with automatic saving and loading features, making it incredibly easy to manage your settings. It supports booleans, free text, numbers, comboboxes, action buttons and more...
www.b4x.com

This setting allows users to select a color. For example, to change the main app color, which is a premium feature in...
 

Attachments

  • AS Settings ColorChooser Example.zip
    179.2 KB · Views: 374
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TessBaseAPI ocr

hello, a small library of TessBaseAPI "tesseract4android-2.1.0" Ocr, you need to download tesseract4android-2.1.0.aar and junit-4.4.jar as Depends, for the tessdata languages...
 

Attachments

  • tess4.1.zip
    24 KB · Views: 982
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[B4X] Localizator - Localize your B4X applications

Localizator is a cross platform solution for strings localization.

The strings are defined in an Excel workbook.



They...
 

Attachments

  • B4J_LocalizatorExample.zip
    5.7 KB · Views: 1,930
  • ExcelWorkbook.zip
    7.1 KB · Views: 2,399
  • B4i_LocalizatorExample.zip
    6.1 KB · Views: 1,587
  • Localizator.bas
    4.4 KB · Views: 2,347
  • B4A_LocalizatorExample.zip
    11.6 KB · Views: 1,909
  • B4J_LocalizatorConverterSource.zip
    10 KB · Views: 1,120
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Running B4A and B4J under Linux with wine - fully functional

I have just managed to install B4A and make it run (including B4ASdkManager) on my Xubuntu 18.04 and, since I have lost two days and one night putting things together, I thought it will be a good...
 
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[B4X] Simple audio call over internet with own TURN/relay server

Attachments

  • [B4A] Socket.io Simple Call Example.zip
    116.8 KB · Views: 1,544
  • [B4i] Socket.io Simple Call Example.zip
    111.7 KB · Views: 1,217
  • [Server] Socket.io Simple Call Example.zip
    2.4 KB · Views: 1,460
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Introduction to the libGDX library

Introduction to the libGDX library​

What is libGDX ?

libGDX is a game engine. As we saw in the first tutorial, a game engine provides a framework to create...
 
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B4A-Bridge source code

B4A-Bridge is made of two components. One component is running on the device and the other is embedded in the IDE.
The device side is the server side. It waits for connections and when a...
 
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Offline Continuous Speech Recognition

This is a very old project which is unlikely to function correctly on newer versions of Android. The link to the project should still be active and if you want to use it for reference to...
 

Attachments

  • copyright.txt
    1.5 KB · Views: 2,327
  • Library.zip
    403.1 KB · Views: 1,344
Last edited:
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