Tutorials & Examples

Android supports a special format of PNG images that can be resized by replicating specific parts of the image.
This images also include padding information.
These images are named nine-patch...

 

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...

 

As an answer to the thread Forms alike, I thought that the examples below would be of general interest.

Attached there are 4 examples with two same layouts but with different managements...

 

Hi everyone,

For the last 10 hours, I browsed every threads in "Share your creations" because I wanted to gather a lot of source code. About 1/6 of the posts actually have source code shared...

 

Regular expressions are very powerful and make complicate parsing challenges much easier.
This short tutorial will describe the usage of regular expressions in Basic4android.
If you are not...

 

Starting from Basic4android v2.50 you can compile your project, or part of it to a regular library.

Why should I compile a library?

• Break large projects into several smaller (more...

 

Hi all

*EDIT3*

For a much easier to set up and faster Android emulation please now look at this thread:

GeanyMotion...

 

Well,

As JamesGreaves requested,
"So do you not think it would be of value to have even something like @walt61 has created but online?"...

 

B4A v3.80 adds support for conditional compilation.

From Wikipedia:

In computer programming, conditional compilation is compilation implementing methods which allow the compiler to...

 

Basic4android v1.2 includes a new type of module which is the static code module.
Adding a static code module is done by choosing Project - Add New Module - Code Module.

Unlike Activities and...

 

NFC v2.00 adds support for low level access to the NFC features. This allows reading and writing from NFC tags.

The NFC library provides three features:
- Reading Ndef tags based intent filters...

 

Edit: please see the updated tutorial: https://www.b4x.com/android/forum/threads/62488/#content

Starting from v2.70, the visual designer supports custom views.

Note that the WYSIWYG...

 

A large button is displayed. When the user presses on the button, the user is asked to say something.
The voice recognition engine converts the audio to text.

Then the text is converted back to...

 

This tutorial is no longer relevant. Google doesn't allow using WebView to access the server response. Updated tutorial...

 

Attached you find an example with a ScrollView with a Panel higher than the screen.

The layouts are designed in the Designer, not in the code.

There are 2 layout files:
- Main with the...

 

StateListDrawable is a drawable objects that holds other drawables. Based on the view's current state a child drawable is selected.
StateListDrawable holds a list of states. States can be...

 

This example demonstrates how you can use an OCR web service to recognize text in camera images.

The program allows you to take a picture and then send it to OCRWebService.

OCRWebService...

 

It is recommended to use HttpUtils2 instead of this code module. HttpUtils2 is more powerful and is easier to work with.

As discussed in the Services tutorial, some tasks are...

 

New method to add shortcuts: https://www.b4x.com/android/forum/threads/support-for-app-shortcuts.86663/#post-548645
Updated instructions for this method...

 

It is recommended to use Firebase for new projects: FirebaseNotifications - Push messages / Firebase Cloud Messaging (FCM)

This solution allows you to use the standard GCM push...