Tutorials & Examples

Background

One of the most common issues that Android developers face is the need to adopt the user interface to devices with different screen sizes.
As described in the visual designer...

 

KeyValueStore v2 is available here: https://www.b4x.com/android/forum/threads/b4x-keyvaluestore-2-simple-powerful-local-datastore.63633/

In many cases applications need to store all...

 

This is an old tutorial. There are now simpler and better ways to achieve this effect.

For example...

 

Edit: A better kiosk implementation is available: https://www.b4x.com/android/forum/threads/device-owner-tasklock-kiosk-apps-2017.81765/#post-518018

Kiosk mode applications are...

 

Correct link: https://www.b4x.com/android/forum/t...s-firebase-cloud-messaging-fcm.67716/#content

 

This example implements a simple "walkie talkie".

(src: wikipedia)...

 

OkHttpUtils2 is now available. OkHttpUtils2 is an improved version and is recommended for new projects. You shouldn't use HttpUtils (v1)!

HttpUtils is made of a code module and a...

 

Note: You should use B4A 6.0 or above for this tutorial.

With the ACToolBar(Light|Dark) object we can get access to the Menu object of the activity. This opens the possibility for modifyable...

 

New video tutorial:


AsyncStreams allows you to read data from an InputStream and write data to an OutputStream without blocking your program. The reading and writing are done...

 

A simpler and better looking solution is now available: https://www.b4x.com/android/forum/threads/tabstripviewpager-better-viewpager.63975/

StdActionBar library allows you to...

 

Attached you find a pdf tutorial about Designer Scripts & AutoScale.
It includes Erels Designer Scripts Tutorial and a new AutoScale Tutorial.
It's an extract of two chapters from the next...

 

The MediaPlayer is used to play audio files.
MediaPlayer supports formats like: mp3, midi, wave and ogg. The full list is available here: Android Supported Media Formats | Android Developers...

 

The ScrollView is a very useful container which allows you to show many other views on a small screen.
The ScrollView holds an inner panel view which actually contains the other views.
The user...

 

The attached program displays the values of the different sensors:

It creates a PhoneSensors object for each type of sensor.
As you can...

 

The result of compiling your application is an APK file. This is a package file that contains the compiled source code and the assets files.
The APK file must be signed before installation...

 

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...

 

DateUtils is a code module with a set of useful date and time related methods.
It complements DateTime api, it doesn't replace it.

The methods included in DateUtils:

'Calculates the period...

 

Edit: If you are using B4A v7.8+ then a newer version of B4A Sdk Manager is preinstalled. Follow these instructions instead: https://www.b4x.com/b4a.html#installation

The GUI...

 

[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...

 

Newer example based on B4XSerializator: https://www.b4x.com/android/forum/threads/72149
AsyncStream v1.50 (part of RandomAccessFile library) includes support for sending and receiving...