Tutorials & Examples

Old tutorial. Don't use services. Use receivers.
Broadcast receivers are program components that can handle broadcasted messages. These messages usually notify about a system event.

There...

 

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

For example...

 

SQLCipher is an open source project that extends SQLite and adds full database encryption.
License: https://www.zetetic.net/sqlcipher/open-source/

B4A SQLCipher is a special subtype...

 

Edit: StateManager was written in 2011. I don't recommend using it for new projects. Use B4XPages + KVS2 instead.

StateManager is a code module which takes care of handling the application...

 

It is recommended to use TabStripViewPager for new projects: https://www.b4x.com/android/forum/threads/63975/#content


The TabHost view is a very important view. It allows you to add...

 

The attached program displays the values of the different sensors:

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

 

This example implements a simple "walkie talkie".

(src: wikipedia)...

 

Android 3.1 and above devices support Usb host mode. With this feature you can connect to regular client usb devices. Some devices are automatically recognized by the OS and are simple to work...

 

This library is based on the following open source project: https://github.com/astuetz/PagerSlidingTabStrip
License: http://www.apache.org/licenses/LICENSE-2.0

It...

 

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...

 

With the new Sip library you can make audio calls using Voip (Voice over IP) services.
Sip features were added in Android 2.3 (API level 9). Note that not all devices above Android 2.3 support Sip...

 

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...

 

Below is a table listing features of Visual Basic 6 and their equivalents in B4A.

If you find errors or wish to add other features, post a reply here to have your input integrated into the table...

 

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...

 

Types

Basic4android type system is derived directly from Java type system.
There are two types of variables: primitives and non-primitives types.
Primitives include the numeric types: Byte...

 

It is simpler to parse XML with Xml2Map class: https://www.b4x.com/android/forum/threads/b4x-xml2map-simple-way-to-parse-xml-documents.74848/

The XmlSax library provides an XML Sax...

 

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...

 

Downloading resources is simpler with the new Resumable Subs feature.

Using Wait For we can wait for the JobDone event in the same sub that started the download.
No...

 

Basic4android v1.8 introduces a new tool named Manifest Editor.
Every Android application includes a file named AndroidManifest.xml.
This is an XML file that describes the application for the OS...

 

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...