Tutorials & Examples

The B4X documentation booklets are available in PDF format, Download Link.
All files are included in the zip file in the link above, pdf booklets and all the source code.

You can also...

 

"Code smells" are common patterns that can indicate that there is a problem in the code. A problem doesn't mean that the code doesn't work, it might be that it will be difficult to maintain it or...

 

Many things have changed in B4X and also in the underlying platforms. I will try to list here all kinds of (old) features that have better alternatives.
B4X is backward compatible so these...

 

These instructions are outdated. Please see the instructions here instead: https://www.b4x.com/b4a.html

 

Please follow the installation (and configuration) instructions if you have not done it yet:
http://www.b4x.com/android/downloads.html

In this tutorial we will create a new AVD (Android...

 

Please first follow the installation and configuration instructions in these tutorials:
Installing Basic4android and Android SDK
Hello world - Installing Android Emulator

In this...

 

Introduction

A program called adb.exe - Android Debug Bridge - is the key component that is used to communicate between programs on your desktop and the emulator or device. adb can be...

 

New video tutorial:



Lets start simple:
Each B4A program runs in its own process.
A process has one main thread which is also named the UI thread which lives as long as the...

 

The Basic4Android IDE contains a mysterious tab entitled "Logcat" in the right hand pane.

This archive contains a help file that will tell you what a Logcat is and also contains a more...

 

In this tutorial we will use the following web service to convert currencies:
http://www.webservicex.net/CurrencyConvertor.asmx/ConversionRate?FromCurrency=USD&ToCurrency=EUR...

 

HI,
due i've needed it...here you are:

      Dim url As String
      Dim myHttpRequest As HttpRequest
      url = "https://yourURLhere.html"
      Dim str() As Byte
      Dim form As...

 

Don't use ListView.
Use xCustomListView - it is more powerful, easier to work with and cross platform.

 

The IDE Intellisense is wonderful for actually writing code but for browsing the available objects to see what is on offer it is a bit tedious so this afternoon I have knocked up this pretty awful...

 

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...

 

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...

 

This example shows how to work with the GPS library.

The GPS object is declared in the Starter service. It is easier to put the GPS in a service and not in an Activity as the...

 

An improved version, based on CallSubDelayed is available here.
This example demonstrates how to work with more than one activity and how to pass information between the activities.
In...

 

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...

 

This application gets this html page: Flickr: Explore interesting photos from the last 7 days in FlickrLand... , parses it...

 

The attached program displays the values of the different sensors:

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

 

Opening the browser is very simple.
First you need to add a reference to the Phone library.
Then:

    Dim p As PhoneIntents
    StartActivity(p.OpenBrowser("http://www.b4x.com"))

...

 

Many applications require access to a persistent storage. The two most common storage types are files and databases.
We will cover text files in this tutorial.

The predefined Files object has...

 

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...