Tutorials & Examples

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...

 

There are many ScrollView examples on the forum, I made a summary of them for my own use and I think it would be interesting for others.

Creating a table view based on ScrollView...

 

API documentation - B4a, B4i, B4J and B4R (i.e. B4X) Object Browser (which also includes Code Snippet Management)

Hi everyone,

As you may or may not be aware, I have embarked on a...

 

Android 4+ devices support Wifi Direct (Wifi P2p). Wifi Direct allows you to connect two devices over wireless without an access point. It is similar to Bluetooth with a much extended range and...

 

This is an old tutorial. I recommend to instead watch the visual designer video tutorial: https://www.b4x.com/etp.html

There are several features in B4A that help you target Android...

 

Old and irrelevant tutorial. Follow this one instead: [B4X] Net library (FTP, SMTP, POP) with Wait For

This tutorial covers the FTP object which is part of the Net library.
The Net...

 

JSON format is a a format similar to XML but usually it is shorter and easier to parse.
Many web services now work with JSON. JSON official site: JSON

Using the new JSON library, you can...

 

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...

 

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...

 

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...

 

Android has very good support for custom input method editors (IMEs).
The downside for this powerful feature is that interacting with the soft keyboard can be sometimes quite complicated.

This...

 

The Excel library is a new library that wraps the open source jexcel project and allows you to read or write Excel workbooks. This library supports XLS files. The new xml based format (xslx) is...

 

Installation instructions:

- Register your app in Google developer console: https://console.developers.google.com
You need to enable Google Maps Android API.
Then click on...

 

1. Edit: In B4XPages the permission result event signature is: Wait For B4XPage_PermissionResult (Permission As String, Result As Boolean)
2. Important to read...

 

Edit: widgets are handled with receivers now. See the attached example.

This tutorial will explain how to implement your own home screen widgets (also named App Widgets).

It is important...

 

This is an old tutorial. All new implementations of network solutions should be based on AsyncStreams.

The Network library allows you to communicate over TCP/IP with other computers or...

 

The Animation library allows you to animate views.
These small animations are really nice and can affect the user overall impression of your application.

The attached program demonstrates the...

 

The HttpServer library is a new library, based on an open source project named Jetty. This library allows you to easily embed an Http server in your application.

Http server means that you...

 

There are several versioned components that affect the compilation process and the runtime behavior of our apps.
The purpose of this tutorial is to explain the differences between them and help...

 

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...