Tutorials & Examples

Hi,

Here is how you can set the scale mode of an ImageView like CSS background-size property.

'scale = cover,contain,fill
Public Sub SetImageView(iv As ImageView,bmp As Bitmap, scale As...

 

This guide is obsolete ! It is no more updated.
Please use the B4X Booklets.

Here is a Beginner's Guide in pdf format.
The source code for the example programs is included.

All...

 

Google Play App Signing service allows developers to let Google store the app signing key for them.
Developers need to use a different key, the upload key, to sign the app before release.
The...

 

if you want run any shell command as superuser(you must have rooted phone), try this:

Dim Command, Runner As String
Dim StdOut, StdErr As StringBuilder
Dim Result As Int
Dim Ph As Phone...

 

* * * UPDATE * * *

July 8th, 2012 - New DataBase Class http://www.b4x.com/forum/additional-libraries-classes-official-updates/22118-class-databases.html


JUST POSTED - The...

 

Edit: Better to use CLVExpandable class: https://www.b4x.com/android/forum/t...g-or-collapsing-xcustomlistview-items.106148/

Compatible with B4A...

 

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

 

Error:
It might happen that, when combining multiple native (JNI) libraries, your Android app will crash with an UnsatisfiedLinkError.

Why does this happen?
Well...

 

B4A v6.80 adds several new features related to the ability to format rich strings.

CharSequence is a...

 

Please use XUI2D for new games: https://www.b4x.com/android/forum/threads/xui2d-example-pack.96454/

Spoiler

BitmapCreator is a relatively new cross-platform class for low level...

 

Starting from Android 7 we can extract more information about the satellite navigation status.
GPS is the first satellites system (the American system). There are several more systems now...

 

When I started again developing in B4A, I looked around my developed desktop applications to make something similar, as I will know what the result should be.

I choose my small attendance program...

 

HeartRateMonitor class searches for peripherals with the heart rate service (0x180D).

Once a peripheral device is found and connected then a notification is set for the heart rate measurement...

 

Not sure how many developers are familiar with the list of recent subs:

You can open it with Alt + N.
It is very useful...

 

The purpose of this framework is to allow you to easily add different types of charts to your projects.
The current version supports pie charts, line charts and bar charts.

The framework is...

 

Google has changed their policy regarding the following permissions:
READ_SMS, SEND_SMS, WRITE_SMS, RECEIVE_SMS
READ_CALL_LOG, WRITE_CALL_LOG, PROCESS_OUTGOING_CALLS

Only the default phone or...

 

As explained in this tutorial all store apps will soon be forced to target the latest SDK.

This means that we can no longer rely on the OS backwards compatibility features and need to...

 

A lot of developers like me use php as the backend component on a server to communicate with B4x apps. My intention is to create a thread with some "How to's" and best practices. Please feel free...

 

This guide is obsolete ! It is no more updated.
Please use the B4X Booklets.

A User's Guide in pdf format is available here : www.b4x.com/android/files/UserGuide.zip

This...

 

Don't use this. SimpleMediaManager is 100 times more powerful: [B4X] SimpleMediaManager (SMM) - framework for images, videos and more

Downloading images with HttpUtils2 is quite simple...