Tutorials & Examples

The following solution allows you to access your Android device over the internet. The device must be connected to a...

 

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This guide is obsolete !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...

 

This is the last example for now, it provides a midi monitor for messages based on the midi channel that the messages are played on.

It uses Informatix's wonderful accelerated surface to take...

 

Some users asked here for a simple SQLite project as an example to make their first steps in SQLite.
The already existing examples seem beeing somewhat complicated for beginners.

These...

 

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...

 

Just bought an Android TV box and I mentioned that you can connect to the bridge via LAN (usually WiFi). Even it shows "Not connected to wireless network" and doesn't show a ip address the...

 

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

CharSequence is a...

 

The problem: If anyone is using the Google Play's Internal Testing feature to make your app available for selected users, be aware that Google changes the app and therefore the APK signature...

 

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...

 

Hi all.
I found this example in some old folders on my pc and decided to share here.
it is a simple Bomb Countdown with timer, sound and vibration.

I think the most important here is the...

 

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...