Tutorials & Examples

Here is another ScrollView example with:
- adding a row
- moving a selected row up and down
- mono-selection, clicking on one row selects it, clicking on another row unselects the previous one and...

 

Hello,

a another Tutorial in the category how to program a nice chat app.
This Tutorial builds on this.

The Realtimedatabase lib. supports filtering, with this feature you can filter your...

 

Hello,

A nice feature is to display whether a user is typing or not.

Most apps have a bubble added or by WhatsApp is a simple "wrtiting.." on top.

This is the result of this...

 

See attached project that you can use to make personalized QR codes with. Image that is superimposed over the QR code should preferably have a transparent background. You can do things like this...

 

Important: This tutorial is for educational purposes only, so we are not encouraging you to use this information for illicit purposes.

Required Andoird 4.4+ (sdk 19+)...

 

General Information

Normally it is not possible to create several widget instances of the same homescreen widget which all display different data.

I found a solution for this and with...

 

Hello All.

Just thought I would share some info with you. Most of our services in our apps would use

Service.StartForeground(1,main_service.n1)

in the service create sub, where...

 

Important for Huawei users (or others):

Make sure your energy settings don't pause your app (even the firebase service). Huawei calls it "protected apps". If your app isn't protected...

 

Hi all.

This example shows the images contained in a certain directory, with pinch zoom and smooth scroll -when image is zoomed- capabilities (provided by JSTouchImageView library, from...

 

I made for beginer detailed description of how to prepare a computer and phone to create mobile applications on the platform Android. I myself Russian therefore made the instruction in Russian and...

 

I'm currently developing an App that'll be released for Android and IOS. It presents "files" to the user, allows them to select a file and then presents the content for editing, and finally allows...

 

Update (2017/10/17): For code changes that make this a true B4X update, see post #4

This relates to the FTP Server code posted here...

 

Update: Code to reconnect added


I've bought a BT handheld scanner on Ebay for about 45€ like this:


It comes with a sheet with barcodes which can be scanned to do some...

 

A new more powerful framework is now available: Remote Database Connector.

This tutorial is a follow up to the previous tutorial that explained how to connect to a MySQL...

 

A code module to automatically generate SetLayout statements with percentage values.

It is more convenient to use than my example:
Create your layouts based on percentages...

 

If you are using B4A v5.80+ then please follow this tutorial: https://www.b4x.com/android/forum/threads/google-maps.63930/#post-404386

GoogleMaps library requires v2.50 or above...

 

Edit: Things have changed with newer versions of Android and new restrictions. Sticky services should not be used any more.

Background service example...

 

B4A-Interpreter

I've made a B4A interpreter that runs B4A-Code on Android
to write easy B4A-test programs on my Phone.
To make an app only copy the source code back to the...

 

This is just a simple example (and yes, there are others doing similar). You can modify this example it by using other colors, gradients, adding other views and so on to have a simple but good...

 

Firebase has several extremely useful free server-based features for developers of mobile apps.

Spoiler: free?

The free "Spark Plan" is suitable for small business applications.​

...