Tutorials & Examples

This demo app shows how to use RenderScript ScriptIntrinsics in real time image processing. As an example the camera preview is converted into a cartoon like image. The processed image can be...

 

This tutorial explains the differences between the three methods.

The bottom line is that the best option is to use LoadBitmapResize and set the container gravity, if possible, to Gravity.CENTER...

 

Starting from B4A v7.0 the following warning will appear for DoEvents calls:
DoEvents is deprecated. It can lead to stability issues. Use Sleep(0) instead (if really needed).

The purpose of...

 

In my new app, I am using the Starter service. I have a few variables I am trying to create, and consume them in my "main" form.
But when I start my app, I get an error message of an undeclared...

 

I added a new feature to my apps yesterday, this feature show you as text how far you are from the other coordinate.

This looks so:

within 1 kilometer: very close
More than 1...

 

I developed a simple example about how I think you should handle easily views and values of a CustomListView item.

3 things:

1) constants pointing to the views order in the item;
2) two custom...

 

This isn't really a tutorial but rather a recommendation for a diff tool. Sometimes you need to compare files, or even directories, and doing it manually is just too painful and difficult. I've...

 

When you register to FCM your app will receive a FCM token. Another app can send a message to this token. Probem here: How do I know the token of another device/user? Usually you have a server...

 

To deliver more engaging viewing experiences to their users, many Android OEMs are experimenting with new, super widescreen smartphones. Samsung has just announced a new flagship device, the...

 

It is simpler to parse XML with Xml2Map class: https://www.b4x.com/android/forum/threads/b4x-xml2map-simple-way-to-parse-xml-documents.74848/

The XmlSax library provides an XML Sax...

 

After making more than 58k posts in the forum, I decided that it is a good time to build a list of tips and common mistakes. 12 points, in no particular order:

1. Separate code from...

 

The attached example presents the user with a two-level hierarchical view of data and uses ULV to implement the following:

• Showing the hierarchy using indentation of sub-items
• Drag/Drop...

 

Remote Database Connector (RDC) is a middleware web server that allows you to easily connect your Android app to any type of remote database server.
Usually you will use it with a database...

 

(This is the first of a small series of code-based tutorials that I will post regarding OpenCV for B4A. I will try to focus mainly on how to use OpenCV in B4A, tips, best practices...

 

Dear,

I've read there are two "kinds" of SMS: normal text SMS and Data SMS: http://developer.android.com/refere...ager.html#sendDataMessage(java.lang.String...

 

While I'm new. I can not find a full and detailed example. How to make a beautiful effect for button when I click button. I like using a gradient fill please. I did not use in my work designer...

 

Basic4android v1.8 introduces a new tool named Manifest Editor.
Every Android application includes a file named AndroidManifest.xml.
This is an XML file that describes the application for the OS...

 

HttpUtils2 was replaced with OkHttpUtils2: https://www.b4x.com/android/forum/threads/okhttp-replaces-the-http-library.54723/
Both libraries are included in the IDE.


HttpUtils2 is a...

 

I am going to try and wrap this (CircularButton) from here
https://github.com/Alexrs95/Circula...alexrs/circularbutton/lib/CircularButton.java
Found it on the android-arsenal.com website...

 

I noticed this being asked a few times so I thought I'd share the version I've created.

This implementation requires that you have a server with PHP and MySQL. I am by no means a PHP or MySQL...