Tutorials & Examples

This is for advanced users only. Please see Erel's important cautions about using this approach below.

This post and examples demonstrate how to extend B4XPages to allow orientation...

 

Hello,

UPDATE

This version includes Multiline Support and Guaranteed functionality. The last version had a lot of bugs, that new example is more mature.

At the moment, I'm...

 

It incorporates this Github project via inline java code. The project reports a whole lot of information about your device and write the results to the B4A log:

** Activity (main)...

 

I share this little code to handle translation within the app

regards

 

If you are lazy creating views "by hand" or you simply want a "form" depending on a MySql table take a look at this small app.

Type in the Database and Table Name and the IP-Address of the server...

 

I hope I have got this example right. Any positive criticism or improvements will be welcome!
I have made this to try learn and understand how this all works. This could also help others to...

 

This Tutorial will show you all needed Code to do Uploads to Dropbox.

Requirement for this tutorial: you need to have your App Dropbox-ready (see Tutorial I - Authentification).

Asuming...

 

This Tutorial belongs to the Dropbox SDK V2 - Java Library

See this thread for preparing your app to use this Library.
Especially the Manifest-Entry...

 

Related Libraries:
B4A Dropbox SDK V2
B4J Dropbox SDK V2

You need to know/remember the dropboxId of the account you are actually using/requesting. And the latest cursor.
Use...

 

Attached you find a small test program that shows a known problem in Android when drawing lines with a small slope and with a StrokeWidth of 1.

In some cases the entire line or parts of it are...

 

The following code draws a "selection" window when you move the finger:

Sub Globals
    Dim Canvas1 As Canvas
    Dim Rect1 As Rect
    Dim sx, sy As Int
End Sub

Sub Activity_Create(FirstTime...

 

Here i'll post one or two examples showing how to use the DownloadManager library.

DownloadManager simple example.
Here's what must be the most simple way to use DownloadManager...

 

It is recommended to use HttpUtils2 instead of this code module. HttpUtils2 is more powerful and is easier to work with.

As discussed in the Services tutorial, some tasks are...

 

Using the feature of resident images of Datecs dpp250. This is the way I found with Erel help to convert a 1 Bit BMP to ESC format, download to the printer, clean printer memory, write printer...

 

Old and irrelevant tutorial. Many better examples, including this one: https://www.b4x.com/android/forum/threads/b4x-bitmapsasync.119589/


This example demonstrates an efficient way...

 

Better to use: https://www.b4x.com/android/forum/threads/simple-progress-http-download.127214/#post-796463

The attached project includes a slightly modified version of HttpUtils2 and...

 

Hi. here is my code. it's a double joystick to can control things trough bluetooth. I made some things in Arduino:


https://github.com/xakko/camioncito

With BT with...

 

Very kind of JonPM to provide us with this, there are nearly always helpful people on this live chat who can help you with your problems instantly!

B4A Chat

 

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...

 

After reading so many threads from new 'member' s , I feel that we have to make humble request to all new members :

Do not start a B4A project before you read the guides....