Tutorials & Examples

Small update: I use Download2 instead of Poststring now. It handles some things for us like removing illegal space, etc. Otherwise some examples wont work as decribed.


Part 1...

 

I often use Sqlite for my apps and I came across "DB Browser". It's a free tool to browse and edit SQlite databases and tables. Download it from here: http://sqlitebrowser.org/ For B4J apps...

 

I've just wasted an hour trying to understand why a desktop program that I'm using for many months failed to upload a file to a FTP server.
I realized that the only thing that was recently changed...

 

Old and irrelevant tutorial. Follow this one instead: [B4X] Net library (FTP, SMTP, POP) with Wait For

This tutorial covers the FTP object which is part of the Net library.
The Net...

 

Now and then there are JavaObject code snippets posted in the forum. Usually there are permissions required listed together with the code, but not always. Which could be because none are needed...

 

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...

 

It is recommended to use TabStripViewPager for new projects: https://www.b4x.com/android/forum/threads/63975/#content


The TabHost view is a very important view. It allows you to add...

 

Using the phone accelerometer it is possible to handle shake events.
The problem is of course to decide if the stream of values represents a shake.

The Shake code module finds shake patterns and...

 

Of course there is more about to secure data transmissions between clients & servers. Please take this tutorial to think about to secure your communication as good as you can.


With...

 

Old tutorial. Don't use services. Use receivers.
Broadcast receivers are program components that can handle broadcasted messages. These messages usually notify about a system event.

There...

 

Edit: Google AdMob does support rewarded ads without mediation.
You can use this unit id to test it: rewardAd.LoadAd("ca-app-pub-3940256099942544/5224354917")
Make sure to use FirebaseAdMob...

 

In this thread, I am publishing a series of 3 videos to show you how you can wrap Kotlin code and libraries to be used within your B4A-projects.

In order to really appreciate the content, you...

 

Start with this tutorial if you are not familiar with custom views: [B4X] Custom Views with Enhanced Designer Support

With the help of XUI it is quite simple to create custom views classes...

 

This tutorial is about db modelling with a small example. Of course this is just an overwiew and there is much more. I assume you know how to create tables and Co.

Databases

A db is a...

 

Saw a request for this so I thought I'd share. Below you will find a way of converting an integer to a DIP (Density Independent Pixel). This may be useful in situations where you have a variable...

 

This code is an example of creating an expandable listview using a scrollview.
The layout of each item in the list is created in code and is customizable on a per item basis.
The example is...

 

SQLite Viewer is an open source application that allows you to view the contents of SQLite databases right from your Android device...

 

Remember that that a call to Sleep or Wait For in a resumable sub causes the code flow to return to the parent.

Example:

Sub Button1_Click
Sum(1, 2)
Log("after sum")
End Sub

Sub Sum(a...

 

Edit: A better kiosk implementation is available: https://www.b4x.com/android/forum/threads/device-owner-tasklock-kiosk-apps-2017.81765/#post-518018

Kiosk mode applications are...

 

Hello,

I was facing a problem to use B4A bridge because I'm connected to a LAN without WIFI.
I found a solution to make my computer a WIFI spot and then use B4A bridge & B4A designer Wireless...