Android Question Subs that run without being called.

[Steve-h]

I understand in a rather foggy way that B4A is event driven. So when a timer ticks or a button is pressed or some other event happens some code is written to respond to the event. However in each project there are a number of subs which I can see by placing a log(“message”) in them are run without apparently being called . Some examples would be :-

Class_Globals,
Initialize,
B4XPage_Created

I understand the purpose of these subs, I just can't see how they are called.

Is there a list of functions which are automatically called or am I missing something. Sorry for being so dim it is probably obvious to everybody else. I am not comfortable with code unless I understand what is happening.

 

[LucaMs]

They are event routines run by libraries; in particular by the Core library, the heart of the development tool.

 

[Erel]

Class_Globals and Initialize subs are not event subs.

B4XPage_Created is an event sub. It is called using the CallSub keyword from B4XPages code.
There are several ways to see the available events: https://www.b4x.com/android/forum/t...re-available-for-an-object.134150/post-848544
B4XPages events are listed here: https://www.b4x.com/android/forum/t...or-managing-multiple-pages.118901/post-744867

 

[klaus]

You might have a look at chapter 4 Program flow / Process life cycle in the B4X Basic language booklet.
It explains the program flow for all B4X platforms.