Android Question [SOLVED] [B4X] MainPage FirstTime

[makis_best]

Hello

With the Default method on Activity_Create we can check FirstTime run.
With B4XPages how we can check FirstTime?

Thank you.

 

[stari]

If FirstTime then

 

[makis_best]

If FirstTime then

I know about Default method I wander about B4XPages
if FirstTime then not working.

 

[Sabotto]

In B4XPages, the Create event is only triggered once, it's not like the Activities!

 

[DonManfred]

As B4XPages never gets destroyed FirstTime = false never happen

 

[makis_best]

So I need to find a trick to emulate FirstTime.

 

[LucaMs]

Maybe he might need a "first time appeared".
A private variable in the Class_Globals would be sufficient.

Sub Class_Globals
    Private mFirstTimeAppeared As Boolean = True


Private Sub B4XPage_Appear
   If mFirstTimeAppeared Then
   Else
   End If

   mFirstTimeAppeared = False
End Sub

 

[makis_best]

@LucaMs I try your idea using B4XPage_Appear and with B4XPage_Disappear but does not work.
keep running the code I want to run for once.

 

[LucaMs]

@LucaMs I try your idea using B4XPage_Appear and with B4XPage_Disappear but does not work.
keep running the code I want to run for once.

I hope you haven't changed the value of mFirstTimeAppeared in the B4XPage_Disappear.
It should work.

 

[LucaMs]

As you know FirstTime doesn't mean "first absolute time you run this app".

 

[makis_best]

Correct... I just find it out... My mistake.
Now Working fine.
I mess around B4XPage_Appear and B4XPage_Disappear.

Thank you all.

 

[Erel]

Why such complicated solution??????
You almost never need to handle the Appear / Disappear events.

Put the code in B4XPage_Created of B4XMainPage class. It runs once. Exactly like Activity_Create (FirstTime = True)

 

[giannimaione]

Put the code in B4XPage_Created of B4XMainPage class. It runs once. Exactly like Activity_Create (FirstTime = True)

the boss is always right !

 

[LucaMs]

Why such complicated solution??????
You almost never need to handle the Appear / Disappear events.

Put the code in B4XPage_Created of B4XMainPage class. It runs once. Exactly like Activity_Create (FirstTime = True)

the boss is always right !

Not this time ?

If you have to, like I have to, show something and work on something that includes resumable calls only once, I can't write this code in the Created routine, then I need "such a "complicated" solution" ?

 

[Erel]

If you have to, like I have to, show something and work on something that includes resumable calls only once, I can't write this code in the Created routine, then I need "such a "complicated" solution"

Why? Create a sub and call it from the created event.

 

[LucaMs]

Why? Create a sub and call it from the created event.

Because the code to be executed requires Root has already been displayed.

 

[Erel]

Call it at the end of the Created event. You can also start the sub with Sleep(0) if you want to allow the layout to appear.

 

[makis_best]

Why such complicated solution??????
You almost never need to handle the Appear / Disappear events.

Put the code in B4XPage_Created of B4XMainPage class. It runs once. Exactly like Activity_Create (FirstTime = True)

And how we check FirstTime = False?
B4XPage_Created load only once not every time page show.

 

[Erel]

B4XPage_Created load only once not every time page show.

And that is a very good thing.

If you do want to do something when the page appears then use that event.

In my experience, the Appear event, is used in many cases when developers try to imitate the complex activities behavior, and don't realize that you can directly access the page elements and do whatever you need immediately.

The Appear event can be useful to enable timers for example.

 

[makis_best]

Ok... In my case I load a layout first time the page created and I load a second one when I get back to the that page.
How else to do if not control B4XPage_Appear?