Android Question [B4XPages] CallSub of a Page from a Class

Mike1970 · Jun 21, 2021

Hi everyone, i'm using B4XPages on Android and i have this scenario:

I've a class that handles http requests (let's call A)
I've a B4XPage (let's call B)

When the app is opened/resumed, a method of the A class is called, when it finishes his work it must call a Sub that is located in B (if it is disaplayed obvs.), to update the UI.

Blueprint of the code:

B4X:

Sub A As ResumableSub
    ... Work
   
    If B4XPages.GetManager.GetTopPage.Id == "B" Then CallSub(B, "UpdateUI") '<---- CallSub does not work for B4XPage
End Sub

How can i achive this result?

thanks in advance

Erel · Jun 21, 2021

Your code should work assuming that B was set correctly.

It is however not needed.

B4X:

If B4XPages.GetManager.GetTopPage.Id == "B" Then 
B.UpdateUI
End If

Mike1970 · Jun 21, 2021

Erel said:
Your code should work assuming that B was set correctly.

It is however not needed.

B4X:

If B4XPages.GetManager.GetTopPage.Id == "B" Then B.UpdateUI End If

But with this code B should be declared in the Globals of A (and intilialized again?)

Erel · Jun 21, 2021

It is up to you. You can declare it wherever you like.

B4X:

Dim b As Page145 = B4XPages.GetPage("page 145 id")
b.UpdateUI

Mike1970 · Jun 21, 2021

Erel said:
It is up to you. You can declare it wherever you like.

B4X:

Dim b As Page145 = B4XPages.GetPage("page 145 id") b.UpdateUI

Oh ok, so i need to create another "Page" object and reference it to the already existing page, i thought it was reachable without. Thanks Erel

Android Question [B4XPages] CallSub of a Page from a Class

Mike1970

Well-Known Member

Erel

B4X founder

Mike1970

Well-Known Member

Erel

B4X founder

Mike1970

Well-Known Member

Similar Threads

Android Question [B4XPages] CallSub of a Page from a Class

Mike1970

Well-Known Member

Erel

B4X founder

Mike1970

Well-Known Member

Erel

B4X founder

Mike1970

Well-Known Member

Similar Threads

Privacy & Transparency

Privacy & Transparency