Android Question ClosePage doesn't work

JesseW · Oct 11, 2021

Erel says: Call B4XPages.ClosePage(Me) instead of Activity.Finish.

this doesn't work. to demonstrate, I opened a brand new b4xpages project from b4a 11.0 and changed the button click event from

B4X:

Private Sub Button1_Click
    xui.MsgboxAsync("Hello world!", "B4X")
End Sub

to

B4X:

Private Sub Button1_Click
    wait for (xui.MsgboxAsync("Hello world!", "B4X")) complete (o As Object)
    B4XPages.ClosePage(Me)
End Sub

and when you touch the button, the dialog disappears and goes back to the mainpage with the button. nothing closes.

I've been trying to find a way to close a b4xpages app so it can be restarted by the user to reload all the data from scratch. A more elegant solution would be to restart a page, but as far as I can tell, only an activity can be restarted, and I can't see how to do that from within a b4xpage. thanks in advance!

angel_ · Oct 11, 2021

It works for me, upload an example

JesseW · Oct 11, 2021

angel_ said:
It works for me, upload an example

an example isn't really needed because only a single line was changed, and one line added. but here ya go. thx

angel_ · Oct 11, 2021

Try this:

B4X:

Private Sub Button1_Click
    xui.Msgbox2Async("Close?", "", "Yes", "", "No", Null)
    Wait For Msgbox_Result (Result As Int)
    If Result = xui.DialogResponse_Positive Then
        B4XPages.ClosePage(Me)
    End If
End Sub

JesseW · Oct 11, 2021

that works, thank you! I am at awe over the power b4x has, but I can find very little information on how to use the Wait For command. I searched for almost an hour before I ran across Erel's b4j thread explaining resumable subs, and all I could get from it is an event name was to follow the Wait For statement. @angel_ , How did you know to use MsgBox_Result after your Wait For? what am I missing???

JesseW · Oct 11, 2021

I just figured out that you can write it like this as well...

B4X:

Private Sub Button1_Click
    Wait For (xui.Msgbox2Async("Close?", "", "Yes", "", "No", Null)) Msgbox_Result(Result As Int)
    If Result = xui.DialogResponse_Positive Then
        B4XPages.ClosePage(Me)
    End If
End Sub

encapsulating the asynchronous call in parenthesis followed by the event name with its return parameters. The return parameters are optional, by the way, if you don't need to know which button was pressed.

klaus · Oct 11, 2021

JesseW said:
I searched for almost an hour before I ran across Erel's b4j thread explaining resumable subs

Did you have a look at chapter 5.7 Resumable Subs in the B4X Basic Language booklet ?

JesseW · Oct 11, 2021

klaus said:
Did you have a look at chapter 5.7 Resumable Subs in the B4X Basic Language booklet ?

sorry, I didn't know to look there. I was looking for Wait For. I'll definitely have a look. It sounds very intriguing. thanks klaus!!!

Android Question ClosePage doesn't work

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