Android Question [B4XPages] Is it possible to view the same Google Map at two pages?

vfafou · Sep 6, 2020

Hello!
I would like to ask if it's possible to view the same Google Map to two pages!
I mean I want to initialize one map instance, show it for example to the MainPage and when I show another page, the same map is appeared without reinitialisation needed!
Thank you in advance!

LucaMs · Sep 6, 2020

So you can move the WebView from one B4XPage to another one.

vfafou · Sep 6, 2020

LucaMs said:
View attachment 99671

So you can move the WebView from one B4XPage to another one.

Hello Luca!
Thank you for your response!
I have read the B4XPages benefits!
I'm talking about mapFragment view and I can't figure out how to move it to another Page! ?

Andrew (Digitwell) · Sep 6, 2020

How about putting the mapfragment on a panel and moving the panel.

Code:

mappnl.removeviewfromparent
newparent.addview(mappnl,x,y,w,h)

Erel · Sep 6, 2020

Andrew (Digitwell) said:
ow about putting the mapfragment on a panel and moving the panel.

Good solution.

vfafou · Sep 6, 2020

Thank you very much Andrew! It's done like any normal view!!!
It's my brain stuck...

LucaMs · Sep 6, 2020

vfafou said:
I'm talking about mapFragment view and I can't figure out how to move it to another Page!

vfafou said:
It's done like any normal view!!!

Indeed; I've never used mapFragment, which requires various things in the manifest, I think (and I'm starting to use B4XPages right now) and tried to move a WebView.

In the B4XMainPage I have:

B4X:

Sub btnPage2_Click
    Dim P2 As Page2
    P2.Initialize
    B4XPages.AddPageAndCreate("Page2", P2)
    WebView1.RemoveViewFromParent
    P2.PassView(WebView1)
    B4XPages.ShowPage("Page2")
End Sub

B4X:

' Page2

Public Sub PassView(Vw As B4XView)
    Root.AddView(Vw, Vw.Left, Vw.Top, Vw.Width, Vw.Height)
End Sub

and it works (I don't know if there is a better way to do it).

LucaMs · Sep 6, 2020

LucaMs said:
(I don't know if there is a better way to do it).

Surely it is better to:

1 - declare P2 in the Class_Globals of B4XMainPage, initialize and add it to B4XPages in B4XPage_Created instead of inside the btnPage2_Click event routine (if you press it more then once the app doesn't crash, you just get a log with a warning that the page is already added to B4XPages but doing so it is more correct);
2 - I was going to write that it would have been better to put the view addition in a Try-Catch block to avoid adding the same View multiple times to Page2 but... then I tried and no exception is raised in case the View exists already (in this case the log shows always 2)! Great!

B4X:

Public Sub PassView(Vw As B4XView)
'    Try
        Root.AddView(Vw, Vw.Left, Vw.Top, Vw.Width, Vw.Height)
'    Catch
'        Log(LastException)
'    End Try 'ignore
Log(Root.NumberOfViews)
End Sub

Android Question [B4XPages] Is it possible to view the same Google Map at two pages?

vfafou

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LucaMs

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vfafou

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Andrew (Digitwell)

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Erel

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vfafou

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LucaMs

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