Android Question defining Variables

Erel

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• Jan 21, 2018

• #2

B4X:

Label1.Text = Label2.Text

Mark.S said:

getting an " should first be initialized err"

Click to expand...

Have you added the views with the designer? Have you loaded the layout file?

 

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Mark.S

Member

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• Jan 21, 2018

• #3

Hi Erel,
I'm not using the designer at all.
Dimmed an array of 20 labels in Sub_Globals.
Assigned all their property's and initialized them in a sub
their .text values are being re-assigned in their _click subroutine
it's when I try to read/write their .text in a third sub the err accrues
it appears that this sub has no knowledge of the view

btw Erel thanks for thanks for helping!!

 

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Erel

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• Jan 21, 2018

• #4

Can you upload the project (File - Export as zip)?

 

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Mark.S

Member

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• Jan 21, 2018

• #5

Erel,

it will be a bespoke program for analyzing fruit machine performance.
and cash collection data. designed to work on a 7" pad only.

its my first ever program

 

Attachments

• Meter Capture.zip

  51.4 KB · Views: 209

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LucaMs

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• Jan 21, 2018

• #6

B4X:

            If SelectedPanel = 2 Then ' Copy value of selected meter to keyboard result box

'ERROR *******
            Log(lbl.Tag)

lbl.Tag value is 14, and...

B4X:

'Create Meter Inputs labels
    Cd.Initialize2 (Colors.ARGB (255,255,255,255),0,2, Colors.Black)
    For X =0 To 13  <-------
        lblMRinput(X).Initialize("MeterInput")

 

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Mark.S

Member

Licensed User

• Jan 21, 2018

• #7

Thanks LucaMs,
So obvious!
lesson one. DON'T use public variables unless you have to!
I'm very grateful to all you experts out there, this community is very supportive.

 

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NJDude

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• Jan 21, 2018

• #8

I don't understand why you're not using the designer, but, if you insist on doing everything by code then remove line 42:

B4X:

 Activity.LoadLayout("Main")

Also, you mentioned that your app it's designed for 7 inch tablets, well, this is how it looks on one of mine - Screenshot

Using the designer is the way to go.

 

Last edited: Jan 21, 2018

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clydebamford

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• Jan 28, 2018

• #9

So how do you define an array of views in the designer?

 

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M

Mahares

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• Jan 28, 2018

• #10

clydebamford said:

So how do you define an array of views in the designer?

Click to expand...

here is an example:

B4X:

'BELOW 2 LINES IN GLOBALS
Dim C1pr, Chem1pr, C2pr, Chem2pr, C3pr, Chem3pr, C4pr, Chem4pr, C5pr, Chem5pr As Label 
Dim CChem() As Label

'Then after you load the layout in Activity_Create with these views, you enter this line:
CChem = Array As Label(C1pr, Chem1pr, C2pr, Chem2pr, C3pr, Chem3pr, C4pr, Chem4pr, C5pr, Chem5pr)

 

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clydebamford

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• Jan 29, 2018

• #11

ok, but just not practical if you have say 20 or 30 or more views that you can define and implement with a few lines in a loop. i use the designer but often find that i end up altering their properties in code to the point where it might have been easier not to bother? i always start with the designer but with a complex project the end product bears no resemblance to the the layout, but that's just me!

 

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