Android Question Sender is null

I

inakigarm

Well-Known Member

Licensed User

Longtime User

• Oct 13, 2016

• #2

The Checkbox event is not Click, is CheckedChange:

B4X:

Sub CheckBox1_CheckedChange(Checked As Boolean)
 
End Sub

 

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Rusty

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Longtime User

• Oct 13, 2016

• #3

my mistake, in my post, i typed it instead of copying it from code.
My code has chkbx_checkedChange(checked as boolean)
and Sender is NULL when the checkedchange event fires...don't understand why...


I took out all breakpoints and the Sender NULL issue disappeared...argh!
Thanks for the help

 

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I

inakigarm

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Licensed User

Longtime User

• Oct 13, 2016

• #4

Works here (adding the checkbox at Designer - layout):

B4X:

Sub CheckBox1_CheckedChange(Checked As Boolean)
    Dim x As CheckBox
    x=Sender
    Log(x.Tag)
End Sub

Have you added the checkbox by code?

 

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klaus

Expert

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Longtime User

• Oct 13, 2016

• #5

Are you adding only one or more Checkboxes?
If you add more than one you must Dim and Initialize each Checkbox!
It would have been easier to help if you had posted the whole code that adds the Checkboxes.

 

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Rusty

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Longtime User

• Oct 13, 2016

• #6

Thanks all,
in my post #3, i edited it and indicated that the NULL issue was due to having a debug breakpoint.
Once removed, the NULL issue of Sender went away.
I appreciate the responses

And yes, I create many checkboxes in code and I do dimension each one...I got caught on that one several years ago (thanks)
Rusty

 

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