What is the `view as Button` means?

# android

[Ayden]

What is the view as Button means?

[vincent.desmet]

it casts the ‘view’ object to a Button, like (Button) view does in Java

[menegatti]

and if view cannot be cast to Button it will throw an exception

[Ayden]

Can I do it without using view as Button?
Instead, I just defined like val btnSelected = Button.

[menegatti]

it really depends on your code

[menegatti]

I assume this is a clickListener and you’re using the view passed as a parameter

[menegatti]

so you you have to cast

[Benoît]

If you know java, it's like doing Button b = (Button) yourView;

[Ayden]

Sorry, it might seem like a dumb question. I just want to understand what is the usage.

[menegatti]

no issues… the point is just that as X is the way to cast an object to another type

[Ayden]

That line of code is mean it passes the view to the button? Am I right?

[menegatti]

no

[menegatti]

it is a cast

[menegatti]

as means “from this point treat this object type as the type of the cast”

[menegatti]

val btnSelected = view as Button

val means that the field btnSelected is read-only
= causes btnSelected to be set to view
view as Button forces view to be treated as a Button instead of View

[Ayden]

Need some time to digest.

[Ayden]

Thank you so much @menegatti