Difference between KOTLIN class and KOTLIN file in...

# android

[Umar Ata]

Difference between KOTLIN class and KOTLIN file in android studio ?

[Vampire]

You mean in the "New" dialog?

[Vampire]

The first one adds class Foo { } as content, the second one not, if you for example only want to put extension function and properties in

[Umar Ata]

Actually I used both in two different files
And now the class icon is same like other KOTLIN classes but the file icon is different even I have a class inside it with file name

[Vampire]

Not sure what you mean, can you show a screenshot with annotations?

[Umar Ata]

PXL_20210225_095121358.MP.jpg

[Umar Ata]

ChangePhoneValidateFrag is class
CommentsFragment is file
But both have classes with file name declared inside then how they look different

[Vampire]

The second has something additional, for example extension functions or extension properties

[Vampire]

Or another class

[Umar Ata]

As I said in CommentsFragment a class named CommentsFragment is declared and nothing special just a fragment implementation

[Vampire]

Are you sure there are not other classes, top-level functions, top-level properties, extension functions, extension properties, ...?

[Umar Ata]

You can reproduce this
Simply use New dialog and select new kotlin file then declare a class of file name in it so it will look different

[Vampire]

No, works fine here.
Granted I use IntelliJ, not AS, but AS is basically a customized IJ.

[John Oberhauser]

are you sure the spelling is the same between the file name and class name?

[Umar Ata]

@Vampire after deleting these two variables the class icon changed to expected icon,

private const val ARG_PARAM1 = "param1"
private const val ARG_PARAM2 = "param2"

I see these two variables are declared outside of class declaration and may be this change is reflected in file icon

[Vampire]

Of course, "correct icon" is not right, "expected icon" probably is.
It indeed is correct, that the file-like icon is shown if there is more than the class, like a second class as I showed or some other top-level declarations like properties, constants or functions.
The class-like icon is only shown if the file only contains one class and that class is named ike the file.