Good morning, everybody, I got warning like this. Why android studio show this warning on these code...

# android

[Sam]

Good morning, everybody,
I got warning like this. Why android studio show this warning on these codes? and how to resolve this problem ?
Thanks.

[Tsvetozar Bonev]

Press alt+enter and it will suggest an annotation on the line, method, class or file that will ignore the warning. The warning shows up because <*> is not equivalent to <String>

[Sam]

But I hate to add more annotation, its really messy . Anything else suggestion to remove this warning?

[Tsvetozar Bonev]

One annotation on the file level will ignore every warning of this type, it isn't that messy

[Tsvetozar Bonev]

The warning itself is just a warning, you can ignore it

[Sam]

Thanks @Tsvetozar Bonev

[Luca Nicoletti]

Well, ignoring the cast might not be the best solution

[Luca Nicoletti]

Also, your check: is ArrayList<*> does not assure you you have an ArrayList<String>

[Luca Nicoletti]

I’d update the check 🙂

[Sam]

Yes, I have a lot of models which different types, so I must use Any for flexible to cast Type of data in RecyclerView.

[Luca Nicoletti]

I’d then add a check before casting it to ArrayList<String>

[Sam]

Screen Shot 2019-09-16 at 3.04.30 PM.png

[Sam]

You mean this things???

[Luca Nicoletti]

Yes, I forgot that you cannot do that 😞 Sorry

[Luca Nicoletti]

FYI: https://stackoverflow.com/questions/13154463/how-can-i-check-for-generic-type-in-kotlin here’s why

[Luca Nicoletti]

You could introduce nullability for safety 🙂

[Luca Nicoletti]

as? ArrayList<String>? that would return null if the cast fails

[Sam]

thanks @Luca Nicoletti, its still warning and suggest to Array<*> with as?

[Luca Nicoletti]

I was talking about the second cast

[Luca Nicoletti]

Inside the if 🙂

[starke]

Yes, I have a lot of models which different types, so I must use Any for flexible to cast Type of data in RecyclerView.

there are other ways of representing your data where you don’t have to deal with a list of Any

using something like https://github.com/lisawray/groupie can do a lot of the heavy lifting there for you too