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kotlinlang

Screen Shot 2019-09-16 at 1.35.40 PM.png

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

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 &lt;*&gt; is not equivalent to &lt;String&gt;

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

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

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

Well, ignoring the cast might not be the best solution

Also, your check: `is ArrayList&lt;*&gt;` does not assure you you have an `ArrayList&lt;String&gt;`

I’d update the check :slightly_smiling_face:

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

I’d then add a check before casting it to `ArrayList&lt;String&gt;`

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

Yes, I forgot that you cannot do that :disappointed: Sorry

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

You could introduce nullability for safety :slightly_smiling_face:

`as? ArrayList&lt;String&gt;?` that would return `null` if the cast fails

thanks <@UME49LBNG>, its still warning and suggest to `Array&lt;*&gt;` with `as?`

&gt; 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