Have a class that implements Java interface and have it as method return type while calling android ...

# android

[MJegorovas]

Have a class that implements Java interface and have it as method return type while calling android api, but getting error Type mismatch. Required: AppKey Found: PublicKey! . Any clues?

[MJegorovas]

Code

Untitled.kt

[MJegorovas]

@kenkyee Any reason why you think this is not Kotlin?

[Chrimaeon]

``Appkey`` extends Key and not PublicKey

[Chrimaeon]

And it’s not kotlin but kotlin colored because you would have the same issue in Java

[MJegorovas]

Sorry, should've been clearer - Key is from java.security so PublicKey does extend Key

[kenkyee]

Still also happens in Java

[Chrimaeon]

Yes, but you do not extend PublicKey so the return types do not match.

[MJegorovas]

Huh, did not know that, but changing AppKey to extend PublicKey still requires to cast the return to AppKey. Interesting, thanks for the help!