I'm learning Android in Java now is it old so I have to go for kotlin or flutter and start from the beginning again or continue?

Answer 1

Actually not, however Kotlin is now the official language for Android but it doesn't mean that you have to switch on it and leave Java completely. Both languages are alternative of each other, if you want to do cross platform, then you can prefer Flutter.
Thank you

Answer 2

This answer depends on ur app type. If u want to make an app which is aiming in system I.e settings, os.. or complicated you should use kotlin else if it is simple app working in cross platform choose flutter