android.util.Base64 encode/decode flags parameter

For kotlin you can use

val flag = Base64.URL_SAFE or Base64.NO_WRAP

int flags passed to functions are usually defined to be bitwise ORed to achieve a combined effect.

You can usually tell by looking at the constant values, they would go 0 1 2 4 8 16 ..

As for your question you can use the following for your flag definition:

int flags = Base64.NO_WRAP | Base64.URL_SAFE;