What is the use of flags in Parcelable?

Question

I have been writing Parcelables to Parcel without any focus on flags field, which is a parameter in the method signature and it has worked fine but I h

Answer 1

You can only provide flag zero or one.

You have a void method, so you're not returning a Parcelable from a function nor do you have a parameter that's Parcelable, as the documentation says, therefore the flag should be zero.