This project demonstrates how to use Kotlin to enable strict/statically typed extras/arguments
for your Activities, Services, and Fragments. To start an Activity using this pattern
you simply call context.startActivityWith(MyActivity.Extras("param1", param2)).
On the Activity side, these extras are available via extension functions, i.e.
activity.extras().param2.
This is all achieved with a few interfaces and some reified generics. In order to support this API,
simply create a data class that implements the ActivityExtras interface:
@Parcelize
data class Extras(val param1: String, val param2: Int) : ActivityExtras<MyActivty>
Activities and Fragments may optionally implement StrictActivityExtras or
StrictFragmentArguments but this really only allows you to avoid a cast when calling extras().
Check the app module for example usages. The strictextras module contains a library with
the APIs. Library availability via Maven forthcoming.