One-liner Intent/Bundle extras extractor in Kotlin!
One day I stumbled upon a custom Delegate that would get an extra using an inner Args class. I immediately found the feature useful yet it uses some boilerplate code. And for each Activity.
So I wrote simple extensions that would get the extra by lazy:
Pretty easy in fact. Here it is for Fragment:
extra would get the extra at runtime when accessing the data. extraNotNull would do the same, but would crash at runtime if the value was null.
To learn more about reified, go read https://proandroiddev.com/how-reified-type-makes-kotlin-so-much-better-7ae539ed0304 ;)
If you wish to enforce required extras as NotNull, I would recommend checking for those in onCreate using a simple requireNotNulls(vararg) extension (since the extras are actually lazy, you do need to be explicit):
This way, the Activity would crash if the required extras were not given. If that’s what you want.
This is a very tiny article and tiny bits of code. But it helped me a lot for my developments. Feel free to review, comment and improve ;)
