If you’re using Moshi for your JSON needs, you’ll eventually stumble upon the need to specify the concrete implementation of an interface. For example, you might have a contrived example such as: So how do we make sure the list of mammals in MammalList uses the concrete Human implementation? With a custom adapter! The implementation is simple – we just …
If you’re using kotlin-guice to use Guice with your Kotlin project, you might have run into problems with binding annotations. Annotations let you use a specific implementation of an interface when there are multiple implementations registered with Guice: The problem is Kotlin works slightly differently when it comes to annotations and figuring out how to make it work can be …
Earlier we created a generic adapter that supported concrete collection types in Moshi. However, sometimes the type of the item within the collection isn’t available. We’ll need to create another adapter but there is a problem – Java type erasure. Even though we might know the type ahead of time in the code, by the time we get to runtime …
If you’ve used Moshi for any length of time, you’ve probably come across an error like: Platform class java.util.ArrayList (with no annotations) requires explicit JsonAdapter to be registered This means Moshi can’t serialise or deserialise the collection because it’s not just a basic ‘List’. The error message tells you to create a custom JsonAdapter but the documentation doesn’t really tell …