Kotlin

The interfaces in Kotlin will allow you to reuse more code than what you can get with Java. The reason is very simple: you can add code to your interfaces. If you've tried Java 8, it's something pretty similar. The good thing about being able to include code in an...

Truth to be told: writing databases in Android is quite boring. All the boilerplate required to work with SQLite is far from being the most delightful thing in the world. Fortunately, there are already enough libraries that simplify this task, one of them announced...

Creating alerts and dialogs on Android is a relatively simple task thanks to the builder, but due to the verbosity of the language it usually becomes something quite illegible. In Kotlin, by the mere fact of the lambdas, it simplifies us a little to understand what is...

One of the most common issues for Kotlin, as we talked about in a previous article, is that all classes and functions are closed by default. This means that if you want to mock a class (something that may be quite common in Java testing), you need to either open it...

Of course, Kotlin also allows us to do unit tests in a very simple way, and very similar to what we're used in Java. There are some small complications when we use libraries like Mockito, but we'll see some tricks to make it easier. Unit tests in Kotlin Although the...

This is just one more example about how in Kotlin we can continue to use the same libraries we've always used in Java for Android. Retrofit is a library that greatly simplifies doing requests to an API, and in this case I'm going to teach you how to integrate it with...

Virtually everyone who wants to create code on Android in a decoupled and easy-to-test way, resorts to Dagger sooner or later. Although there is something that works a bit differently when setting up Dagger in Kotlin, most of it is quite simple, and in a few steps I'm...

It had taken me too long to write an article to one of the most important parts of Kotlin: the treatment of nullity. Tony Hoare, the creator of the idea of nulls, calls itself "the billion dollar mistake". Nulls are one of the most error-prone points you get when you...

Although I spoke a little about it in another article, I'd like to explain in depth how lambdas work in Kotlin, and how they transform the interfaces with a single method in lambdas when we  are working with Java libraries. In particular I'm going to show you some...