Kotlin

How to Create a GraphQL API in Kotlin

February 23, 2018 by Annyce Davis 2 Comments

There are several freely available datasets online. One platform I came across was Kaggle. It supports analytics competitions based on user-mined datasets. After a bit of digging, I uncovered a CSV file of user reported UFO Sightings. This turned out to be interesting data. For instance, which countries had the most reported UFO sightings? Is there a particular day of the week where sightings occur the most? I had so many questions! My first step however, was to expose the data as a GraphQL API.Continue Reading

[NEW COURSE]: “Intermediate Kotlin for Android Developers”

February 21, 2018 by Annyce Davis Leave a Comment

My second course with LinkedIn Learning is now available, "Intermediate Kotlin for Android Developers"! As an avid fan of the Kotlin programming language, I had lots of fun putting this course together. I hope you enjoy watching and learning!

Course Description:

Kotlin is now officially supported by Google as an Android development language. If you're an Intermediate Developer interested in learning more about Kotlin, this course can help you get acquainted with this concise, fun language by learning about its efficiencies and power in Android development! The course starts with a general overview of what Kotlin has to offer, and how to leverage the Kotlin Android Extensions plugin. It also explains how to work with Anko, and provides an overview of some of the library's main artifacts: commons, layouts, and coroutines. To wrap up, the course covers how to work with collections.

Topics Included:

What Kotlin has to Offer
Working with Lambdas
Common Android Extension functions
Kotlin Android Extensions overview
Making use of the Anko library
Working with Coroutines
Nullability and Collections

For more great video content, check out my course page!

@JvmSuppressWildcards My Biggest Annoyance with Kotlin

August 29, 2017 by Annyce Davis 6 Comments

Over the past few months my team has been steadily moving our code over to Kotlin. It's been a joy to get to work with such a succinct, yet expressive language. However, I have spent needless hours attempting to debug issues in my application that were all solved with the addition of this one thing: @JvmSuppressWildcards.

Using RxBinding with Kotlin and RxJava2

July 23, 2017 by Annyce Davis 7 Comments

RxBinding provides RxJava binding APIs for Android User Interface (UI) widgets. This allows us to easily translate Android UI events into Observable streams. Let's look at a simple example of this: we're going to consider how to execute an asynchronous network request from a Button click event.