Book Image

Kotlin Programming By Example

By : Iyanu Adelekan
Book Image

Kotlin Programming By Example

By: Iyanu Adelekan

Overview of this book

Kotlin greatly reduces the verbosity of source code. With Google having announced their support for Kotlin as a first-class language for writing Android apps, now's the time learn how to create apps from scratch with Kotlin Kotlin Programming By Example takes you through the building blocks of Kotlin, such as functions and classes. You’ll explore various features of Kotlin by building three applications of varying complexity. For a quick start to Android development, we look at building a classic game, Tetris, and elaborate on object-oriented programming in Kotlin. Our next application will be a messenger app, a level up in terms of complexity. Before moving onto the third app, we take a look at data persistent methods, helping us learn about the storage and retrieval of useful applications. Our final app is a place reviewer: a web application that will make use of the Google Maps API and Place Picker. By the end of this book, you will have gained experience of of creating and deploying Android applications using Kotlin.
Table of Contents (12 chapters)

Introduction to Model-View-Presenter (MVP)

Over the course of developing the Tetris application, we attempted to add structure across our code base by separating out program files into different packages based on the tasks they performed. We tried to abstract application logic into the AppModel class, and user interactions related to gameplay to be handled by the TetrisView view class. This certainly brought some order into our code base in contrast with, say, putting all logic into one big class file.

Needless to say, there are better ways to separate concerns within an Android application. One way is the MVP pattern.

What is MVP?

MVP is a common pattern in Android that is derived from the Model-View-Controller (MVC) pattern...