Book Image

How to Build Android Apps with Kotlin

By : Alex Forrester, Eran Boudjnah, Alexandru Dumbravan, Jomar Tigcal
Book Image

How to Build Android Apps with Kotlin

By: Alex Forrester, Eran Boudjnah, Alexandru Dumbravan, Jomar Tigcal

Overview of this book

Are you keen to get started building Android 11 apps, but don’t know where to start? How to Build Android Apps with Kotlin is a comprehensive guide that will help kick-start your Android development practice. This book starts with the fundamentals of app development, enabling you to utilize Android Studio and Kotlin to get started building Android projects. You'll learn how to create apps and run them on virtual devices through guided exercises. Progressing through the chapters, you'll delve into Android’s RecyclerView to make the most of lists, images, and maps, and see how to fetch data from a web service. Moving ahead, you'll get to grips with testing, learn how to keep your architecture clean, understand how to persist data, and gain basic knowledge of the dependency injection pattern. Finally, you'll see how to publish your apps on the Google Play store. You'll work on realistic projects that are split up into bitesize exercises and activities, allowing you to challenge yourself in an enjoyable and attainable way. You'll build apps to create quizzes, read news articles, check weather reports, store recipes, retrieve movie information, and remind you where you parked your car. By the end of this book, you'll have the skills and confidence to build your own creative Android applications using Kotlin.
Table of Contents (17 chapters)
Preface
12
12. Dependency Injection with Dagger and Koin

Introduction

In the previous chapter, we learned how to request permissions from the user and use Google's Maps API. With that knowledge, we obtained the user's location and allowed them to deploy an agent on a local map. In this chapter, we will learn how to track a long-running process and report its progress to the user.

We will build an example app where we will assume that Secret Cat Agents (SCAs) get deployed in a record time of 15 seconds. That way, we'll avoid having to wait for very long before our background task completes. When a cat successfully deploys, we will notify the user and let them launch the app, presenting them with a successful deployment message.

Ongoing background tasks are quite common in the mobile world. Background tasks run even when an application is not active. Examples of long-running background tasks include the downloading of files, resource cleanup jobs, playing music, and tracking the user's location. Historically, Google...