Book Image

How to Build Android Apps with Kotlin - Second Edition

By : Alex Forrester, Eran Boudjnah, Alexandru Dumbravan, Jomar Tigcal
4 (2)
Book Image

How to Build Android Apps with Kotlin - Second Edition

4 (2)
By: Alex Forrester, Eran Boudjnah, Alexandru Dumbravan, Jomar Tigcal

Overview of this book

Looking to kick-start your app development journey with Android 13, but don’t know where to start? How to Build Android Apps with Kotlin is a comprehensive guide that will help jump-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 with 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. You'll also get to grips with testing, learning how to keep your architecture clean, understanding how to persist data, and gaining 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 (24 chapters)
1
Part 1: Android Foundation
6
Part 2: Displaying Network Calls
12
Part 3: Testing and Code Structure
17
Part 4: Polishing and Publishing an App

Files

We’ve discussed Room, SharedPreferences, and DataStore and specified how the data they store is written to files. You may ask yourself, where are these files stored? These particular files are stored in internal storage. Internal storage is a dedicated space for every app that other apps are unable to access (unless a device is rooted). There is no limit to the amount of storage your app can use.

However, users have the ability to delete their app’s files from the Settings menu. Internal storage occupies a smaller part of the total available space, which means that you should be careful when it comes to storing files there. There is also external storage. The files your app stores in external storage are accessible to other apps and the files from other apps are accessible to your one.

Note

In Android Studio, you can use the Device File Explorer tool to navigate through the files on a device or emulator. Internal storage is located in /data/data/{packageName...