Building a Crypto Tracker with Kotlin in Android (Part 1)

What Will I Learn?

• You will learn how to setup a Kotlin Android app for ReactiveX and Dagger
• You will learn how to implement the Parcelize feature in Kotlin
• You will learn how to use extension functions to cut back boilerplate in an Android Kotlin application.

Requirements

• Android Studio 3.0 or Android Studio Canary
• A basic understanding of the Android ecosystem
• A fair understanding of Kotlin or the Java programming language

Difficulty

• Intermediate

Description

In this first video tutorial, we setup our android application through various means. We build out our main data model and add the Kotlin Parcelize feature to it so that we can Marshall and Unmarshall the data back and forth from JSON to a POJO. The main advantage of Parcelize over other methods of serialization being the performance and the lack of boilerplate. We then go about adding Extension functions to our application to allow us to reduce boilerplate and handle various things that will become important in the later parts of our application. This includes extending ReactiveX, RxJava and RxAndroid and making it easier for us to deal with Disposables and Disposable Subscribers. We also add a few small Flowable extension functions. Finally, we implement our network functionality so that we can easily read the API. We also add functionality to make it so that the application does not as much consume bandwidth when the user's phone is not on Wifi.

The source code for this project can be found here

Video Tutorial

Related Content

• Android Applications in Kotlin

• Building a Web View with Kotlin and Android
• Building a Reactive Functional Todo Application with Kotlin in Android (Part 1)
• Building a Reactive Functional Todo Application with Kotlin in Android (Part 2)

• Desktop Applications in Kotlin

• Building a Calculator with Kotlin (TornadoFX, FXML, Desktop Application)
• Building an API with Kotlin and Ktor

• Intro to Kotlin Series

• Intro to Kotlin (Basic Types, Type Inference, Casting and Strings)
• Intro to Kotlin (Basic Operations and Collections)
• Intro to Kotlin (Control Flow and Conditionals)
• Intro to Kotlin (Functions in Kotlin)
• Intro to Kotlin (Advanced Functions)
• Intro to Kotlin (Classes, Visibility Modifiers, Objects)
• Intro to Kotlin (Nullables, Data Classes, Enum Classes and Sealed Classes)
• Intro to Kotlin (Interfaces, Inheritance, Type Alias and Abstract Classes)

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Posted on Utopian.io - Rewarding Open Source Contributors

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