ofir-bar / BitfinexClient

Android app showing details of the BTC/USD currency pair, at real-time

BitfinexClient

An android app that showing the details of the BTC/USD currency pair, at real-time:

• a summary (current price, price change, volume, low, high) - ticker
• a table with the order book

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MVVM pattern with Clean architecture (as much as possible) developed with Kotlin.

Clean architecture consists of three layers:

• Data, which includes databases, clients, repositories, network
• Domain, which includes entities, usecases, and interactors
• Presentation, which includes UI related components, such as ViewModels, Presenters, Layouts, Fragments, Activities

Each layer has its own entities/models which are specific to that package. Mapper is used for conversion of one layer to another.

Sources: 1, 2, 3

Android Jetpack Components used:

• Fragment
• ViewModel
• LiveData
• Data Binding
• ActivityScenario, for instrumentation test (part of AndroidX Test)

Libraries:

• Koin, an easy-to-use DI framework. Nice comparison with Dagger

• RxKotlin / RxAndroid, RxJava bindings for Kotlin / Android

• Scarlet, a Retrofit inspired WebSocket client, manages the client-server connection for you. It makes use of a StateMachine to handle WebSocket connection correctly. Developed by Tinder, and has been in production for more than one year.

• OkHttp, an HTTP client for Android and Java applications

• moshi, JSON library for Kotlin and Java

• Timber, a logger which provides utility on top of Android’s Log class