Currency Converter

Pre Requisities

• A valid Fixer API key

Setup

• Add CURRENCY_API_KEY to your local.properties file
• Pase https://api.apilayer.com/fixer/ to BASE_URL on your local.properties file.
• Build the project

Background

Develop an application that:

• Can convert currencies between different bases
• Has an input field for amount (numbers only), by default always 1, and another input field to show the converted value
• Button to swap the values in FROM and TO, and accordingly converted data changed
• Show historical data for FROM/TO selections in last 3 days (day by day) - List and chart
• Rates converted to some other popular currencies.

Tech-stack

• Tech-stack

  • Kotlin - a cross-platform, statically typed, general-purpose programming language with type inference.

  • Coroutines - perform background operations.

  • Flow - handle the stream of data asynchronously that executes sequentially.

  • Hilt - Hilt is a dependency injection library for Android that reduces the boilerplate of doing manual dependency injection in your project.

  • Retrofit - A type-safe HTTP client for Android.

  • Jetpack

    • Lifecycle - perform action when lifecycle state changes.
    • ViewModel - store and manage UI-related data in a lifecycle conscious way.
    • Jetpack Navigation - Implement navigation, from simple button clicks to more complex patterns, such as app bars and the navigation drawer.

• Architecture

  • MVVM - Model View View Model in conjunction with modularization architecture

• Tests

  • Unit Tests (JUnit) - a simple framework to write repeatable tests.
  • Turbine - Turbine is a small testing library for kotlinx.coroutines
  • Coroutines tests - Test utilities for kotlinx.coroutines.
  • Truth - Truth makes your test assertions and failure messages more readable.

• CI/CD

  • Github Actions

Screenshots of the App:

screencapture-1675693032627.mp4