CrpytoWatch

An Cryptocurrency tracker 💸 built for riding Android Jetpack 🚀. During Google IO18 the Android team released some new libraries along with existing Android Architecture Components. This app aims to use most of AAC libraries in MVVM architecture and serve as a sample written in Kotlin 💪

Components used

• Lifecycle - Used by LiveData.
• LiveData - For observing upon data in ViewModel.
• ViewModel - For managing UI data.
• Room - For persisting data.
• Paging - For loading long list or infinite data in RecyclerView
• Navigation - For simplifying navigation using Fragment.
• WorkManager - For running repeated background Work.
• DataBinding - For binding data with views in layout.

Other libraries used

• Dagger 2 - For Dependency Injection.
• Retrofit 2 - For making network call.
• Picasso - For loading images into ImageView.
• Gson - For converting JSON to POJO and vice versa.

What does this app do?

Extremely simple app which just shows list of cryptocurrencies and their present market value. I have used CoinMarketCap API as datasource for this application. You can add some currencies to watchlist which appear on top of home screen and in home screen widget.

This app fetches data once from API using Retrofit and caches it using Room. The watchlist is stored in SharedPreferences as list of IDs. It used Paging Libaray for loading data from database in discrete manner and UI is bound with data using DataBinding.

Screenshots

Prerequisites

• Android Studio 3.2 or later because Navigation library is only supported on newer versions.
• Android Device with...
  • Android L or above
  • Internet connection
  • USB Debugging enabled

To-Do

• Add watchlist
• Write tests
• Create widget
• Integrate DataBinding

Built With

• Android Studio - The Official IDE for Android.
• Kotlin - The Official Language for Android by JetBrains.
• Gradle - Build tool for Android Studio.
• Android Jetpack - Set of libraries to make dev easier.