This is a test application used to practice some ideas or libraries to fulfill some architecture patterns.

It's currently a browsing APOD(Astronomy Picture of the Day) app that there's a main page to display many astronomy pictures, and click the picture will navigate to detail page containing the description of the astronomy picture. It uses the data from NASA APIs https://api.nasa.gov/planetary/apod.

App adopts Android Architecture Components - ViewModel & LiveData to fulfill MVVM pattern. It also utilize Kotlin Coroutine and OkHttp3 to help to fetch data from network, and Glide to load and show image.

In main page, there's a 2-dimensional recyclerView can scroll in both horizontal and vertical directions. MainRepository fetches data and MainViewModel processes the data and set to LiveData, then MainFragment observes the changes and display it on RecyclerView. When item is clicked, fragment will notify ViewModel, and ViewModel will call Navigator to notify MainActivity to launch DetailFragment. DetailFragment share the same ViewModel with MainFragment to avoid additional data fetch.