Backgrounds for wallpapers are loading through the open API https://api.nasa.gov.
Server api: Firebase (firebase branch) / REST api
- Glide
- Room
- JetPack Navigation
- LiveData
- Work Manager
- Wallpaper service
- SensorManager
- CoordinateLayout
Images from: https://api.nasa.gov/planetary/apod?api_key=DEMO_KEY
Install application from: https://play.google.com/store/apps/details?id=com.devapp.nasawallpaper