Asteroid Radar app

GIF

About

This app fetches live asteroid data from the internet using the NASA NeoWs API, along with the Picture of The Day using another NASA's API. It displays a list of all the asteroids (marked hazardous or otherwise) approaching the earth in the next 7 days from the user's current date. On clicking on an asteroid item, the user is taken to the detail screen where s(he) can see the details about that asteroid.

• Main screen

  • This screen reuses views using RecyclerView to display the list of the next 7 days' live asteroid data.
  • It also displays NASA's Image of The Day at the top of the screen.

• Detail screen

  • This screen displays useful asteroid data related to the asteroid item the user clicks. The data is displayed for the labels:
    1. Code name
    2. Close approcah date
    3. Estimated maximum diameter (km)
    4. Absolute magnitude (au)
    5. Relative velocity (km/s)
    6. Distance from Earth

• Offline

  • The app implements offline caching to allow users to interact with online content offline.
  • A Room database is created to store and access user data over time.
  • The app downloads the next 7 days asteroids and saves them in the database once a day using workManager with requirements of internet connection and device plugged in. The app can display saved asteroids from the database even if internet connection is not available.
  • The app can save the downloaded asteroids in the database and then display them also from the database. The app filters asteroids from the past.

• The app works in offline mode too, as it fetches the data once every day. The app uses networking and image best practices to fetch data and images.

• The app works correctly in talk back mode, it provides descriptions for all the texts and images: Asteroid images in details screen and image of the day. It also provides description for the details screen help button