IN2000 — Android Weather App

IN2000 – Software Engineering with Project Work at UiO. Built in a team of 6. This weather map application was nominated among the 10 best projects in the course cohort.

What the app does

An interactive map-based Android app that overlays real-time weather data as visual tiles on a map of Norway. Users can:

• Navigate a live map rendered with MapLibre
• See weather conditions visualised directly on the map (precipitation, wind, temperature layers)
• Tap locations to get detailed weather forecasts
• Access alerts and meteorological data per region

Architecture

MVVM (Model-View-ViewModel) with coroutines for async data fetching:

Jetpack Compose UI
        ↓
   ViewModel + StateFlow
        ↓
    Repository
   ↙         ↘
Remote API   Local cache

Backend tile server

The map weather tile layer was served from a custom backend tile server that:

• Fetches raw meteorological data from Norwegian API sources
• Renders weather data as image tiles (PNG) in the XYZ tile format
• Serves tiles to the app’s MapLibre layer

This separation means the heavy processing (data fetching + rendering) happens server-side, and the app just receives ready-to-display tiles.

MapLibre integration

• MapLibre GL native for Android handles tile rendering and map interaction
• Custom tile source pointing to the backend tile server
• Layer management: toggling weather overlays on/off
• Tap event handling for location-specific queries

Data sources

• Norwegian Meteorological Institute API (MET/Yr.no) for forecasts
• Gridded data for tile rendering
• Location services for current position

Team & process

Team of 6, developed over one semester using GitHub with pull request reviews, feature branches, and sprint-based planning (Scrum-adjacent).

Recognition

Nominated among the 10 best projects in IN2000 for the semester.