Developer Notes

Android Libraries Used

• Android Paging Library
• Network library: Ktor
• Dependency injection: Koin
• Image loading library: Coil

Features

• Infinite scrolling grid of photos from Unsplash
• Fullscreen detail view with metadata
• Swipe navigation between photos in detail view
• Preserves scroll position when returning to grid view
• Dark mode support
• Offline caching of photos using Room database
• Share photo link
• Unit tests (APIService, Repository, Viewmodel, and Room)

UI Overview

1. Grid View

   • Paginated, infinite-scrolling grid of photos
   • Preserves each image’s aspect ratio (no cropping)
   • Supports both portrait & landscape orientations

2. Detail View

   • Tap any grid item to open fullscreen detail
   • Displays photo, author name, description/alt text, like count, etc.
   • Swipe left/right to navigate between photos
   • On dismiss, grid scroll position retains the last-viewed photo