Hotel Booking App Project (Android) with Room Search and Reservations

Booking a hotel on a phone means juggling filters, room types, taxes and cancellation policies — and the apps that do it well are complex pieces of software: search, listing, detail, checkout and booking management all talking to each other through a local database and a backend API. Most student "app" projects stop at two static screens and a button that goes nowhere, which is exactly what examiners poke at in a viva. This project builds the real thing: an Android hotel-booking app where a user picks a destination and dates, gets a sortable list of hotels with ratings and per-night prices, opens a hotel to compare room types with live "rooms left" counters, and completes a full reservation — guest details, a transparent price breakup with taxes, and a confirmation screen with a booking reference. Bookings persist in an on-device Room database and can be reviewed or cancelled from a My Bookings tab. The app is written in Kotlin with Jetpack Compose and MVVM, so the codebase reads like a production consumer app and gives the student genuinely answerable architecture questions.

1. The user selects a destination, check-in/check-out dates and guest count on the search screen; the app queries the hotel repository for matching stays.
2. Results render as hotel cards (photo, rating, review count, lowest per-night price) and can be re-sorted by price or rating without a new query.
3. Tapping a hotel opens its detail screen: the repository returns the hotel's room inventory, and each room type shows price, size, bed configuration and rooms remaining.
4. Choosing "Book" starts checkout — step one collects and validates guest name, phone and email.
5. Step two shows the price breakup: nightly rate × nights, plus a 12% taxes-and-fees line, with the total payable at the hotel.
6. Confirming generates a booking ID, writes the reservation to the Room database, and shows the confirmation screen; the booking appears under My Bookings.
7. From My Bookings the user can cancel a reservation, which updates its status to cancelled in the local database.

Tech stack:

• Kotlin
• Jetpack Compose (Material 3)
• MVVM architecture · ViewModel · StateFlow
• Room Database (local persistence)
• Retrofit · Gson (REST API layer)
• Kotlin Coroutines
• Coil (image loading)
• Android Studio · Gradle

• [Hotel search with filters] Search by destination city, check-in/check-out dates and guest count, with sort options for recommended, price (low to high) and rating — the full discover flow of a real booking app.
• [Hotel detail with room comparison] Each hotel shows photos, rating and review count, an amenity list, and its room types side by side — size, bed type, occupancy, per-night price and remaining-room counters.
• [Complete reservation flow] Three-step checkout: guest details with validation, a price breakup (room total plus taxes), then a confirmation screen with a generated booking ID — no dead-end buttons anywhere.
• [On-device booking management] All reservations persist in a Room database; the My Bookings tab lists upcoming and cancelled stays, and cancellations update the list immediately.
• [Seeded hotel catalogue] A realistic starter dataset of hotels across Indian cities (Goa, Pune, Mumbai, Jaipur, Udaipur) with rooms, prices and ratings, loaded through a repository layer that swaps to a live API without UI changes.
• [MVVM + clean architecture] ViewModels, repositories and data sources separated per Android best practice, with Kotlin coroutines for async work — the structure examiners expect to see in the code walkthrough.
• [Material 3 UI] Jetpack Compose screens with a modern travel-app look: search card, hotel cards, bottom navigation, and step indicators in the booking flow. (Optional: dark theme variant can be added on request.)
• [Future scope, not shipped] Live payment gateway integration, real-time room inventory sync, and push-notification price alerts are documented as extensions, not included in the base build.

• Complete Android Studio project source (Kotlin, Jetpack Compose, MVVM)
• Seeded hotel and room dataset with repository + Retrofit API stubs
• Room database schema, DAO and migration notes
• Signed debug APK for demo on a real device
• Project report PDF (architecture, data flow, database design, API contracts, test cases)
• PPT presentation for final review
• Viva Q&A preparation document (Compose, coroutines, Room, Retrofit, MVVM)
• Setup guide: SDK versions, Gradle sync steps, running on emulator and device