An Android application that calculates Body Mass Index (BMI) using Kotlin and Jetpack Compose.

This application calculates a user's BMI based on their height (in meters) and weight (in kilograms) using the formula: BMI = weight / (height * height).

The app features:

• Input fields for height and weight
• Real-time BMI calculation
• BMI classification display (Underweight, Normal weight, Overweight, Obesity)
• Color-coded classification results

The project demonstrates the MVVM (Model-View-ViewModel) architecture pattern:

• UI components built with Jetpack Compose
• ViewModel to manage UI state and business logic
• State management using mutableStateOf

Initial implementation without proper architecture.

Refactored version using proper MVVM architecture.

• ViewModel: Handles state management and BMI calculations
• Compose UI: Modern declarative UI implementation
• Data Validation: Proper handling of decimal inputs and empty values
• BMI Classification: Classification based on WHO standards

• Underweight: BMI < 18.5
• Normal weight: 18.5 ≤ BMI < 25.0
• Overweight: 25.0 ≤ BMI < 30.0
• Obesity (Class 1): 30.0 ≤ BMI < 35.0
• Obesity (Class 2): 35.0 ≤ BMI < 40.0
• Obesity (Class 3): BMI ≥ 40.0