🎓 Sistem Akademik: Attendance & Security System

A modern Android application built with Jetpack Compose designed for automated student attendance tracking using Geofencing and Biometric Photo Verification.

📖 Overview

Sistem Akademik ensures high-integrity attendance by combining location data with visual proof. It restricts check-ins to a specific geographical radius around Universitas Bhayangkara Jakarta Raya and requires a real-time selfie, preventing proxy attendance.

🎨 Visual Identity

The application features a custom Pink & White aesthetic, providing a clean and friendly user experience while maintaining professional functionality.

🛠 Technical Specifications

Feature	Technology
UI Framework	Jetpack Compose (Material 3)
Language	Kotlin
Local Database	SQLite (User Credentials & Attendance Logs)
Location API	Fused Location Provider (High Accuracy)
Image Handling	Camera Intent & Base64 Encoding
Networking	HttpURLConnection (REST API/Webhook)

🗺 Geofencing Configuration

The system is hardcoded to validate coordinates against the UBH Bekasi Campus:

Latitude: -6.2238
Longitude: 107.0004
Allowed Radius: 500 Meters

Attempts made outside this boundary are logged as "Luar Radius" and blocked from server synchronization.

🔒 Security & Data

Authentication: Secured via local SQLite storage for NPM and Password hashing.
Data Integrity: Every check-in captures:
- Precise GPS Coordinates
- Real-time Timestamp
- Base64 Encoded Selfie Image
Synchronization: Real-time POST requests to n8n Automation Webhook.

📂 Architecture & Components

MainActivity.kt: Single activity managing the navigation state machine (Login → Register → Absensi ↔ History).
DatabaseHelper.kt: Robust SQLite layer managing two primary tables: users and attendance.
Theme.kt & Color.kt: Custom color tokens for the signature Pink/White UI.

🚦 Getting Started

Prerequisites

Android SDK 28+
Active GPS/Location Services
Camera Hardware Access

Permissions

The application requires the following runtime permissions:

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.CAMERA" />

📡 API Integration

Data is synchronized to the following production endpoint: https://n8n.lab.ubharajaya.ac.id/webhook/23c6993d-1792-48fb-ad1c-ffc78a3e6254

Created as a Final Project for the Mobile Programming Course.

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