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Changelog

All notable changes to this project will be documented in this file. Format: Keep a Changelog

[Unreleased]

[1.1.1] - 2026-05-27

Fixed

  • Rename display name NoiseGuard → DecibelGuard in permission dialogs (MonitorScreen.kt)
  • Privacy policy URL updated to DecibelGuard repository
  • Version bump: versionCode 3 → 4

[1.1.0] - 2026-05-25

Added

  • Hilt 2.56.2 DI: @Singleton repository, @HiltViewModel on all ViewModels, AppModule
  • 13 instrumented tests: NoiseLevelDaoTest (9) + NavigationTest (4)
  • GitHub Actions CI/CD with green badge — unit tests on every push
  • HiltTestRunner, TestAppModule (in-memory Room), TestUtils for test infrastructure

Fixed

  • Multiple-ViewModel buffer bug: three independent NoiseRepositoryImpl instances caused clearing history while monitoring to silently fail
  • ActivityInvoker ClassNotFoundException on instrumented test teardown

[1.0.2] - 2026-05-24

Fixed

  • Permission flow: app now requests microphone and notification permissions on first launch via system dialog (previously showed blocked screen immediately)
  • Microphone unavailable toast appeared incorrectly when tapping STOP MONITORING
  • Version number in Settings was hardcoded as 1.0.0 (now uses BuildConfig.VERSION_NAME)
  • Notifications toggle showed ON even when Android notification permission was OFF

[1.0.1] - 2026-05-23

Fixed

  • License updated from CC BY-NC to BUSL-1.1
  • README: Hilt added to tech stack, Accompanist version corrected, Android Studio version updated to Meerkat (2025.1.1)
  • ARCHITECTURE.md: removed incorrect "No Hilt" section, replaced with actual DI setup
  • ADRs renumbered (clean sequence), ADR-004 documents Hilt decision
  • Calibration offset corrected to 80 dB throughout docs

[1.0.0] - 2026-05-19

Core

  • Real-time dB SPL monitoring via AudioRecord (RMS formula, 20–120 dB range)
  • 4 noise categories: QUIET · MODERATE · LOUD · HARMFUL
  • Calibrated dB calculation with 80 dB offset (RMS formula, verified in AudioAnalyzerDecibelsTest)

UI

  • Circular gauge with 270° cyan→magenta neon arc and peak marker
  • LED-style digital readout with glow effect
  • Neon dark theme (#0A0E1A base, fixed palette)
  • 3 screens: Monitor, History, Settings

Data

  • Room database with timestamp-indexed NoiseLevelEntity
  • DataStore for scalar preferences (threshold, toggles, sampling rate)
  • 30-day auto-cleanup via scheduled timestamp query
  • Hilt (2.56.2) for dependency injection — enforces singleton NoiseRepository across all ViewModels

Alerts

  • Push notifications with 30-second cooldown
  • Vibration alert with independent toggle
  • 3-state RECORD_AUDIO permission handling (granted → rationale → denied)
  • POST_NOTIFICATIONS requested contextually on API 33+

License

  • Released under Business Source License 1.1 (BUSL-1.1)
  • Free to study and use personally, commercial use prohibited
  • Converts to MIT on 2030-01-01