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Changelog

v3.0.0

New Features

  • Haptic feedback: optional vibration on every button tap; toggled in Settings (AppPreference.HAPTIC_FEEDBACK, HapticFeedback.kt)
  • Compact mode: result display area compresses automatically on small or landscape screens; layout breakpoints defined in result_pad.xml for sw360dp, sw400dp, sw480dp

Material You Design Overhaul

  • Migrated all TextAppearance styles from TextAppearance.MaterialComponents.* to TextAppearance.Material3.* parents
  • Re-pointed all custom theme attrs (operatorBtnColor, numPadPrimary, textPrimary, etc.) to M3 semantic tokens so Dynamic Colors works automatically
  • Added MaterialDynamicTheme style — activates DynamicColors.applyToActivityIfAvailable() on Android 12+ to colour the UI from the device wallpaper
  • Added DYNAMIC to AccentTheme enum; Dynamic swatch appears in the colour picker only on API 31+ devices
  • Centralised accent theme application in BaseActivity — HistoryActivity and AboutActivity now correctly inherit the selected accent theme
  • Replaced Open Sans with Google Sans across all TextAppearance styles

Bug Fixes

  • DynamicColors broken on API 27+ devices: values-v27/themes.xml and values-night-v27/themes.xml were not updated during the Material You migration — custom attrs (textPrimary, textSecondary, border, operatorBtnColor, etc.) were pointing to static colour resources instead of M3 semantic tokens, so Dynamic Colors had no effect on the vast majority of active devices

Splash Screen

  • Replaced static mipmap launcher icon with ic_splash_animated.xml — an AnimatedVectorDrawable containing the four calculator symbols (+, −, ×, =); on API 31+ they cascade-pulse with a 150 ms stagger; the first frame is fully rendered so the compat layer displays correctly on Android 7+
  • Icon uses @color/splashIcon (dark in light mode, white in dark mode) against @color/background — no forced brand colour that clashes with accent themes

Numpad & Buttons

  • button_corner_radius raised 0dp → 16dp — all buttons now have M3 medium-shape rounded corners
  • Added 3dp margins to each button and 4dp outer padding to numpad container — creates visible gaps between buttons
  • Operator buttons (÷, ×, +, −) switched to NumPad.Secondary style — accent-colour fill with white text, clearly distinct from number keys
  • Removed flat border dividers between number and operator columns

Settings Screen

  • Each settings section (General, User Interface, App) wrapped in a MaterialCardView with 12dp corner radius and colorSurfaceContainerHigh background
  • Internal row dividers use ?attr/colorOutlineVariant
  • Added Haptic Feedback toggle row with vibrate icon

About Screen

  • Items (Join Beta, Open Source, Privacy Policy, Terms of Use) regrouped into a single MaterialCardView matching the settings page pattern — 72dp rows with two-line title/subtitle layout (Body1/Body2) and colorOutlineVariant dividers between items
  • All MaterialCardView corner radii bumped from 0dp to 12dp

v2.7.0

Build & Toolchain

  • Upgraded Gradle wrapper 8.13 → 9.4.1 (required by AGP 9.2)
  • Upgraded AGP 8.11.1 → 9.2.0 → 9.2.1
  • Upgraded Kotlin 2.1.20 → 2.3.21 (now managed via android.kotlin.version, KGP classpath removed)
  • Upgraded KSP to independent versioning: 2.3.8
  • Upgraded Hilt 2.57 → 2.59.2 (required for AGP 9 — drops BaseExtension dependency)
  • Upgraded Firebase perf-plugin 2.0.0 → 2.0.2 (fixes AGP 9 Transform API removal)
  • Migrated from kotlinOptions { jvmTarget } to kotlin { jvmToolchain(17) }
  • Bumped compileSdk 35 → 36

Android 16 (API 36) Support

  • Bumped targetSdkVersion 35 → 36
  • Added android:enableOnBackInvokedCallback="true" to AndroidManifest.xml to enable predictive back gesture animations (all activities already use OnBackPressedCallback)

R8 Minification & Resource Shrinking

  • Enabled minifyEnabled true and shrinkResources true in the release build type
  • Added ProGuard keep rules for: BigMath, custom XML-inflated views, enums, Firebase Crashlytics stack traces, TapTargetView, Play Review API
  • Enabled source file and line number attributes so Crashlytics stack traces remain readable after obfuscation
  • Release APK size reduced ~68%: 14.85 MB → 4.72 MB (~10 MB saved)

Bug Fixes

  • Theme crash on Android 16: Migrated all BaseTheme variants from Theme.MaterialComponents (M2) to Theme.Material3.DayNight.NoActionBar — MaterialToolbar in material:1.12.0 requires colorSurfaceContainer which M2 does not define, causing an InflateException on API 36
  • Release build crash (Firebase Perf): Disabled Firebase Perf bytecode instrumentation (instrumentationEnabled = false) — the AGP 9.x transform was corrupting the themed Context passed into MaterialToolbar's constructor; runtime data collection (network, custom traces, app start) is unaffected
  • ProGuard stripping: Added keep rules for MainActivity.changeAngleType (referenced by name in main_menu.xml) and About fragments (instantiated via Navigation's Class.forName)

UI

  • Added padding and maxLines constraint to NumPad button styles (res/values/themes.xml)

Dependencies

  • androidx.core:core-ktx 1.16.0 → 1.18.0
  • androidx.lifecycle (viewmodel + livedata) 2.9.2 → 2.10.0
  • firebase-bom 34.0.0 → 34.13.0
  • play-services-ads 24.5.0 → 24.8.0
  • google-services plugin 4.4.3 → 4.4.4
  • firebase-crashlytics-gradle 3.0.5 → 3.0.7

CI / Tooling

  • Added Fastlane configuration for version bumping and release management
  • Added GitHub Copilot environment setup workflow (copilot-setup-steps.yml)
  • Refined CI workflow triggers, removed redundant dependency downloads
  • Added CLAUDE.md with agent guidance for the project
  • Removed volatile .idea/ files from version control (added to .gitignore)

v2.6.0

New Features

  • Calculation History: Complete history management system - view, clear, and reuse your previous calculations
  • Theme Customization: Multiple app themes including system default, light, and dark modes
  • Accent Colors: Choose from 6 different accent colors (Blue, Green, Purple, Pink, Red, Grey) to personalize your experience
  • Smart Calculation: Auto-complete equations for faster input
  • Memory Functions: Store and recall values with memory buttons (MS/MR)

Improvements

  • Android 14 Support: Updated target SDK to Android 14 for better compatibility
  • Themed Icons: Added support for Android's themed icon system
  • Enhanced Performance: Updated core libraries for improved calculation speed
  • Better Settings: Organized settings with number separators, precision control, and auto-delete history options
  • Multi-language Support: Available in English, German, Spanish, French, Portuguese, and Hindi

Technical Updates

  • Updated all library dependencies for security and performance
  • Improved error handling for invalid expressions and edge cases
  • Enhanced UI responsiveness across different screen sizes
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