Android calculator app

• Calculator (yeah...)
  • Addition, subtraction, multiplication, division, brackets
  • Integer division, modulus, square root, power, percent, factorial
  • Trigonometry: sin, cos, lg, ln, tan, ctg. Degrees and radians
  • Constants: Pi, Euler, Golden ratio
  • Memory
• Currency converter
  • Based on data from Russian Central Bank
  • Data can be updated automatically in background
  • Date selection: from 07.1992 till present
  • Setting to show only currencies you interested in
• Unit converter
  • 3 appearances: simple, half-powerful, powerful
  • Categories:
    • Velocity: m/s, m/min, km/min, km/h, ft/s, mph, mach, kn
    • Distance: mm, cm, dm, m, km, in, ft, yd, mi, nmi, ly, arshin
    • Area: mm², cm², dm², m², km², a, ha, in², ft², yd², acre
    • Volume: mm³, cm³ (ml), dm³ (L), m³, in³, ft³, yd³, gal_uk, oz_uk, qt_uk, pt_uk, bbl
    • Mass: mg, g, kg, qq, t, gr, oz, lb, ct, u
    • Pressure: atm, at, Pa, hPa, kPa, bar, mmHg, mmWg, inHg, inWg, psi
    • Temperature: ˚C, ˚F, K, ˚Ra, ˚Ré

• Material3-based app theming:
  • Follow System
  • Follow Battery Saver
  • Time-based Day/Night (time can be changed)
  • Light
  • Dark
  • Black
• Selecting between Dark and Black in automatic (Follow System, Follow Battery Saver, Day/Night) themes
• Android 12+ Dynamic Colors
• Adaptive Icon && Android 13+ Themed Icon
• Startup screen selection:
  • Calculator
  • Currency converter
  • Unit converter
  • Last opened

• Started in Java, migrated to Kotlin
• MVVM
• Room
• Retrofit
• Part of UI uses Jetpack Compose in minApi21 version
• JUnit
• CI (unit testing and publishing releases)
• DI (started)

• DI (continue)
• CI (code style)
• More tests
• Bug fixes
• Upcoming Android features support (if any useful)

Current limitation: you cannot build both minApi16 and minApi21 versions at the same time due to AGP limitations on Compose settings.

To build release artifact create local.properties file in project root and add following properties:

• signing.storeFile - path to signature file
• signing.storePassword - signature file password
• signing.keyAlias - signature key name
• signing.keyPassword - signature key password