A clean, minimal calendar app for Android built entirely with Jetpack Compose and Material 3. No third-party dependencies, no bloat — just a fast, native calendar experience.
- Monthly calendar grid — clean 7-column layout with a Saturday-first week start
- Swipe navigation — swipe left/right anywhere on the screen to move between months
- Animated transitions — smooth slide animations when changing months, with correct directional logic
- Tap to navigate — tap the month or year in the header to jump directly via picker dialogs
- Year picker — scrollable grid covering 1991–2050, auto-scrolled to the current year
- Month picker — 3-column grid for quick month selection
- Today card — pinned bottom card showing today's full date; tap it to jump back to the current month
- Today & selected day indicators — today gets an outline ring; selected date gets a filled circle
- Edge-to-edge UI — full-screen layout with no wasted space
- Material 3 theming — follows system color scheme (light/dark mode)
| Layer | Technology |
|---|---|
| Language | Kotlin |
| UI | Jetpack Compose |
| Design system | Material 3 |
| Date/time | java.time (LocalDate, YearMonth) |
| Architecture | Single-Activity, Composable functions |
| Min SDK | 35 (Android 15) |
| Target SDK | 36 |
app/src/main/java/com/mrjis/calendar/
│
├── MainActivity.kt # Entry point; hosts CalendarApp composable
│
└── ui/theme/
├── Color.kt # App color palette
├── Theme.kt # MaterialTheme setup
└── Type.kt # Typography definitions
Key composables inside MainActivity.kt:
CalendarApp— root composable; manages state (current month, selected date, slide direction)CalendarHeader— animated month/year label with tap-to-pick supportWeekdayHeader— static Sat–Fri day-of-week labelsCalendarGrid—LazyVerticalGridrendering all day cells for a given monthDayCell— individual day tile with selected/today visual statesTodayDateCard— bottom card displaying today's full date and acting as a reset buttonYearPickerDialog— scrollable year selection dialogMonthPickerDialog— 3-column month selection dialog
- Android Studio Hedgehog or later
- Android SDK 35+
- Kotlin 2.x
git clone https://github.com/MrDeveloperJIS/Calendar-AndroidApp.git
cd Calendar-AndroidAppOpen the project in Android Studio, wait for Gradle sync, then run on a device or emulator running Android 15 (API 35) or higher.
This project is open source. See LICENSE for details.