Jean-Luc Makiola
6a90bade8a
Replace the throwaway debug screen with the first real calendar UI and a functional Month <-> Week switcher, on Material 3 Expressive. Month view (S1): - Material 3 Expressive card-per-day grid; only the current month's weeks render (neighbouring days left blank) - per-day event dots with "+N" overflow, today via primaryContainer - spring-based press feedback from the active motion scheme - swipe + drawer navigation, Loading/Failure/Success states Week view (S2): - vertical time schedule with overlap-resolved lanes (per-day clipping, midnight spanning, instant events) - all-day / multi-day events as connected horizontal spans - single scroll container (gutter + day columns stay aligned), columns bundled in a rounded container, noon-centred on load - top section colour-shifts with the app bar on scroll; swipe navigation, three states Shared / infra: - CalendarHost holds the active view; RootScreen renders it post-permission - ui/common building blocks: CalendarDrawer, CalendarFailure, ViewSwitcherPill, pastelize, observable locale, M3 Expressive slide transition (motionScheme fastSpatialSpec) - unit tests for the week layout (lanes, clipping, all-day spans) - build: compileSdk 37, material3 pinned to 1.5.0-alpha21 for Expressive Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Calendula
A modern Material 3 Expressive calendar app for Android.
Calendula is named after the flower of the same name, whose name comes from
the Latin kalendae — the first day of the month — the same root as the
word "calendar". Calendula reads from Android's built-in CalendarContract,
so any calendar source synced to your device (CalDAV via DAVx5, Google,
local, WebCal subscriptions, ...) is shown.
Features (V1)
- Month, Week, and Day views
- Read-only event details (write support comes in V2)
- Multi-calendar visibility toggle
- Material You Dynamic Color (Android 12+)
- Light/Dark theme follows system
- German + English UI
Building
Requires Android SDK 36 and JDK 17. The Gradle wrapper is checked in, so no host Gradle install is needed:
# Build debug APK
./gradlew assembleDebug
# Run unit tests
./gradlew test
# Run lint
./gradlew lint
If your default JDK is something other than 17, set JAVA_HOME explicitly:
JAVA_HOME=/path/to/jdk-17 ./gradlew assembleDebug
License
MIT — Jean-Luc Makiola, 2026