📅n elegant Android calendar view library with customizable month/week/year views, smooth expand animation, and system calendar integration. Based on CalendarView with refactored drawing logic.一个优雅的 Android 日历视图库，支持自定义月/周/年视图、月视图展开动效、年视图切换动画，以及系统日历日程集成。基于 CalendarView 重构绘制逻辑。