{"id":9881,"date":"2026-04-03T17:07:27","date_gmt":"2026-04-03T11:37:27","guid":{"rendered":"https:\/\/pheonixsolutions.com\/blog\/?p=9881"},"modified":"2026-04-03T17:08:28","modified_gmt":"2026-04-03T11:38:28","slug":"architecting-a-high-performance-event-calendar-custom-ui-implementation-and-api-integration-in-jetpack-compose","status":"publish","type":"post","link":"https:\/\/pheonixsolutions.com\/blog\/architecting-a-high-performance-event-calendar-custom-ui-implementation-and-api-integration-in-jetpack-compose\/","title":{"rendered":"Architecting a High-Performance Event Calendar: Custom UI Implementation and API Integration in Jetpack Compose"},"content":{"rendered":"\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Objective<\/strong><\/h3>\n\n\n\n<p>The objective of this module is to design and implement a <strong>production-grade Dynamic Calendar and Class Booking system<\/strong> for the <strong>United Grooves<\/strong> mobile application. The module provides users with a seamless way to browse, filter, and book sessions using a highly responsive, modern interface built with Jetpack Compose.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Requirements<\/strong><\/h3>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Functional Requirements<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Dynamic Week Navigation:<\/strong> Implementation of a &#8220;Week of&#8221; selector with a built-in DatePicker for jumping to specific dates.<\/li>\n\n\n\n<li><strong>Context-Aware Date Row:<\/strong> A horizontal scrollable date row that displays class counts per day.<\/li>\n\n\n\n<li><strong>Search &amp; Discovery:<\/strong> Integrated search bar to filter classes by title or instructor name in real-time.<\/li>\n\n\n\n<li><strong>Advanced Filtering:<\/strong> Dropdown systems for &#8220;Activity&#8221; and &#8220;Instructor&#8221; categories.<\/li>\n\n\n\n<li><strong>Booking Integration:<\/strong> Actionable event cards supporting &#8220;Add to Cart&#8221; and &#8220;Book Now&#8221; workflows.<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Non-Functional Requirements<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Performance Optimization:<\/strong> Efficient list rendering using <code>LazyColumn<\/code> and <code>LazyRow<\/code> to ensure smooth scrolling.<\/li>\n\n\n\n<li><strong>Architecture:<\/strong> Adherence to Clean Architecture and MVVM (Model-View-ViewModel) patterns.<\/li>\n\n\n\n<li><strong>Theming &amp; Branding:<\/strong> Strict implementation of the <code>UnitedGroovesTheme<\/code> for design consistency.<\/li>\n\n\n\n<li><strong>State Management:<\/strong> Utilization of <code>StateFlow<\/code> and <code>collectAsStateWithLifecycle<\/code> for lifecycle-aware UI updates.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Pre-Requisites<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Hilt Dependency Injection:<\/strong> Configured for ViewModel and Repository management.<\/li>\n\n\n\n<li><strong>Java 8+ \/ ThreeTenABP:<\/strong> Required for <code>java.time<\/code> API support on older Android versions.<\/li>\n\n\n\n<li><strong>Custom Design System:<\/strong> Pre-defined <code>UnitedGroovesTheme<\/code> and custom components like <code>ProfileViewHeader<\/code> and <code>EventFilterDropdown<\/code>.<\/li>\n\n\n\n<li><strong>GraphQL\/Data Layer:<\/strong> A functional backend or repository layer to provide class data.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Solutions<\/strong><\/h3>\n\n\n\n<p>The <strong>Jetpack Compose<\/strong> framework was leveraged to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Create a <strong>Stateless UI<\/strong> where the <code>CalendarScreen<\/code> reacts to a single <code>CalendarState<\/code> object.<\/li>\n\n\n\n<li>Design <strong>Reusable UI Components<\/strong> (Event Cards, Search Bars) that can be utilized across other app modules.<\/li>\n\n\n\n<li>Implement <strong>Base64 Bitmap Decoding<\/strong> directly within the Composable using <code>remember<\/code> blocks to optimize image rendering performance.<\/li>\n\n\n\n<li>Use <strong>Hilt ViewModel<\/strong> to decouple business logic (date calculations and filtering) from the UI layout.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>High-Level Design (HLD)<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/pheonixsolutions.com\/blog\/wp-content\/uploads\/2026\/04\/image.png\"><img loading=\"lazy\" decoding=\"async\" width=\"851\" height=\"1024\" src=\"https:\/\/pheonixsolutions.com\/blog\/wp-content\/uploads\/2026\/04\/image-851x1024.png\" alt=\"\" class=\"wp-image-9882\" srcset=\"https:\/\/pheonixsolutions.com\/blog\/wp-content\/uploads\/2026\/04\/image-851x1024.png 851w, https:\/\/pheonixsolutions.com\/blog\/wp-content\/uploads\/2026\/04\/image-249x300.png 249w, https:\/\/pheonixsolutions.com\/blog\/wp-content\/uploads\/2026\/04\/image-768x925.png 768w, https:\/\/pheonixsolutions.com\/blog\/wp-content\/uploads\/2026\/04\/image.png 922w\" sizes=\"auto, (max-width: 851px) 100vw, 851px\" \/><\/a><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Low-Level Design (LLD)<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/pheonixsolutions.com\/blog\/wp-content\/uploads\/2026\/04\/image-1.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"554\" src=\"https:\/\/pheonixsolutions.com\/blog\/wp-content\/uploads\/2026\/04\/image-1-1024x554.png\" alt=\"\" class=\"wp-image-9883\" srcset=\"https:\/\/pheonixsolutions.com\/blog\/wp-content\/uploads\/2026\/04\/image-1-1024x554.png 1024w, https:\/\/pheonixsolutions.com\/blog\/wp-content\/uploads\/2026\/04\/image-1-300x162.png 300w, https:\/\/pheonixsolutions.com\/blog\/wp-content\/uploads\/2026\/04\/image-1-768x415.png 768w, https:\/\/pheonixsolutions.com\/blog\/wp-content\/uploads\/2026\/04\/image-1-555x300.png 555w, https:\/\/pheonixsolutions.com\/blog\/wp-content\/uploads\/2026\/04\/image-1.png 1332w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Tech Stack<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Language:<\/strong> Kotlin<\/li>\n\n\n\n<li><strong>UI Framework:<\/strong> Jetpack Compose<\/li>\n\n\n\n<li><strong>Architecture:<\/strong> MVVM + Clean Architecture<\/li>\n\n\n\n<li><strong>Dependency Injection:<\/strong> Hilt<\/li>\n\n\n\n<li><strong>Asynchronous Logic:<\/strong> Coroutines &amp; Flow<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Challenges<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Dynamic Week Synchronization:<\/strong> Ensuring that selecting a date via the DatePicker correctly updates the horizontal &#8220;Week Date Row&#8221; and the &#8220;Week of&#8221; header simultaneously.<\/li>\n\n\n\n<li><strong>Image Rendering:<\/strong> Handling Base64 strings for class images without causing UI lag or &#8220;jank&#8221; during list scrolling.<\/li>\n\n\n\n<li><strong>Filtering Logic:<\/strong> Maintaining a smooth UX when multiple filters (Search + Instructor + Activity) are applied at once.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>FAQ<\/strong><\/h3>\n\n\n\n<p><strong>1. Why use a custom Week Selector instead of a standard Calendar view?<\/strong><\/p>\n\n\n\n<p>To provide a more focused &#8220;Schedule&#8221; experience that highlights class availability per day, which is more intuitive for fitness or session-based booking.<\/p>\n\n\n\n<p><strong>2. How does the app handle empty states?<\/strong><\/p>\n\n\n\n<p>The module includes a conditional UI check that displays a &#8220;No classes for selected date&#8221; message and a <code>CircularProgressIndicator<\/code> during data fetching to keep the user informed.<\/p>\n\n\n\n<p><strong>3. Is the filtering done locally or on the server?<\/strong><\/p>\n\n\n\n<p>In this implementation, the <code>ClassViewModel<\/code> handles the filtering logic, allowing for near-instant UI updates as the user types or selects categories.<\/p>\n\n\n\n<p><strong>4. Can this module handle Dark Mode?<\/strong><\/p>\n\n\n\n<p>Yes. By utilizing <code>UnitedGroovesTheme<\/code>, all components like <code>Surface<\/code>, <code>Card<\/code>, and <code>Text<\/code> automatically adapt their color mapping based on the system&#8217;s UI mode.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Conclusion<\/strong><\/h3>\n\n\n\n<p>The Calendar module for<strong> United<\/strong> <strong>Grooves<\/strong> demonstrates how modern Android tools like Jetpack Compose can be used to build complex, data-driven interfaces that remain clean, maintainable, and highly performant.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Objective The objective of this module is to design and implement a production-grade Dynamic Calendar and Class Booking system for the United Grooves mobile application. The module provides users with a seamless way to browse, filter, and book sessions using a highly responsive, modern interface built with Jetpack Compose. Requirements&hellip; <a href=\"https:\/\/pheonixsolutions.com\/blog\/architecting-a-high-performance-event-calendar-custom-ui-implementation-and-api-integration-in-jetpack-compose\/\" class=\"more-link read-more\" rel=\"bookmark\">Continue Reading <span class=\"screen-reader-text\">Architecting a High-Performance Event Calendar: Custom UI Implementation and API Integration in Jetpack Compose<\/span><i class=\"fa fa-arrow-right\"><\/i><\/a><\/p>\n","protected":false},"author":537,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-9881","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"hentry","6":"category-uncategorized","7":"h-entry","9":"h-as-article"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Pheonix Solutions - We Empower Your Business Growth<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/pheonixsolutions.com\/blog\/architecting-a-high-performance-event-calendar-custom-ui-implementation-and-api-integration-in-jetpack-compose\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pheonix Solutions - We Empower Your Business Growth\" \/>\n<meta property=\"og:description\" content=\"Objective The objective of this module is to design and implement a production-grade Dynamic Calendar and Class Booking system for the United Grooves mobile application. 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