Keeping up with new Android libraries and trends is always a challenge. One technique I use is to always have a reference app handy. These apps showcase the latest Android architecture and patterns for UI and business logic separation, navigation UX and theming, data retrieval, threading, dependency injection, and testing.

The latest incarnation is called Recipes. This app conflates Meal and Code Recipes, creating a UX to demonstrate the techniques it describes. The goal was to brush up on the latest Android tech stack and pack as many features as I could into an app created in my “spare” time.

One data source is from TheMealDB which has categorized data with textual and visual information describing a semi-complex process (aka Meal Recipe). The app features category and cuisine browsing, ingredient lists with measurements, and step-by-step cooking instructions.

The UI showcases Material 3 design with adaptive layouts for phones, tablets, and foldables. Shared element transitions create fluid navigation between views.

The other data source was my 🧠, describing the code used to build the app in the form of Code Recipes. These recipes describe the wiring and plumbing used to create a visually compelling Android Application.

Topics include Metro dependency injection, Compose navigation with Nav3, shared element transitions, and adaptive layouts. Each recipe includes markdown-formatted descriptions with code syntax highlighting.

🤔🎭🎶 Mood Music is a game where users guess the mood of the music they hear. Players are presented with colorful buttons, each assigned a secret mood. Press a button to hear AI-generated music, then guess which emotion it evokes.

The game features multiple difficulty modes. Easy mode shows only the moods used in that round. Hard mode tests your emotional IQ by showing all possible moods.

When you press a button, the AI generates unique music based on the button’s hidden mood. The mood selector opens with emoji-labeled options like 🎉 Happy, 🌧️ Sad, or ⚡️ Energetic.

Each button has a randomly assigned icon with its own distinctive color palette. The music stops when you make your selection, building anticipation for the reveal.

I’ve always searched for the elusive write once, run everywhere solution. Kotlin is my favorite language and I enjoy Coroutines and Flows. All the new build tools and libraries have me excited about what comes next.

This repo contains my first KMP app, Koin app, Game Loop, All Compose app, and Vibe Code project. The app runs on Android, iOS, Desktop, and Web with shared code.

When Junie was released, I built an app that compiled and ran on all KMP platforms with an almost working game. It reminded me of how I start features—crank out code until something works, then stash and start making commits.

The Stars rendering logic showed how to use the Canvas Composable. The terrain generation laid out landing pads with mountains, craters, and rocks. The PhysicsEngine math worked out well.

The project leverages Kotlin Multiplatform with Compose Multiplatform to deliver on the “write once, run everywhere” promise. This runs on Android, iOS, Desktop, and Web with shared code. There’s a clean MVVM separation between UI, ViewModels, and data models.

Game logic is separated into: Physics engine, Camera system with dynamic zooming, procedural terrain generation, and sound service abstraction.