Drawing a Ribbon Background in Compose
Article Summary
Anton Begeima from OkCupid shows how to create eye-catching ribbon backgrounds in Jetpack Compose using custom Path drawing. No third-party libraries needed—just pure Canvas API magic.
This tutorial walks through building a decorative ribbon label with a zigzag edge and layered background effect. The OkCupid engineer breaks down the geometry and drawing order step-by-step, making custom UI accessible for Android developers working in Compose.
Key Takeaways
- Uses drawWithCache modifier to create three layered shapes with different gradients
- Zigzag edge drawn with 5 triangles using Path and calculated geometry
- Background rectangle offset by 1/3 content height for depth effect
- Connecting triangle bridges foreground and background for ribbon appearance
Custom modifier combines Path drawing, translate transforms, and onDrawWithContent to create a reusable ribbon component without external dependencies.
About This Article
Android developers needed a way to build ribbon-shaped UI components with layered depth and zigzag edges. They wanted to do this without external libraries or writing complex custom drawing code.
Anton Begeima showed how to use Jetpack Compose's drawWithCache modifier with Path geometry. The approach builds three shapes: a main rectangle with 5 zigzag triangles, an offset background square, and a connecting triangle. Each shape gets its own linear gradient.
This creates a reusable custom modifier that OkCupid engineers can add to any Text composable in one line of code. No pre-rendered assets or third-party libraries needed. Developers keep full control over colors and dimensions.