Building Custom Hidden-Text Reveals in Jetpack Compose with Enriched Markdown
A native Android renderer enables interactive, animated text reveals without using WebView components.
1Native Markdown Rendering
Enriched Markdown for Android processes content as native text within Jetpack Compose, completely bypassing WebView dependencies. This architecture ensures better performance and tighter integration with the Compose UI toolkit. The library includes a default particle field effect for hidden text, demonstrating how developers can manipulate text visibility through custom overlay implementations.
2The Haunted House Demo
To showcase flexibility, the developer created a haunted house demo where each room features unique hidden text reveals. Elements like cobwebs, crypt fog, and jack-o'-lanterns serve as interactive overlays for a guest book. These visual themes demonstrate how the library handles complex, animated masking layers over standard text components in Android.
3Interface Implementation Logic
Developers implement a specific interface that returns an overlay for every line spanned by hidden text. This mechanism allows the overlay to draw directly on the text view's Canvas or a Compose DrawScope. Because the system supports frame-by-frame redrawing, it enables high-fidelity animations that respond dynamically to user interaction events.
4Precise Text Positioning
The library provides the exact coordinates of hidden words as they appear in the text view. This spatial awareness allows developers to apply effects like pixelation, blurring, or scrambling without layout shifts during reveal. By controlling the reveal transition, developers ensure that the underlying text remains perfectly aligned throughout the entire interaction.
5Customization Beyond Defaults
While the library ships with a particle field and a solid box, the haunted house demo proves that these are merely starting points. Developers can override the default reveal logic to create bespoke disappearance effects. This modularity allows for highly stylized UI components that fit specific application branding or thematic requirements.
6Integration and Documentation
Installation is handled via standard Gradle dependencies, with detailed documentation available for the custom overlays section. The README provides a concise thirty-line example of a basic pixelation effect, serving as a practical starting point for new users. Developers are encouraged to explore the API reference for deeper control over text rendering.
7Library Scope and Intent
The haunted house rooms are provided as demo code rather than core library features. This distinction keeps the main package lightweight while offering inspiration for advanced use cases. The maintainers focus on providing the underlying hooks, leaving the creative implementation of visual overlays entirely to the app developer's specific design needs.
8Community and Future Feedback
The project is hosted on GitHub, where stars and community feedback help increase visibility for the library. The maintainers are actively seeking input on which reveal styles are most practical for production environments. This collaborative approach helps refine the API for real-world mobile applications requiring interactive, hidden-text content display solutions.