Anvil

Enables writing layouts in code with a React-like structure, making UI logic more readable and reducing boilerplate, as shown in the Java 8 and Kotlin examples.

Uses a virtual layout cache to diff changes and update only affected views lazily, minimizing performance overhead, with claims of thousands of render cycles per second.

Consists of only 4 hand-written classes plus 1 generated class, keeping the footprint small and integration lightweight, as emphasized in the features.

Supports Java 6, Java 8 with lambdas, and Kotlin, offering flexibility across language versions, with dedicated syntax examples for each.

Allows mixing code-based UI with existing XML layouts using xml() and withId() functions, easing migration from traditional Android development.