Which one should I pick for a new project?

This question depends entirely on what you're building, since these are two fundamentally different libraries for different ecosystems:

blankj/androidutilcode is for Android development. It's a utility library that encapsulates commonly-used Android functions with complete demos and unit tests. The RepoPilot verdict rates it as "GO — Healthy across all four use cases," and it has strong community adoption (33,678 stars). Use this if you're building Android applications.

springfox/springfox is for Java/Spring applications. It's an API documentation framework that generates OpenAPI/Swagger documentation from Spring Boot annotations. Use this if you're building REST APIs on the Spring Framework and need to auto-generate interactive API documentation.

Pick blankj/androidutilcode if:

• You're developing an Android app and need utilities for common tasks (logging, file handling, etc.)

Pick springfox/springfox if:

• You're building a Spring Boot REST API and want automatic OpenAPI/Swagger documentation

If you're doing both: You might use both libraries in different parts of your project—springfox for your backend API service, and androidutilcode for your Android mobile client.

The README for springfox recommends starting with the springfox-boot-starter dependency for new Spring Boot projects, removing the older @EnableSwagger2 annotation approach.

FOLLOW_UPS:

• What type of application are you building?
• Do you need to generate API documentation automatically?
• Are you migrating from an existing setup?