There is no shortage of material on Android internals. AOSP, official docs, blog posts, papers, trace discussions — it is all findable. The annoying part is that every piece speaks for a different version: this post concludes something about Android 12, that one does not say which version it tested, a third describes what happened on one particular device.

That gap is what AIW is for. The full name is Android Internal Wiki; the Chinese book title is 《Android 技术内幕：系统机制、性能优化与工具实战》 — five parts, twenty-six chapters, with the content pinned to Android 17. The repository is about to be open-sourced:

https://github.com/Gracker/android-internals-wiki

What the repository gives you is twenty-six chapters of content, a full table of contents, and an EPUB rebuilt every week.

Those twenty-six chapters are now far enough along to put in front of people. If you read a passage that does not match the source, an issue or a pull request is welcome.