Xref Aosp -

file:policy : Restricts your search to files with "policy" in the path (e.g., PhoneWindowManager.java ).

Simply put: If you do any AOSP development or analysis,

For developers, finding the definition of a specific function—say, AudioFlinger::openOutput() —by manually grepping through a local repo can take minutes. For reviewers trying to understand a patch's impact across subsystems, it’s a nightmare. xref aosp

: Often distributed as Docker-compose setups. This requires cloning the AOSP source (often hundreds of GBs) and using a generation script to index versions ranging from Android 5.0 to the latest releases. Key Technical Use Cases

Android Code Search excels at comparing code across branches. When investigating whether a particular behavior changed between Android 12 and Android 13, you can switch branches directly in the interface, then visually compare the same file across different versions. This capability is invaluable for determining if an observed bug is specific to your current platform version or exists upstream. file:policy : Restricts your search to files with

If an API you rely on has changed, you can use Xref to find all instances of that function across the entire codebase to understand how to migrate your code. How to Use xref.aosp.org Effectively 1. Searching for Definitions and Usages

The initial indexing will take significant time—potentially several hours for a full AOSP checkout. Once complete, access your private XRef server at http://<your-ip>:9092/source/ . : Often distributed as Docker-compose setups

Open that file and look at the code block.

^void .*Start\([^)]*\) : Uses regular expressions to find specific method structures in C++ or Java. Setting Up Your Own Local AOSP Xref

Enter —or more specifically, the AOSP Code Search and Cross-Reference tool hosted by Google (cs.android.com). While many developers have heard of "grep" or repo forall , the term "xref" has become shorthand for using a symbol-indexed, hyperlinked, web-based source code navigator .

View Git blame annotations and commit histories side-by-side with code.