WeChat Client Technology Team

Oct 12, 2015 · Mobile Development

How Android Resource Obfuscation Shrinks APK Size: Techniques & Implementation

This article explains how WeChat's resource obfuscation tool, AndResGuard, renames and compresses Android resources, modifies the resources.arsc binary, and combines 7‑zip compression to reduce APK size by about 1 MB while increasing anti‑tampering difficulty.