Android Build

Covers both Gradle CLI app builds and AOSP/LineageOS ROM compilation, which is a surprisingly practical pairing since you often need both when doing custom Android work. The Gradle section hits the essential commands (assembleDebug, testing, signing) plus performance tuning that actually matters. The ROM side walks through repo sync, lunch/breakfast commands, and device tree structure. What's useful here is the build variant table and the actual output locations, so you're not hunting through /out wondering where your boot.img ended up. The troubleshooting section cuts off mid-sentence, but the meat is all there. If you're building either APKs or flashable zips, this gives you the command reference without the usual Android documentation maze.