Exploring Android internals with ADB
summary
ADB is three pieces (adbd, adb server, adb client) and the demo uses command‑line ADB, getprop, uname -a (device runs Android 13 on Linux 5.10), dumpsys/cmd/pm/am, and scrcpy for display. The device lists 278 services (many are HALs), binder IPC lets framework call system services and service call ITelephony.call(S16,S16) actually places a phone call from shell, but service call only accepts strings/ints/floats. init parses ~120 rc files, zygote starts ART, and stop; start to reboot Android without rebooting Linux works. Building AOSP takes hours.
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chapters (12)
- 0:00Introduction and background
- 2:35ADB overview and setup
- 5:24Android architecture explained
- 9:35Binder and system services
- 13:05System services in practice
- 21:05Package and activity managers
- 25:51Native services and init
- 31:41Android sandboxing
- 34:52ADB shell and builds
- 35:57System properties
- 36:40Building custom Android
- 37:22Q&A session
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