MobileApp > Android > Architecture Overview
Android's configuration diagram
Android OS consists of Application, Framework, Library, Kernel and Runtime part.

Android source directory and Outline
| Folder name | Outline |
|---|---|
| bionic glibc | Interchangeable library |
| bootable | ブート関連 |
| build | build tool |
| cts | Interchangeability confirmation tool |
| dalvik | Virtual machine (DalvikVM) |
| development | development tool (Emulatorとか) |
| device | File related to device |
| external | 外部で開発されたソフトなど |
| frameworks | Android framework |
| hardware | Hardware 制御 Library |
| ndk | Native Development Kit |
| packages | Standard install application |
| prebuilt | Build Tool (ビルド済) |
| sdk | Android SDK |
| system | Device driver's source |
参考:Tech Onさん
http://202.214.174.10/article/NEWS/20081022/159959/?SS=imgview&FD=1265358400
UI部品の構成図↓視覚的で分かりやすい
参考:Adakodaさん
http://www.adakoda.com/adakoda/2010/01/android-ui.html