12.Android Source directory structure detailed (GO)

Reprint: http://blog.csdn.net/google_huchun/article/details/59576654

Android 2.1
|–makefile
|–bionic (Bionic C library)
|–bootable (boot boot related code)
|–build (Storage System compilation rules and basic development package configuration such as generic)
|–cts (Android Compatibility test suite standard)
|–dalvik (Dalvik Java Virtual machine)
|–development (Application development related)
|–external (some open-source modules used by Android)
|–frameworks (Core framework--java and C + + language)
|–hardware (Some manufacturers open source hard Zhei with the HAL Code)
|–out (the code output with this directory after compilation is complete)
|–packages (Application package)
|–prebuilt (pre-compiled resources in x86 and ARM architectures)
|–SDK (SDK and simulator)
|–system (underlying file system library, applications and Components--c language)
' –vendor (vendor custom code)

Bionic directory
|–LIBC (C library)
| |–arch-arm (ARM architecture, including system call Assembly implementation)
| |–arch-x86 (x86 architecture, including system call Assembly implementation)
| |–bionic (functionality implemented by C, architecture Independent)
| |–docs (Documentation)
| |–include (head file)
| |–inet (? inet related, specific role unknown)
| |–kernel (some header files in the Linux kernel)
| |–netbsd (? NESBSD system-related, specific role unknown)
| |–private (? Some private header files)
| |–stdio (Stdio implementation)
| |–stdlib (Stdlib implementation)
| |–string (String function Implementation)
| |–tools (several tools)
| |–tzcode (time zone related code)
| |–UNISTD (UNISTD implementation)
|-- zoneinfo （时区信息） 
|-- libdl （libdl实现，dl是动态链接，提供访问动态链接库的功能） 
|-- libm （libm数学库的实现，） 
| |-- alpha （apaha架构） 
| |-- amd64 （amd64架构） 
| |-- arm （arm架构） 
| |-- bsdsrc （？bsd的源码） 
| |-- i386 （i386架构） 
| |-- i387 （i387架构？） 
| |-- ia64 （ia64架构） 
| |-- include （头文件） 
| |-- man （数学函数，后缀名为.3，一些为freeBSD的库文件） 
| |-- powerpc （powerpc架构） 
| |-- sparc64 （sparc64架构） 
|–SRC (source code)
|–libstdc++ (libstdc++ C + + implementation Library)
| |–include (head file)
|-- src （源码） 
|-- libthread_db （多线程程序的调试器库） 
|–include (header file)
-- linker （动态链接器） 
–arch (supports arm and x86 two architectures)

Bootable Directory
.
|–bootloader (common code for various bootloader)
| -- legacy （估计不能直接使用，可以参考） 
| |-- arch_armv6 （V6架构，几个简单的汇编文件） 
| |-- arch_msm7k （高通7k处理器架构的几个基本驱动） 
| |-- include （通用头文件和高通7k架构头文件） 
| |-- libboot （启动库，都写得很简单） 
| |-- libc （一些常用的c函数） 
| |-- nandwrite （nandwirte函数实现） 
|–usbloader (Usbloader implementation)
|–diskinstaller (Android Image Packager, x86 can produce ISO)
-- recovery （系统恢复相关） 
|-- edify （升级脚本使用的edify脚本语言） 
|-- etc （init.rc恢复脚本） 
|-- minui （一个简单的UI） 
|-- minzip （一个简单的压缩工具） 
|-- mtdutils （mtd工具） 
|-- res （资源） 
|–images (Some pictures)
|–tools (tool)
| -- ota （OTA Over The Air Updates升级工具） 
–updater (upgrade)

Build Directory
.
|–core (core compilation rule)
|–history (History)
|–libs
|-- host （主机端库，有android “cp”功能替换） 
|-- target （目标机编译对象） 
| |-- board （开发平台） 
| | |-- emulator （模拟器） 
| | |-- generic （通用） 
| | |-- idea6410 （自己添加的） 
| |–sim (simplest)
|-- product （开发平台对应的编译规则） 
|–security (Key related)
-- tools （编译中主机使用的工具及脚本） 
|-- acp （Android "acp" Command） 
|-- apicheck （api检查工具） 
|-- applypatch （补丁工具） 
|-- apriori （预链接工具） 
|-- atree （tree工具） 
|-- bin2asm （bin转换为asm工具） 
|-- check_prereq （检查编译时间戳工具） 
|-- dexpreopt （模拟器相关工具，具体功能不明） 
|-- droiddoc （？作用不明，java语言，网上有人说和JDK5有关） 
|-- fs_config （This program takes a list of files and directories） 
|-- fs_get_stats （获取文件系统状态） 
|-- iself （判断是否ELF格式） 
|-- isprelinked （判断是否prelinked） 
|-- kcm （按键相关） 
|-- lsd （List symbol dependencies） 
|-- releasetools （生成镜像的工具及脚本） 
|-- rgb2565 （rgb转换为565） 
|-- signapk （apk签名工具） 
|-- soslim （strip工具） 
–zipalign (Zip archive alignment tool)

Dalvik Directory Dalvik virtual machines
.
|–DALVIKVM (Directory of MAIN.C)
|–dexdump (Dex disassembly)
|–dexlist (List all methods with all concrete classes in a DEX file.)
|–dexopt (pre-validation and optimization)
|–docs (document)
|–dvz (a command related to zygote)
|–DX (DX tool, convert multiple Java to DEX)
|–hit (? Written in the Java language)
|–libcore (Core library)
|–libcore-disabled (? Disabled libraries)
|–libdex (Dex's library)
|–libnativehelper (support functions for Android ' s class libraries)
|–tests (test code)
|–tools (tool)
' –VM (virtual machine implementation)

Development directory (some routines and tools required by the developer)
|–apps (some core applications)
| |–bluetoothdebug (Bluetooth DEBUG program)
| |–customlocale (custom locale)
| |–development (Development)
| |–fallback (a language-related program)
| |–fontlab (Font)
| |–gesturebuilder (Gesture action)
| |–ninepatchlab (? ）
| |–objviewer (obj viewer)
| |–sdksetup (SDK installer)
| |–spareparts (Advanced settings)
| |–term (Telnet)
|--Launchperf (? ）
|--build (Compile script template)
|--Cmds (with a monkey tool)
|--Data (configuration)
|--Docs (documentation)
|--Host (USB driver, etc.)
|--IDE (integrated development environment)
|--NDK (Local Development Kit--C Language Development Kit)
|--PDK (Plug development Kit)
|--Samples (routine)
| |--aliasactivity (? ）
| |--Apidemos (API demo program)
| |--bluetoothchat (bluetooth chat)
| |--browserplugin (Browser plugin)
| |--businesscard (commercial card)
| |--Compass (COMPASS)
| |--contactmanager (contact Manager)
| |--Cubelivewallpaper (a simple routine for live wallpaper)
| |--fixedgridlayout (like layout)
| |--globaltime (global Time)
| |--helloactivity (Hello)
| |--Home (HOME)
| |--jetboy (jetboy game)
| |--Lunarlander (seemingly another game)
| |--mailsync (mail sync)
| |--multiresolution (Multi-resolution)
| |--mysamplerss (RSS)
| |--NotePad (NOTEPAD)
| |--rssreader (RSS reader)
| |--searchabledictionary (Directory search)
| |--simplejni (JNI routines)
| |--skeletonapp (empty shell app)
| |--Snake (Snake program)
| |--softkeyboard (soft keyboard)
| |--Wiktionary (? Wikipedia
|–wiktionarysimple (? Wiki routines)
|–scripts (script)
|–SDK (SDK Configuration)
|–simulator (? Simulator)
|–testrunner (? For testing)
' –tools (some tools)

External directory
.
|–aes (AES Encryption)
|–apache-http (Web server)
|–astl (Astl (Android STL) is a slimmed-down version of the regular C + + STL.)
|–bison (automatically generate parser to convert unrelated grammars to C, C + +)
|–blktrace (Blktrace is a block layer IO tracing mechanism)
|–bluetooth (Bluetooth-related, protocol stack)
|–bsdiff (diff tool)
|–BZIP2 (compression tool)
|–clearsilver (HTML template system)
|–dbus (Low latency, low overhead, high availability IPC mechanism)
|–DHCPCD (DHCP service)
|–dosfstools (DOS file System tool)
|–dropbear (SSH2 server)
|–e2fsprogs (EXT2 file System tool)
|–elfcopy (tool for copying Elf)
|–elfutils (elf Tools)
|–embunit (Embedded Unit Project)
|–emma (Java Code Coverage Statistics tool)
|–ESD (enlightened sound Daemon, mixing multiple audio streams on one device)
|–expat (Expat is a stream-oriented XML parser.)
|–FDLIBM (FDLIBM (freely distributable LIBM))
|–freetype (font)
|–fsck_msdos (DOS file system Check tool)
|–gdata (Google's wireless data related)
|–GENEXT2FS (GENEXT2FS generates an ext2 filesystem as a normal (non-root) user)
|–giflib (GIF library)
|–googleclient (Google user library)
|–grub (This is GNU grub, the GRand Unified Bootloader.)
|–gtest (Google C + + testing Framework)
|–ICU4C (ICU (International Component for Unicode) in the C + + version)
|–ipsec-tools (This package provides a-to use the native IPSec functionality)
|–iptables (firewall)
|–jdiff (Generate a report describing the difference between both public Java APIs.)
|–jhead (JPEG header information tool)
|–jpeg (JPEG library)
|–junit (JUnit is a unit test framework for the Java language)
|–kernel-headers (some header files for the kernel)
|–libffi (Libffi is a foreign function interface library.)
|–LIBPCAP (network packet capture function)
|–libpng (PNG library)
|–LIBXML2 (XML parsing library)
|–MTPD (one command)
|–netcat (simple Unix utility which reads and writes Dataacross network connections)
|–netperf (Network performance measurement tool)
|–neven (see Code and JNI related)
|–opencore (Multimedia framework)
|–OPENSSL (SSL encryption related)
|–openvpn (VPN open Source Library)
|–oprofile (Oprofile) is a performance analysis mechanism supported by the Linux kernel. ）
|–ping (ping command)
|–PPP (pppd dialing command, as if there was no chat)
|–proguard (Java class file Shrinker, Optimizer, Obfuscator, and Preverifier)
|–protobuf (a flexible, efficient, automated mechanism for serializing structured data)
|–qemu (ARM Simulator)
|–SAFE-IOP (Functions for performing safe integer operations)
|–skia (Skia graphics engine)
|–sonivox (sole MIDI solution for Google Android Mobile Phone Platform)
|–speex (use of Speex codec/Decode API (Libspeex))
|–sqlite (Database)
|–srec (Open source continuous non-specific person speech recognition provided by Nuance Company)
|–strace (Trace tool)
|–svox (Embedded Text-to-Speech)
|–tagsoup (Tagsoup is a Java-developed SAX-compliant HTML parser)
|–tcpdump (software to catch TCP packets)
|–tesseract (tesseract Open Source OCR Engine.)
|–tinyxml (TinyXML is a simple, small, C + + XML parser)
|–tremor (I stream and file decoder provides an embeddable,integer-only library)
|–webkit (Browser Core)
|–wpa_supplicant (wireless card management)
|–xmlwriter (XML editing tools)
|–YAFFS2 (yaffs file system)
' –zlib (a general purpose data compression library)

Frameworks directory (core framework--java and C + + language)
.
|–base (Basic content)
| |–api (? is an XML file that defines the Java API? ）
| |–awt (AWT library)
| |–build (Empty)
| |–camera (Camera service library)
| |–cmds (Important command: AM, APP_PROCE, etc.)
| |–core (Core library)
| |–data (data files such as fonts and sounds)
| |–docs (Documentation)
| |–graphics (Graphic related)
| |–include (head file)
| |–keystore (related to data signing certificate)
| |–libs (Library)
| |–location (Regional Library)
| |–media (media related library)
| |–obex (Bluetooth transfer Library)
| |–opengl (2d-3d acceleration Library)
| |–packages (Setup, TTS, VPN program)
| |–sax (XML parser)
| |–services (various service programs)
| |–telephony (telephone communication Management)
| |–test-runner (test tool related)
| |–tests (Various tests)
| |–tools (some name-less tool)
| |–vpn (VPN)
|-- wifi （无线网络） 
|-- opt （可选部分） 
| |-- com.google.android （有个framework.jar） 
| |-- com.google.android.googlelogin （有个client.jar） 
|–emoji (Standard message elements)
-- policies （Product policies are operating system directions aimed at specific uses） 
–base
|–mid (Mid device)
' –phone (mobile device, general use this)

Hardware catalog (Some manufacturers open source hard Zhei layer HAL code)
|–broadcom (Bo Tong Company)
|-- wlan （无线网卡） 
|-- libhardware （硬件库） 
| |-- include （头文件） 
|–modules (Default (and possibly Architecture dependents) HAL modules)
| |–gralloc (Gralloc display related)
|-- overlay （Skeleton for the "overlay" HAL module.） 
|-- libhardware_legacy （旧的硬件库） 
| |-- flashlight （背光） 
| |-- gps （GPS） 
| |-- include （头文件） 
| |-- mount （旧的挂载器） 
| |-- power （电源） 
| |-- qemu （模拟器） 
| |-- qemu_tracing （模拟器跟踪） 
| |-- tests （测试） 
| |-- uevent （uevent） 
| |-- vibrator （震动） 
|–wifi (Wireless)
|–msm7k (high-pass 7k processor Open source abstraction layer)
| |–boot (START)
| |–libaudio (sound library)
| |–libaudio-qsd8k (qsd8k's sound-related library)
| |–libcamera (Camera library)
| |–libcopybit (Copybit library)
| |–libgralloc (Gralloc library)
| |–libgralloc-qsd8k (qsd8k's Gralloc library)
| |–liblights (Backlight library)
|-- librpc （RPC库） 
|-- ril （无线电抽象层） 
| |-- include （头文件） 
| |-- libril （库） 
| |-- reference-cdma-sms （cdma短信参考） 
| |-- reference-ril （ril参考） 
|–rild (RIL background service program)
-- ti （ti公司开源HAL） 
|-- omap3 （omap3处理器） 
| |-- dspbridge （DSP桥） 
| |-- libopencorehw （opencore硬件库） 
| |-- liboverlay （overlay硬件库） 
| |-- libstagefrighthw （stagefright硬件库） 
|–OMX (OMX components)
' –wlan (Wireless card)

Packages Directory
.
|–apps (Application Library)
| |–alarmclock (Alarm clock)
| |–bluetooth (Bluetooth)
| |–browser (Browser)
| |–calculator (Calculator)
| |–calendar (Calendar)
| |–camera (camera)
| |–certinstaller (digital signature installed in Android, called)
| |–contacts (Dial-up (call), contact, call history)
| |–deskclock (Desktop clock)
| |–email (Email)
| |–gallery (Photo album, similar to Camera, more lists)
| |–gallery3d (? 3D albums)
| |–globalsearch (for Google Search service, provide the underlying application)
| |–googlesearch (Google search)
| |–htmlviewer (browser-attached interface, called by the browser application, while providing storage recording function)
| |–im (Instant messaging, to provide signal transmission, reception, communication services for mobile phones)
| |–launcher (login launcher, display picture frame and so on graphical interface)
| |–launcher2 (login startup, responsible for application invocation)
| |–mms (? MMS Service)
| |–music (music player)
| |–packageinstaller (response of installation and uninstallation program)
| |–phone (Phone Dialer)
| |–provision (the state of the preset application, enable to apply)
| |–settings (Power on, Bluetooth, device info, interface, WIFI, etc.)
| |–soundrecorder (recorder, calculate the space and time required to store)
| |–STK (Receive and send SMS)
| |–sync (empty) ——-
| |–updater (Empty)
|-- VoiceDialer （语音识别通话） 
|-- inputmethods （输入法） 
| |-- LatinIME （拉丁文输入法） 
| |-- OpenWnn （OpenWnn输入法） 
|–pinyinime (Pinyin Input method)
|–providers (provider, providing the data required by the application and interface)
| |–applicationsprovider (Application provider, providing application startup items, updates, etc.)
| |–calendarprovider (Calendar provider)
| |–contactsprovider (Contact provider)
| |–downloadprovider (download management provider)
| |–drmprovider (called when creating and updating a database)
| |–googlecontactsprovider (subclass of contact provider to synchronize contacts)
| |–googlesubscribedfeedsprovider (set information provider)
| |–improvider (Empty)
| |–managementprovider (Empty)
| |–mediaprovider (media provider, providing storage data)
| |–telephonyprovider (MMS provider)
| |–userdictionaryprovider (user dictionary provider, providing user characters commonly used dictionary)
|-- WebSearchProvider （空） 
|-- services 
| |-- EasService （空） 
|–lockandwipe (empty)
-- wallpapers （墙纸） 
|-- Basic （基本墙纸，系统内置墙纸） 
|-- LivePicker （选择动态壁纸） 
|-- MagicSmoke （壁纸特殊效果） 
–musicvisualization (music visualization, graphics change with music)

There is a hidden inside. Git folder, the content is the same, there is no meaningful code, Config looks like a download program, so that there is no substance in these folders.

prebuilt directory (Some of the resources precompiled under x86 and ARM architectures)
.
|–android-arm (arm-android related)
| |–gdbserver (GDB debugger)
| -- kernel （模拟的arm内核） 
|-- android-x86 （x86-android相关） 
|–kernel (empty)
|–common (generic compiled code, should be Java)
|–darwin-x86 (Drawin x86 platform)
| -- toolchain （工具链） 
| |-- arm-eabi-4.2.1 
| |-- arm-eabi-4.3.1 
|–arm-eabi-4.4.0
|–darwin-x86_64 (Drawin x86 64bit platform)
|–linux-x86 (Linux x86 platform)
| -- toolchain （工具链，我们应该主要用这个） 
| |-- arm-eabi-4.2.1 
| |-- arm-eabi-4.3.1 
| |-- arm-eabi-4.4.0 
|–i686-unknown-linux-gnu-4.2.1 (version x86 compiler)
|–linux-x86_64 (Linux x86 64bit platform)
|–windows (Windows platform)
' –windows-x86_64 (64bit Windows platform)
System directory (underlying file system library, applications and Components--c language)

|–bluetooth (Bluetooth related)
|–core (System core Tool Box interface)
| |–adb (ADB debugging tool)
| |–cpio (Cpio tool, creating IMG)
| |–debuggerd (Debug tool)
| |–fastboot (Quick start related)
| |–include (System to answer oral documents)
| |–init (init program source code)
| |–LIBACC (lightweight C compiler)
| |–libctest (LIBC test related)
| |–libcutils (libc tools)
| |–liblog (Log library)
| |–libmincrypt (Crypto library)
| |–libnetutils (Network Tools Library)
| |–libpixelflinger (Graphics processing Library)
| |–libsysutils (System Tools Library)
| |–libzipfile (Zip library)
| |–logcat (view log tool)
| |–logwrapper (log package tool)
| |–mkbootimg (tool box script to make startup boot.img)
| |–netcfg (Network configuration netcfg Source code)
| |–nexus (code for Google's newest phone)
| |–rootdir (Rootfs, including some scripts and configurations under etc)
| |–sh (Shell code)
| |–toolbox (Toolbox, tool set similar to BusyBox)
|-- vold （SD卡管理器） 
|-- extras （额外工具） 
| |-- latencytop （a tool for software developers ，identifying system latency happen） 
| |-- libpagemap （pagemap库） 
| |-- librank （Java Library Ranking System库） 
| |-- procmem （pagemap相关） 
| |-- procrank （Java Library Ranking System相关） 
| |-- showmap （showmap工具） 
| |-- showslab （showslab工具） 
| |-- sound （声音相关） 
| |-- su （su命令源码） 
| |-- tests （一些测试工具） 
|–timeinfo (time zone related)
-- wlan （无线相关） 
–ti (TI network card related tools and libraries)

Vendor catalogue (manufacturer custom content)

|–aosp (Android Open source project)
| -- products （一些板级规则） 
|-- htc （HTC公司） 
| |-- common-open （通用部分） 
| |–AKMD (Tool for unpacking img)
| |–dream-open (G1 open section)
| |–prebuilt-open (pre-compiled open section)
| -- sapphire-open （sapphire这款型号开放内容） 
|-- pv-open （没东西） 
|-- qcom （里面基本是空的） 
–sample (sample provided by Google)
|–apps (Application)
| |–client (User)
| -- upgrade （升级） 
|-- frameworks （框架） 
|–platformlibrary (Platform library)
|–products (product)
|–sdk_addon (SDK additions section)
-- skins （皮肤） 
–WVGAMEDDPI (WVGA applicable picture)

12.Android Source directory structure detailed (GO)