Android 2.1 source code structure analysis

For Android 2.1

| -- Makefile

| -- Bionic (bionic C Library)

| -- Bootable (startup guide code)

| -- Build (stores basic development kit configurations such as system compilation rules and generic)

| -- Cts (Android compatibility test suite Standard)

| -- Dalvik (dalvik Java Virtual Machine)

| -- Development (related to application development)

| -- External (some open-source modules used by android)

| -- Frameworks (core framework -- java and C ++ language)

| -- Hardware (mainly protects the HAL code of the hardware adapter layer)

| -- Out (the code output after compilation is in this directory)

| -- Packages (Application Package)

| -- Prebuilt (resources pre-compiled in x86 and arm architectures)

| -- Sdk (sdk and simulator)

| -- System (File system Library, application, and component-C language)

'-- Vendor (vendor-defined code)

The bionic directory expands tree-d-L 2 by Level 2.

| -- Libc (C Library)

| -- Arch-arm (ARM architecture, including system call Assembly implementation)

| -- Arch-x86 (x86 architecture, including system call Assembly implementation)

| -- Bionic (functions implemented by C, architecture independent)

| -- Docs (document)

| -- Include (header file)

| -- Inet (? Inet problems. The specific role is unknown)

| -- Kernel (some header files in Linux kernel)

| -- Netbsd (? Nesbsd system related, specific role unknown)

| -- Private (? Some private header files)

| -- Stdio (stdio implementation)

| -- Stdlib (implemented by stdlib)

| -- String (string function implementation)

| -- Tools (several tools)

| -- Tzcode (Time Zone related code)

| -- Unistd (unistd implementation)

| '-- Zoneinfo (Time Zone Information)

| -- Libdl (implemented by libdl. dl is a dynamic link and provides the function of accessing the Dynamic Link Library)

| -- Libm (implementation of libm mathematical library ,)

| -- Alpha (apaha Architecture)

| -- Amd64 (amd64 Architecture)

| -- Arm (arm architecture)

| -- Bsdsrc (? Bsd source code)

| -- I386 (i386 architecture)

| -- I387 (i387 architecture ?)

| -- Ia64 (ia64 Architecture)

| -- Include (header file)

| -- Man (mathematical function, suffixed with. 3, some library files for freeBSD)

| -- Powerpc (powerpc architecture)

| -- Sparc64 (sparc64 Architecture)

| '-- Src (source code)

| -- Libstdc ++ (libstdc ++ C ++ implementation Library)

| -- Include (header file)

| '-- Src (source code)

| -- Libthread_db (multi-threaded program debugger Library)

| '-- Include (header file)

'-- Linker (dynamic linker)

'-- Arch (supports arm and x86 architectures)

Hardware directory (some manufacturers provide open-source hardware solution Adaptation Layer HAL code)

| -- Broadcom (broadcom)

| '-- Wlan (Wireless Network Card)

| -- Libhardware (hardware Library)

| -- Include (header file)

| '-- Modules (Default (and possibly architecture dependents) HAL modules)

| -- Gralloc (gralloc display related)

| '-- Overlay (Skeleton for the "overlay" HAL module .)

| -- Libhardware_legacy (old hardware Library)

| -- Flashlight (backlight)

| -- Gps)

| -- Include (header file)

| -- Mount (old loader)

| -- Power)

| -- Qemu (simulator)

| -- Qemu_tracing (simulator tracking)

| -- Tests (test)

| -- Uevent (uevent)

| -- Vibrator (vibration)

| '-- Wifi (Wireless)

| -- Msm7k (Qualcomm 7k processor open source abstraction layer)

| -- Boot)

| -- Libaudio (audio and audio database)

| -- Libaudio-qsd8k (qsd8k sound-related Library)

| -- Libcamera (CAMERA Library)

| -- Libcopybit (copybit Library)

| -- Libgralloc (gralloc Library)

| -- Libgralloc-qsd8k (qsd8k gralloc Library)

| -- Liblights (backlight Library)

| '-- Librpc (RPC Library)

| -- Ril (Radio abstraction layer)

| -- Include (header file)

| -- Libril (database)

| -- Reference-cdma-sms (cdma sms reference)

| -- Reference-ril (ril reference)

| '-- Rild (ril Background Service Program)

'-- Ti (open-source hal of ti)

| -- Omap3 (omap3 processor)

| -- Dspbridge (DSP Bridge)

| -- Libopencorehw (opencore hardware Library)

| -- Liboverlay (overlay hardware Library)

| -- Libstagefrighthw (stagefright hardware Library)

| '-- Omx (omx component)

'-- Wlan (Wireless Network Card)

Prebuilt directory (resources pre-compiled in x86 and arm architectures)

.

| -- Android-arm (related to arm-android)

| -- Gdbserver (gdb debugger)

| '-- Kernel (simulated arm kernel)

| -- Android-x86 (x86-android related)

| '-- Kernel (null)

| -- Common (common compiled code, which should be java)

| -- Darwin-x86 (drawin x86 Platform)

| '-- Toolchain)

| -- 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 (tool chain, which should be used mainly)

| -- Arm-eabi-4.2.1

| -- Arm-eabi-4.3.1

| -- Arm-eabi-4.4.0

| '-- I686-unknown-linux-gnu-4.2.1 (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)

| -- Core (system core tool box Interface)

| -- Adb (adb debugging tool)

| -- Cpio (cpio tool, create img)

| -- Debugadh (debugging tool)

| -- Fastboot (Quick Start)

| -- Include (system interface header file)

| -- Init (init program source code)

| -- Libacc (lightweight C compiler)

| -- Libctest (libc test related)

| -- Libcutils (libc tool)

| -- Liblog (log Library)

| -- Libmincrypt (encrypted Library)

| -- Libnetutils (network tool Library)

| -- Libpixelflinger (graphics processing Library)

| -- Libsysutils (System Tool Library)

| -- Libzipfile (zip Library)

| -- Logcat (view log tool)

| -- Logwrapper (log encapsulation tool)

| -- Mkbootimg (create a tool box script to start boot. img)

| -- Netcfg (network configuration netcfg source code)

| -- Nexus (Code of google's latest mobile phone)

| -- Rootdir (rootfs, including scripts and configurations under etc)

| -- Sh (shell code)

| -- Toolbox (toolbox, similar to the tool set of busybox)

| '-- Vold (SD card Manager)

| -- Extras (additional tool)

| -- Latencytop (a tool for software developers, identifying system latency happen)

| -- Libpagemap (pagemap Library)

| -- Librank (Java Library Ranking System Library)

| -- Procmem (pagemap related)

| -- Procrank (related to Java Library Ranking System)

| -- Showmap (showmap tool)

| -- Showslab (showslab tool)

| -- Sound (sound-related)

| -- Su (su command source code)

| -- Tests (some test tools)

| '-- Timeinfo (Time Zone related)

'-- Wlan (Wireless)

'-- Ti (ti Nic related tools and libraries)