Android OS detailed directory structure
\system\app
The main store in this is the regular download of the application, you can see the APK format is the end of the file. Under this folder the program for the system default components, the software installed by itself will not appear here, but in the \data\ folder. The following is a detailed description:
\system\app\alarmclock.apk Alarm Clock
\system\app\alarmclock.odex
\system\app\browser.apk Browser
\system\app\browser.odex
\SYSTEM\APP\BUGREPORT.APK Bug Report
\system\app\bugreport.odex
\system\app\calculator.apk Calculator
\system\app\calculator.odex
\SYSTEM\APP\CALENDAR.APK Calendar
\system\app\calendar.odex
\SYSTEM\APP\CALENDARPROVIDER.APK Calendar Offers
\system\app\calendarprovider.odex
\system\app\camera.apk camera
\system\app\camera.odex
\system\app\com.amazon.mp3.apk Amazon Music
\SYSTEM\APP\CONTACTS.APK Contact
\system\app\contacts.odex
\system\app\downloadprovider.apk Download Offers
\system\app\downloadprovider.odex
\system\app\drmprovider.apk DRM Digital Copyright offers
\system\app\drmprovider.odex
\system\app\email.apk e-mail client
\system\app\email.odex
\SYSTEM\APP\FIELDTEST.APK Test procedure
\system\app\fieldtest.odex
\SYSTEM\APP\GDATAFEEDSPROVIDER.APK Googledata Offers
\system\app\gdatafeedsprovider.odex
\system\app\gmail.apk Gmail Email
\system\app\gmail.odex
\SYSTEM\APP\GMAILPROVIDER.APK Gmail offers
\system\app\gmailprovider.odex
\system\app\googleapps.apk Google Package
\system\app\googleapps.odex
\SYSTEM\APP\GOOGLESEARCH.APK Search Tool
\system\app\googlesearch.odex
\system\app\gtalkservice.apk gtalk Service
\system\app\gtalkservice.odex
\system\app\htmlviewer.apk HTML Viewer
\system\app\htmlviewer.odex
\system\app\im.apk even if the communication component contains MSN, Yahoo
\system\app\imcredentialprovider.apk
\system\app\improvider.apk
\system\app\improvider.odex
\SYSTEM\APP\LAUNCHER.APK boot Loader
\system\app\launcher.odex
\SYSTEM\APP\MAPS.APK Electronic Map
\system\app\maps.odex
\SYSTEM\APP\MEDIAPROVIDER.APK Multimedia Playback Offers
\system\app\mediaprovider.odex
\system\app\mms.apk SMS, MMS
\system\app\mms.odex
\system\app\music.apk Music Player
\system\app\music.odex
\system\app\myfaves.apk t-mobile myfaves Program
\system\app\myfaves.odex
\system\app\packageinstaller.apk APK Installer
\system\app\packageinstaller.odex
\SYSTEM\APP\PHONE.APK Telephone Dialer
\system\app\phone.odex
\system\app\settings.apk system settings
\system\app\settings.odex
\SYSTEM\APP\SETTINGSPROVIDER.APK settings provide
\system\app\settingsprovider.odex
\SYSTEM\APP\SETUPWIZARD.APK Setup Wizard
\system\app\setupwizard.odex
\SYSTEM\APP\SOUNDRECORDER.APK Recording Tools
\system\app\soundrecorder.odex
\SYSTEM\APP\STREET.APK Street Map
\system\app\street.odex
\SYSTEM\APP\SYNC.APK Synchronization Program
\system\app\sync.odex
\SYSTEM\APP\TALK.APK Voice Program
\system\app\talk.odex
\SYSTEM\APP\TELEPHONYPROVIDER.APK Telephone Offers
\system\app\telephonyprovider.odex
\SYSTEM\APP\UPDATER.APK Update Program
\system\app\updater.odex
\system\app\vending.apk Manufacturer Information
\system\app\vending.odex
\SYSTEM\APP\VOICEDIALER.APK Voice Dialer
\system\app\voicedialer.odex
\system\app\youtube.apk YouTube Videos
\system\app\youtube.odex
\system\bin
This directory of files are the system's local program, from the Bin folder name can be seen binary binary program, which is mainly the Linux system comes with components, Android mobile phone network on the main file to do a simple analysis of the introduction:
\system\bin\akmd
\system\bin\am
\system\bin\app_process System Process
\SYSTEM\BIN\DALVIKVM Dalvik Virtual Machine Host
\system\bin\dbus-daemon System bus Monitoring
\system\bin\debuggerd Debugger
\system\bin\debug_tool Debugging Tools
\system\bin\dexopt Dex Options
\SYSTEM\BIN\DHCPCD DHCP server
\system\bin\dumpstate State Grabber
\system\bin\dumpsys System Gripper
\system\bin\dvz
\system\bin\fillup
\system\bin\flash_image Flash Image
\system\bin\hciattach
\system\bin\hcid Hcid Core
\system\bin\hostapd
\system\bin\hostapd_cli
\system\bin\htclogkernel
\system\bin\input
\system\bin\installd
\system\bin\itr
\system\bin\linker
\system\bin\logcat logcat Log Printing
\system\bin\logwrapper
\system\bin\mediaserver
\system\bin\monkey
\SYSTEM\BIN\MOUNTD Storage Mount
\SYSTEM\BIN\NETCFG Network Settings
\system\bin\ping Ping Program
\system\bin\playmp3 MP3 Player
\SYSTEM\BIN\PM Package Manager
\system\bin\qemud QEMU Virtual Machine
\system\bin\radiooptions Wireless Options
\system\bin\rild RIL Components
\system\bin\sdptool
\system\bin\sdutil
\system\bin\service
\system\bin\servicemanager Service Manager
\system\bin\sh
\system\bin\ssltest SSL Test
\system\bin\surfaceflinger Touch Sensing Drive
\SYSTEM\BIN\SVC Service
\system\bin\system_server
\SYSTEM\BIN\TELNETD Telnet Component
\system\bin\toolbox
\system\bin\wlan_loader
\system\bin\wpa_cli
\system\bin\wpa_supplicant
\system\etc
From the folder name, the system configuration files, such as the APN access point settings and other core configurations are saved.
\system\etc\apns-conf.xml APN Access Point configuration file
\system\etc\audiofilter.csv Audio Filter configuration file
\system\etc\audiopara4.csv
\system\etc\bookmarks.xml Bookmark Database
\SYSTEM\ETC\DBUS.CONF Bus Monitoring configuration file
\system\etc\dhcpcd
\system\etc\event-log-tags
\system\etc\favorites.xml Favorite Folders
\system\etc\firmware Firmware Information
\system\etc\gps.conf GPS Settings File
\system\etc\hcid.conf Kernel hcid configuration file
\system\etc\hosts Network DNS Cache
\system\etc\init.goldfish.sh
\system\etc\location Positioning related
\system\etc\mountd.conf Storage Mount configuration file
\system\etc\notice.html Tips Page
\system\etc\permissions.xml Permissions License
\system\etc\pvplayer.conf
\system\etc\security
\system\etc\wifi WLAN related components
\system\etc\dhcpcd\dhcpcd-hooks
\system\etc\dhcpcd\dhcpcd-run-hooks
\system\etc\dhcpcd\dhcpcd.conf
\system\etc\dhcpcd\dhcpcd-hooks\01-test
\system\etc\dhcpcd\dhcpcd-hooks\20-dns.conf
\system\etc\dhcpcd\dhcpcd-hooks\95-configured
\system\etc\firmware\brf6300.bin
\system\etc\location\gps
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\system\etc\location\gps\location Positioning related
\system\etc\location\gps\nmea GPS Data Analysis
\system\etc\location\gps\properties
\system\etc\security\cacerts.bks
\system\etc\security\otacerts.zip OTA Download Verification
\system\etc\wifi\fw1251r1c.bin
\system\etc\wifi\tiwlan.ini
\system\etc\wifi\wpa_supplicant.conf WPA Authentication Component
\system\fonts
Font folder, in addition to the standard font and bold, italic can see the largest file volume may be the Chinese font, or some Unicode font, from T-mobile G1 can clearly see display Simplified Chinese normal, where Droidsansfallback.ttf file size
\system\fonts\droidsans-bold.ttf
\system\fonts\droidsans.ttf
\system\fonts\droidsansfallback.ttf
\system\fonts\droidsansmono.ttf
\system\fonts\droidserif-bold.ttf
\system\fonts\droidserif-bolditalic.ttf
\system\fonts\droidserif-italic.ttf
\system\fonts\droidserif-regular.ttf
\system\framework
The framework is primarily a core file, which can be seen as a system platform framework from the suffix name jar.
\system\framework\am.jar
\system\framework\am.odex
\system\framework\android.awt.jar AWT Library
\system\framework\android.awt.odex
\system\framework\android.policy.jar
\system\framework\android.policy.odex
\system\framework\android.test.runner.jar
\system\framework\android.test.runner.odex
\system\framework\com.google.android.gtalkservice.jar gtalk Service
\system\framework\com.google.android.gtalkservice.odex
\system\framework\com.google.android.maps.jar Electronic Map Gallery
\system\framework\com.google.android.maps.odex
\system\framework\core.jar Core Library, start the desktop when the first load this
\system\framework\core.odex
\system\framework\ext.jar
\system\framework\ext.odex
\system\framework\framework-res.apk
\system\framework\framework-tests.jar
\system\framework\framework-tests.odex
\system\framework\framework.jar
\system\framework\framework.odex
\system\framework\input.jar Input Storage
\system\framework\input.odex
\system\framework\itr.jar
\system\framework\itr.odex
\system\framework\monkey.jar
\system\framework\monkey.odex
\system\framework\pm.jar Package Management Library
\system\framework\pm.odex
\system\framework\services.jar
\system\framework\services.odex
\system\framework\ssltest.jar
\system\framework\ssltest.odex
\system\framework\svc.jar System Services
\system\framework\svc.odex
\system\lib
The Lib directory is primarily the underlying library of the system, such as the Platform Runtime Library.
\system\lib\libaes.so
\system\lib\libagl.so
\system\lib\libandroid_runtime.so Android Runtime Library
\system\lib\libandroid_servers.so System Service Components
\system\lib\libaudio.so Audio Processing
\system\lib\libaudioeq.so eq Equalizer
\system\lib\libaudioflinger.so Audio Filter
\system\lib\libbluetooth.so Bluetooth components
\system\lib\libc.so
\system\lib\libcamera.so Ultra Camera Assembly
\system\lib\libcameraservice.so
\system\lib\libcorecg.so
\system\lib\libcrypto.so Cryptographic Components
\system\lib\libctest.so
\system\lib\libcutils.so
\system\lib\libdbus.so
\system\lib\libdl.so
\system\lib\libdrm1.so DRM Parsing Library
\system\lib\libdrm1_jni.so
\system\lib\libdvm.so
\system\lib\libexif.so
\system\lib\libexpat.so
\system\lib\libfftem.so
\system\lib\libgles_cm.so
\system\lib\libgps.so
\system\lib\libhardware.so
\system\lib\libhgl.so
\system\lib\libhtc_ril.so
\system\lib\libicudata.so
\system\lib\libicui18n.so
\system\lib\libicuuc.so
\system\lib\liblog.so
\system\lib\libm.so
\system\lib\libmedia.so
\system\lib\libmediaplayerservice.so
\system\lib\libmedia_jni.so
\system\lib\libnativehelper.so
\system\lib\libnetutils.so
\system\lib\libomxcore.so
\system\lib\libomxh264dec.so
\system\lib\libpixelflinger.so
\system\lib\libpvasf.so
\system\lib\libpvasfreg.so
\system\lib\libpvauthor.so
\system\lib\libpvcommon.so
\system\lib\libpvdownload.so
\system\lib\libpvdownloadreg.so
\system\lib\libpvmp4.so
\system\lib\libpvmp4reg.so
\system\lib\libpvnet_support.so
\system\lib\libpvplayer.so
\system\lib\libpvrtsp.so
\system\lib\libpvrtspreg.so
\system\lib\libqcamera.so
\system\lib\libreference-ril.so
\system\lib\libril.so
\system\lib\librpc.so
\system\lib\libsgl.so
\system\lib\libsonivox.so
\system\lib\libsoundpool.so
\system\lib\libsqlite.so
\system\lib\libssl.so
\system\lib\libstdc++.so
\system\lib\libsurfaceflinger.so
\system\lib\libsystem_server.so
\system\lib\libthread_db.so
\system\lib\libuapi_jni.so
\system\lib\libui.so
\system\lib\libutils.so
\system\lib\libvorbisidec.so
\system\lib\libwbxml.so
\system\lib\libwbxml_jni.so
\system\lib\libwebcore.so
\system\lib\libwpa_client.so
\system\lib\libxml2wbxml.so
\system\lib\libz.so
\system\lib\modules
\system\lib\modules\wlan.ko
\system\media
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Ringtone Music folder, in addition to the regular ringtone, there are some system alert event tones
\system\media\audio
\system\media\audio\alarms Alarm Sound
\system\media\audio\notifications Cue tone
\system\media\audio\ringtones Ringtones
\system\media\audio\ui interface Operation Event Tone
\system\media\audio\alarms\alarm_beep_01.ogg
\system\media\audio\alarms\alarm_beep_02.ogg
\system\media\audio\alarms\alarm_beep_03.ogg
\system\media\audio\alarms\alarm_buzzer.ogg
\system\media\audio\alarms\alarm_classic.ogg
\system\media\audio\alarms\alarm_rooster_02.ogg
\system\media\audio\notifications\beat_box_android.ogg
\system\media\audio\notifications\caffeinesnake.ogg
\system\media\audio\notifications\deardeer.ogg
\system\media\audio\notifications\dontpanic.ogg
\system\media\audio\notifications\f1_missedcall.ogg
\system\media\audio\notifications\f1_new_mms.ogg
\system\media\audio\notifications\f1_new_sms.ogg
\system\media\audio\notifications\heaven.ogg
\system\media\audio\notifications\highwire.ogg
\system\media\audio\notifications\kzurbsonar.ogg
\system\media\audio\notifications\onthehunt.ogg
\system\media\audio\notifications\tada.ogg
\system\media\audio\notifications\tinkerbell.ogg
\system\media\audio\notifications\voila.ogg
\system\media\audio\ringtones\beatplucker.ogg
\system\media\audio\ringtones\bentleydubs.ogg
\system\media\audio\ringtones\birdloop.ogg
\system\media\audio\ringtones\caribbeanice.ogg
\system\media\audio\ringtones\crazydream.ogg
\system\media\audio\ringtones\curveball.ogg
\system\media\audio\ringtones\dreamtheme.ogg
\system\media\audio\ringtones\ethershake.ogg
\system\media\audio\ringtones\friendlyghost.ogg
\system\media\audio\ringtones\gameoverguitar.ogg
\system\media\audio\ringtones\growl.ogg
\system\media\audio\ringtones\insertcoin.ogg
\system\media\audio\ringtones\loopylounge.ogg
\system\media\audio\ringtones\loveflute.ogg
\system\media\audio\ringtones\mideviljaunt.ogg
\system\media\audio\ringtones\mildlyalarming.ogg
\system\media\audio\ringtones\newplayer.ogg
\system\media\audio\ringtones\noises1.ogg
\system\media\audio\ringtones\noises2.ogg
\system\media\audio\ringtones\noises3.ogg
\system\media\audio\ringtones\organdub.ogg
\system\media\audio\ringtones\ring_classic_02.ogg
\system\media\audio\ringtones\ring_digital_02.ogg
\system\media\audio\ringtones\ring_synth_02.ogg
\system\media\audio\ringtones\ring_synth_04.ogg
\system\media\audio\ringtones\romancingthetone.ogg
\system\media\audio\ringtones\sitarvssitar.ogg
\system\media\audio\ringtones\springyjalopy.ogg
\system\media\audio\ringtones\t-jingle.ogg
\system\media\audio\ringtones\terminated.ogg
\system\media\audio\ringtones\twirlaway.ogg
\system\media\audio\ringtones\veryalarmed.ogg
\system\media\audio\ringtones\world.ogg
\system\media\audio\ui\effect_tick.ogg
\system\sounds
The default music test file, which has only one Test.mid file, is used to play the test file.
\system\sounds\test.mid
\system\usr
User folders, including shares, keyboard layouts, time zone files, and so on.
\system\usr\keychars
\system\usr\keylayout
\system\usr\share
\system\usr\srec
\system\usr\keychars\qwerty.kcm.bin
\system\usr\keychars\qwerty2.kcm.bin
\system\usr\keychars\trout-keypad-qwertz.kcm.bin
\system\usr\keychars\trout-keypad-v2.kcm.bin
\system\usr\keychars\trout-keypad-v3.kcm.bin
\system\usr\keychars\trout-keypad.kcm.bin
\system\usr\keylayout\h2w_headset.kl
\system\usr\keylayout\qwerty.kl
\system\usr\keylayout\trout-keypad-qwertz.kl
\system\usr\keylayout\trout-keypad-v2.kl
\system\usr\keylayout\trout-keypad-v3.kl
\system\usr\keylayout\trout-keypad.kl
\system\usr\share\bsk
\system\usr\share\zoneinfo
\system\usr\share\bsk\v_fd_speed_101.bsk
\system\usr\share\bsk\v_fd_std_101.bsk
\system\usr\share\zoneinfo\zoneinfo.dat
\system\usr\share\zoneinfo\zoneinfo.idx
\system\usr\srec\config
\system\usr\srec\config\en.us
\system\usr\srec\config\en.us\baseline.par
\system\usr\srec\config\en.us\baseline11k.par
\system\usr\srec\config\en.us\baseline8k.par
\system\usr\srec\config\en.us\dictionary
\system\usr\srec\config\en.us\g2p
\system\usr\srec\config\en.us\grammars
\system\usr\srec\config\en.us\models
\system\usr\srec\config\en.us\dictionary\basic.ok
\system\usr\srec\config\en.us\dictionary\cmu6plus.ok.zip
\system\usr\srec\config\en.us\dictionary\enroll.ok
\system\usr\srec\config\en.us\g2p\en-us-ttp.data
\system\usr\srec\config\en.us\grammars\voicedialer.g2g
\system\usr\srec\config\en.us\models\generic.swiarb
\system\usr\srec\config\en.us\models\generic11.lda
\system\usr\srec\config\en.us\models\generic11_f.swimdl
\system\usr\srec\config\en.us\models\generic11_m.swimdl
\system\usr\srec\config\en.us\models\generic8.lda
\system\usr\srec\config\en.us\models\generic8_f.swimdl
\system\usr\srec\config\en.us\models\generic8_m.swimdl
The entire Android platform file is not so much, some files in the/data folder is the user folder, here is not introduced.
Directory of Android operating system
