1.Android源代码的目录中包含了Android系统所有的源代码，从底层驱动到上层应用，Android系统对所有文件都进行了详细管理；
2.而在手机中，Android系统的目录与源代码的目录并不是一一对应的，而是源代码编译之后，与打包生成的Image文件的结构相同；
3.了解这些目录的结构，对于认识整个Android系统有很好的帮助。
1.Android系统源代码目录
想要看完整个Android的源代码，需要懂C、懂脚本、懂Java、软硬兼通。所以一般情况下，我们了解源代码的框架结构，出了问题知道从哪里着手解决就可以了。这就好比图书管理员，他不一定要把所有的书都读一遍，但是只要有用到，他就可以很快地找到相应的资料。
这里是查看Android源代码的网站。其界如下：
每个目录都具有不同的功能和目的，整个结构关系图如下所示：
2.Android系统目录
在Android手机里，系统的目录结构与源代码目录结构还是有所不同的，我们通过ADB连接上手机，通过Linux的ls命令查看Android系统的根目录。其中/system和/data是开发者非常关心的两个目录。
/system/app/
这里面放的是一些系统的App：
root@vbox86p:/ # cd system/app
root@vbox86p:/system/app # ll
drwxr-xr-x root root 2018-02-15 14:40 BasicDreams
drwxr-xr-x root root 2018-02-15 14:40 Bluetooth
drwxr-xr-x root root 2018-02-15 14:47 Browser
drwxr-xr-x root root 2018-02-15 14:40 CMFileManager
drwxr-xr-x root root 2018-02-15 14:44 Calculator
drwxr-xr-x root root 2018-02-15 14:47 Calendar
drwxr-xr-x root root 2018-02-15 14:47 Camera2
drwxr-xr-x root root 2018-02-15 14:40 CaptivePortalLogin
drwxr-xr-x root root 2018-02-15 14:41 CertInstaller
drwxr-xr-x root root 2018-02-15 14:41 CubeLiveWallpapers
drwxr-xr-x root root 2018-02-15 14:41 CustomLocale
drwxr-xr-x root root 2018-02-15 14:46 DeskClock
drwxr-xr-x root root 2018-02-15 14:41 Development
drwxr-xr-x root root 2018-02-15 14:05 DevelopmentSettings
drwxr-xr-x root root 2018-02-15 14:45 DocumentsUI
drwxr-xr-x root root 2018-02-15 14:41 DownloadProviderUi
drwxr-xr-x root root 2018-02-15 14:48 Email
drwxr-xr-x root root 2018-02-15 14:47 Exchange2
drwxr-xr-x root root 2018-02-15 14:41 Galaxy4
drwxr-xr-x root root 2018-02-15 14:47 Gallery2
drwxr-xr-x root root 2018-02-15 14:42 GenydService
drwxr-xr-x root root 2018-02-15 14:41 GenymotionLayout
drwxr-xr-x root root 2018-02-15 14:41 HTMLViewer
drwxr-xr-x root root 2018-02-15 14:41 HoloSpiralWallpaper
drwxr-xr-x root root 2018-02-15 14:41 KeyChain
drwxr-xr-x root root 2018-02-15 14:47 LatinIME
drwxr-xr-x root root 2018-02-15 14:46 Launcher3
drwxr-xr-x root root 2018-02-15 14:41 LiveWallpapers
drwxr-xr-x root root 2018-02-15 14:41 LiveWallpapersPicker
drwxr-xr-x root root 2018-02-15 14:42 Music
drwxr-xr-x root root 2018-02-15 14:41 NoiseField
drwxr-xr-x root root 2018-02-15 14:41 OpenWnn
drwxr-xr-x root root 2018-02-15 14:41 PacProcessor
drwxr-xr-x root root 2018-02-15 14:44 PackageInstaller
drwxr-xr-x root root 2018-02-15 14:41 PhaseBeam
drwxr-xr-x root root 2018-02-15 14:41 PhotoTable
drwxr-xr-x root root 2018-02-15 14:41 PicoTts
drwxr-xr-x root root 2018-02-15 14:45 PrintSpooler
drwxr-xr-x root root 2018-02-15 14:41 Provision
drwxr-xr-x root root 2018-02-15 14:42 QuickSearchBox
drwxr-xr-x root root 2018-02-15 14:40 SoundRecorder
drwxr-xr-x root root 2018-02-15 14:44 Superuser
drwxr-xr-x root root 2018-02-15 14:41 UserDictionaryProvider
drwxr-xr-x root root 2018-02-15 14:41 VisualizationWallpapers
drwxr-xr-x root root 2018-02-15 14:41 WAPPushManager
drwxr-xr-x root root 2018-02-15 14:42 webview
root@vbox86p:/system/app #
/system/bin/
这里面放的主要是Linux自带的组件：
/system/build.prop
这里记录的是系统的属性信息（注意是cat build.prop 查看）：
2|root@vbox86p:/system # cat build.prop
# begin build properties
# autogenerated by buildinfo.sh
ro.build.id=LRX21M
ro.build.version.incremental=17
ro.build.version.sdk=21
ro.build.version.codename=REL
ro.build.version.all_codenames=REL
ro.build.version.release=5.0
ro.build.date=Thu Feb 15 18:31:12 UTC 2018
ro.build.date.utc=1518719472
ro.build.user=genymotion
ro.build.host=f1b5df862109
# ro.product.cpu.abi and ro.product.cpu.abi2 are obsolete,
# use ro.product.cpu.abilist instead.
ro.product.cpu.abi=x86
ro.product.cpu.abilist64=
ro.product.locale.language=en
ro.product.locale.region=US
ro.wifi.channels=
ro.board.platform=
# ro.build.product is obsolete; use ro.product.device
ro.build.product=vbox86p
# Do not try to parse description, fingerprint, or thumbprint
ro.build.description=vbox86p-userdebug 5.0 LRX21M 17 test-keys
# end build properties
#
# from device/genymotion/vbox86p/system.prop
#
#
# system.prop for Genymotion
#
# Build informations
# Disable opengl Zygote preloading to avoid opengl problems
ro.zygote.disable_gl_preload=true
rild.libpath=/system/lib/libreference-ril.so
dalvik.vm.heapsize=256m
persist.service.adb.enable=1
# Allow root adbd
service.adb.root=1
ro.opengles.version=131072
ro.bq.gpu_to_cpu_unsupported=1
ro.genymotion.version=2.12.0
# Add device version
ro.genymotion.device.version=1
#
# Capabilities
#
# Battery sensor
ro.genyd.caps.bat=on
# GPS sensor
ro.genyd.caps.gps=on
# Accelerometer sensor
ro.genyd.caps.acc=on
# Webcam / camera sensor
ro.genyd.caps.cam=on
# Screencast / screenshot capability
ro.genyd.caps.scr=on
# Remote controller capability
ro.genyd.caps.rmt=on
# DeviceID / IMEI and AndroidID emulation
ro.genyd.caps.did=on
# Network control capability
ro.genyd.caps.net=on
# Disk IO throttling capability
ro.genyd.caps.diskio=on
......
/system/fonts/
系统字体存放目录，root后可下载TTF格式字体替换原字体，达到修改系统字体的效果：
127|root@vbox86p:/system/bin # cd ..
root@vbox86p:/system # cd fonts
root@vbox86p:/system/fonts # ll
-rw-r--r-- root root 4540 2018-02-15 13:57 AndroidClock.ttf
-rw-r--r-- root root 4464 2018-02-15 13:57 AndroidClock_Highlight.ttf
-rw-r--r-- root root 4464 2018-02-15 13:57 AndroidClock_Solid.ttf
-rw-r--r-- root root 40308 2018-02-15 13:57 CarroisGothicSC-Regular.ttf
-rw-r--r-- root root 6564 2018-02-15 13:57 Clockopia.ttf
-rw-r--r-- root root 59136 2018-02-15 13:57 ComingSoon.ttf
-rw-r--r-- root root 69180 2018-02-15 13:57 CutiveMono.ttf
-rw-r--r-- root root 115568 2018-02-15 13:57 DancingScript-Bold.ttf
-rw-r--r-- root root 116580 2018-02-15 13:57 DancingScript-Regular.ttf
lrw-r--r-- root root 2018-02-15 13:59 DroidSans-Bold.ttf -> Roboto-Bold.ttf
lrw-r--r-- root root 2018-02-15 13:59 DroidSans.ttf -> Roboto-Regular.ttf
-rw-r--r-- root root 4033420 2018-02-15 13:57 DroidSansFallback.ttf
-rw-r--r-- root root 108128 2018-02-15 14:00 DroidSansMono.ttf
-rw-r--r-- root root 2558716 2018-02-15 13:57 MTLmr3m.ttf
-rw-r--r-- root root 1289100 2018-02-15 13:57 NanumGothic.ttf
-rw-r--r-- root root 1384488 2018-02-15 13:57 NotoColorEmoji.ttf
-rw-r--r-- root root 114612 2018-02-15 13:57 NotoNaskh-Bold.ttf
-rw-r--r-- root root 115540 2018-02-15 13:57 NotoNaskh-Regular.ttf
-rw-r--r-- root root 114596 2018-02-15 13:57 NotoNaskhUI-Bold.ttf
-rw-r--r-- root root 115700 2018-02-15 13:57 NotoNaskhUI-Regular.ttf
-rw-r--r-- root root 14152 2018-02-15 13:57 NotoSansArmenian-Bold.ttf
-rw-r--r-- root root 14324 2018-02-15 13:57 NotoSansArmenian-Regular.ttf
-rw-r--r-- root root 98100 2018-02-15 13:57 NotoSansBengali-Bold.ttf
-rw-r--r-- root root 101308 2018-02-15 13:57 NotoSansBengali-Regular.ttf
-rw-r--r-- root root 103532 2018-02-15 13:57 NotoSansBengaliUI-Bold.ttf
-rw-r--r-- root root 106640 2018-02-15 13:57 NotoSansBengaliUI-Regular.ttf
-rw-r--r-- root root 119664 2018-02-15 13:57 NotoSansDevanagari-Bold.ttf
-rw-r--r-- root root 123740 2018-02-15 13:57 NotoSansDevanagari-Regular.ttf
-rw-r--r-- root root 114168 2018-02-15 13:57 NotoSansDevanagariUI-Bold.ttf
-rw-r--r-- root root 119200 2018-02-15 13:57 NotoSansDevanagariUI-Regular.ttf
-rw-r--r-- root root 142968 2018-02-15 13:57 NotoSansEthiopic-Bold.ttf
-rw-r--r-- root root 142832 2018-02-15 13:57 NotoSansEthiopic-Regular.ttf
-rw-r--r-- root root 19636 2018-02-15 13:57 NotoSansGeorgian-Bold.ttf
-rw-r--r-- root root 19684 2018-02-15 13:57 NotoSansGeorgian-Regular.ttf
-rw-r--r-- root root 16636 2018-02-15 13:57 NotoSansHebrew-Bold.ttf
-rw-r--r-- root root 16456 2018-02-15 13:57 NotoSansHebrew-Regular.ttf
-rw-r--r-- root root 80016 2018-02-15 13:57 NotoSansKannada-Bold.ttf
-rw-r--r-- root root 81392 2018-02-15 13:57 NotoSansKannada-Regular.ttf
-rw-r--r-- root root 79136 2018-02-15 13:57 NotoSansKannadaUI-Bold.ttf
-rw-r--r-- root root 80644 2018-02-15 13:57 NotoSansKannadaUI-Regular.ttf
-rw-r--r-- root root 33620 2018-02-15 13:57 NotoSansKhmer-Bold.ttf
-rw-r--r-- root root 34612 2018-02-15 13:57 NotoSansKhmer-Regular.ttf
-rw-r--r-- root root 36456 2018-02-15 13:57 NotoSansKhmerUI-Bold.ttf
-rw-r--r-- root root 38160 2018-02-15 13:57 NotoSansKhmerUI-Regular.ttf
-rw-r--r-- root root 29004 2018-02-15 13:57 NotoSansLao-Bold.ttf
-rw-r--r-- root root 30352 2018-02-15 13:57 NotoSansLao-Regular.ttf
-rw-r--r-- root root 29064 2018-02-15 13:57 NotoSansLaoUI-Bold.ttf
-rw-r--r-- root root 30372 2018-02-15 13:57 NotoSansLaoUI-Regular.ttf
-rw-r--r-- root root 56740 2018-02-15 13:57 NotoSansMalayalam-Bold.ttf
-rw-r--r-- root root 56864 2018-02-15 13:57 NotoSansMalayalam-Regular.ttf
-rw-r--r-- root root 61124 2018-02-15 13:57 NotoSansMalayalamUI-Bold.ttf
-rw-r--r-- root root 61360 2018-02-15 13:57 NotoSansMalayalamUI-Regular.ttf
-rw-r--r-- root root 104692 2018-02-15 13:57 NotoSansMyanmar-Bold.ttf
-rw-r--r-- root root 107640 2018-02-15 13:57 NotoSansMyanmar-Regular.ttf
-rw-r--r-- root root 94696 2018-02-15 13:57 NotoSansMyanmarUI-Bold.ttf
-rw-r--r-- root root 94188 2018-02-15 13:57 NotoSansMyanmarUI-Regular.ttf
-rw-r--r-- root root 133624 2018-02-15 13:57 NotoSansSymbols-Regular-Subsetted.ttf
-rw-r--r-- root root 33096 2018-02-15 13:57 NotoSansTamil-Bold.ttf
-rw-r--r-- root root 32980 2018-02-15 13:57 NotoSansTamil-Regular.ttf
-rw-r--r-- root root 33548 2018-02-15 13:57 NotoSansTamilUI-Bold.ttf
-rw-r--r-- root root 33412 2018-02-15 13:57 NotoSansTamilUI-Regular.ttf
-rw-r--r-- root root 109936 2018-02-15 13:57 NotoSansTelugu-Bold.ttf
-rw-r--r-- root root 110176 2018-02-15 13:57 NotoSansTelugu-Regular.ttf
-rw-r--r-- root root 110240 2018-02-15 13:57 NotoSansTeluguUI-Bold.ttf
-rw-r--r-- root root 110644 2018-02-15 13:57 NotoSansTeluguUI-Regular.ttf
-rw-r--r-- root root 17484 2018-02-15 13:57 NotoSansThai-Bold.ttf
-rw-r--r-- root root 20536 2018-02-15 13:57 NotoSansThai-Regular.ttf
-rw-r--r-- root root 18156 2018-02-15 13:57 NotoSansThaiUI-Bold.ttf
-rw-r--r-- root root 21160 2018-02-15 13:57 NotoSansThaiUI-Regular.ttf
-rw-r--r-- root root 246688 2018-02-15 13:57 NotoSerif-Bold.ttf
-rw-r--r-- root root 261772 2018-02-15 13:57 NotoSerif-BoldItalic.ttf
-rw-r--r-- root root 248644 2018-02-15 13:57 NotoSerif-Italic.ttf
-rw-r--r-- root root 245788 2018-02-15 13:57 NotoSerif-Regular.ttf
-rw-r--r-- root root 242172 2018-02-15 13:57 Roboto-Black.ttf
-rw-r--r-- root root 263976 2018-02-15 13:57 Roboto-BlackItalic.ttf
-rw-r--r-- root root 242304 2018-02-15 13:57 Roboto-Bold.ttf
-rw-r--r-- root root 264068 2018-02-15 13:57 Roboto-BoldItalic.ttf
-rw-r--r-- root root 263056 2018-02-15 13:57 Roboto-Italic.ttf
-rw-r--r-- root root 243788 2018-02-15 13:57 Roboto-Light.ttf
-rw-r--r-- root root 266080 2018-02-15 13:57 Roboto-LightItalic.ttf
-rw-r--r-- root root 241640 2018-02-15 13:57 Roboto-Medium.ttf
-rw-r--r-- root root 263548 2018-02-15 13:57 Roboto-MediumItalic.ttf
-rw-r--r-- root root 241008 2018-02-15 13:57 Roboto-Regular.ttf
-rw-r--r-- root root 246428 2018-02-15 13:57 Roboto-Thin.ttf
-rw-r--r-- root root 267068 2018-02-15 13:57 Roboto-ThinItalic.ttf
-rw-r--r-- root root 239596 2018-02-15 13:57 RobotoCondensed-Bold.ttf
-rw-r--r-- root root 261660 2018-02-15 13:57 RobotoCondensed-BoldItalic.ttf
-rw-r--r-- root root 261992 2018-02-15 13:57 RobotoCondensed-Italic.ttf
-rw-r--r-- root root 240820 2018-02-15 13:57 RobotoCondensed-Light.ttf
-rw-r--r-- root root 264500 2018-02-15 13:57 RobotoCondensed-LightItalic.ttf
-rw-r--r-- root root 238804 2018-02-15 13:57 RobotoCondensed-Regular.ttf
root@vbox86p:/system/fonts #
/system/framework/
系统的核心文件、框架层：
2|root@vbox86p:/system # cd framework
root@vbox86p:/system/framework # ll
-rw-r--r-- root root 310 2018-02-15 14:36 am.jar
-rw-r--r-- root root 310 2018-02-15 14:35 android.policy.jar
-rw-r--r-- root root 310 2018-02-15 14:35 android.test.runner.jar
-rw-r--r-- root root 17816 2018-02-15 14:20 apache-xml.jar
-rw-r--r-- root root 310 2018-02-15 14:36 appops.jar
-rw-r--r-- root root 310 2018-02-15 14:36 appwidget.jar
-rw-r--r-- root root 310 2018-02-15 14:36 bmgr.jar
-rw-r--r-- root root 310 2018-02-15 14:22 bouncycastle.jar
-rw-r--r-- root root 310 2018-02-15 14:36 bu.jar
-rw-r--r-- root root 310 2018-02-15 14:36 com.android.future.usb.accessory.jar
-rw-r--r-- root root 310 2018-02-15 14:36 com.android.location.provider.jar
-rw-r--r-- root root 310 2018-02-15 14:36 com.android.media.remotedisplay.jar
-rw-r--r-- root root 310 2018-02-15 14:36 com.android.mediadrm.signer.jar
-rw-r--r-- root root 310 2018-02-15 14:22 conscrypt.jar
-rw-r--r-- root root 310 2018-02-15 14:36 content.jar
-rw-r--r-- root root 310 2018-02-15 14:06 core-junit.jar
-rw-r--r-- root root 1258999 2018-02-15 14:05 core-libart.jar
-rw-r--r-- root root 310 2018-02-15 14:36 dpm.jar
-rw-r--r-- root root 310 2018-02-15 14:38 ethernet-service.jar
-rw-r--r-- root root 1570569 2018-02-15 14:20 ext.jar
-rw-r--r-- root root 23569550 2018-02-15 14:06 framework-res.apk
-rw-r--r-- root root 19887 2018-02-15 14:35 framework.jar
-rw-r--r-- root root 310 2018-02-15 14:36 ime.jar
-rw-r--r-- root root 310 2018-02-15 14:36 ims-common.jar
-rw-r--r-- root root 310 2018-02-15 14:36 input.jar
-rw-r--r-- root root 310 2018-02-15 14:36 javax.obex.jar
-rw-r--r-- root root 310 2018-02-15 14:36 media_cmd.jar
-rw-r--r-- root root 310 2018-02-15 14:36 mms-common.jar
-rw-r--r-- root root 310 2018-02-15 14:36 monkey.jar
-rw-r--r-- root root 310 2018-02-15 14:22 okhttp.jar
-rw-r--r-- root root 310 2018-02-15 14:36 pm.jar
-rw-r--r-- root root 310 2018-02-15 14:36 requestsync.jar
-rw-r--r-- root root 310 2018-02-15 14:39 services.jar
-rw-r--r-- root root 310 2018-02-15 14:36 settings.jar
-rw-r--r-- root root 310 2018-02-15 14:36 svc.jar
-rw-r--r-- root root 310 2018-02-15 14:37 telephony-common.jar
-rw-r--r-- root root 310 2018-02-15 14:36 uiautomator.jar
-rw-r--r-- root root 310 2018-02-15 14:36 voip-common.jar
-rw-r--r-- root root 310 2018-02-15 14:41 wifi-service.jar
-rw-r--r-- root root 310 2018-02-15 14:36 wm.jar
drwxr-xr-x root root 2018-02-15 14:41 x86
/system/lib/
存放几乎所有的共享库(.so)文件：
/system/media/
该目录用来保存系统提示音、系统铃声：
root@vbox86p:/system # cd media
root@vbox86p:/system/media # ll
drwxr-xr-x root root 2018-02-15 13:49 audio
其中/system/media/audio/目录，这里面保存着Android系统的默认的铃声，alarms目录是闹铃提醒，notification目录是短信或提示音，ringtones目录是来电铃声，而ui目录则是一些界面音效：
/system/usr/
该目录用来保存用户的配置文件，如键盘布局、共享、时区文件等：
root@vbox86p:/system/media/audio # cd ../..
root@vbox86p:/system # cd usr
root@vbox86p:/system/usr # ll
drwxr-xr-x root root 2018-02-15 13:54 icu
drwxr-xr-x root root 2018-02-15 13:49 idc
drwxr-xr-x root root 2018-02-15 13:49 keychars
drwxr-xr-x root root 2018-02-15 13:49 keylayout
drwxr-xr-x root root 2018-02-15 13:52 share
drwxr-xr-x root root 2018-02-15 13:49 srec
root@vbox86p:/system/usr #
/data/app/
data目录包含了用户的大部分数据信息。其中，/data/app/这个目录包含了用户安装的App或者升级的App：
root@vbox86p:/system/usr # cd ../../data/app
root@vbox86p:/data/app # ll
drwxrwx--x system system 2018-03-24 05:27 ApiDemos
drwxrwx--x system system 2018-03-24 05:27 GestureBuilder
drwxr-xr-x system system 2018-07-13 13:13 andy.ham-2
drwxr-xr-x system system 2018-05-15 10:46 com.example.broadcast-2
drwxr-xr-x system system 2018-04-14 09:58 com.example.broadcastbestpractice-1
drwxr-xr-x system system 2018-06-11 12:37 com.example.daoexample-2
drwxr-xr-x system system 2018-04-30 12:57 com.example.databasetest-1
drwxr-xr-x system system 2018-04-14 07:24 com.example.filepersistencetest-1
drwxr-xr-x system system 2018-06-07 09:44 com.example.greendaotest-1
drwxr-xr-x system system 2018-07-27 10:23 com.example.helloworld-1
drwxr-xr-x system system 2018-03-24 14:57 com.example.listviewforthepredictor-1
drwxr-xr-x system system 2018-06-07 14:55 com.example.litepaltest-2
drwxr-xr-x system system 2018-05-25 04:19 com.example.newdialer-1
drwxr-xr-x system system 2018-06-07 13:27 com.example.sharedpreferencestest-2
drwxr-xr-x system system 2018-04-28 09:40 csumissu.fakewechat-1
root@vbox86p:/data/app #
/data/data/
这个目录应该是开发者访问的最多的目录了，这里包含了App的数据信息、文件信息、数据库信息等，以包名的方式来区分各个应用：
root@vbox86p:/data/app # cd ../data
root@vbox86p:/data/data # ll
drwxr-x--x u0_a70 u0_a70 2018-06-18 11:38 andy.ham
drwxr-x--x u0_a0 u0_a0 2018-03-24 05:27 com.android.backupconfirm
drwxr-x--x bluetooth bluetooth 2018-03-24 05:27 com.android.bluetooth
drwxr-x--x u0_a18 u0_a18 2018-03-24 05:27 com.android.browser
drwxr-x--x u0_a20 u0_a20 2018-03-24 05:27 com.android.calculator2
drwxr-x--x u0_a21 u0_a21 2018-03-24 05:27 com.android.calendar
drwxr-x--x u0_a22 u0_a22 2018-03-24 05:27 com.android.camera2
drwxr-x--x u0_a23 u0_a23 2018-03-24 05:27 com.android.captiveportallogin
drwxr-x--x u0_a24 u0_a24 2018-03-24 05:27 com.android.certinstaller
drwxr-x--x u0_a2 u0_a2 2018-04-14 03:01 com.android.contacts
drwxr-x--x u0_a26 u0_a26 2018-03-24 05:27 com.android.customlocale2
drwxr-x--x u0_a3 u0_a3 2018-03-24 05:48 com.android.defcontainer
drwxr-x--x u0_a27 u0_a27 2018-03-24 05:27 com.android.deskclock
drwxr-x--x u0_a28 u0_a28 2018-03-24 05:27 com.android.development
drwxr-x--x u0_a29 u0_a29 2018-03-24 05:27 com.android.development_settings
drwxr-x--x u0_a4 u0_a4 2018-03-24 05:27 com.android.dialer
drwxr-x--x u0_a30 u0_a30 2018-04-14 03:02 com.android.documentsui
drwxr-x--x u0_a17 u0_a17 2018-03-24 05:27 com.android.dreams.basic
drwxr-x--x u0_a48 u0_a48 2018-03-24 05:27 com.android.dreams.phototable
drwxr-x--x u0_a31 u0_a31 2018-03-24 05:27 com.android.email
drwxr-x--x u0_a32 u0_a32 2018-03-24 05:27 com.android.exchange
drwxr-x--x u0_a6 u0_a6 2018-04-14 03:02 com.android.externalstorage
drwxr-x--x u0_a33 u0_a33 2018-03-24 05:27 com.android.galaxy4
drwxr-x--x u0_a34 u0_a34 2018-03-24 05:27 com.android.gallery3d
drwxr-x--x u0_a58 u0_a58 2018-03-24 05:27 com.android.gesture.builder
drwxr-x--x u0_a36 u0_a36 2018-03-24 05:27 com.android.htmlviewer
drwxr-x--x system system 2018-03-24 05:27 com.android.inputdevices
drwxr-x--x u0_a38 u0_a38 2018-03-24 05:27 com.android.inputmethod.latin
drwxr-x--x system system 2018-03-24 05:53 com.android.keychain
drwxr-x--x u0_a39 u0_a39 2018-03-24 05:27 com.android.launcher3
drwxr-x--x system system 2018-03-24 05:27 com.android.location.fused
drwxr-x--x u0_a7 u0_a7 2018-03-24 05:27 com.android.managedprovisioning
drwxr-x--x u0_a8 u0_a8 2018-03-24 05:27 com.android.mms
drwxr-x--x radio radio 2018-03-24 05:27 com.android.mms.service
drwxr-x--x u0_a42 u0_a42 2018-03-24 05:27 com.android.music
drwxr-x--x u0_a9 u0_a9 2018-03-24 05:48 com.android.musicfx
......
/data/system/
这个目录包含了手机的各项系统信息：
/data/misc/
这个目录保存了大部分的Wi-Fi、VPN信息：