Android 4.0.3 Emulator File System Hierarchy

This section describes file system hierarchy used by the Android 4.0.3 emulator system.

On an Android system, file systems are mounted into a single file system hierarchy.

After connecting to the Android 4.0.3 emulator with the "adb shell" command, I used "cd" and "ls" shell commands to explore the file system hierarchy. Here is what I see:

/ - Base file system
 cache - Folder used as scratch pad by the system
 data - Folder for USER Data stored as a separate partition
  anr
  app - Folder for user installed application package .apk files
  dalivk-cache
  data - Folder for application data with package name as sub folder
  local
  ...
  system
 default.prop - File with default system settings
 dev - Folder of device pointers
  block - Folder of block device pointers
  ...
  null
  tty1
  tty2
  tty3
 etc - Folder for program configuration files
 init - File with initial execution code
 init.rc - File with initial configurations
 proc - Folder for running process pointers
  ...
  cpuinfo - File with current CPU information
  diskstats - File with disk statuses
  ...
 root
 sbin - Folder for binary executable codes
  adbd - File with Android Debug Bridge Daemon (adbd) executable code
 sys 
 system - Folder for the operating system files - read only
  app - Folders for pre-installed application package .apk files
  bin - Folder for system binary executable codes
  build.prop - File containing configuration settings
  etc - Folder for configuration files
  framework Folder for JAR and ODEX files of Android framework
  fonts - Folder for font files
  media - Folder for media files
  xbin - Folder for binary executable files.
 sdcard - Folder for files in the removable SD Card. 
 mnt - Folder for file system mount points

Last update: 2012.

Table of Contents

 About This Book

 Installing JDK 1.8 on Windows System

 Installation of Android SDK R24 and Emulator

 Installing Apache Ant 1.9 on Windows System

 Developing First Android Application - HelloAndroid

 Android Application Package (APK) Files

 Android Debug Bridge (adb) Tool

 Android File Systems

Android 4.0.3 File Systems

 Android 4.0.3 Emulator File Systems

Android 4.0.3 Emulator File System Hierarchy

 AboutAndroid - Application to Retrieve System Information

 android.app.Activity Class and Activity Lifecycle

 View Objects and Layout Resource Files

 Using "adb logcat" Command for Debugging

 Build Process and Package File Content

 Building Your Own Web Browser

 Android Command Line Shell

 Samsung Galaxy Tab 3 Mini Tablet

 USB Debugging Applications on Samsung Tablet

 Android Tablet - LG-V905R

 USB Debugging Applications on LG-V905R Tablet

 Android Phone - LG-P925g

 USB Debugging Applications on LG-P925g Phone

 Outdated Tutorials

 References

 PDF Printing Version