Extract google android file system image

To run google android on the truely hardware, you may need the google android
file system image.

Google android file system consists of two parts:
system and data.

You can find the google android file system image on benno's
website: Android
filesystem images

You can also extract the google android file system
by yourself from the android emulator by the following way:

1. download the
google android sdk and extract onto your platform

2. start up the google
android emulator

3. upload a busybox tool to the google android emulator, you
can find a busybox binary on benno's website: busybox
for android
, you can also find the cross-compiler
(select ARM GNU/Linux, and IA32 GNU/Linux)
and create a busybox tool by
yourself.

4. to upload files to the google android emulator, run the
following command:

# adb push filename
/target_folder/filename

the target_folder is the folder on the file system of
google android emulator. e.g. /system/bin/

put the busybox to /system/bin, so
you can see busybox tool in the extracted file system.

5. open a
google android shell command window:

# adb
shell

6. change the busybox mode to 555:

# chmod 555 /system/bin/busybox

7. create
the tarball for /system and /data:

#
busybox tar cvf /system.tar /system

# busybox tar cvf /data.tar /data

8. pull
the tarball file from the google android emulator:

# adb pull system.tar /system.tar

# adb pull data.tar /data.tar

a note:
when you want run google android on your truely hardware, the data.tar is not a
must.