Hello guy´s I am a user of Alcatel OT-997D ("D"ual sim)
My problem ...
I have a extra partition called "custpack" symlinked to "system"
But is not a normal symlink
example
Code:
/custpack/JRD_custres/app/Email[B]-res[/B].apk
(contains recources and xml files)
/system/app/Email.apk
(containes only xml files)
or another example
merge SystemUI-res.apk(custpack) + SystemUI.apk(system) to SystemUI.apk (system)
How can I merge all files to one apk ?!
for example
Code:
Email.apk
?!
It is possible. But I don´t know what to do :crying:
My questions are all ignored... why ? :crying:
http://forum.xda-developers.com/showpost.php?p=40174749&postcount=538
http://forum.xda-developers.com/showpost.php?p=40174479&postcount=5258
nobody knowes something about ?
MaxAndroided said:
nobody knowes something about ?
Click to expand...
Click to collapse
We all Alcatel users have the same problem with custpack partition and files. If we want to try a different ROM, custpack partition makes it problematic. I found your question trying to get a response. So far there is a proposal by user yuweng related with scatter file when porting a ROM, you can find out more searching for this post in the MT65xx porting tutorial thread. The other thing is te Ewra Project ROM, the developers there have build a ROM for Alcatel devices with MT65xx chipsets and CWM scripts to backup and restore this custpack partition... maybe they have an answer.
Bumping this dead thread to draw attention to this.
It seems like this can simply be done by moving the actual apks to the location of the symlinked ones and remove the symlink creation from the updater-script, but I'm not sure and I think I tried it before and the screen never got past the boot-animation (but that might have been because I didn't copy the framework-res.apk, not sure). I'm currently playing around with this in the kitchen.
---------- Post added at 01:37 AM ---------- Previous post was at 12:38 AM ----------
kaiserII101 said:
Bumping this dead thread to draw attention to this.
It seems like this can simply be done by moving the actual apks to the location of the symlinked ones and remove the symlink creation from the updater-script, but I'm not sure and I think I tried it before and the screen never got past the boot-animation (but that might have been because I didn't copy the framework-res.apk, not sure). I'm currently playing around with this in the kitchen.
Click to expand...
Click to collapse
custpack/JRD_Custpack/apps/*-res.apk apps contain the apps resources i.e. the graphical png files used in the app but do not contain any code for running the application..
system/app/*.apks (deodexed) contain the code for running the application but do not contain any resources for the application.
It seems like this is an incredibly fragmented way of running the system. I believe the reason it's been done was so that manufacturers (or at least in alcatel's case) could custom theme most of the default system apps, like the phone, gallery, calendar, browser etc.
Still seems stupid.
I wonder if it's just a matter of combining the deodexed system/app/apk with the contents of the custpack/JRD_custpack/apps/*-res.apk and then resigning the apk, or if perhaps there's something in the system that hardcodes it to look in the custpack folder for certain apps (i.e. phone, browser, etc.)
MaxAndroided said:
Code:
/custpack/JRD_custres/app/Email[B]-res[/B].apk
(contains recources and xml files)
/system/app/Email.apk
(containes only xml files)
Click to expand...
Click to collapse
There are no regular way for doing what you want exactly because those resource files are not symlinked but you can try workaround with symlinking. In your example executive from /system/app/Email.apk calls for /custpack/JRD_custres/app/Email-res.apk to join resources. If you merge those two files into one, you got nothing because executive from /system/app/*.apk still search for /custpack/JRD_custres/app/*-res.apk but here is an idea what you may try:
First merge those two files into one: add resources from /custpack/JRD_custres/app/Email-res.apk into /system/app/Email.apk (decompile, join, recompile, sign, zipalign, you know the drill) and afterwards create symbolic link in /custpack/JRD_custres/Email-res.apk which points toward /system/app/Email.apk.
Code:
ln -s /system/app/Email.apk /custpack/JRD_custres/app/Email-res.apk
Possible scenario: when you start Email app, executive will search for /custpack/JRD_custres/app/Email-res.apk, which is now symbolic link and will redirect this request back to original APK (back to self) where resources are now. This should make you able to use various apps for changing themes on your ROMs or something like that.
Related
Hey everyone, I have successfully made a few ROMS for myself (using the DSIXDA HTC Android ROM kitchen v 1.00). I am making a ROM for the HTC Evo.
I know how to do most of it, I have managed so far:
To add my own ringtones
To add my own notification sounds
To set the default ringtone, notification, and change the default wallpaper
Add a theme to my ROM
But there is a few questions I have. I have Googled, looked around on here, and done what I can to find the answers but I am so far unsuccessful.
My first question: Ok, I know that the default wallpapers reside in the system/customize/resource directory. I have attempted to replace the wallpaper (and small preview) wallpapers with my own custom ones. I tried using Paint.net for Windows to resize to the same dimensions as the default wallpaper. For example, to replace htc_wallpaper_01.jpg, I edited a 960x800 wallpaper to have the same size and name (everything the same) and changed htc_wallpaper_small_01 with a matching 80x60 smaller version of the new graphic. I have found sometimes it works, but if I do a few using the method mentioned above, the ROM fails to load up. Can someone help and explain why?
Question 2: I am trying to place the removed apps automatically on the SD Card. I made a "sdcard" folder in the root directory of my ROM. I tried editing the update.zip to include copy_dir PACKAGE:sdcard /sdcard and when I do a check for errors I get none, yet when I try and install the ROM it gives me the "E:syntax error in update script" meaning I am not doing it right. I tried doing it the same way Fresh did it and it also threw me the same error.
So can anyone please tell me how to do this? I know I am close with both and I have tried dissecting other ROMS to see how they did it but I cannot figure it out.
First question:
It could be many possibilities. Maybe not enough room on system, file names not matching, etc...
Try each png on seperate flashes to find the culprit.
*The best way to find out for sure is to use "adb logcat" on boot. This tells you all your errors the OS has.*
Second question:
Im not understanding what your trying to do?
Root of a rom is /
sdcard is mounted to a folder on /
If you want to store the apk on sdcard then,
the proper code to install in /sdcard from update.zip:
Code:
copy_dir PACKAGE:sdcard SDCARD:
If this is not what your asking please explain to me what your asking.
RichieDaze said:
First question:
It could be many possibilities. Maybe not enough room on system, file names not matching, etc...
Try each png on seperate flashes to find the culprit.
*The best way to find out for sure is to use "adb logcat" on boot. This tells you all your errors the OS has.*
Second question:
Im not understanding what your trying to do?
Root of a rom is /
sdcard is mounted to a folder on /
If you want to store the apk on sdcard then,
the proper code to install in /sdcard from update.zip:
Code:
copy_dir PACKAGE:sdcard SDCARD:
If this is not what your asking please explain to me what your asking.
Click to expand...
Click to collapse
Thank you RichieDaze for the response.
You mentioned png., but all the ROMS I have seen have the wallpaper in .jpg format. I was just wondering if there was a certain size they have to be (I mimic the exact size of the default ones).
I think I got this part worked out by doing exactly that, installing 1 at a time until I find the culprit.
For question 2: Thanks to using the DSIXDA kitchen, I cannot use updater.script, which seems to be the way ROM makers like Calkulin, Hero_over, and other have used to set their removed apps to automatically copy on to the SD card when you install the ROM.
I have to use update.script instead, and when I try and do it using that I run into an error.
What I am trying to is remove the usual bloat from the ROM, but copy the removed apps so that users can have the option of installing them if they use any of them.
You are answering my question and are on the right track to helping me. I will try to add that (the way you wrote it out) and see what happens to my update.script.
Thank you very much for your help, greatly appreciated and please let me know if there is some other way to do this if you are aware of any or if someone is using update.script instead of updater.script.
Alright, just got my hands on a system dump courtesy of loglud so I will be posting files (text files will include content that peaked my interest) here so me and other devs can see what we are able to toy with.
systemdump download link: http://dl.dropbox.com/u/15069134/SystemDump.zip
Current list:
/system/media/bnapps_icons\ <-- we can mod the app icons that come with the device so we can make it less-sucky.
/system/etc/bluetooth/blacklist.conf <-- referencing the bluetooth chip meaning we just have to find a way to activate it
/system/app/settings.apk <-- anyone think they can actually replace this with another gingerbread apk or decompile and discover if there is a custom intent? Warning: It does NOT work at all. I suggest against swapping the apk's out as it causes a force close.
/system/bin/bootanimation *Was told where it searches for bootanimations first so goto this thread for a new bootanimation: http://forum.xda-developers.com/showthread.php?t=1361735
Indirect said:
Alright, just got my hands on a system dump courtesy of loglud so I will be posting files (text files will include content that peaked my interest) here so me and other devs can see what we are able to toy with.
Current list:
/system/media/bnapps_icons\ <-- we can mod the app icons that come with the device so we can make it less-sucky.
/system/etc/bluetooth/blacklist.conf <-- referencing the bluetooth chip meaning we just have to find a way to activate it
/system/app/settings.apk <-- anyone think they can actually replace this with another gingerbread apk or decompile and discover if there is a custom intent?
Click to expand...
Click to collapse
Nice finds. Bluetooth will be intesting to test (about to do it right now).
As you know the Nook has a heavily modified framework, so I don't know if the stock settings app will work (but I'm about to find out and probably fark up my tablet).
Let me know how it goes anlog.
Indirect said:
/system/app/settings.apk <-- anyone think they can actually replace this with another gingerbread apk or decompile and discover if there is a custom intent?
Click to expand...
Click to collapse
Hmm . . . let me get a hold of it and I'll look at it tomorrow, I've already taken the rest of the week off (Diablo III beta key came in tonight).
You may not need to change out the settings.apk but just add another one to it.
I decided to hold off on swapping the settings.apk. Losing access to the real settings app with all of the Nook options might not be a good idea.
The main reason I wanted a full settings menu was to be able to get into the accounts sync settings, but I found an app to launch it.
Warning: It does NOT work at all. I suggest against swapping the apk's out as it causes a force close.
Indirect said:
A
/system/bin/bootanimation <-- It's not a .zip or anything, just a file...anyone know how we can edit this?
Click to expand...
Click to collapse
It's a binary file. This app executes bootanimation resources.
Example: on T-Mobile MyTouch 4G resources are in /system/customize//resource/htc_bootanimation.zip
You should search for bootanimation.zip and you can edit this archive
Indirect said:
Warning: It does NOT work at all. I suggest against swapping the apk's out as it causes a force close.
Click to expand...
Click to collapse
I read note, if you want edit system apps like Settings.apk you should sign them by personal keys only...
I was looking through and couldnt find a bootanimation.zip in the system so I'm checking the data folders now.
edit: What the hell, still can't find it.
Indirect said:
I was looking through and couldnt find a bootanimation.zip in the system so I'm checking the data folders now.
edit: What the hell, still can't find it.
Click to expand...
Click to collapse
I was using Absolite system to see if I could replace the bootanimation because I couldn't find it either. I did manage to make it go away and just had the splash screen. I'll look into this further today as well. I'm starting to get ideas as to which files you can and can't replace right now. Some will force an immediate reboot and get stuck in a boot loop. I also am trying to find what triggers and handles the home button menu, I am sure it is in the framework. I have framework.jar and services.jar decompiled and going through those as well. Reviewing logcats to see what I can track down. I have some other interesting stuff going as well
romified said:
I was using Absolite system to see if I could replace the bootanimation because I couldn't find it either.
Click to expand...
Click to collapse
Hmmm... Usually bootanimation is in /data/local/ or /system/media. May be it has different name?
/system/bin/bootanimation is the program that actually displays the bootanimation.
Normally it plays the contents of /system/media/bootanimation.zip, but it can also be hardcoded to play a fixed animation or designed to play a completely different format. (Such as on Samsung devices, where it only plays Samsung's QMG format until you replace the program.)
conundrum768 said:
I've already taken the rest of the week off (Diablo III beta key came in tonight).
Click to expand...
Click to collapse
conundrum768
Don't take this the wrong way, but I really hate you right now!
I tried getting in on the Diablo III beta, no luck!
Here is a file of some interest, it it looks to be encrypted because it would be of interest.
/system/recovery-from-boot.p
.p files are encrypted .m files. Not sure if anything exists out there to crack into that one, but I am sure it would tell some very interesting information and possibly allow hi-jacking the factory restore process?
Anyone familiar with .p files (pcode files) ?
---------- Post added at 12:20 PM ---------- Previous post was at 12:08 PM ----------
Also of interest are some .xem3 files under /system/lib/ducati
base_image_app_m3.xem3 --- 57 mb
base_image_sys_m3.xem3 --- 1.5 mb
I think could be system image files possibly from the little bit of research I have done. Due to the size of one of these (57 mb) and the name of the file, I was thinking maybe this is where the restore was getting it's base image from, but until I dig further I am not sure of that. The size of the file is what got my attention, much larger than other files in lib. That's half the size of CM7 in just one file.
Edit: These now look to be possibly drivers/firmware/images for Ducati and/or Pandaboard ? That's a large driver file....
The .p file is very much of interest I would think.
conundrum768 said:
Hmm . . . let me get a hold of it and I'll look at it tomorrow, I've already taken the rest of the week off (Diablo III beta key came in tonight).
Click to expand...
Click to collapse
It looks like the normal XML files are not controlling the layout and it is done through the smali files to get the custom actions and layout. A separate app to access development may be best for now, as we have been doing.
Unless someone edits the smali files of course, that's possible but will prove tedious and time consuming unless you have a lot of experience with these.
If you review the logcats from going into settings, you will see which smali files are involved.
I have almost a full system dump on an ftp so ill see about letting it be accessed.
Sent by breaking the sound barrier
Please upload full system dump from Nook Tablet
Please upload full system dump from Nook Tablet
How-to
1. Get root
2. Run terminal (enter su if symbol $ -> it will be changed to #)
3. Execute command mount
4. From list of partitions search for /system
Code:
Example: /dev/block/mmcblk0p27 /system ext4 ro,relatime
5. Dump it to sdcard with command dd
Code:
Example: dd if=/dev/block/mmcblk0p27 of=/sdcard/system.img
It dumps only system image not personal data...
I'll just upload a .zip to dropbox.
Is there a sanim.zip anywhere? If so, that's the bootani. If not, ill sink back to silence lol
Sent from my Samsung Legendary 4G, a Universe UTES phone, running "two.three.five"
I looked through and there are only a few .zip files but none of them actually contained a bootanimation. It really is annoying lol. This device is such a bastardized version of android, I can't wait to get past the bootloader. lol.
Ok, got a bit of a problem here... I need to change the default homepage of the browser in a Rom I'm cooking... that means the homepage you get after a full factory reset, not that you set in the menu.... Please don't tell me how to set it in the browser menu....
A bit of background... I'm using a leaked Rom to build from. It was leaked from a Tracfone "LG-L95G" which is identical in every way to the LG-P999 aka T-Mobile G2X. Everything is working 100%. The only problem left from the "porting" is removing Tracfone as the default browser homepage.
This has turned out to be harder than I expected.
What I have done:
Browser.apk - the xml lists Google as the homepage. The word "tracfone" appears NOWHERE in the entire structure of the decompiled xml or values or even in the smali code.
SystemUI & framework-res - I've seen suggestions the homepage hides here. Can't find anything suggesting a setting to "tracfone"
flexdb - I really thought I had it kicked here. /system/etc/flex.db listed m.tracfone.com as the homepage for T-Mobile US. I changed all occurrences here to about:blank. I have also tried simply copying the flex.db from a P999 itself. Ie, removed ALL references to tracfone service and made it identical to a P999 in every way.
Ran grep -R tracfone * on the entire ROM.
Dug through tons of files by hand looking for any clue.
Unfortunately, even with all of that, do a wipe, open the browser, and you GET M.TRACFONE.COM again!
The word "tracfone" does not appear in build.prop, it does not appear in any init scripts, not even in the kernel scripts! Yet it comes back like Christine...
Does anyone have a clue where I could look next? Or failing that, even some way from an init.d script that I can overwrite the setting myself?
EDIT
Okay, I hate giving myself clues like this, but maybe this will help others (if I'm on the right track)...
Instead of doing a grep on the ROM from my PC, pre-install, I decided to actually hit up the RUNNING copy... so from adb into a Bash prompt on the phone itself, I ran a grep -r tracfone * and got the following result:
Code:
data/data/com.android.browser/databases/browser.db:Web page not availablehttp://m.tracfone.com/
data/data/com.android.browser/shared_prefs/com.android.browser_preferences.xml:<string name="homepage">http://m.tracfone.com</string>
data/data/com.lge.providers.flex/databases/flex.db:M77BRW_SETTINGDB_CURRENT_HOME_URL_Ihttp://m.tracfone.comhttp://m.tracfone.comI#
data/data/com.lge.providers.flex/databases/flex.db:=77BRW_SETTINGDB_HOME_URL_Ihttp://m.tracfone.comhttp://m.tracfone.como"
data/data/com.lge.providers.flex/databases/flex.db:=;;DATACOM_ACCOUNT_MMSC_0_Ihttp://mms.tracfone.comhttp://[email protected]
data/data/com.lge.providers.flex/databases/flex.db:;%%DATACOM_ACCOUNT_APN_0_Iwap.tracfonewap.tracfone:?
data/data/com.lge.providers.flex/databases/flex.db:M77BRW_SETTINGDB_CURRENT_HOME_URL_Ihttp://m.tracfone.comhttp://m.tracfone.comI
data/data/com.lge.providers.flex/databases/flex.db:=77BRW_SETTINGDB_HOME_URL_Ihttp://m.tracfone.comhttp://m.tracfone.como
data/data/com.lge.providers.flex/databases/flex.db:=;;DATACOM_ACCOUNT_MMSC_0_Ihttp://mms.tracfone.comhttp://mms.tracfone.com6%
data/data/com.lge.providers.flex/databases/flex.db:;%%DATACOM_ACCOUNT_APN_0_Iwap.tracfonewap.tracfone:$
Which is very odd.... considering that is NOT the content of the actual flex.db that was flashed to the phone. That leads to 1 question: Why isn't the phone respecting the flex.db? I've noticed other edits to the file (such as bookmarks) do not apply either. So it is being ignored at somepoint. FlexProvider.apk maybe? Or is something in the ROM still identifying the phone to T-Mobile as an MVNO device and they're pushing out an OTA flex update?
EDIT 2:
AHA! There's a flex.db *INSIDE* the FlexProvider.apk file! So it *IS* ignoring the one placed in /system/etc/flex/! Editing this should solve it - but I'm going to test test test to make sure.
lotherius said:
Ok, got a bit of a problem here... I need to change the default homepage of the browser in a Rom I'm cooking... that means the homepage you get after a full factory reset, not that you set in the menu.... Please don't tell me how to set it in the browser menu....
Click to expand...
Click to collapse
firstly to say interesting question!!
but I think it it not possible to change programmatically default homepage
this is a system app so will be signed by your provider let us suppose you find homepage location in code (could by result of a script parsing) by modifying source of that apk package how to solve signature problem ?!
if in .db file ...this file is created after flashing as a result of script parsing
not framework-res.apk better browser-res.apk if you have one
ruscan.calin said:
firstly to say interesting question!!
but I think it it not possible to change programmatically default homepage
this is a system app so will be signed by your provider let us suppose you find homepage location in code (could by result of a script parsing) by modifying source of that apk package how to solve signature problem ?!
if in .db file ...this file is created after flashing as a result of script parsing
not framework-res.apk better browser-res.apk if you have one
Click to expand...
Click to collapse
man use a ... editor...I can show you for fifty bucks
I was just curious about this tricky change (from your post) so thinking about Google motto don't be bad finally I have found but should recognize that I am bad at this time
here is solution
Actually, you can use an sqlite editor to change the values in the flex.db file... the problem I was having in the OP is that on an LG phone (maybe others?) the flex.db file is ignored and the one inside FlexProvider is used instead, so you have to edit both. You can add new locales the same way. No need to use a hex editor, as that would be much more difficult.
lotherius said:
Actually, you can use an sqlite editor to change the values in the flex.db file... the problem I was having in the OP is that on an LG phone (maybe others?) the flex.db file is ignored and the one inside FlexProvider is used instead, so you have to edit both. You can add new locales the same way. No need to use a hex editor, as that would be much more difficult.
Click to expand...
Click to collapse
maybe you are right regarding your phone... but also I prepare a custom rom for Alcatel ot-908 also to change default homepage was a problem for me but I did and simply works !
Hello,
I'm trying to hack an apk.
My first step was to use apk multi tool, and to just decompile and recompile it.
This is what i've done:
decompiling
recompiling (without any mod)
signing
No error appears during those steps.
But this new apk won't install on my phone !
If I check difference between the two apk:
all xml files are differents
.RSA and .SF have not the same name
classes.dex, resources.arsc and manifest.mf are differents
I don't understand those difference. can somebody help me to understand that and how to recomile a proper version ?
PS: This app is a french app that shows speed cameras on the road. However this app is now only showing a big zone and not the exact location for france. But it stills show precise location for other countries, so obfuscation is done at the apk level, and I already found where it is in the code, so i'd like to bypass it and recompile a "special' version
Thanx
Just a few quick questions. Is you phone set to install from sources than Droid market? You do know the newly compiled and signed project will be located in the "place_package _here_ for_Modding" folder and is named "Signed(yourappnamehere).apk?
Sent from my SAMSUNG-SGH-I727 using xda premium
Hi,
yes, i took the newly compiled apk in this directory, and yes my phone is set accept unknown sources.
When i install the apk, i first have the
- liste of phones serviesc that will be used
- then the install progress bar
- then the message "application not installed"
I guess there is some kind of protection in the sources...
I also noticed that the two apk - original, and resigned one - don't have same size.
The only difference is actually in the META-INF directory : the .RSA and the .SF files.
In the original application they are:
- IFOX_.RSA
- IFOX_.SF
But when recompiling, those files are:
- CERT.RSA
- CERT.SF
I'm shure the problem comes from here, but i'm too noob to analyse that...
So my proble can be sum-up by:
Why the recompilation doesn not give me the same RSA and SF file ??
Beware there are some modifications that you cant do on decs, expecially the packagename.
also beware to disable the "non-market" tag on the phone.
Yes, but for the moment i didn't make any modification:
Just decompiling, recompiling and resigning.
Maybe you want to tell that the apk name must stay the same ? (sorry my english is not perfect )
GOT IT WORKED !!!
You must first uninstall the previous application !
I was trying to install my new one over the old one, but the signatures are not the same !!!
Thanx everybody, and hope this will help somebody !
APK edit error 103
Ok im having a similar issue.
I know the file size is mismatched but ive never had this issue
as a test i only modded 1 thing but 4 files
changed a link in an html / changed an image and its name and the html included the link to the new name
when this failed i changed the manifest and the .sf to match the change i made with name but not the sha :"no clue here"
Tried...
APK multi tool ... and 7zip to make the mods
Tried... Bothsigned and unsigned.
Tried copying the sig from old apk to new with names corrected "notsha" fail still
Tried....
Origional APK installs no issue
Uninstall orig apk rebooted
Allow out side apps yes and no.both
using file manager explorer and root browser and es file manager
Copying directly to /system/app fail
copying to data/data/app/copy fail " yes it wont even copy to there"
Tried.. Multiple phones
I then tried a hex editor on the apk. And after changes install still fail.
I modded several other apk's even my framework but this is the first app that ha given me so many issues
This is an app to help elderly users access internet and the devs are AWOL and the project abandoned
Code:
https drive google com/folderview?id=0B5PggxVy7c8meDhrcjNJOGs5cFk&usp=sharing
Code:
www eldy eu/en/software/eldy-tablet/
"edited for posting "
The goal here is to make it more U.S. friendly its English base is geared to English UK and this does not help my family as we are in the U.S.
All i can get from logcat is error 103
Logcat shows package it.vegans.eldy has no certificate at entry AndroidManifest.xml ignoring
Knstallation error code 103
I tried apk multitool certify thing
i tried copying the certs from old to new apk
i tried modding the cert to correct names
So maybe im mentally challenged but i just cant figure this one out
---
Edit .
I attached a zip with original and modified apk's
All i want to do is simple html edits xml link edits and img changes since mostly the app is a series of pages.
I'm wondering what every folder contains in the system folder of a Custom/ROM. Can some please explain this to me. By system folders i mean:
app
bin
(csc)
etc
fonts
framework
lib
media
T9DB
tts
usr
vsc
xbin
Thanks.
system folder +1
I would like to add my interest to this thread. I know this is kind of a noob question, but short of perusing through the android documentation for hours, and buying an embedded Linux book, it would be nice to know. I would like to make a new port of ICS, and I cannot get proprietary drivers for some of the stuff in my device. It would be nice to export the closed binaries and then deploy them in my new port.
Alternately, if someone could point me to a better thread that would be helpful also. I have the repository for the Linux kernel, and the android one installed already, and I have been looking around for documentation, off and on, for weeks..................
The internet just has too much information on it :fingers-crossed:
You might look around for some tutorials on the "linux file system", since android mirrors much of it.
/system/app are system apps (the apk files)
/system/media has bootanimation, ringtones, notification tones, camera shutter sound, stock keyboard sounds, lock/unlock sounds, etc.
Other file I really don't know, but google is definitely your friend
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