Android :: Writing To SD Card - Deleting Files On It - Number Of Files Relevant
Mar 19, 2009
I wrote an app that downloads web sites and all their assets (images/stylesheets) to "disk" and therefore stores lots of small files on the SD card.
Sometimes it fails to delete large amounts of files and afterward the file system is r/o. To analyze that behavior I tried to do the removal of the files by hand and then go from there. But that already failed.
localhost:~ mkamp$ adb -d shell mount [.. some mounts ..] /dev/block/mmcblk0p1 /sdcard vfat rw,dirsync,nosuid,nodev,noexec,uid=1000,gid=1000,fmask=0711,dmask=0700,codepage=cp437,iocharset=iso8859-1,utf8 0 0 --> R/W
Last login: Wed Mar 18 19:41:49 on ttys005 localhost:~ mkamp$ adb -d shell rm /sdcard/newsrob/a* [.. minutes of silent deletes ..] rm failed for /sdcard/newsrob/a2aade03616c28b30_113.png, Read-only file system localhost:~ mkamp$
localhost:~ mkamp$ adb -d shell mount [.. some mounts ..] /dev/block/mmcblk0p1 /sdcard vfat ro,dirsync,nosuid,nodev,noexec,uid=1000,gid=1000,fmask=0711,dmask=0700,codepage=cp437,iocharset=iso8859-1,utf8 0 0 --> R/O now
The log contained nothing but the usual gc output and random WiFi status changed mumbo jumbo.
Anybody else seeing this behavior?
There were 6.500 files in that directory. Might that be the problem? I don't access the files with queries, I always have the exact name.
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Feb 2, 2010
I'm a beginner in Android and request any help on the following. I'm trying to use an SD Card loaded on to the Emulator and store files pro grammatically. The code snippet is as below public class Down loader { public Down loader(String path){ this.path=sanitize(path); Log.d("DEBUG","The File Path is " + path);}
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Feb 7, 2009
I'm writing an podcast playing application. The application has pre- defined feeds but I want to cache the image of the feed for 30 days. However, on the initial creation of the podcast I am downloading the image, and trying to save it to the SD card using the code below:
CODE:............................
However, it keeps failing on the line k.createNewFile(); with the error: WARN/System.err(10727): java.io.IOException: Parent of file is not a directory: /sdcard/twitcast/1.jpg
I've checked and I have write permission and the SD card is mounted, and I have android.permission.MOUNT_UNMOUNT_FILESYSTEMS included in my manifest. why this keeps failing?
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Mar 23, 2010
I read my manual regarding deleting files from the sd card. I am not sure if i understand it though. Can i safely delete files through my pc's file manager (while tethered) rather than through the phone it self, files such as pictures and music? And what about the folders left behind from downloaded apps? Can i simply delete those while tethered?
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May 7, 2010
How do you go about checking what is stored on your phones memory and deleting content? For example I used dropbox and downloaded a 7mb photo onto my phone. Can't find it in the photos app or anywhere else. Going into SD & phone storage under settings doesn't do anything. It says I have 70mb available space under phone storage but you can't click on that to get any further info. Same goes for the SD card options.
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Apr 16, 2010
I have a project written for Android devices. It generates a large number of files, each day. These are all text files and images. The app uses a database to reference these files.
The app is supposed to clear up these files after a little use (perhaps after a few days), but this process may or may not be working. This is not the subject of this question.
Due to a historic accident, the organization of the files are somewhat naive: everything is in the same directory; a .hidden directory which contains a zero byte .nomedia file to prevent the MediaScanner indexing it.
Today, I am seeing an error reported:
CODE:................
Regarding the sdcard, I see it has plenty of storage left, but counting
$ cd /Volumes/NO_NAME/.hidden
$ ls | wc -w
9058
Deleting a number of files seems to have allowed the file creation for today to proceed.
Regrettably, I did not try touching a new file to try and reproduce the error on a commandline; I also deleted several hundred files rather than a handful.
However, my question is: Are there hard limits on filesize or number of files in a directory?
am I even on the right track here?
Nota Bene: The SD card is as-is - i.e. I haven't formatted it, so I would guess it would be a FAT-* format.
The FAT-32 format has hard limits of filesize of 2GB (well above the filesizes I am dealing with) and a limit of number of files in the root directory. I am definitely not writing files in the root directory.
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Mar 19, 2014
My Sandisc 64GB SD card went kaputt last week, it froze at 33GB, luckily the existing files are all ok and I was able to copy all the files onto my PC, however nothing new can be written to it. I've tried formatting with no success. So I copied the files onto the PC and just got a new this time Samsung 64GB micro SD card. Problem I'm having now is that on several attempts it's failed to copy the files back to my SD card (from PC) I've formatted the card in the Note 3..the music files about 4 GB transferred just fine, the problem seems to be with the Pix and Videos. I'm currently trying to copy the DCIM folder back onto the micro sd and it's saying it'll take 6 hours.
I have tried: copying from PC to micro SD in the phone via USB copying from PC to micro SD in SD card adapter plugged directly into PC
copying from PC to micro SD in USB adapter plugged into PC
all results the same
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Nov 10, 2010
I am trying to write some simple data to External storage using the following code.
I am missing something here but not sure what.
CODE:..............
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Jan 20, 2010
I have a game the allows the user to save the game in a file. I have a new update coming out the will make the previous saved games not work. Is the any way to delete all the files that my program created?
I have been serializing the games and saving them like this:
ObjectOutputStream os = new ObjectOutputStream(openFileOutput(gameName + ".sav", 0)); os.writeObject(gameObject);
I know I can go through the list of games and do something like this
for(GameName name : gameList) { deleteFile(name + ".sav");
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Jul 2, 2010
i've downloaded some pdf files to my storage card. can't seem to find a way to delete them.
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Jul 20, 2010
I'm developing for the Android platform.
My app creates a temp file with a simple call to:
FileOutputStream fos = openFileOutput("MY_TEMP.TXT",Mode);
It works fine because I can write to it and read it normally.
The problem is that when I exit from the app I want to delete this file. I used:
File f = new File(System.getProperty("user.dir"),"MY_TEMP.TXT");
f.delete()
But it always returns false and the file is not deleted.
I have tried
File f = new File("MY_TEMP.TXT");
f.delete();
And it does not work either.
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Oct 14, 2010
Can't delete a jpg file which is showing in mediascape under recently viewed - my photos
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Oct 15, 2010
I want to delete all the files on the internal sd card so that my phone will be like straight from the factory. Are the system files on my phone (GT-I9000) protected from deletion even though it is rooted and would my my phone still boot up?
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Dec 10, 2009
Currently I am having an issue with my SD card storage.
It started when iMusic told me i was out of space, on a 4gig SD card when i had mayb 5 songs on the phone!
So i went to my astro manager file manager to delete some files just to see. i keep getting "error deleting files" on anything i try to delte, ive taken the card out rebooted etc etc.
It makes me think the card may be locked? as its not even letting me save anything to it now.
Should i just root the dang thing to avoid problems like this?
I can delete files by going into the generic "music" app and long touching the song and selecting delete.
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May 22, 2010
Anyone notice this or figure out why? I am trying to delete PDF files off the SD card and Astro just says "error deleting file."
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Jul 25, 2010
I have an unrooted Evo and I'm really low on internal space and don't want to root...if I could delete the system update files like "com.htc 2.1-update 1" and "Android System 2.1-update1", that would help to free up about 23mb of space...can I uninstall them or would that revert the system to the pre-updated state?
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Feb 4, 2014
How can you delete files from Quickoffice? No options at all. Using DROID Maxx
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Aug 3, 2013
I wanted to show a picture to a friend of mine. Opened my gallery > ehm, what is going on here? > there were no photos images anymore.
First I thought that the gallery app got some problemes, rebooted my phone, still the same. Looked up the folders with Solid Explorer, well ... all files got definitely deleted.
I searched for this here on xda and google. Well, all I found out was that it could be ROM related, or that it could have something to do with RomManager (haven't installed it though). The curious thing is that the *.jpg and *.mp4 files got deleted from all folders and subfolders, not only from DCIM and even from the sd card.I'm not here for any recovery attempts, have done this already
Well this is not all. I've got some *.avi files on my phone (internal and external storage). Theses files were deleted too. BUT not at the same day as the other media files (*.jpg and *.mp4).
So this is the pre story. Now I wanted to know what can I do to discover what is causing this problem, because what's next? Is my phone deleting all my files in a few days?For me it seems like a script that is searching the whole device for media files and deleting them. (malicious?)My thoughts were:to smali all applications and try to find out if a app is causing this to analyze logcats.Well, These options seems to be very long-lasting,
I haven't isntalled any apps or updates the last two weeks so I think there are no problems with apps and therefore will not list them. phone is deleting media files two days ago it deleted *jpg and *.mp4 files from internal and external storage and from all folders (not only DCIM) today it deleted *.avi files from internal and external storage could it be a malicious script that is crawling my phone for those files?
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Sep 4, 2010
Some time ago...I estimate a week at most, I received an error when simply saving a file from my Browser, stating there was not enough space to do so. Knowing my phone had mre than adequate space, I presumed it was just an error with my browser.
Trying again with a different internet browser, I was met again with the same dilema. To make matters worse, I cannot permanently delete picture files from the default viewer on my phone. Queerily, I can delete them, only to have the pictures return hours later. To make my situation more unusual; Upon viewing the SD card mounted on my laptop, I can move, add & delete any form of files with ease. Even saving/deleting other files using different apps (Videobox, for example) gives me no hassle whatsoever.
One solution I'm willing, but at the same time reluctant to try is to reset my phone entirely to it's factory default setting (prior to backing up all of my SD card's data, of course)
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Feb 13, 2012
I deleted system files etc... while attempting to revert back to stock ROM. I cannot boot into TWRP nor communicate over USB.
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Apr 24, 2009
Can anybody advice what is the recommended directory to store files generated by your application: audio files, video files or some images.
If the phone contains SD card, it is clear that files should be saved there, but if there is no any external storage. where would you recommend to save to?
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Nov 4, 2010
I am working on an android app. Where i need to parse some plist files from assets folder. I do understand how to use assets in android but now problem is that file sizes are more than 1MB and so android gives error Data Exceeds UNCOMPRESS_DATA_MAX (2183588 vs 1048576). how to access such larger files from assets? Also I cant reduce a file into small buffers because i am just sending it to "DocumentBuilder.parse(in)" as a whole so can not use buffer. The error is on line: Document doc = db.parse(in).
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Jun 11, 2010
I am trying to overlay route data in KML files on a MapView.
The following code works great:
CODE:................
The only problem I have with this is that I don't need to re download these KML files every time. I have about 10-15 KML files that will rarely change. Also since it has to connect, download, and parse these each time there is a delay in opening the maps.
It would make a lot more since for me to save these as a local resource and have the URI reference it there. Is there a way to construct a URI using the geo: scheme and have it point towards a local resource?
It looks like file:///sdcard support was included in 2.1. The only reference I could find to it was at the end of this bug report thread. I am currently at work and don't have time to play with this yet but I would like to figure it out later. I feel like there are a lot of people on stackoverflow and elsewhere who would really appreciate a reasonable way to do this.
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Jan 8, 2014
I lost my phone. I forgot to note down the IMEI number. However i took TWRP backup of EFS Partition. I can open the EFS partition file through winzip software in my computer and see various files (like nv_data.bin etc). I want to find out the IMEI number from the backup.
How to extract the IMEI number from my computer from the backup of EFS Partition files?
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Jul 29, 2009
To android working on eclipse with android 1.5 r2 version when i am running a basic program its showing a error .apk file not found.
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May 11, 2010
I want to know how to get the ringtone,audio files in the device and I want set them as alarm. I am working in the code to set the alarm and I want to know how to retreive audio or ringtones from the device.
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Aug 18, 2010
I have a desire and have just rooted and am now trying to install the new 2.2 update that i have downloaded of the web (i am locked to t-mobile so am going to create a gold card) i did a nandroid backup but i have done 2 by mistake. Is there anyway to delete one or both once i have finished doing my best to brick my phone lol. i don't relay want them floating around forever on my phone if i don't need them. also one other quick question if i unlock my phone and install standard htc os (as apose to t-mobile os) can i unroot my phone and still be on the new htc os so i can get all the updates with no mither.
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Sep 15, 2010
My application needs to do some clean up. I need to list the files such as "ls voice*.amr", and then delete those files. How could I do it in Android?
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Oct 24, 2008
I think we really need a file manager for the g1 so that we have a single app to access all the file on the internal or sd memory instead of going to each appropriate program for the files wanting access to.Secondly, what are the requirement for files on the sd card? Do they all have to be jumbled together in the root directory or can the be organized into folders and still be found by the programs?
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Nov 6, 2010
Sometimes I'm browsing the web and... One more download... And then oops! Another one...Then I realised that those downloads are still in my download list and there's no option to COMPLETELY remove them. Also, where do I clean browser's temporary files?
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