Android :: Any Application To Write Files To SD Card?

Aug 19, 2009

Can we assume that App can write to /sdcard some file? What can be reason one cannot do that? I could not find any documentation on sdcard rules in google docs.

Android :: Any Application to Write files to SD Card?


Android :: Application That Can Read And Write Txt Files To SDCard

May 3, 2010

I have an application that can read and write txt files to the phones sdcard. By using this code for reading files:

@Override protected void onListItemClick(ListView l, View v, int position, long id) { super.onListItemClick(l, v, position, id); mFileNameOpen = files.get(position);
String st = null; mVector.clear();
notepad.mNewEmpty = false; try { File f = new File(Environment.getExternalStorageDirectory()+"/ notepad/"+mFileNameOpen); FileInputStream fileIS = new FileInputStream(f);
BufferedReader in = new BufferedReader(new InputStreamReader(fileIS));
do { st = in.readLine();
mVector.add(st);
}while(st!=null); in.close(); ...
} catch (FileNotFoundException e) { e.printStackTrace();
} catch (IOException e) e.printStackTrace();

and this to write them:
try { File root = Environment.getExternalStorageDirectory();
File fileCheck = new File(root, "/notepad/" + fileNameSave + saveExtension);
boolean exists = fileCheck.exists();
if (!exists) { if (root.canWrite()) { File textFile = new File(root, "/notepad/" + fileNameSave + saveExtension);
FileWriter textWriter = new FileWriter(textFile);
BufferedWriter out = new BufferedWriter(textWriter);
out.write(SAVEAS); out.close(); written = true;
} else { written = false; else { written = true; showMaybe = 1; showDialog(DIALOG_SAVE_EXISTS);
catch (IOException e) {Log.v(getString(R.string.app_name), e.getMessage());

This has been working fine on my Tattoo and all the emulators I've tried this on. But it does not seem to be working on moto droid. Is there something different to consider with moto droid? Or have I missed something in the manifest maybe?

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Android :: Can't Write To Files Dir But Can In Package Dir

Jul 6, 2010

I'm trying to save an object in a file but the file doesn't appear on the device and I don't get an exception either.

CODE:.....

If instead I use:

CODE:.....................

It works and I can see that the file has been created on the device.

But this isn't cool and it's not the way to do it because the directory structure may change in the future.

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Android :: Any Place To Write Temporary Files?

Mar 24, 2010

I am writing a content provider to access data in a zip file. The plan is to extract data as needed to temporary files since the API Requires a file descriptor (as opposed to an input stream). The question is where can an Android app write files - we can assume these are small and regularly purged. I do not believe the /sdcard is required.

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Android : Write/read Log Files In Res Folder

Mar 13, 2010

How to write/read log data into txt file in res folder.

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Android :: Want To Write Url Of Images Into Xml Files / Add Data To It In Phone?

Aug 23, 2010

I am downloading some images from website using xmlrpc now i want write the url of those images into xml files how to add data to exiting xml file in android

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Android :: Cannot Write To SD Card

Apr 12, 2010

Sorry for the ambiguous title but I'm doing the following to write a simple string to a file:

try {
File root = Environment.getExternalStorageDirectory();
if (root.canWrite()){
System.out.println("Can write.");
File def_file = new File(root, "default.txt");
FileWriter fw = new FileWriter(def_file);
BufferedWriter out = new BufferedWriter(fw);
String defbuf = "default";
out.write(defbuf);
out.flush();
out.close();
}
else
System.out.println("Can't write.");
}catch (IOException e) {
e.printStackTrace();
}

But root.canWrite() seems to be returning false everytime. I am not running this off of an emulator, I have my android Eris plugged into my computer via USB and running the app off of my phone via Eclipse. Is there a way of giving my app permission so this doesn't happen? Also, this code seems to be create the file default.txt but what if it already exists, will it ignore the creation and just open it to write or do I have to catch something like FileAlreadyExists(if such an exception exists) which then just opens it and writes?

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Android : Way To Write To /assets Direcory / Save Arbitrary Files To It?

Jun 8, 2010

Is there a way to write to the /assets direcory and save arbitrary files to it? I am intending to download a HTML page which should be updated from time to time. If no network connection is available it should be taken out of the assets directory. I know I can reference fils in here using the file:///android_asset/ base URL, but can I write to it, too?

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Android :: Permission To Write On SD Card

Oct 13, 2010

EDIT: Problem solved, FileOutputStream defined uncorrectly, change to: fos = new FileOutputStream( root + "/" + saveFileName );

I have a problem writing to the SD card, here is the code: (Sorry about the layout of the code, just copy pased it )

public class SaveAndReadManager {
private String result;
private String saveFileName = "eventlist_savefile";
public String writeToFile( ArrayList<Event> arrlEvents ){
FileOutputStream fos = null;
ObjectOutputStream out = null;...............................

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Android :: Permission To Write To The SD Card

Jan 23, 2010

I would like my app to archive the application DB to the SD card. In my code I check if the directory can Write(), and if not then throw an IOException. In this perticular instance, I am trying to copy the db file to the root directory on the SD card, but its throwing an IOException. How can I change the permission on a folder/file to be able to write to it

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Android :: SD Card's Write Authority In 1.6

Oct 16, 2009

Current I just use Android 1.6 emulator. I am writing a simple code which needs write one result file to SD card. But It is failed to open one file to write (Reading is ok). I tried to use C level API and Java level API but both of them are failed. Furthermore, I tried to use chmod comand in the shell but it is still useless. It is known in the Android 1.5 or befor, it should be OK. Is it a new feature of 1.6 or it is just my emulator's issue? If it is a new feature, can someone figure out how to write the data into SD card?

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Android :: Write To Sd Card Folder

Aug 23, 2010

I am using the following code to download a file from my server then write it to the root directory of the sd card, it all works fine:

package com.downloader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import android.os.Environment;
import android.util.Log;
public class Downloader {......................

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Android :: Sd Card File Write

Mar 17, 2010

I'm trying to write a file from an Http post reply to a file on the sdcard. Everything works fine until the byte array of data is retrieved. I've tried setting WRITE_EXTERNAL_STORAGE permission in the manifest and tried many different combinations of tutorials I found on the net. How my app writes file is by using a thread. Specifically, a thread is invoked from another thread when a file has to be written, so giving an activity object didn't work even though I tried it. The app has come a long way and I cannot change how the app is currently written. CODE:..................

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Android :: Write Data In SD Card?

Nov 1, 2010

my application is contact list and i want to store my contact data in sd card but how can i store data in sd card, or if i will use database then how i want to store it or using simple file than how i want to store it

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Android :: How Do We Write File To SD Card

Jul 3, 2010

Today, i tried to read and write file on the android. but it seems that file write mode is only provided for SD card? most of article is asked about SD card written. Is there no way to save data internal side?So when i install the application to real device. then its application installed in SD card or internal space? because we have make it log file from our application for everytime while application run.So, how do we write the file to SD card and specified the absolute path where we saved? to load this file.

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Android :: Write File To SD Card

Dec 14, 2009

I'm trying to create a file on the sd card.but that throws a FileNotFoundException. Isn't OutputStream supposed to create the file, if not found on disk? I'm looking to write image data there.This is on a 1.6 emulator. I have an SD card installed, I'm looking at the sdcard folder through DDMS, so it's there.

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Write A Program To Read PDF Files?

Oct 22, 2013

I want to write a program to read PDF files. Where should I start if I do need a special library?

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General :: How To Write Files Into The Directory

Jun 21, 2012

I'd like to know if there's a way to write files into the main directory just before the system shutdown, something like this:

End all processes (-> unmount disks?) -> mount /sdcard rw and / rw -> copy files from /sdcard to / -> unmount disks -> shutdown/reboot

Same with boot image (flash, in this case, and not copy / mod files)... is it possible? Or do I require to boot into recovery for these operations? I know I can remount as rw my system directory via ADB

Also, is it possible to do the same thing with the build.prop file? This, or during startup (before mounting partitions with standard permissions).

Of course, this having root (but not a special kernel to enable this kind of "before mounting" thing).

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Android :: Upgrade With SD Card Write Permission

Oct 23, 2009

If you have an app that targets 1.6 ( using targetSdkVersion=4 ) and that is still backward compatible with 1.5 (using minSdkVersion=3) , and it has the new WRITE_EXTERNAL_STORAGE permission because it writes to the SD card, there is a problem when the OS is upgraded to 1.6. If a user has Android 1.5 with the app installed, and then gets Android 1.6, the permission is not granted and writing fails. The issue can be solved if the user re-installs the app. I have not experienced the issue myself, but a few users have reported it. Can anybody else confirm this. There is not much that can be done about it, but it would need to be adressed if there is another OS upgrade.

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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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Android :: Fastest Method To Read / Write SD Card?

Jul 18, 2010

There are a lot of different classes that can be used in various ways to read/write to files in Android. For example, you can make use of java.nio.ByteBuffer, FileOutputStream and BufferedOutputStream. Are there any general guidelines for what to use to read/write quickly to the SD card? For example, BufferedOutputStream seems as if it should make things faster but I'm unsure the buffer size should be set for. Specifically, I want to read/write byte arrays that are ~1Mb in size as quickly as I can.

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HTC EVO 4G :: PC Can't Write To SD Card

Sep 18, 2010

When I plug my Evo into my PC, I can browse and view all the files on the SD Card, however, when I try and write something to the card windows gives me an error. I have tried creating a directory on the card using the Astro App and I can create a directory from the phone.

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General :: Can't Write System Files In HUAWEI Honor C3

May 9, 2014

I have tried to update my Honor C3 system updates. Then I noticed that I have completely lost root access. They removed su binary. Then I tried to root again my Honor C3 with VROOT and it is OK again. But I can't overwrite system files such as changing system DroidSans-fallback.ttf fonts and also installing framework of Xposed (Overwriting app_process). I can't even delete system files also.

I searched for firmware files for my phone and I can't seems to find it. There is root access and I even test it via Terminal Emulator app and from ADB. Calling su binary in Shell was OK but I can't access /system well. H30-U10

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Android :: ARM Directly Read / Write File On Sd Card I/O Without Cache

Nov 16, 2010

I need to directly read/write a file on sd card without cache. I can use "posix_fadvise" to achieve the purpose on Ubuntu I try NDK to make the function call, but it seems disabled on Android How can I do?

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Android :: Write / Read Access To SD Card In Manifest File

Mar 1, 2010

Is there a right associated with write/read access to the sd card that needs to be set in the manifest.xml file? I'm currently trying to write to the sd card using a standard FileOutputStream here:

FileOutputStream out = new FileOutputStream("/ sdcard/images/"+imageName);
bmp.compress(Bitmap.CompressFormat.JPEG, 90, out);

But it doesn't seem to be working. It just says the location isn't found, which can happen if there are no permissions to read/write to the location.

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General :: How To Read / Write To Apps Shared Prefs Files Within App

Feb 19, 2012

I want to add a feature to my app so i can backup so that the user can backup certain shared_prefs files of other apps (located in data/data/package,name/shared_prefs). I dont want to modify them, just backup and overwrite.

My app has root privileges.Ive tried this a few times but i cant get it to work, im just getting a file not found error when uploading.Ive tried mounting data/ as read/write but that didnt work or i did it wrong.

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Android :: Application To Write SMS With PC Keyboard

Aug 5, 2009

I send a lot of sms messages everyday and I'd like to write them using my PC keyboard... then this text should be sent to my Htc Magic which sends it to a specified number. I used to do that with Nokia PC Suite... Is there any software.

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Android :: Possible To Write Vala Application

Jun 14, 2010

Is it possible to write a Vala application and get it to run on an Android device?

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General :: Can't Write To SD Card Over WiFi

May 19, 2014

My S4 died from a smaller than hairline crack in the display - Cha-ching! $175The cat knocked my laptop-the same one on which I had just successfully re-flowed the video chip-off on the floor, breaking, of course!, the screen - ~$50 (when I get around to it)

Now, the first time I try to add some new tunes to my "new" phone, I can't manipulate any data on its SD card via WiFi. I can write, delete, move, rename, anything I want to/from the card from within the phone itself. Just not over WiFi.

I thought it was perhaps the app I was using so I tried another but same thing. The best error code I get is the highly informative "Operation Failed"-Period.

Is there some setting somewhere that holds sway over the ability to write to the SD card?

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General :: Write In External SD Card?

May 15, 2012

Specs: ainol novo elf 7 tablet A10 processor. it has android market. (google play )

ICS 4.0.3, kernel version 3.0

it came with some chinese apps etc (identifying which rom it was, i believe it was factory rom).I ask torrents to download in my sd card, it says error , permission denied .

EXT CARD SIZE: 2 gig only. manufactuer says tab supports upto 32 *gig card...card wroks fine on my nokia x2-00 phone

Investigation:

1)i tried creating directory in using File manager...it did, ...it didnt show option of deleting / pasteing something.
so i used es file explorer........when I asked it to delete that empty directory i created , it said error permission denied.

2)i try to paste something, it fails.

3)i try to delete something it fail.

So, FORMATTED the memory card (via pc...connected it as usb, formatted, ejected), TRY TO PASTE SOMETHING via tablet, it fails

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