Android :: How To Create/write File In The Root Of The Device
Jan 17, 2010
I found out that you can use something like this to create a file:
CODE:............
When running the above code I get an IllegalArgumentException stating:
CODE:......
And Im guessing the "/" is not appreciated. I wanted the "/" since I need to write the file to the root directory of the device, as stated in the API in trying to follow:
CODE:.........
Question is: how do I place a file in the root-directory? I have been looking around for an answer, but havent found one yet.
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Aug 28, 2010
As a newbie, I have been reading posts in learning how to do different functions.Using the Hello World example, I added a textview object to this application but the results come back as false on the screen.
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Feb 24, 2010
I am very new to android and i have wrote an application that reads the Cell ID information , now i want to create a text file and store the information inside , i have googled this issue but i couldn't find a solution that really worked.
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Oct 26, 2010
I am trying to create a file ,if it doesnot exist and tried to write some data to it. The same program I did in java, it was running fine.But when I try to do the same thing in Android I am getting NullPointerException at the place where I am trying to write data to file. And also, I did not find any new file in the current directory .
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Jul 12, 2009
I need to write a fairly simple .csv file to the device's sdcard (so it can then be emailed via Intent). The below code does not write the file.
CODE:...........
More code here:
I flush and close out_stream. I can even seem to be able to read from the file on the device (printing above output, using fileinputstream, to an edittext.
How can I get to this file on the sdcard?
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Apr 5, 2013
I want to write an apk file in device external memory (Not in Ext SD card) by downloading url.using
Environment.getExternalStorageDirectory() able to write in memory and the same working in some devices other than Samsung grand, Duos and samsung note 1.
Why its not working in those devices and how can i make my check generic for all devices.
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Dec 3, 2009
I want to create file dir when apk installing ondevice. does it possible?and how?
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Jun 21, 2012
I just want to know how to create ur own root file for android and wat tools ar needed.i don't want to download , i want to create root file of my own
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Oct 29, 2010
I have a standalone GPS enabled data recorder in my car that can function as either a USB host or device. (Its a class 0x00h USB device). I currently connect to it via a WM 6.5 app running on my Palm Treo 750. I would like to port my WM 6.5 app to an Android phone. (I don't have a specific Android phone in mind, I would like it to be as generic as possible).Replicating the GUI is not that difficult, but I am having trouble getting started on the USB communication. I'd appreciate it if someone could point me towards an example, or the appropriate tutorial.
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Sep 9, 2013
I have a cell phone which name is Huawei Ascend P1. Now I have a problem, that is the devices can not bootup into Android's home and I can not write anything into flash, even using fastboot.
When booting, the screen stays on the welcome logo, and stay there forever, and adb could connect to linux shell on the phone. I can see all file on the phone, and I can save files after "mount -o remount / /", but after reboot, the file is gone.
If I use fastboot to flash a recovery into my phone, by follow command:
fastboot flash recovery recovery.img
The command line prompt says OK, but when it reboots, it still reboot into the previous recovery.
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Nov 8, 2010
in my application I have strings.xml file under values folder. strings.xml file contain array. Now I want to add element to that array at runtime. How to do that?
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Apr 4, 2009
I would like to know how to write to file. I have tried using OutPutStream out = new FileOutPutStream(fileName); out.write(byte [], 0, length);This way always returns Parent directory or File is not writable.I have also used openFileOutPut(fileName, MODE_PRIVATE) method but this method works properly if it is called from the same class which has extended Activity and I am writing to the file in different class and that too in different thread.I have tried to get the Application Context through getApplciationContext and call openFileOutPut method but still theres something wrong that I am doing.So please can someone suggest me a proper way to write to a file.
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Nov 21, 2010
I am trying to write an XML file to a url e.g. http://myIPAddress/myFolder/myFile.xml
I am using an Apache2 server for my tests on Ubuntu 10.10
Output line example (ignore apostrophe):
<'myEntity id="1" name="me" />
Also, i want to able to reopen the connection anytime and add lines to the end of the file.
I'd post my attempt here for correction but it's a sad one.
I am trying OutputStreamWriter with URLConnection, please correct me if i should be using a different approach.
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Feb 17, 2010
How do I create a shared directory with read/write permissions to all applications installed on my phone and that is not on the sdcard?
I tried that :
File f = new File("/tmp");
f.mkdir();
but it is not working.
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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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Apr 30, 2010
im just trying to save some text to a file on android and while it works fine on the emulator "dont crash", when i try it on my phone it crashes, what am i doing wrong?i do know it crashes on " File root = Environment.getExternalStorageDirectory(); " i just dont know why. showMes() is just a function to make toast.
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Sep 26, 2010
This should be trivial, but for whatever reason I can't find any easy way to do this. Coming from C# where this is a 1 line call, I don't understand why Java makes this so complicated, and on top of that android leaves even that out of its libraries. Anyway all I want to do is write an
org.w3c.dom.Document
that I have populated to a xml file. It should be as easy as opening a stream and writing document.toString(). But that doesn't work. My hope is I'm just missing something.
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Apr 17, 2009
I wrote a file to the sdcard, but it failed as follow:String sdcardFIle = "/sdcard/xxx.txt" FileOutputStream fos = openFileOutput (sdcardFile, Context. MODE_ WORLD_ WRITABLE ) ; openFileOutput failed, because fIle "/sdcard/xxx.txt" contains a path seperator. It is so strange. Is there another way to handle the situation?
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Mar 31, 2010
I'm trying to save a file in a subdirectory in Android 1.5.I get a exception saying I can't have directory separator in a file name ("/"). I'm missing something of working with files in Android..I thought I could use the standard Java classes but they don't seem to work.I searched the Android documentation but I couldn't fine example and google is not helping me too.I'm asking the wrong question (to google).
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May 27, 2010
i'm having this issue of not being able write text file into the SDCard. I'm running the program through eclipse on a HTC magic version 2.1. i had the USB cable unplugged before i run the program. It says that the parent directory of file does not exist: data2/ abc.text
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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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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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Jan 21, 2010
Might sound crazy, but it's what I need to do. I want to take a Bitmap object and use the XMLPullParser/XmlSerializer to write this to a flat file. Obviously I will need to read the XML tag back into a Bitmap object.So somehow I have to turn my Bitmap into a String and then turn that String back into a Bitmap. I will do some searches on Base64 to see if I get any good examples.
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Jul 6, 2010
M trying to write a file using openFileOutput, using the following snippet: I have to use this file, myfilename.text, later in my native code. To reference it I must know it's path. Anyone knows where does openFileOutput create the file and if it can be opened in my native code using the path, as in would there be any permission issues. Code...
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Jan 18, 2010
I need to be able to write textfiles to the root directory of my Android device (as this related questions explains).
Can I change write permissions for root directory / and if so, how?
I tried pushing a file using adb, but it said file system was read-only
Its pretty annoying that I cannot control my own device, that everything is so restricted
EDIT 1:
This thread has evolved into discussing Sygic Navigation and their API, which seems to be wrong when it comes to the Android platform. I have some other questions that discuss Sygic and their navigation software.
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Jul 30, 2010
I am trying to take a dump of encoded data stream to a file. I had added the code to make the file dump in pvmf_omx_enc_node.cpp file, in the Fillbufferdoneprocessing () function. But i am getting the error 'permission denied' for fopen("/sdcard/enc_bitstream.bin,"wb+""); what i need to do to enable the permission to write to sdcard
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Jul 24, 2010
My program contains a file with the name "size.text", which contains just a word "15". If a user choose a value from a spinner,say 17, then the chosen value should be stored in the file and replace "15". I have added the permission to the program <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission> But somehow i can not make the chosen value be written to the file. Here is my code...
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Jun 4, 2009
I've developed an Android App. that takes a picture and save it on gallery. The problem is that I don't know how to write a Bitmap/byte[] data which I get from taking pic. to the gallery in .jpg/.png format.
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Oct 6, 2010
In my application, I use MediaPlayer to record audio to a file.Can I read the file at the same time?
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Mar 13, 2010
how to read/write log data into a text file in android that file should be res folder.
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