Android :: Reading And Writing To File In Internal Storage

Jun 27, 2010

I'm writing a simple budget app for myself, and I'm having trouble figuring out how to write to internal storage. I don't seem to be writing to the file properly and I can't find any more in depth examples than the Data Storage article on developer.android.com. Basically, I'm trying to write a test float to the MyBalance file, then read it into balance. In my actual code I use try/catch statements around the file in/out operations but I skipped them to make the code more readable.

float test = 55; float balance; byte[] buffer = null;
FileOutputStream fos = openFileOutput( "MyBalance", Context.MODE_PRIVATE );
fos.write(Float.floatToRawIntBits(balance));
fis.read(buffer); //null pointer
ByteBuffer b = ByteBuffer.wrap(buffer);
balance=b.getFloat();

That's the gist of it, anyone see what I'm doing wrong? I went ahead and converted to/from String but I still don't think the file is being created. I have an if statement that reads from it if it exists in onResume() and it isn't being run. Lemme post some of my code. Here's how I'm writing the file, (setbal is an EditText and balanceview is a TextView):

balance = Float.valueOf(setbal.getText().toString());
balanceview.setText(setbal.getText());
balstring = String.valueOf(balance);
for (int i = 0; i < balstring.length(); ++i)
try { fos.write((byte)balstring.charAt(i));
} catch (IOException e) { e.printStackTrace();
}
I check if the file exists in onResume() like so:
File file = new File("data/data/com.v1nsai.mibudget/balance.txt");
Is that where an internal file for that context would be stored?

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Writing Text To Internal Storage

Mar 12, 2014

Im trying to write a string to a text file on the phone internal storage

i use the following code

protected void writefile() {
String FILENAME = "filedemo.txt";
String content = txtMessage.getText().toString();
try {
FileOutputStream fos = openFileOutput(FILENAME,MODE_PRIVATE);

[Code]...

I understand this writes it to the internal storage in data/data but I want it to store in a folder called "Datafiles" which I can access via my PC or using a file manager.

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Android :: Writing - Reading From A File Simultaneous

Oct 27, 2010

I'm trying to read from a file while it still opened for witing.

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Android :: Attaching Txt File While Email From Internal Package File Storage

Jun 8, 2010

I am successful in creating file using openFileOutput(). and can read the file using openFileInput().

I am able attach file from external storage sdcard while emailing the same using getExternalStorageDirectory as sendIntent.putExtra(Intent.EXTRA_STREAM, Uri.parse("file://"+Environment.getExternalStorageDirectory()+"/ zibra.txt"));

But while trying to attach file from the openOutputFile stored area using sendIntent.putExtra(Intent.EXTRA_STREAM, Uri.parse("file://"+ getFilesDir() + "/zibra.txt"));, resulting emptied file emailing.

My file is stored in "/data/data/com.example/files/zibra.txt".

what is going wrong in it?

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

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Android :: How To Delete File From Internal Storage?

Aug 24, 2010

I have used the android internal storage to save a file for my application (using openFileOutput) but I would like to delete that file, is it possible and how?
thanks maxsap.

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Creating JPEG File In Internal Storage

Aug 14, 2012

I am writing a code for an android app in which I have to captures image and save it into internal storage of android. For this I have written the following code-

Code:

Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
String newPath = PATH+"/"+folderName+"/"+imageName+".jpg";
File file = new File( newPath );
file.mkdirs();

[Code]...

This code creates jpeg file but don't write the image into it.

Later I tried writing following code in onActivityResult-

Code:

protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
Bitmap bitmap = (Bitmap) data.getExtras().get("data");
ByteArrayOutputStream bos = new ByteArrayOutputStream();
bitmap.compress(CompressFormat.PNG, 0, bos);
byte[] bitmapdata = bos.toByteArray();

[Code]...

But its still not working.

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Android :: Application That Reads File From Internal Storage On Startup

Aug 3, 2010

I am writing a app that reads a file from the internal storage on startup. I have followed the guildelines here:
http://developer.android.com/guide/topics/data/data-storage.html#file...
It successfully works on the emulator, and I can find the file my app created under
DDMS > data > data > com.MyAppName > files.

Now I would like to install my app on a real device, but do I need to explicitly copy the file onto the device? If so, what's the location should I copy the file to? Or will the file be created when I install my app? I need some pointers or guidelines, I'm quite clueless about the device. Or perhaps if anyone knows any keywords for me to search for an answer.

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Android :: Storing Image And Audio File In Internal Storage

Sep 18, 2010

How to store image and audio files in android internal storage and how to retrieve back to display image imageview.

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General :: Sony Xperia SP - How To Recover File In Internal Storage

Dec 21, 2013

I dnt know what Ive done last night But all the files in my internal storage are disappeared. I mean the image file. So any way to find the file out? My device is a Sony Xperia SP , which is rooted but with locked BL. there are too many important and valuable photos there.

Never ask me to use MSC mode instead of MTP, as my photos are save in internal memory Undelete and Remote for Android are tried but useless

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Android :: How To Do EXIF Reading And Writing

Jun 17, 2009

I've been looking around on the net and in this group, but i have not found any java package that can read and write EXIF data.

I tried Sanselan. They say they don't use ImageIO/AWT, but they actually do use AWT. The class can not be loaded because there is an AWT dependency:

CODE:......

What i want is not so much creating my own EXIF data, but preserving a JPEG's meta-data (EXIF). I'm planning to load a JPEG, edit its bitmap and write it out again to a(nother) JPEG with the same meta-data as its original.

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Android :: Serial Ports Reading / Writing?

Aug 16, 2010

I've had an inquiry about whether my Android app can interface with a serial device via USB cable. Before I invest too much time in this path, I'd like to know: Is this even possible? Some previous threads indicate Android won't do host USB. Would it require root access and/or the NDK? Would it be better to advise the potential client to look for a serial blue tooth adapter? I can see that there is a Blue tooth Sock class which may do the job.

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Android :: Reading / Writing Data To Serve

Jun 19, 2010

I'm writing an app that will periodically send information out to a remote server, and then get relevant information about other users from that server back to the local database.What's the best way to handle sending out this info (i.e.: XML or binary) and writing it to the remote server.Also,how can I assure that, when 500+ users' data get's to the server or FTP (or better alternative?) at once, the appropriate fields gets overwritten or added, without skipping any or overwriting the entire thing?

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Android :: Public Calendar API For Reading / Writing Event Data?

Jan 7, 2010

Is someone from Google able to advise when the Android SDK is likely to include a public API for reading/writing event data to the user's calendar? Searching the forums I see that this is a much desired feature by many developers but I haven't seen any indication as to when (or even if) this need will be addressed.

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Android :: Download Here Library For Reading - Writing EXIF From Your JPEG Images

Jul 23, 2009

Android does not provide an Exif Reader or Exif Writer in its SDK (it has a native implemenation, though, but that API is private).

The Sanselan library, however, does provide a full fledged set of functionality for reading and writing Exif metadata.

However, Sanselan pur sang cannot be included in an Android Project. It references classes and packages that do not exist under the current version of Android (e.g. ImageIO).

Therefore, I made a quick cut of Sanselan 0.97, cutting out all the classes that prevent it from being used on the Android platform. It is a quick cut and it may have some issues. However, I got its exif reading and writing to work for my application and it looks like its working quite well. Reading and writing raw image-data is, however, not possible in this cut. This has been cut out.

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General :: 2 Small Internal Storage - How To Swap SD To Be Main Phone Storage?

Aug 23, 2013

I've bought this chinese clone of the SIII, it's a MT6575. It's great except for the internal storage, which supposedly is 500MB but there seems to be an invisible SD storage which is 2GB. It's really confusing... When I go to Settings -> Storage there are 3 memories: "Internal Storage" (claims to be 4GB but it's fake, it's actually 500MB), "Phone Storage" (claims to be 16.5GB but it's probably 2GB), and finally my SD, "SD Card" (32GB).

The thing is, I'm having problems downloading big apps because apps go to "Internal Storage" which is 500MB only, and which files are stored in the "Phone Storage" (maybe internal & phone are actually the same?). However when I go to Settings -> Apps, on the "Downloaded" tab, the apps are in "Internal Storage" (500MB), and on the "On SD Card" tab, it shows that apps are in "Phone Storage" (the ones I moved to SD). This means my 32GB SD isn't being used by the system when I send apps to SD probably.

Also, my 32GB SD card is found in /mnt/sdcard2, and the /mnt/sdcard... I don't know which storage is that.

So basically all this is happening because I tried to Link2SD with my 32GB SD doing all the 2 partitions stuff and so, but Link2SD never detects the "secondary SD" which is the 32GB SD, as this fake SD card, "Phone Storage", is probably what the programs thinks to be the SD card.

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HTC Incredible :: Trouble Mounting Internal Phone Storage And Sd Storage

Aug 22, 2010

For some reason my Incredible won't mount both the internal phone storage and the SD card storage at the same time. What I mean is...when I plug my phone into my PC I only get a single popup asking to mount the phone's SD card storage, but not the internal phone storage.If I remove the SD card (or unmount the SD card using menus on the phone) and then toggle the connection type from Disk Drive, to Charge only, and then back to Disk Drive (to burp the connection), the internal phone storage will mount, but the SD card won't mount because it has been removed.When I connect my wife's incredible, my computer sees both the SD card storage and the internal storage (as expected) and gives me prompts for both. I took the SD card from the problematic phone and put it in the "good" phone and there are no issues at all (IE.. both the internal storage and SD storage mount). This of course means there is no issue with the SD card.

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Jelly Bean :: Does Extending Internal Storage From Phone Storage Possible

Nov 19, 2013

I bought my new phablet that was powered by 4.1

im shocked with how the manufacturer of my device(cherry mobile) designated their storage. the phone storage is 2gb and internal is 500 mb.

it is not a problem if i could write apps on phone storage by default but even though the 'write to phone storage' is checked, when i downloaded an app, the internal storage still losses free space.

so is it possible to extend internal storage?

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HTC Desire :: What's Difference Between INTERNAL Storage And SYSTEM Storage?

Aug 18, 2010

I used this to check the amount of space on my A2SD partition of my SD Card. However I've noticed that as well as INTERNAL storage, there's something called SYSTEM storage. Which is considerably bigger than whats left of my internal space.Is the INTERNAL used for Multimedia files as this thread suggests?Internal Storage vs Phone Storage.If so. How come my multimedia files have ended up there, when they've always been saved to my SD card.

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General :: How To Move OBB Data From Internal SD To Internal Storage

Jan 5, 2014

I have a xperia u, which has not external SD card slot..

Data partition is MUCH bigger than what I need (I'm using 500mb of 2gb) and I want to move obb files to data partition to free some space in SD partition..

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HTC Incredible :: Internal Storage Vs Phone Storage

Jun 7, 2010

Sorry if this is a complete NOOB question, but what is the difference between the internal storage which is 6.6GB and the phone storage, which is about 750MB? How do I access the 6.6GM of storage? What am I missing here?

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Android :: Writing To Internal SD Card

Aug 28, 2010

Is there any way of accessing the internal SD card on Android devices that have internal flash, internal SD and external SD cards?

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Sony Ericsson Xperia X10 Mini/pro :: How To Transfer File Betwen Phone Storage And SD Storage?

Sep 22, 2010

i just download some applications from the Market then suddenly got warning phone storage getting low. So is there anyway to transfer the files from phone storage to SD storage ??? PLease anyone who knows about it to inform me coz i stuck with this problem.

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Writing TXT File To SD Card

Aug 24, 2013

I have an app that is working, all is cool. Now, it has textview object, and I would like to save that content to *.txt file, in a "simple" way (not for me obviously). I have a simple button, and by clicking it I would like to save *.txt file to SD card, (root of the card is ok).

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HTC EVO 4G :: Dissapearing Internal Storage

Jun 29, 2010

Is anybody else getting missing internal storage?

This has been happening since I got the phone on launch day. This is my first Android phone so maybe this is supposed to happen. But when I reboot the phone, internal memory disappears.

As a test I didn't install or uninstall any apps, didn't get any updates, nothing. After two days I reset the phone and was at 327 megs of storage. After the reboot I had 320. This has been happening every few days.

I thought it was from installing an app. In one example I had 360 megs, installed an app that brought me to 357, did a reboot after a few mins, and had 354 at startup.

I've tried this on another phone (my girlfriend has one) and she gets the same thing. I've tried wiping my phone just to be sure and same thing.

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HTC Incredible :: What To Do With Internal 6.6GB Storage?

Aug 25, 2010

Most apps cannot see this, and I doubt they ever will unless this becomes more commonplace. What do you do with your internal storage? I have my camera set to store there, but I have a slideshow app i use when charging and it only reads the SD card so I move the "keepers" to SD. My mp3's and divx movies are also on SD. So out of 6.6gb internal storage I usually have about 6.5gb free. How do you use yours? And do you feel app developers will ever write apps to access the internal storage?

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HTC Incredible :: Why Internal Storage So Low?

May 18, 2010

Capacity: 6.60GB
Available: 3.86GB

I'm just wondering if this is normal. I don't have any music or videos stored internally, only about 30 or so wallpapers. Is the space all from apps? How do I see exactly what is in the internal storage? When I connect to my computer there's nothing in any of the folders except the wallpapers I added.

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HTC EVO 4G :: Internal Phone Storage

Jun 5, 2010

I went into the SD/Phone storage in Settings and I know the Evo comes with 1gb of internal storage, but mine is showing I only have 332mb left. I only downloaded 3-5 apps.On another note: Is there anyway to access the SD card from the phone? Can I save pictures from the web onto it, instead of onto the phone?

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Android :: Writing To CSV File Via OpenCsv

Aug 22, 2010

I try to write to a Csv file via:mFileWriter = new FileWriter("/sdcard/program/file");mCsvWriter = new CSVWriter(mFileWriter);At the moment it throws an exception that the file doesn't exist.It's true that the file doesn't exist. What's the easiest way to create the file?

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Android :: Internal Storage On Emulator

Nov 6, 2010

I have an app that pulls album art from the media store. It works fine on my N1 and other devices with external SD cards. However, I need to get it working on devices with internal storage and I don't have such a device to test on. How can I set up the emulator to reproduce such a device? I did a search on the forums and found info on increasing the size of the internal storage but I'm not sure how the file system should be set up. Is this even possible?

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Android :: Setting Internal Storage In AVD

Aug 30, 2009

Does anyone know how to set internal storage in the AVD to something other than the default 92M? I have tried setting hw.ramSize in the AVD's .config file, but no change and also tried setting it when creating a AVD with the "android create" command. Same net result. I'm on Windows XP.

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Android :: Internal Phone Storage Low - What To Do?

Aug 17, 2010

Why do I only Have about 25mb of storage I see others with much more on their Droid and they have 60mb or more. What can I do to add mb?

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HTC Incredible :: Use Internal Storage For Music

Oct 7, 2010

My 8GB SD storage card is nearly full while my internal phone storage has over 6 GB available. Is it possible to use the internal storage for music, my biggest storage hog. I'm concerned about running out of space on the SD card for the various backups required for exploring new ROMs.

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Android :: What Are Limits Of Internal Storage?

Jan 12, 2010

1) Our Android app will store data in a built-in SQLite DB. I see the DB can throw android.database.sqlite.SQLiteFullException, but there's no exact info in API what is the limit. Could anyone tell what are the size limits for a DB in order not to get into the SQLiteFullException? I assume DB will store data in device's internal storage (versus SDCard). Am I right? Given SQLite DB is just a file, probably the DB size is limited with free internal storage space. Again - Am I right? If yes, then what is the internal storage size on Android? How to detect it? Does it vary on a device model basis or OS version basis? 2) We'll also need to save app settings. I think SharedPreferences will fit nicely. However the question is - are SharedPreferences saved to the internal storage too? If yes, then is it the same storage where the DB stores its file?

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HTC Incredible :: Internal Phone Storage

Sep 28, 2010

So, one of the selling points of this phone is the large amount of internal storage. any ROMs out there that actually recognize my large amount of internal storage?? I would rather have 512MB like a droid and get a 16GB card with it honestly. If stock froyo wasn't slow as hell I would just use that but alas, I need my speed.

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HTC Desire :: Internal Storage Keeps Rising / Fix It?

Aug 4, 2010

I have the Internal memory Widget on my homescreen and in the past few hours the amount of internal memory used has jumped from 92mb/147mb to 118mb/147mb. I'm struggling to figure out why.

I have Mobile Internet enabled as always, and I use several well know apps and widgets like Sky News, BBC News, Chomp SMS, Twitter, Facebook for Android, etc. I've checked every app using Settings > Applications > Manage Applications and only a couple of apps had a cache size over 1mb, most didn't have stored data at all. Facebook had about 4.5mb of cache data, but all this adds up to a total much less than the 26mb increase that the memory widget is reporting.

Anyone know what could be filling the storage?

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HTC Incredible :: Phone Have Not 8gb Internal Storage / Why Is So?

Jul 26, 2010

When i look into my sd card and phone storage option in says i have 6.60 gb of total space? Why is this

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URL Of Files Stored In Internal Storage

Oct 17, 2012

in my App I want to generate some html files and store them in the internal storage. In my WebView I want to open the generated html by clicking a link. Does a Url to the stored file exist? Something like "internal://mygeneratedfile.html"?

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General :: HTC Vivid - Where Did All Internal Storage (16 GB) Go

Jun 7, 2013

I have an HTC Vivid which has a total of 16 GB internal space. Or at least it did. I had been running a JB custom ROM, but was bored today so I decided to flash a custom ICS one.

I backed up all my personal stuff to my PC, and wiped everything from recovery -- both caches, factory/data, system, and for good measure the internal sdcard (so there wouldn't be any potential conflict with the JB installation.

After I booted up, I checked the storage stats, and I now have around 6 GB total. Where's the rest, and what should I have done differently? It seems as if a partition isn't mounted or something. Is this space retrievable?

HTC PH39100 using Tapatalk 2

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General :: Mount Internal Storage With UMS?

Aug 11, 2013

I'm using an EVO LTE, but this question should apply on using Android device that has internal storage and an external card slot.

I'm trying to use my EVO LTE as my sole media player (specifically, the internal storage). Connecting it to the PC and getting the files onto it are no big deal (of course I do need to use MTP, which I hate). Now on to the problem:

I'd like to be able to use the device connected to my car's USB port. Being able to pick through my media using the car stereo controls is a big plus for me, and worked great when I had an iPod (which I don't anymore, not getting into that).

Of course, the car stereo's USB connection doesn't support MTP, only Mass Storage, at least as far as I can tell (It's a stock stereo in a Fit). I get a compatibility type of error currently when I try to connect my phone using the 'HTC Sync Manager' USB option in the phone (which mounts the device using MTP). The 'Disk Drive' option of course only mounts the external card.

what I'd love to be able to do is mount the internal storage via USB Mass Storage. I'm not sure if this is currently doable, but my forum-scouring to date leads me to believe that it is not.

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General :: Increase Internal Storage

Jun 4, 2013

My's friend's phone is an Alcatel 918 Mix. It has 170Mb storage for apps. But when he want install ex:. Angry Birds, he got an error don't have enough space for it. His device's rooted.. and also have 16gb sd card.. can we increase with it his storage to could be able to instal more apps..

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General :: Apps From Internal Storage To SD

Feb 25, 2014

Been getting a message that my storage is low and need to move my apps to an sd card. i just purchased an sd card and moved my apps. but they have vanished, though from my available storage i can see they are still there. How do i retrieve my apps.

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General :: Can't Access Internal SD Storage?

Nov 9, 2013

So the other day I was trying Cyanogenmod 9 on my galaxy pocket, however I didnt realize it wasn't an official release and it was REALLY bugged and I made a huge mistake because i forgot to install CWM. Thing is installed this rom and I belive i pretty much bricked my phone because now I can't get access to any of my networks, wi-fi, bluetooth, or usb mass storage or my sd card are not being recognized either...

What I've tried so far was sending the stock rom through Quick ADB Pusher, but it tells me that even though my phone appears to be root It wont allow it to access, then I tried different ways to root and unroot because apparently SU is not giving me the permissions. So finally tried my last option with ADB and was trying an adb push but I keep getting permision denied if I send it to /root or read only file if I send it to /system also tried Asb shell $su but I keep getting a denied message.

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Android :: Possible To Attach File To Email Without Writing To SD?

Dec 2, 2009

My application stores data locally in the native SQLite db, and I want to allow users to export this data by emailing themself a .csv file. In order to do this I'm generating the .csv from the database and writing it to the SD card, then attaching it to an email:String Builder csv = generateFile();writeFile(csv.toString(),"file.csv");Intent email = new Intent(android.content.Intent.ACTION_SEND);email.setType ("application /octet -stream"); email.putExtra(android.content.Intent. EXTRA_ STREAM, Uri.parse ("file://sdcard/file.csv")); Which all works great. What I'm wondering, though, is if it is possible to skip the step of writing to SD first, and directly attach the data.

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Android :: How To Split File Into Chunks While Writing Into It?

Sep 24, 2009

I tried to create byte array blocks from file whil the process was still using the file for writing. Actually I am storing video into file and I would like to create chunks from the same file while recording. The following method was supposed to read blocks of bytes from file:

private byte[] getBytesFromFile(File file) throws IOException{
InputStream is = new FileInputStream(file);
long length = file.length(); int numRead = 0;
byte[] bytes = new byte[(int)length - mReadOffset];
numRead = is.read(bytes, mReadOffset, bytes.length - mReadOffset);
if(numRead != (bytes.length - mReadOffset)){
throw new IOException("Could not completely read file " + file.getName());
} mReadOffset += numRead; is.close(); return bytes;
}

But the problem is that all array elements are set to 0 and I guess it is because the writing process locks the file. Any other way to create file chunks while writing into file.

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Android :: Writing To File Assets Folder

Nov 16, 2009

Can any one give the code to read and write to a file in the Android assets folder.

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