Android :: Reading And Writing To File In Internal Storage
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?
View Complete Thread with Replies
Sponsored Links:
Related Forum Messages:
Android :: Attaching Txt File While Email From Internal Package File Storage
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:...................
View Replies!
View Related
Android :: Application That Reads File From Internal Storage On Startup
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.
View Replies!
View Related
Android :: How To Do EXIF Reading And Writing
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.
View Replies!
View Related
Android :: Serial Ports Reading / Writing?
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.
View Replies!
View Related
Android :: Reading / Writing Data To Serve
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?
View Replies!
View Related
HTC Incredible :: Trouble Mounting Internal Phone Storage And Sd Storage
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.
View Replies!
View Related
HTC Desire :: What's Difference Between INTERNAL Storage And SYSTEM Storage?
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.
View Replies!
View Related
Android :: Download Here Library For Reading - Writing EXIF From Your JPEG Images
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.
View Replies!
View Related
Android :: Internal Storage On Emulator
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?
View Replies!
View Related
Android :: Setting Internal Storage In AVD
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.
View Replies!
View Related
Android :: What Are Limits Of Internal Storage?
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?
View Replies!
View Related
Android :: What Are Size Limits Internal Storage?
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.
View Replies!
View Related
Android :: Losing Internal Storage Space
I have a Motorola Droid that isn't rooted. In the last few weeks I've had problems with dropping free space on internal storage. I'm around 30MB free but it drops almost daily. I have deleted pics and text messages and have started deleting apps but the free space keeps dropping.Is there some way to figure out where this space is going or monitor for changes?
View Replies!
View Related
Android :: Internal Memory And External Storage
I've started seeing some apps that offer to read/write data to the internal phone memory (like Super KO Boxing 2, which offers to save a whopping 52MB to the phone memory). I suppose this is because newer Android devices have a lot of internal storage, as opposed to my devices, which have very little. I would like to support internal storage in my app as well. But it's a bit difficult to implement a solution to something that I don't really know how it works. For example, do these newer devices allow users to upload files to the internal memory, like it's possible to do with the SD card? Can someone explain internal storage from an user perspective and recommend strategies for supporting read/write operations both for internal and external memory (ie: letting the user choose which memory to use at startup, like the Super KO Boxing 2 app)?
View Replies!
View Related
Android :: Any Way To Set Emulator Internal Storage Size?
Is there a way to set the emulator's internal storage size? It is currently set to a fairly low value. Also, while searching for the answer to this question (which I didn't find), I ran across several threads which seemed to indicate that many phones have a very limited amount of internal storage. If I have an application which is 30 Mb (due to graphics and audio resources), is this going to be too large for most people to use. Should I be looking to install my application on the SD card instead (can this only be done on version 2.2 systems?).
View Replies!
View Related
HTC EVO 4G :: Dissapearing Internal Storage
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.
View Replies!
View Related
HTC Incredible :: What To Do With Internal 6.6GB Storage?
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?
View Replies!
View Related
HTC Incredible :: Why Internal Storage So Low?
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.
View Replies!
View Related
HTC EVO 4G :: Internal Phone Storage
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?
View Replies!
View Related
Android :: Copy Raw Data From Internal Phone Storage
I tried to copy my wiped data from my phone, so i have to read raw data with dd command. I have root and BusyBox v1.14.2 installed, but when i type: dd if=/dev/block/mtdblock5 of=/sdcard/testfile or even just dd if=/dev/block/mtdblock5 I get: dd: /dev/block/mtdblock5: Input/output error Why can't I copy the data?
View Replies!
View Related
Android : Increase ROM Size - Internal Phone Storage
I am facing problem here: http://stackoverflow.com/questions/3584297/installing-application-on-sd-card-in-android-sdk-2-2 , regarding application installation. In above question, you can view the image in which "Internal Phone Storage" is showing where only 43.38 MB is showing , and in latest android phone, i know it is coming with higher space, i have seen 13.45 GB in Samsung Galaxy Android Phone. But Right now, i am using HTC Hero, so my questions are: Is there any way to increase ROM size without any side-effect? How do i increase ROM Size?
View Replies!
View Related
HTC Incredible :: Internal Phone Storage
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.
View Replies!
View Related
HTC Desire :: Internal Storage Keeps Rising / Fix It?
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?
View Replies!
View Related
Android :: Application Access Permission To Files On Internal Storage
A question about the internal storage that's private to each application (especially when storing files with Context.MODE_PRIVATE). How is that storage actually assigned to the application? Just by package name or also somehow bound to the sign key of the app? Let's say I have installed application 1 and then write another application 2 with the same name and package name (just differently signed with different keys) and install it (app 2 replacing app 1), would that application 2 get access to the /data/data/[app]/files ? Or would I not even be able to replace app1 with app2 due to different sign keys in the first place?
View Replies!
View Related
Android :: Display Data In Internal Storage And Device Memory
How to read and display the data stored in the Internal Storage-private data on the device memory. String input=(inputBox.getText().toString()); String FILENAME = "hello_file"; //this is my file name FileOutputStream fos; try { fos = openFileOutput(FILENAME, Context.MODE_PRIVATE); fos.write(input.getBytes()); //input is got from on click button fos.close(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } try { fos1= openFileInput (FILENAME); } catch (FileNotFoundException e) {} outputView.setText(fos1./*I don't know what goes here*/);
View Replies!
View Related
Android :: Changing Permission On Files In Application Internal Storage?
I downloaded a file with an app and stored it inside of its internal storage, but the file is set with -rw- and I want to change those permissions so is it possible? I know that using external storage is an option but I want to know if I can do it with internal storage too. If it turns out that I can't change the permission is there some shared region of internal storage that I could use? I would like to not force the Android device user to have an SD card.
View Replies!
View Related
HTC EVO 4G :: Limited Internal Storage And Bigger SD Card
My internal storage is currently 337 MB. I was planning on buying a bigger SD card, either 16GB or 32GB. I'm very new to everything with Androids and have never been big with computers. I read that if I want a lot of applications and everything that I would have to root the phone because the internal storage is so limited and then move everything to the SD card. I tried rooting the phone, it didn't work (I didn't mess up anything with the phone, probably just missed a step), but considering I still know so little about all this I decided it would be better to wait with rooting. Will I be fine with not rooting my phone and picking up a bigger SD card or will my phone run very slow once I start installing a lot of stuff?
View Replies!
View Related
HTC Incredible :: Utilizing Internal Storage Ability?
Are we ever going to be able to utilize this storage with anything other than a file browser or the stock apps? One of the larger selling points to this phone was the fact that it had some internal storage. It is useful, pretty fast and it's right there. I was hoping that HTC would get right on this and have an update out, but I've yet to even hear HTC admit that there is even a problem. I don't remember being told that my internal storage would only be available with the apps that came stock on the phone. I, currently, have decided to keep my music on the internal storage. It frees up my SD card for storing stuff from apps and the like. I've got a couple short videos on the internal, too. I've got just over 2500 songs which weigh in just under 5 gigs, on my phone. I would love to be able to use TuneWiki or something that was a little better about getting and showing album covers, or even have a choice for a better music player and/or widget. I currently can't do that, because nothing seems to read the internal storage. Do we have any word that this is going to change in the near future. I know that we are all excited about the prospect of FroYo, soon, but what about this existing issue.
View Replies!
View Related
Samsung EPIC 4G :: Low Internal Storage Available Space?
I have not installed anything, not even an OTA update (except PRL update) and this is what it says for SD card and Internal Storage space. It comes with 1GB internal storage, so the base OS and TouchWiz used over half of the internal storage already along with over 1GB of the sd card? sd card total space: 14.73GB sd card available space: 14.73GB internal storage available space: 465MB
View Replies!
View Related
Media :: Saving Ringtones To Internal Storage?
I've been using the stock music player to trim songs and then set them as my ringtone, however every time I mount my SD card the ringtone reverts back to stock and I have to reset it. Is there a way/app that can let me trim a song, store the trim on the phone (not SD card) and then use it as a ringtone?
View Replies!
View Related
HTC EVO 4G :: Is 250MB Available Space Enough For Internal Phone Storage?
I installed a bunch of apps and I think the EVO has 1gb of space. Just wondering if that's enough available for me to do other things. I want to leave a "buffer" just in case. I'm currently using the Sandisk 8GB MicroSD Class 2 that came with the phone and when I was looking at selling my Touch Pro 2, it turns out that I have a Class 6 Transcend 8gb MicroSD card. I want to switch them out, if I just copy everything from the Sandisk to the Transcend, will that be ok? Or do apps/Android write the data a certain way that I'll have to re-do things again?
View Replies!
View Related
|
TRACKER
