I created an android application. This application calls C native library which requires save a temporary file to /cache. However the permission for /cache is wrxwrx--- with uid=cache and gid=system. so the application is not allowed to save a file to /cache.
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I'm currently trying to create a buffer for my application which needs to be big!I mean at least 1MB but most likely to be 4MB.Now definitely bad idea to actually allocate this much on a byte array in memory.So the options are put all the data in a file. So question is where do I place this temp file?
Option 1: Store to sdcard. Might be slow and not such a good idea for continuous read/writes?
Option 2: Store to in the apps cache.I read somewhere this is fast for read/ writes. But also read before issues cleaning up the cache after use? I guess I should as if I be able to create a file in cache and discard it when I don't need it? Any tips/look outs from using this methods would be greatly appreciated!
In my MediaPlayer application for streaming Video i am using the following code File temp = File.createTempFile("mediaplayertmp", "dat"); while running it throws exceptions like
Parent directory of file in not
writable:/sdcard/
mediaplayertmp43912.dat
I dont how to handle this problem, and i want to know that when we execute that code means where the file will be created.
What's the best way to create a temporary file in Android? Can [File.createTempFile][1] be used? The documentation is very vague about it.
View 1 Replies View RelatedI need to copy some content (which is in the form of a byte array, now) into a temporary file and save it in .PNG format on android.
View 5 Replies View RelatedA friend got an error on his HTC Desire trying to install an app. He uses eclipse for installing.
The error from LogCat: E/PackageInstallationReceiver( 244): Remove /data/local/tmp/my.package.apk Fail! W/System.err( 244): java.io.IOException: Error running exec().
I used adb shell to see whats inside this tmp folder. And there was no such apk. So I renamed another, but the error stays which means, that he never really tries to delete this apk, right? The same code runs fine on the emulator and my Nexus One.
There are a couple of options within the browser I didn't find until after searching for it, so I thought I would share it with the rest of the community in order to help out.
-Everyone should clear the browser cache and previous history in order to save internal phone memory. To do this go to BROWSER press the MENU button and press MORE. There should be a list of things in there but what you should be interested in is the last item which is SETTINGS. From there in privacy settings there will be options to clear both cache and history.
- Another little tip I wanted to share was viewing webpages in landscape mode without opening your keyboard. To do this simply press the MENU button from within the BROWSER and go down to FLIP ORIENTATION. You should realize tho by doing this you browser will continue to be in landscape the next time it's used. In order to return it to it's normal portrait mode just follow these steps once again.
-There are a number of other things you can mess around with or find with the MENU button within the browser so just take a look at it yourself even if you don't want to do any of these tips.
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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View 2 Replies View RelatedAfter using Odin to update firmware on my Galaxy Player 5.0 (model g70cwy/xaa), I can no longer get it to start. I get the Failed to mount /cache (no such file or directory) (see attached screenshot.
I tried the factory rest option, it does not seem like any of the options on this screen works.
OK, before I start, it's about an LT15i. I don't know what's happening, but at some .FTFs Flashtool does not show the file list (middle column) and neither "wipe cache" or data and one FTF has the "wipe cache" option only. This is really annoying. Tutorials specify a download link for a specific FTF and after starting Flashtool and selecting the flash option, that FTF is not showing up properly. Should I download an earlier version of the program?
View 2 Replies View RelatedIn cm roms, dalvik cache of system apps are generated in /cache but those data/apps are generated in /data. Is there any way to disable this behaviour? Cache partition in our phones is too small. In AOSP and AOKP and stock roms, dalvik cache is always generated in /data no matter whether its a system app. any way to achieve this in cm roms?
View 1 Replies View Related"Unable to save file to SD card due to insufficient file permissions."
This is the message I get when I try to take pictures. I have only taken 9 shots so far. There was no problem until yesterday when i tried to take the tenth. Did I do something to cause this? I am not that tech smart
I am trying to find the best way to save files to the phone. Basically I have an XML file on a web server that I would like to be able to save on the phone. Should I create a specific folder in my project to save to and if so how do I save the file. Or should I make it to where when you click the Save button it checks for an SD card and if there is and SD card create a folder (if one isn't already there) and save the file in the new folder or save it to the phone? If someone could explain the most efficient way of saving files for my app and how to save the file from the web server I would greatly appreciate the insight. Any tutorial links would be awesome.
View 7 Replies View RelatedI'm using org.w3c.dom.Document to create a document and I need now to write it into a .XML file. I saw tutorials referring the Java.XML.transform.Transformer package but this one is not available in the Android platform.
View 5 Replies View RelatedI'm trying to use a standard Intent that will take a picture, then allow approval or retake. Then I want to save the picture into a file.
View 2 Replies View RelatedDoes someone know how to save and restore an object to a file on android ?
View 2 Replies View RelatedI am still not able to save a picture when I send an intent asking for a photo to be taken. Here's what I am doing:
Make a URI representing the pathname
android.content.Context c = getApplicationContext();
String fname = c.getFilesDir().getAbsolutePath()+"/parked.jpg";
java.io.File file = new java.io.File( fname );
Uri fileUri = Uri.fromFile(file);
Create the Intent (don't forget the pkg name!) and start the activity
private static int TAKE_PICTURE = 22;
Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE );
intent.putExtra("com.droidstogo.boom1." + MediaStore.EXTRA_OUTPUT, fileUri);
startActivityForResult( intent, TAKE_PICTURE );
The camera activity starts, and I can take a picture, and approve it.
My onActivityResult() then gets called. But my file doesn't get written.
The URI is: file:///data/data/com.droidstogo.boom1/files/parked.jpg
I can create thumbnail OK (by not putting the extra into the Intent), and can write that file OK, and later read it back).
Is it possible for the App to create a new file/asset and write this into the /assets directory. The reason being, that's the only way I can tell webkit will load a local file/resource.
View 10 Replies View RelatedWhen I saved a file or open a dir under sdcard dir, it always complains:"Parent directory of file is not writable: /sdcard/myfile, java.io.IOException: Parent directory of file is not writable" Any idea what's wrong?
View 2 Replies View RelatedI want to save images from a particular URL into the sqlite db and then display it from the database..Can anyone tell me as how i could do that.
View 3 Replies View RelatedHow can i save a Bitmap instance to a *.bmp file?Anyone knows? Is it strange that we can only save a bitmap instance to a png or jpg file?
View 7 Replies View RelatedI've yet to find a way to save emails to the SD Card on my Motorola Droid using OI File Manager. Is it possible, or am I trying on the wrong app?
View 6 Replies View RelatedI'm implementing an image cache system for caching downloaded image.
My strategy is based upon two-level cache:
Memory-level and disk-level.
My class is very similar to the class used in the droidfu project
My downloaded images are put into an hashmap and the Bitmap objet is wrapped inside a SoftRererence object.
Also every image is saved permanently to the disk.
If a requested image is not found into the Hashmap<String,SoftReference<Bitmap>> it will be searched on the disk, readed, and then pushed back into the hashmap. Otherwise the image will be downloaded from the network.
Since I store the images into the phisical device momery, I have added a check for preserve the device space and stay under a 1M of occupied space:
CODE:.................
This method is called sometime afte a disk writing:
CODE:..............
What I'd like to add is the same check on the HashMap size to prevent it will grow too much. Something like this:
CODE:.....................
My question is:
What could be a right MAX_MEMORY_SIZE value? Also, Is it a good approach? A good answer also could be: "Don't do it! SoftReference is already enough"
I want to let the users send me the logs from the device i wonder how do i extract the logs in to a file on the device ?
View 2 Replies View RelatedSay I have some simple class and once it's instantiated as an object I want to be able to serialize its contents a file, and retrieve it by loading that file at some later time.. I'm not sure where to start here, what do I need to do to serialize this object to a file?
View 2 Replies View RelatedHow do I save the contents of an array to a file and then read it again later? I have a small amount of data that will need to be stored and since I have no idea where to start on using a SQLite database, I think this will work a lot better.
View 6 Replies View RelatedI love how SharedPreferences work in android and I would like to know if there is an easy way to save them to another file so I could load a previous instance of the prefs and vice versa. Basically when you load this file, all the preferences would change to how you had it before at once. I want to be able to swap 3 or 4 different versions of the same pref keys in this way. Is there an easy way to do this?
View 1 Replies View Relatedok, flashed with myns rom, titanium backed up everything and only restored user apps. Anyone know which system file to restore that had my scenes saved? I didn't want to restore all of them, don't know if that would matter or not. But i would like the scenes file restored.
View 1 Replies View Relatedwhere is located the temporary folder in the android phones?
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