Android :: How To Save An Object To File?
Sep 2, 2010Does someone know how to save and restore an object to a file on android ?
View 2 RepliesDoes someone know how to save and restore an object to a file on android ?
View 2 RepliesSay 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 RelatedI have a Timer in my application, and would like to allow the user to set the timer, and maybe cancel it in another execution of the application. To do that, I need to have a reference to the Timer created in the first execution. How can I obtain that? Is there a way of storing/retrieving memory addressed?
View 3 Replies View RelatedI created an application with loging and an arraylist to fill a ListView.
If i am calling or i need to check my mail, sometimes i lost the context of my application (variables and the listview !)
It is a little complex to save arraylist in SharedPreferences and i am not an expert in SQLite.
Do you know a solution to keep persistent my data (variables and the arraylist) during the use of my application?
I need to know how he takes drawable object. I'm collecting some ImageView objects in array, they have background images that are rather big in resolution so they take lot of memory...
I have read somewhere that it will automatically create image with resolution that my imageView have, so i think it will take less memory than first one. Please tell me, if i set scaleType property, will it scale that image? Will that help me to save memory?
I want to convert this into a File object, and only a File object - I need to pass it to another constructor that requires a File. How can I convert a URI like this to a File object? If I try File newFile = new File(myURI);I get an error in Eclipse suggesting that I should convert the URI to a String. Supplying URI.getPath() in the constructor doesn't help either.
This relates to the 'How can I convert android.net.uri object to java.net.uri object?' question, which unfortunately seems to have no good answer, but I want a File object out, not a java uri. I don't mind if I have to write it to a bytestream and back again - whatever is the best way.Apologies if I'm cross-posting my own question, but I thought I might need to make things a bit clearer.
Does anyone know how to construct a typeface object from a file? Say i have a .ttf file on the SD card, how do i load it into my app?
View 5 Replies View RelatedIn the Tab2 of TabActivity in the APIDemo example, it has this method to create a View object for each tab. code...
Can you please tell me how can I create a View for each tab from an xml layout file? For example code...
I have a library that takes a File object as a parameter to one of the functions.
I am getting the file like this:
this.openFileOutput("myFile", MODE_PRIVATE)
I need to load this file from the system, however, I don't know how to convert FileOutputStream to File. Or is there another way of doing this?
I want to do some automated testcase with Instrumentation . Suggest that my AUT has 2 Activity. After clicking the button in ther first Activity, the second one will be shown with new content base on what we enter in the first Activity.) Instrumentation provides us the function called startActivitySync() and return the Activity object for processing. My question is how we can get the pointer of the second Activity after the it is shown by clicking the button on the first activity.?
View 2 Replies View RelatedI would like to convert a Picture object to Bitmap object in memory, without writing data to disk.
View 2 Replies View RelatedI have an Activity that running on system. I can get the Intent that is used to start the activity. But i don't know how to get the Activity object from the Intent object or something else. Can anyone tell me how to do this??? Note that, I don't use Instrumentation object.
View 11 Replies View RelatedIs there a way to load an image file into an ImageView object, and then define a transparent color for this object?
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 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).
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.
View 4 Replies View RelatedIs 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 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 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 RelatedHow do I save, retrieve, and delete pdf files?
View 2 Replies View Relatedcan a whole 2d or 3d array be saved to a file ,,all at once or does it have to be one number at a time? if so what do i have to look up?
View 2 Replies View Related