I want to ask how to create new file with adobe air so i can write it.....
And how to put it in our current project?
I have seen so many resource, but they used existed file that created manually and only update it content...
Thanks Alot
everything is explained (with sample code) in the documentation:
flash.filesystem.FileStream
flash.filesystem.File
Reading and writing files (Adobe AIR 1.0 and later)
private var fileReferenceSave:FileReference= new FileReference();
private function onSaveText():void
{
fileReference.save(myText.text,"myText.txt");
}
Related
I have the two following methods and I am using them to store a special value locally and be able to access it on application restart:
(Store value locally:)
private void SaveSet(string key, string value)
{
ISharedPreferences prefs = PreferenceManager.GetDefaultSharedPreferences(this);
ISharedPreferencesEditor prefEditor = prefs.Edit();
prefEditor.PutString(key, value);
// editor.Commit(); // applies changes synchronously on older APIs
prefEditor.Apply(); // applies changes asynchronously on newer APIs
}
(Read it again:)
private string RetrieveSet(string key)
{
ISharedPreferences prefs = PreferenceManager.GetDefaultSharedPreferences(this);
return prefs.GetString(key, null);
}
This works perfectly. Now is it possible to access and edit this Shared Preferences externally? Unfortunately, I cannot find any file when searching in folder
Phone\Android\data\com.<company_name>.<application_name>\files
nor anywhere else. I want / try to edit this value from my computer, after connecting the phone to it. Is this possible?
Alternatively: Can anyone maybe show me how to create a new file in the given path above, write/read it programmatically and how it stays there, even if application is closed / started again? So I can then edit this file with my computer anyhow?
I tried it with the following code, but unfortunately it doesn't work / no file is created or at least i cannot see it in the given path above:
//"This code snippet is one example of writing an integer to a UTF-8 text file to the internal storage directory of an application:"
public void SaveValueIntoNewFile(int value)
{
var backingFile = Path.Combine(System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal), "newFile.txt");
using (var writer = System.IO.File.CreateText(backingFile))
{
writer.WriteLine(value.ToString());
}
}
Would be very happy about every answer, thanks in advance and best regards
What you're looking for is where Android stores the Shared Preference file for applications that make use of it's default PreferenceManager.
I'd refer to this SO post which answers your question pretty well
SharedPreferences are stored in an xml file in the app data folder,
i.e.
/data/data/YOUR_PACKAGE_NAME/shared_prefs/YOUR_PREFS_NAME.xml
or the default preferences at:
/data/data/YOUR_PACKAGE_NAME/shared_prefs/YOUR_PACKAGE_NAME_preferences.xml
SharedPreferences added during runtime are not stored in the Eclipse
project.
Note: Accessing /data/data/ requires superuser
privileges
A simple method is to use Android Device Monotor,you can open it by clicking Tools--> android-->Android Device Monotor...
For example:
The path in my device is as follows:
/data/data/YOUR_PACKAGE_NAME/shared_prefs/YOUR_PACKAGE_NAME_preferences.xml
And we notice three buttons in the upper right corner of the picture.
The first one is used toPull a file from the device,the second one is used to Push a file onto the device,and the last one is used to delete the preferences.xml file.
So we can pull the preferences.xml file from current device to our computer and edit it as we want, and then push the updated preferences.xml to the folder again.Then we will get the value of preferences.xml file .
I try to develop several WP8 apps using the same credentials for all(same user and password).So if the user choose to change his credentials he does only once in one app and it will change for all.
Until now i used Isolatedstorage to save the credentials(as shown below) but im wondering if the files would be accessible by all the apps...i guess they would not.
So what solution do you have ?
thanks for your help
public static void SaveToFile(byte[] Encryptedfile, string FileName)
{
using (var SaveApplicationFile = IsolatedStorageFile.GetUserStoreForApplication())
{
SaveApplicationFile.DeleteFile(FileName);
using (IsolatedStorageFileStream fileAsStream = new IsolatedStorageFileStream(FileName, System.IO.FileMode.Create, FileAccess.Write, SaveApplicationFile))
{
using (Stream writer = new StreamWriter(fileAsStream).BaseStream)
{
writer.Write(Encryptedfile, 0, Encryptedfile.Length);
}
}
}
}
You can't access IsolatedStorage of other App.
Nor you can't save on SD card.
Maybe consider using Skydrive or other exteral storage.
Another idea, I'm thinking about - maybe you can use MediaLibrary and Save Picture there. And use this picture as a container for some data - maybe using Steganography ;)
So I'm trying to dynamically create a folder inside the web pages folder.
I'm making a game database. Everytime a game is added I do this:
public void addGame(Game game) throws DatabaseException {
em.getTransaction().begin();
em.persist(game);
em.getTransaction().commit();
File file = new File("C:\\GameDatabaseTestFolder");
file.mkdir();
}
So everything works here.
The file get's created.
But I want to create the folder like this:
public void addGame(Game game) throws DatabaseException {
em.getTransaction().begin();
em.persist(game);
em.getTransaction().commit();
File file = new File(game.getId()+"/screenshots");
file.mkdir();
}
Or something like that. So it will be created where my jsp files are and it will have the id off the game.
I don't understand where the folder is created by default.
thank you in advance,
David
It's by default relative to the "current working directory", i.e. the directory which is currently open at the moment the Java Runtime Environment has started the server. That may be for example /path/to/tomcat/bin, or /path/to/eclipse/workspace/project, etc, depending on how the server is started.
You should now realize that this condition is not controllable from inside the web application.
You also don't want to store it in the expanded WAR folder (there where your JSPs are), because any changes will get lost whenever you redeploy the WAR (with the very simple reason that those files are not contained in the original WAR).
Rather use an absolute path instead. E.g.
String gameWorkFolder = "/path/to/game/work/folder";
new File(gameWorkFolder, game.getId()+"/screenshots");
You can make it configureable by supplying it as a properties file setting or a VM argument.
See also:
Image Upload and Display in JSP
getResourceAsStream() vs FileInputStream
I have the following requirement for a business application:
(All of this could be on local or server)
Allow user to select folder location
Show contents of folder
Print selected items from folder (*.pdf)
Display which files have been printed
Potentially move printed files to new location (sub-folder of printed)
How can I make this happen in Silverlight?
Kind regards,
ribald
First of all, all but the last item can be done (the way you expect). Due to security protocols, silverlight cannot access the user's drive and manipulate it. The closest you can get is accessing silverlight's application storage which will be of no help to you whatsoever in this case. I will highlight how to do the first 4 items.
Allow user to select folder location & Show contents of folder
public void OnSelectPDF(object sender)
{
//create the open file dialog
OpenFileDialog ofg = new OpenFileDialog();
//filter to show only pdf files
ofg.Filter = "PDF Files|*.pdf";
ofg.ShowDialog();
byte[] _import_file = new byte[0];
//once a file is selected proceed
if (!object.ReferenceEquals(ofg.File, null))
{
try
{
fs = ofg.File.OpenRead();
_import_file = new byte[fs.Length];
fs.Read(_import_file, 0, (int)fs.Length);
}
catch (Exception ex)
{
}
finally
{
if (!object.ReferenceEquals(fs, null))
fs.Close();
}
//do stuff with file - such as upload the file to the server
};
}
If you noticed, in my example, once the file is retrieved, i suggest uploading it to a webserver or somewhere with temporary public access. I would recommend doing this via a web service. E.g
//configure the system file (customn class)
TSystemFile objFile = new TNetworkFile().Initialize();
//get the file description from the Open File Dialog (ofg)
objFile.Description = ofg.File.Extension.Contains(".") ? ofg.File.Extension : "." + ofg.File.Extension;
objFile.FileData = _import_file;
objFile.FileName = ofg.File.Name;
//upload the file
MasterService.ToolingInterface.UploadTemporaryFileAsync(objFile);
Once this file is uploaded, on the async result, most likely returning the temporary file name and upload location, I would foward the call to some javascript method in the browser for it to use the generic "download.aspx?fileName=givenFileName" technique to force a download on the users system which would take care of both saving to a new location and printing. Which is what your are seeking.
Example of the javascript technique (remember to include System.Windows.Browser):
public void OnInvokeDownload(string _destination)
{
//call the browser method/jquery method
//(I use constants to centralize the names of the respective browser methods)
try
{
HtmlWindow window = HtmlPage.Window;
//where BM_INVOKE_DOWNLOAD is something like "invokeDownload"
window.Invoke(Constants.TBrowserMethods.BM_INVOKE_DOWNLOAD, new object[] { _destination});
}
catch (Exception ex) { System.Diagnostics.Debug.WriteLine(ex.ToString()); }
}
Ensure you have the javascript method existing either in an included javaScript file or in the same hosting page as your silverlight app. E.g:
function invokeDownload(_destination) {
//some fancy jquery or just the traditional document.location change here
//open a popup window to http://www.myurl.com/downloads/download.aspx? fileName=_destination
}
The code for download.aspx is outside the scope of my answer, as it varies per need and would just lengthen this post (A LOT MORE). But from what I've given, it will "work" for what you're looking for, but maybe not in exactly the way you expected. However, remember that this is primarily due to silverlight restrictions. What this approach does is rather than forcing you to need a pluging to view pdf files in your app, it allows the user computer to play it's part by using the existing adobe pdf reader. In silverlight, most printing, at least to my knowledge is done my using what you call and "ImageVisual" which is a UIElement. To print a pdf directly from silverlight, you need to either be viewing that PDF in a silverlight control, or ask a web service to render the PDF as an image and then place that image in a control. Only then could you print directly. I presented this approach as a lot more clean and direct approach.
One note - with the temp directory, i would recommend doing a clean up by some timespan of the files on the server side everytime a file is being added. Saves you the work of running some task periodically to check the folder and remove old files. ;)
I basically downloaded a file name custom.mp3 into my isolatedstorage and I can see it via isolatedstorage explorer....
The question here is... How can I access the particular custom.mp3 via URI?
So far I got this.. but I wonder why it is not working:
alarm.Sound = new Uri("isostore:/custom.mp3", UriKind.Absolute);
Your path is wrong. Nothing else is wrong with your code. Post the code you're using for saving the mp3 file in the first place, if you want further help.
For easier reading, the code to store the MP3 goes something like this..
string alarmfile = "custom.mp3";
isolatedStorageFileStream = new IsolatedStorageFileStream(alarmfile,FileMode.Create,isolatedStorageFile);
long songfilelength = (long) e.Result.Length;
byte[] songbyte = new byte[songfilelength];
e.Result.Read(songbyte, 0, songbyte.Length);
isolatedStorageFileStream.Write(songbyte, 0, songbyte.Length);
isolatedStorageFileStream.Flush();
Only files packaged in the XAML can be used as alarm sound:
Remarks
The Sound URI must point to a file packaged in the application’s .xap
file. Isolated storage is not supported. When the alarm is launched,
the sound is played quietly and then gradually increases in volume.
There is no way to modify this behavior.
From:
Alarm.Sound Property