adobe air :: File handling

• The static properties included in File class :

File.applicationStorageDirectory  A unique storage directory unique for each installed AIR application
File.applicationDirectory  Directory where the application is installed and it is read only
File.desktopDirectory  Desktop directory of the User
File.documentsDirectory  Documents directory of the user
File.userDirectory  User Directory

• saving file:

1. var bytearray:ByteArray = new ByteArray();
2. var fileToCopy:File = new File("url of file");
3. var newFile:File = new File("url of file to be created");
4. var fileStream:FileStream = new FileStream();
5. fileStream.open(file,FileMode.READ);
6. fileStream.readBytes(bytearray);//getting bytes
7. var newFileStream :FileStream = new FileStream()
8. newFileStream.openAsync( newFile, FileMode.WRITE );
9. newFileStream.writeBytes(bytearray);//filling bytes
10. newFileStream.close();

• Updating file

public function update(value:String,url:String,startIndex:int = 0):void
{
   var file:File = new File(url);
   var fs:FileStream = new FileStream();
   fs.open(file,FileMode.UPDATE);
   fs.position = startIndex;
   fs.writeUTFBytes(value);
   fs.close();
}

• Getting current directory in air:

1. NativeApplication.nativeApplication.addEventListener(InvokeEvent.INVOKE, onInvokeEvent);
2. public function onInvokeEvent(invocation:InvokeEvent):void {
3.         var currentDir:File = invocation.currentDirectory;
4. }




• File systems's tutorial:

http://labs.adobe.com/wiki/index.php/Apollo:Articles:Apollo_Local_File_System

• Draggout out gesture [Dragging file from air to filesystem]
  
  • demo :   http://codingangry.com/demos/dragDemo/
  • http://www.adobe.com/cfusion/communityengine/index.cfm?event=showdetails&productId=4&postId=14306
  • Simple demo :  http://meamit.wordpress.com/2009/05/22/148/
• Uploading file in air

http://www.flex888.com/296/9-flex-file-upload-examples-visited.html