Accessing the 'Media' directory of a Blackberry within the JDK

Question

Trying to use JSR 175 to access media saved under the '/home/video/' directory on the device. Using Blackbery JDK 4.6.1. Single line of code throws a 'filesystem io error' exception. Which is, as usual, unhelpful in the extreme.

fconn = (FileConnection)Connector.open("file:///home/user/videos/"+name, Connector.READ);

Has anyone tried to do this? I can open files within my jar, but can't seem to access the media folder. I have the javax.microedition.io.Connector.file.read permission set and my app is signed.

Answer 1

There are two kind of filesystems on BlackBerry - SDCard and store. You have to use one of them, defining it in the path. Standard directory on SDCard where video, music etc stored is "file:///SDCard/BlackBerry".

 String standardPath = "file:///SDCard/BlackBerry";
 String videoDir = System.getProperty("fileconn.dir.videos.name");
 String fileName = "video.txt";
 String path = standardPath+"/"+videoDir+"/"+fileName;
 String content = "";
 FileConnection fconn =  null;
 DataInputStream is = null;
 ByteVector bytes = new ByteVector();
 try {
  fconn = (FileConnection) Connector.open(path, Connector.READ);
  is = fconn.openDataInputStream();

  int c = is.read();
  while(-1 != c)
  {
   bytes.addElement((byte) (c));
   c = is.read();
  }

 } catch (IOException e) {
  // TODO Auto-generated catch block
  e.printStackTrace();
 }
 content = new String(bytes.toArray());
 add(new RichTextField(content));

See also
SUN Dev Network - Getting Started with the FileConnection APIs
RIM Forum - Some questions about FileConnection/JSR 75
Use System.getProperty("fileconn.dir.memorycard") to check if SDCard available
How to save & delete a Bitmap image in Blackberry Storm?