Solved

openDataOutputStream() File system error (12)

Posted on 2010-09-23
1
1,051 Views
Last Modified: 2013-12-15
the code on line "outstream = fileconn.openDataOutputStream();" (full code attached below) throws an exception with message "File system error (12)" ?

the funny thing is that the exception is not thrown the first time the WriteXml(); is called i.e. on first call during every lifetime of the application, the file writing completes successfully, but all subsequent calls after the first one fail and throw this file system error??? our application works by first reading an xml file, and then writing one (WriteXml()) if the user presses Save (which works first time), but if the user presses Save again, the writing does not work any more.

when i close the application and start it again, the first save works fine again, but not the following ones? any ideas how to solve this issue?


cheers.

import javax.microedition.io.Connector;
import javax.microedition.io.file.FileConnection;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import net.rim.device.api.ui.component.Dialog;
import org.kxml2.io.KXmlParser;
import org.kxml2.io.KXmlSerializer;
import org.kxml2.kdom.Document;
import org.kxml2.kdom.Element;
import org.kxml2.kdom.Node;

public class Filer {

	
private String filepath = "file:///SDCard/Blackberry/TelliT.xml";
	private String ip = "192.168.1.1";
	private String port = "80";

public void WriteXml() {

try {
			FileConnection fileconn = (FileConnection) Connector.open(filepath,
					Connector.READ_WRITE);
			if (!fileconn.exists()) {
				fileconn.create();
			}

			Document doc = new Document();
			Element root = doc.createElement("", "TelliT");
			Element server = doc.createElement("", "server");

			Element ipelem = doc.createElement("", "ip");
			ipelem.addChild(Node.TEXT, ip);

			Element portelem = doc.createElement("", "port");
			portelem.addChild(Node.TEXT, port);

			server.addChild(Node.ELEMENT, ipelem);
			server.addChild(Node.ELEMENT, portelem);

			root.addChild(Node.ELEMENT, server);
			doc.addChild(Node.ELEMENT, root);

			DataOutputStream outstream;

			outstream = fileconn.openDataOutputStream();
			KXmlSerializer serializer = new KXmlSerializer();
			serializer.setOutput(outstream, "UTF-8");
			doc.write(serializer);
			fileconn.close();

		} catch (Exception e) {
			Dialog.alert("Data could not be saved: " + e.getMessage());
		}

}

}

Open in new window

0
Comment
Question by:KristjanLaane
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
 

Accepted Solution

by:
KristjanLaane earned 0 total points
ID: 33764844
0

Featured Post

Salesforce Has Never Been Easier

Improve and reinforce salesforce training & adoption using WalkMe's digital adoption platform. Start saving on costly employee training by creating fast intuitive Walk-Thrus for Salesforce. Claim your Free Account Now

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Are you developing a Java application and want to create Excel Spreadsheets? You have come to the right place, this article will describe how you can create Excel Spreadsheets from a Java Application. For the purposes of this article, I will be u…
In this post we will learn how to make Android Gesture Tutorial and give different functionality whenever a user Touch or Scroll android screen.
This tutorial covers a practical example of lazy loading technique and early loading technique in a Singleton Design Pattern.
The viewer will learn how to use and create new code templates in NetBeans IDE 8.0 for Windows.
Suggested Courses

751 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question