BlackBerry: Saving file to text file

Question

I was willing to make a simple application that stores data in a text file according to this entry but I am facing a frustrating exception.

This is my code:

private boolean saveFile(String fileName, String fileContent) {
         DataOutputStream os = null;
          FileConnection fconn = null;
        try {
        fconn =   (FileConnection)Connector.open(fileName,Connector.READ_WRITE);
          if (!fconn.exists())
                fconn.create();
        os=fconn.openDataOutputStream();
        String myString=fileContent;
        os.write(myString.getBytes());
        os.close();
        fconn.close();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            Dialog.alert(e.toString());
            return false;
        }
        return true;
    }

private String getFileName() {

        return "file:///SDCard/BlackBerry/documents/text.dat";

    }

This is the exception I get:

 net.rim.device.api.io.file.FileIOException: File system error

The API says the following:

IOException - if the firewall disallows a connection that is not btspp or comm.

which I don't know if might be helpful or not.

I am using BlackBerry JRE 4.6.1 and a BlackBerry 8900 Simulator. Hope you guys can help me out.

Your requirement is save the text file but in the getFileName() method you are giving "filename.dat". For text file it should be "fileName.txt". and what exception you are getting? — alishaik786, Jan 12 '12 at 06:19
You can check the value returned by `FileIOException.getErrorCode()`. — Rupak, Jan 12 '12 at 06:22
@Tamar `fconn = (FileConnection)Connector.open(fileName,Connector.READ_WRITE);` is throwing the exception — Jorge, Jan 12 '12 at 13:03
@Rupak `file:///SDCard/BlackBerry/documents/text.dat` is the value of `fileName`. This file does not exist. I want to create this new file with the contents of `fileContent` — Jorge, Jan 12 '12 at 13:05
I managed to make it work reinserting the SD card. Thanks anyway. — Jorge, Jan 12 '12 at 13:54
@George, well done. And 1003 stands for `FileIOException.NO_SUCH_ROOT`, from http://www.blackberry.com/developers/docs/6.0.0api/net/rim/device/api/io/file/FileIOException.html — Rupak, Jan 12 '12 at 16:19

score 1 · Answer 1 · edited May 23 '17 at 11:48

1

Check that your simulator has mounted SDCard. If your is autostart you have to wait until system is completely powered up and SDCard is mounted: example

And the final - you have to close streams and file connection at the end of failed operation also.

edited May 23 '17 at 11:48

Community

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answered Jan 12 '12 at 06:28

Eugen Martynov

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score 1 · Answer 2 · answered Jan 12 '12 at 13:52

1

Ok, the answer is tricky. I kept trying with the same code over and over until I started to think that it was a problem related to the simulator so what I did is, before running the application, I removed and inserted the SD card using the Options item from the Blackberry interface menu and that was it. It worked like charm. I guess it is a bug in the simulator.

answered Jan 12 '12 at 13:52

Jorge

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Is your program multithreading? Could be that you are trying to save data in the same file at the same time? Check another JRE or another simulator. I would blame simulator issue as last option from list of possibilities. – Eugen Martynov Jan 12 '12 at 19:33

BlackBerry: Saving file to text file

2 Answers2