problems about creating files

[yeliya]

Hi:
I want to create a file on the S60 emulator and my IDE is Eclipse 3.2.Here is my code:

private void createfile()
{
try{
FileConnection fc=(FileConnection)Connector.open("file:///C:/new.txt");
if(!fc.exists()){
fc.create();
System.out.println("correct");
}
fc.close();

}catch(IOException ioe){
System.out.println("error happens");

}
}

But error occurs:

Exception in handleDisplayableEvent. Reason: SecurityException
source is : javax.microedition.lcdui.List@191b191b
p0 is : 16
p1 is : 0
p2 is : 0
java.lang.SecurityException: Access denied
at com.symbian.midp.io.protocol.file.FileConnectionImpl.open(Unknown Source)
at com.symbian.midp.io.protocol.file.Protocol.openConnection(Unknown Source)
at com.symbian.gcf.ProtocolBase.openConnection(ProtocolBase.java:72)
at com.symbian.midp.io.protocol.file.Connection.createConnection(Unknown Source)
at com.nokia.mj.impl.vmport.J9GcfConnectionBase.setParameters2(Unknown Source)
at javax.microedition.io.Connector.open(Unknown Source)
at javax.microedition.io.Connector.open(Unknown Source)
at MobileFileBrowser.creatfile(Unknown Source)
at MobileFileBrowser.commandAction(Unknown Source)
at javax.microedition.lcdui.Displayable.callCommandAction(Displayable.java:164)
at javax.microedition.lcdui.Displayable.commandEvent(Displayable.java:137)
at javax.microedition.lcdui.Displayable.handleEvent(Displayable.java:179)
at javax.microedition.lcdui.List.handleEvent(List.java:356)
at javax.microedition.lcdui.Toolkit.handleDisplayableEvent(Toolkit.java:526)
at com.symbian.lcdjava.lang.SystemExtensions._dispatchCallbacks(Native Method)
at com.symbian.lcdjava.lang.SystemExtensions.dispatchCallbacks(SystemExtensions.java:35)
at com.symbian.midp.runtime.KVMEventProcessor.run(KVMEventProcessor.java:23)

COULD ANY ONE WHY THIS HAPPENS OR WHAT COULD I DO TO SOLVE THE PROBLEM?
THANKS!

[csbhushan]

Hi,

C: in S60 is READ ONLY. Thats the reason why you are not able to create files there.

Try running the following code.

            FileConnection conn = (FileConnection) Connector.open("file:///C:/",Connector.READ);
            if( !conn.canWrite() )  {
                form.append("C:/ Read only\n");
            } else {
                form.append("c: can  write\n");
            }
            
            conn.setFileConnection("data/");
            if( !conn.canWrite() )  {
                form.append("c:/data/ Read only\n");
            } else {
                form.append("c:/data/ can  write\n");
            }

Result:
c:/ can not write
c:/data/ can write

Better option would be to check if the directory you are in is writable before trying to create a file.

CSB

[yeliya]

Thanks for csbhushan's reply.
I have changed the code to FileConnection fc=(FileConnection)Connector.open("file:///C:/Data/new.txt");
But it still throws out an java.lang.SecurityException. So what could i do now or where should i create the file?Or just because the emulator can't create files?
Hoping for your replies.
Thanks in advance.

[navyseai]

I'm having the same problem? found any solution?

[Osam]

Hi,

Use the Code to write the File..

try
{
String path = System.getProperty("fileconn.dir.photos");
FileConnection fc = (FileConnection)Connector.open(path+"New.txt",Connector.READ_WRITE);

// Create the file if it doesn't exist
if (!fc.exists())
{
fc.create();
}
long memoryAvailable = fc.availableSize();
OutputStream os=null;
os = fc.openOutputStream();
os.write(data_toWrite);
os.flush();
os.close();
}
catch (Exception e)
{
System.out.println("The Exception is="+e);
}

It's working fine on the emulator, but when u deploy on device then give the permission on device to write the data. If u not give the permission on device then device throws a Security exception.

Thanks
Osam

[jitu_goldie]

CHECK THE SUITE SETTINGS OF APPLICATION IN APP MANAGER.
FOLLOW THE INSTRUCTIONS:
APP MANAGER -> UR APPLICATION -> CLICK OPTIONS -> CLICK SUITE SETTINGS -> CHECK READ WRITE PERMISSIONS -> SET THEM TO ALLOW FROM NOT ALLOWED


TRY AND REPLY..