File Browsing Problem

[Marwa]

Hi All,
I created a file browser midlet to browse the mobile's files and open a file..
i used jsr 75
the Application worked very good on emulators WTK2.2 & WTK2.5

BUT

I tried it on nokia phones n70,n72,n73,6630 ... didn't work on any of them
it just shows me a list containing the memory card, phone memory & if i selected one of them no folders are opened

i tried the solution of controlling the access mode from the mobile: manager-> suitesettings-> ask every time
but didin't work too...

plzzzzzzzzzz helpp me it's so urgent 4 me...
thanks

here is the code:
---------------

public class MobileXplorer2 extends MIDlet implements CommandListener
{
// For our file system, this will be our root
private final static String ROOT = "/";

// Definitions for directories
private final static String DIRECTORY_INDICATOR = "/";
private final static String UP_DIRECTORY_INDICATOR = "..";

// Holds the full path to the current directory.
// Point to the root at app startup
private String fullPath = ROOT;

// Our main display object
// List of files/directories in the current directory
List lstDirectory = null;

// Icons for directory, file, and move-up-one directory
Image imgDirectory = null, imgFile = null, imgUpDirectory = null;

private Command cmExit; // Command to exit
private Command cmSelect; // Command to select dir or file
private Command cmBack; // Command to "go back" one "screen"

/*--------------------------------------------------
* It all starts here. Check for FileConnection API,
* get images, create commands and allocate List
*-------------------------------------------------*/
public MobileXplorer2()
{
if (System.getProperty("microedition.io.file.FileConnection.version") == null)
{
System.out.println("FileConnection API not available");
destroyApp(false);
notifyDestroyed();
}
else
{
// Store references to our images for files and directories
try
{
imgFile = Image.createImage("/file.png");
imgDirectory = Image.createImage("/directory.png");
imgUpDirectory = Image.createImage("/up_directory.png");
}
catch(IOException e)
{ }

// Allocate the List that will hold directory contents
lstDirectory = new List(fullPath, List.IMPLICIT);

// Add commands and listen for events
cmSelect = new Command("Select", Command.ITEM, 1);
cmExit = new Command("Exit", Command.EXIT, 2);
cmBack = new Command("cmBack", Command.BACK, 3);
lstDirectory.addCommand(cmExit);
lstDirectory.addCommand(cmSelect);
lstDirectory.setCommandListener(this);

// Default command when selecting an entry in the List
lstDirectory.setSelectCommand(cmSelect);
}
}

/*--------------------------------------------------
* Get list of roots and display the List object
*-------------------------------------------------*/
public void startApp()
{
// Create a list of root directories
getRootDirectories();

// The List is our main displayable
Display.getDisplay(this).setCurrent(lstDirectory);
}

public void pauseApp()
{
}

public void destroyApp(boolean cond)
{
notifyDestroyed();
}

/*--------------------------------------------------
* Create a list of the valid root directories
*-------------------------------------------------*/
private void getRootDirectories()
{
// Get roots
Enumeration enumu = FileSystemRegistry.listRoots();

// Clear out the existing List contents
lstDirectory.deleteAll();

// Store entries in vector
while(enumu.hasMoreElements())
{
String root = (String) enumu.nextElement();
lstDirectory.append(root, imgDirectory);
}
}

/*--------------------------------------------------
* Build list of files in the specified directory
*-------------------------------------------------*/
private void buildFileList(String dir)
{
String fname;
Enumeration enume;
FileConnection fc = null;

try
{
// Open connection to the specified directory
fc = (FileConnection) Connector.open("file://" + dir,Connector.READ_WRITE);

// Enumerate the list of returned files/directories
enume = fc.list("*", true);

// Clear out the existing List contents
lstDirectory.deleteAll();

// Show image that represents going up one directory level
lstDirectory.append("..", imgUpDirectory);

// Loop through all entries, building a List
while(enume.hasMoreElements())
{
fname = (String) enume.nextElement();

// Open connection
fc = (FileConnection) Connector.open("file://" + dir + "/" + fname,Connector.READ_WRITE);

// Append the name, along with an indicator to the List,
// specifying if the entry is a file or directory
lstDirectory.append(fname, fc.isDirectory() ? imgDirectory : imgFile);
}

fc.close();

}
catch (Exception e)
{ }
}

/*--------------------------------------------------
* Directory selected, change to the directory
*-------------------------------------------------*/
void changeToDirectory(String dirname)
{
// Selected ".." directory, move up the tree
if (dirname.equals(UP_DIRECTORY_INDICATOR))
{
// Locate the next to last separator so we can remove the path
char separator = fullPath.charAt(0);
int x = fullPath.lastIndexOf(separator, (fullPath.length() - 2));

// Remove the last path entry, as we are moving up the tree
fullPath = fullPath.substring(0, x + 1);
}
else // Drilling down the directory tree
{
// Update variable that holds the full directory path
fullPath += dirname;
}

// We worked our way up the tree back to the root,
// build list of roots
if (fullPath.length() == 1)
getRootDirectories();
else
// Build a list of files/dir given the new path
buildFileList(fullPath);

// Show the new List
Display.getDisplay(this).setCurrent(lstDirectory);
}

/*--------------------------------------------------
* File selected, show its properties
*-------------------------------------------------*/
void displayFileProperties(String fullPath, String filename)
{
try
{
FileConnection fc = (FileConnection) Connector.open(fullPath,Connector.READ_WRITE);

// Build an alert to show file properties
Alert fileinfo = new Alert(filename,
"Last Modified " + new Date(fc.lastModified()) + "\n" +
"Write access: " + (fc.canWrite() ? "yes" : "no") + "\n" +
"Read access: " + (fc.canRead() ? "yes" : "no") + "\n" +
"File size: " + fc.fileSize(),
null, AlertType.INFO);

// Wait for user acknowledgement
fileinfo.setTimeout(Alert.FOREVER);

// Show the alert
Display.getDisplay(this).setCurrent(fileinfo);

fc.close();
}
catch (IOException ioe)
{ }

}

/*--------------------------------------------------
* Manage commands
*-------------------------------------------------*/
public void commandAction(Command c, Displayable s)
{
if (c == cmSelect)
{
// Get a reference to the selected List entry
String str = lstDirectory.getString(lstDirectory.getSelectedIndex());

// Depending on whether a file or directory was selected...
// Valid directories are "/" or ".."
if(str.endsWith(DIRECTORY_INDICATOR) || str.equals(UP_DIRECTORY_INDICATOR))
changeToDirectory(str);
else
{
// Pass in the full path (including the selected file name)
// as well as the filename itself
displayFileProperties("file://" + fullPath + str, str);
}
}
else if (c == cmExit)
{
destroyApp(false);
notifyDestroyed();
}
}
}

[axs]

Take a look at the example application in this guied, the FileConnection API Developer's Guide (with Example) v2.0: http://www.forum.nokia.com/info/sw.n..._0_en.zip.html

Will it run on the specified phones?

[matrix241]

Hi,
there is a difference in expressing the path for open a connection between wtk25 and nokia : I would suggest to make sure your path is the whole and correct path by putting it in output to the console(System.out) and checking it.

Best Regards

[soku123]

Hi Marwa,
roots in wtk and nokia are different.where wtk shows root1 and nokia has c: and d:.Not all folders can be browsed in case of nokia.it has restrictions there.i suppose images folder and its sub folders can only be browsed.check this with reading a file in each folder and if it cant it will throw an exception .check this with each folder.

Thanks
Soku

[Marwa]

Hi All,

Thanksssss alot for Ur help

The problem is solved (Y)

Thankss (F)

Marwa

[s4028469]

how exactly did you solve the problem marwa?

[milanexe]

Hi

I a also facing the same problem in Nokia n70 , only the directoy are diplay but not the sub directory and image , kindly help , so waht shoulr be th connector.open path

Thanks

Milan

[balagopalks]

Hi

I a also facing the same problem in Nokia n70 , only the directoy are diplay but not the sub directory and image , kindly help , so waht shoulr be th connector.open path

Thanks

Milan

Hi milanexe! Welcome to Nokia Developer discussion Boards!!

May be these docs on FileConnection could help!

MIDP: FileConnection API Developer's Guide (with Example) v2.0
http://www.forum.nokia.com/info/sw.n..._0_en.zip.html

Hope this blog is also of some interest
http://blogs.forum.nokia.com/view_entry.html?id=131

Are you getting any exceptions? What is the path you are trying to open?

Regards
Gopal

__________________
MobiQuil.com
An initiative by Developers for Developers.
http://www.mobiquil.com - Alpha - Launched.

[milanexe]

Hi BalaGopalks thanks for your reply . I am sending My code

---------------------------------

/**
* Show file list in the current directory .
*/
void showCurrDir() {
Enumeration e;
FileConnection currDir = null;
List browser;

try {
if (MEGA_ROOT.equals(currDirName)) {
e = FileSystemRegistry.listRoots();
browser = new List(currDirName, List.IMPLICIT);
} else {
currDir = (FileConnection)Connector.open("file://" +"localhost" + currDirName);
e = currDir.list();
browser = new List(currDirName, List.IMPLICIT);
// not root - draw UP_DIRECTORY
browser.append(UP_DIRECTORY, dirIcon);
}

while (e.hasMoreElements()) {
String fileName = (String)e.nextElement();

if (fileName.charAt(fileName.length() - 1) == SEP) {
// This is directory
browser.append(fileName, dirIcon);
// browser.setSelectCommand(view);

} else {
// this is regular file
browser.append(fileName, fileIcon);
browser.setSelectCommand(SEND_CMD);

}

}


browser.setSelectCommand(view);
//Do not allow creating files/directories beside root
if (!MEGA_ROOT.equals(currDirName)) {
}

browser.setCommandListener(this);
if (currDir != null) {
currDir.close();
}

Display.getDisplay(this).setCurrent(browser);
} catch (IOException ioe) {
ioe.printStackTrace();
}
}

void traverseDirectory(String fileName) {
/* In case of directory just change the current directory
* and show it
*/
if (currDirName.equals(MEGA_ROOT)) {
if (fileName.equals(UP_DIRECTORY)) {
// can not go up from MEGA_ROOT
return;
}

currDirName = fileName;
} else if (fileName.equals(UP_DIRECTORY)) {
// Go up one directory
// TODO use setFileConnection when implemented
int i = currDirName.lastIndexOf(SEP, currDirName.length() - 2);

if (i != -1) {
currDirName = currDirName.substring(0, i + 1);
} else {
currDirName = MEGA_ROOT;
}
} else {
currDirName = currDirName + fileName;
}

showCurrDir();
}

void showFile(final String fileName) {
System.out.println("file name===="+fileName);
DataInputStream dis;


try {
FileConnection fc =
(FileConnection)Connector.open("file://localhost/" + currDirName + fileName);

if (!fc.exists()) {
throw new IOException("File does not exists");
}

InputStream fis = fc.openInputStream();

byte[] b = new byte[5000];
//System.out.println("size of image=> "+b.length);
int length = fis.read(b, 0,5000);
// int length = fis.read();

fis.close();
fc.close();


img = Image.createImage(b,0,length);
ImageItem imageItem = new ImageItem(" ",img,ImageItem.LAYOUT_CENTER,"Duke");
ErrorForm.append(imageItem);

Display.getDisplay(this).setCurrent(viewForm());
} catch (Exception e) {
Alert alert =
new Alert("Error!",
"Can not access file " + fileName + " in directory " + currDirName +
"\nException: " + e.getMessage(), null, AlertType.ERROR);
alert.setTimeout(Alert.FOREVER);
}
}


Thanks



Milan

[fireinwind]

milanexe

do you find a solution of you problem?
please tell me how do you soluted?
qeekey@126.com
thanks.

[jebeng]

hello marwa...

i also try to do file browser...

i used carbide c++ 3rd SDK

can u help me...i urgent..

[petrib]

hello marwa...

i also try to do file browser...

i used carbide c++ 3rd SDK

can u help me...i urgent..

If you are trying to use C++, then you are in the wrong forum (this is about Java). Try also the search feature on this site:
http://discussion.forum.nokia.com/forum/search.php

[javadev2]

I am getting this exception now in N75

can not acces file abc.png in directory c:/data/Images/200709/200709a0
/Exception: Opening a connection failed: 5

In Sonyerricson Iam getting restricted api cant acces...

Whats the problem?

[edesilva]

Hello, I'd like to know if I can access SIP Profile configuration files and edit then using FileConnection and a file that contains the available WLAN's and set one as default, I don't even know if those informations are recorded in files and if Java has permission to access them, but this is a way I thought to configure the SIP profile because doesn' t have an API to access it. Thanks in advance for any help.