Detect when an image is added or removed in the BlackBerry device file system

import net.rim.device.api.io.file.FileSystemJournal;

import net.rim.device.api.io.file.FileSystemJournalEntry;

import net.rim.device.api.io.file.FileSystemJournalListener;

import net.rim.device.api.ui.component.Dialog;

public class FileExplorerDemoJournalListener implements FileSystemJournalListener  {

private long _lastUSN;

private String path;

public void fileJournalChanged() {

long nextUSN = FileSystemJournal.getNextUSN();

for (long lookUSN = nextUSN - 1; lookUSN >= _lastUSN; --lookUSN) {

FileSystemJournalEntry entry = FileSystemJournal.getEntry(lookUSN);

if (entry == null) {

   break; 

}

path = entry.getPath();

switch (entry.getEvent()) {

   case FileSystemJournalEntry.FILE_ADDED:

        Dialog.alert(path);

       break;

   case FileSystemJournalEntry.FILE_DELETED:

         Dialog.alert(path);

       break;

       }

}

}

}

---------------------- Main-----------------------------------

import net.rim.device.api.ui.UiApplication;

public class Main extends UiApplication {

public static void main(String[] args) {

Main theMain = new Main();

theMain.enterEventDispatcher();

}

public Main() {

this.addFileSystemJournalListener(new FileExplorerDemoJournalListener());

}

}