Categories: Java | How To | Code Examples | Files/Data | FileConnection and PIM API (JSR-75)

This page was last modified 23:05, 14 March 2008.

From Forum Nokia Wiki

This article shows, how to read an image from Gallery by using FileConnection API (JSR-75) and show it on Form. The Gallery folders can be accessed by using system properties, for example: System.getProperty("fileconn.dir.photos"). File contents are read by using InputStream, data is saved to a byte array and Image object is created by using Image.createImage() method.

The full source code for a test MIDlet:

ReadMIDlet.java

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import javax.microedition.io.file.*;
import javax.microedition.io.*;
import java.io.*;
 
public class ReadMIDlet extends MIDlet implements CommandListener {
    private Form form;
    private String photos = "fileconn.dir.photos";
    private Image image;
    private Command exitCommand;
    
    public void startApp() {
        form = new Form("ReadMIDlet");
        exitCommand = new Command("Exit", Command.EXIT, 1);
        form.addCommand(exitCommand);
        form.setCommandListener(this);
        Display.getDisplay(this).setCurrent(form);
        String path = System.getProperty(photos);
        form.append(readFile(path + "image.png"));
    }
 
    public void pauseApp() {
    }
 
    public void destroyApp(boolean unconditional) {
    }
    
    public Image readFile(String path) {
        try {
            FileConnection fc = (FileConnection)Connector.open(path, Connector.READ);
            if(!fc.exists()) {
                System.out.println("File doesn't exist!");
            }
            else {
                int size = (int)fc.fileSize();
                InputStream is = fc.openInputStream();
                byte bytes[] = new byte[size];
                int length = is.read(bytes, 0, size);
                image = Image.createImage(bytes, 0, size);            	
            }            
            
        } catch (IOException ioe) {
            System.out.println("IOException: "+ioe.getMessage());            
        } catch (IllegalArgumentException iae) {
            System.out.println("IllegalArgumentException: "+iae.getMessage());            
        }
        return image;
   } 
    
    public void commandAction(Command c, Displayable d) {
        if (c == exitCommand) this.notifyDestroyed();
    }    
}