Midlet running in the background

Hello!
I am wondering if it is possible to create a java program that runs in the background on a mobile phone. I.E can it run without beeing interuppted by a call or the locking of the key pad.
Is it possible to let the program run without interfering with the normal functionallity of the phone?

Hi
To make a midlet run in the background you have to do as mentioned:
Display display = Display.getDisplay(this);
display.setCurrent(null);
This will make the midlet run in background while you can continue working with other midlets. This strategy was tested with J2MEWTK 2.5 & Black Berry.
Thanks
Bruce

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I have downloaded a package of j2me Midlet
from [link] here [link]
and try to reuse the code
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I think the error into one of these two classes
package main;
import javax.microedition.midlet.*;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import javax.microedition.media.Manager;
import javax.microedition.media.MediaException;
import javax.microedition.media.Player;
import java.io.IOException;
import java.io.InputStream;
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package main;
import java.io.IOException;
import javax.microedition.lcdui.*;
import javax.microedition.lcdui.game.*;
public class SSGameCanvas extends GameCanvas implements Runnable {
    protected GameManager gameManager;
    protected boolean running;
    private int tick=0;
    private static int WIDTH;
    private static int HEIGHT;
    private int mDelay = 20;
    Form mainForm;
    Display display;
    //private int MaxTime;
    public SSGameCanvas() throws IOException{
        super(true);
        gameManager = new GameManager(5,5,getHeight()-10,getWidth()-10,this);
    public void start() {
            this.running = true;
            Thread t = new Thread(this);
            t.start();
    public void stop() {
        running = false;
    public void render(Graphics g) {
        WIDTH = getWidth();
        HEIGHT = getHeight();
        // Clear the Canvas.
        g.setColor(0, 0, 50);
        g.fillRect(0,0,WIDTH-1,HEIGHT-1);
        // draw border
        g.setColor(200,0,0);
        g.drawRect(0,0,WIDTH-1,HEIGHT-1);
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            // draw graphics
            render(getGraphics());
            // advance to next graphics
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            try { Thread.sleep(mDelay); }
            catch (InterruptedException ie) {}
    public void advance(int ticks) {
        // advance to next game canvas
        gameManager.advance(ticks);
        this.paint(getGraphics());
}Edited by: VANPERSIE on Jul 10, 2012 12:26 PM

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