Can someone explained to me the "paused" state ?

[Shubhrajit Chatterjee]

I don't have a MIDP enabled device and currently playing around with the J2ME toolkit from sun.
I don't understand how the paused state should be working. In my MIDlet, I implemented a pauseApp()
method and inside it I called notifyPaused() . This happens when the user presses some button on the application.
Now when I am trying to restart the application by calling startApp() method again, it is getting destroyed. ( destroyApp() is getting called )
I think I am making a mistake but it seems that I am not being able to find it out. It wud be nice if someone can point it out to me.

[Shubhrajit Chatterjee]

Did I ask a silly question ??? Or does no one no the answer ???

[Valentin Crettaz]

Here is a part of an interesting article in case you haven't read it yet:
Lifecycle Methods

[Eric Giguere]

Don't call notifyPaused from within pauseApp. pauseApp is called by the system to inform your application that it's being paused. You call notifyPaused outside of pauseApp to tell the system that you're putting the application in a paused state. (Note that pauseApp will not be called in this case -- pauseApp is only called when the system is the one initiating the pause.)
When your application is ready to resume, it calls resumeRequest from a background thread. The system will then (at some undertermined point in the future) unpause the application and call startApp, at which point your app is again active.
See pp.44-47 of "Mobile Information Device Profile for Java 2 Micro Edition".

[Shubhrajit Chatterjee]

The following code is not working as it should

import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
public class myproject1 extends MIDlet implements CommandListener{
    
    private Display display;
    private Form props;
    private StringBuffer propbuf;
    private int i;
    
    private Command exitCommand = new Command("Exit", Command.EXIT, 1);
    private Command pauseCommand = new Command("Pause",Command.SCREEN,1);
    
    public myproject1(){
        display = Display.getDisplay(this);
        i = 0;
    }
    
    public void startApp(){
        ++i;
        props = new Form("Shubhrajit's Form");
        props.append("Hello World\n");
        props.append("Shubhrajit's has gone micro\n");
        props.append(Integer.toString(i));
        props.addCommand(exitCommand);
        props.addCommand(pauseCommand);
        props.setCommandListener(this);
        display.setCurrent(props);
    }
    
    protected void destroyApp(boolean unconditional) {
        System.out.println("Application destroyed");
    }
    
    
    public void commandAction(Command c, Displayable s) {
        if (c == exitCommand) {
            destroyApp(false);
            notifyDestroyed();
        } else if(c == pauseCommand){
            notifyPaused();
        }
    }
    
    public void pauseApp() {
        resumeRequest();
    }    
}

[ February 27, 2002: Message edited by: Shubhrajit Chatterjee ]

[Shubhrajit Chatterjee]

When I click the pause button , the home screen comes up in the emulator with the name of the application. Next, when I try to start it again it says "Application Destroyed" i.e. the message I had coded within destroyApp() method...

[Eric Giguere]

It's up to the device/emulator to decide whether a "pause" button pauses or destroys the application. That's not something covered by the spec. In this case you're seeing it destroy the app.