[VegetableBird]

I use PhoneListener to change the counter value of MainScreen like this:

public class _MainScreen extends MainScreen {
	public static int counter = 0;

	public _MainScreen() {
		super(DEFAULT_MENU | DEFAULT_CLOSE);
		setTitle("Call Reminder");
		MenuItem item = new MyMenuItem();
		addMenuItem(item);
	}
}

class MyMenuItem extends MenuItem {
	MyMenuItem() {
		super("add", 0, 100);
	}

	public void run() {
		_UiApplication.mainScreen.add(new LabelField(_MainScreen.counter + ""));
	}
}

public class _PhoneListener extends AbstractPhoneListener {
	public _PhoneListener() {
		Phone.addPhoneListener(this);
	}

	public void callInitiated(int callid) {
		_MainScreen.counter++;
		System.out.println(_MainScreen.counter);
	}
}

I make a call,the console print "1". But I press "add" menuItem the screen append "0".What's the problem?

[pwaugh]

The reason I believe is because the menu item instantiates a "new" LabelField, and doesn't use the existing one.

[VegetableBird]

It even don't work as follow:

class MyMenuItem extends MenuItem {
	MyMenuItem() {
		super("add", 0, 100);
	}

	public void run() {
		System.out.println(_MainScreen.counter);
	}
}

In phone listener, the console output "1". In main screen output "0".

[pwaugh]

I don't see where you are adding counter to the mainscreen display, so it is just displaying "0" which is the default for an initialized int.

In other words, you need to add a LabelField to the mainscreen display in the screen constructor, then update it's .text value.

[VegetableBird]

I'm sorry the problem still exist.
All i want is to catch the phone call in the phoneListener and transfer the information to the main screen.So far i haven't did it.I used to programming with j2me and not famlier with blackberry.Did i miss something?

[VegetableBird]

I finally solve the problem by coding this:

public void callInitiated(int callid) {
		_UiApplication.mainScreen.add(new LabelField(info));
		UiApplication.getUiApplication().pushScreen(_UiApplication.mainScreen);
	}

The blackberry use stack to display screen and it won't update automatic as j2me.