Java Development

[shafich]

Hello,
My application has one class myscreen that extends MainScreen. So as user starts using the application I just update myscreen ( so I don't use popscreen or pushscreen nor do I use a new instance of any screen)
So my Menu is the same over all the application.

My question is can I remove/add MenuItems ? I know how add/remove MenuItem if I am using different Screens, however my application has only one screen.
How can I get an instance of the "Menu" so that I can use Menu.add(menuItem) Menu.delete(MenuItemIndex) from my functions (my functions are in synchronized blocks inside a timerTask)

I hope I am clear, so that anyone could help...

Thanks in advance ...

 

[shahumang8]

if possible then send the code.

Thanks.

[shafich]

Solved...
I over ridden makeMenu and added to it some dynamic static variables that I change as my application change (with needs) ... 
-----------working code-----------------------

static boolean d_FromMainpage=true;
protected void makeMenu(Menu menu , int instance) {

//d_FromMainpage changes as my application goes on ... (so as I please I toggle between adding each of the items)
// note that -makeMenu()- is called each while or has a auto-change-listen ... I am really not sure about any of this , //what I am sure about is that this CODE worked for me. Hope I helped.

menu.deleteAll();

if(d_FromMainpage)
menu.add(RestartItem);
else menu.add(StartItem);

menu.add(RateUs);
menu.add(MenuItem.separator(122));
menu.add(Help);
menu.add(MenuItem.separator(155));
menu.add(exitItem);


}

[alishaik786]

This is a sample Code gives how to add and remove the menuItem from the Menu;

According to this you can you can add or remove your menuItems:

The below is sample class: Abc.java

public class Abc extends MainScreen implements FieldChangeListener	
{	
	String menuItemName="Add or Remove";	
	ButtonField addMenu,removeMenu;		
	MenuItem menuItem;
	public Abc()
    {      
		createGUI();             
    }

	
	public void createGUI() 
	{
		addMenu=new ButtonField("Add Menu");
		addMenu.setChangeListener(this);		
		add(addMenu);
		
		removeMenu=new ButtonField("Remove Menu");
		removeMenu.setChangeListener(this);		
		add(removeMenu);
		
		menuItem=new MenuItem(menuItemName,100,101) 
		{
			public void run() 
			{
				Dialog.alert("Add or Remove Menu Item");
			}
		};
		addMenuItem(menuItem);		
	}

	public void fieldChanged(Field field, int context) 
	{
		if(field==addMenu)
		{
			if(AddOrRemoveMenuItems.addTheMenu(menuItem))
			{
				Dialog.alert("Aleady Added to MenuItem");
			}
			else
			{
				addMenuItem(menuItem);
				Dialog.alert("Added to MenuItem Successfully");
			}
		}
		else if(field==removeMenu)
		{
			if(AddOrRemoveMenuItems.removeTheMenu(menuItem))
			{
				removeMenuItem(menuItem);
				Dialog.alert("MenuItem Removed Successfully");
			}
			else
			{
				Dialog.alert("Already Removed from MenuItem");
			}
		}
	}
}

I took both addTheMenu(menuItem) and removeTheMenu(menuItem) methods in separate class. So I can call anywhere in my application;

AddOrRemoveMenuItems.java

public class AddOrRemoveMenuItems 
{
	public static boolean addTheMenu(MenuItem menuItem) 
	{	
		boolean isAdding=false;
		Screen screen=Ui.getUiEngine().getActiveScreen();
		Menu menu=screen.getMenu(0);
		for(int i=0;i<menu.getSize();i++)
		{
			if(menu.getItem(i).toString().equalsIgnoreCase(menuItem.toString()))
			{
				isAdding=true;
			}			
		}
		return isAdding;
	}
	
	public static boolean removeTheMenu(MenuItem menuItem) 
	{	
		boolean isRemoving=false;
		Screen screen=Ui.getUiEngine().getActiveScreen();
		Menu menu=screen.getMenu(0);
		for(int i=0;i<menu.getSize();i++)
		{
			if(menu.getItem(i).toString().equalsIgnoreCase(menuItem.toString()))
			{
				isRemoving=true;	
			}		
		}
		return isRemoving;
	}
}

Check this sample code first and then use this according to your requirement;

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Feel to click LIKE button if the solution helps you;