Blackberry JAVA DEVELOPMENT ENVIRONMENT - - CRYPTOGRAPHIC SMART CARD DRIVER - DEVELOPMENT GUIDE Průvodce řešením problémů stáhnout pdf (Strana 36)

BlackBerry Java Development Environment Development Guide

Adding menu items to BlackBerry applications

The Application Menu Item API, in the net.rim.blackberry.api.menuitem package, lets you add menu items

to BlackBerry® applications. The

ApplicationMenuItemRepository class lets you add or remove menu items

from BlackBerry applications.

Create a menu item

Task Steps

Define a menu item. > Extend the abstract ApplicationMenuItem class.

public class SampleMenuItem extends ApplicationMenuItem { ... }

Specify the position of the menu

item in the menu.

A higher number means that the menu item appears lower in the menu.

>Invoke ApplicationMenuItem().

SampleMenuItem() {

super(20);

}

Specify the menu item text. > Implement toString().

public String toString() {

return "Open the Contacts Demo application";

}

Specify the behavior of the menu

item.

> Implement run().

public Object run(Object context) {

Contact c = (Contact)context; // An error occurs if this does not work.

if ( c ! null ) {

new ContactsDemo().enterEventDispatcher();

} else {

throw new IllegalStateException( "Context is null, expected a Contact

instance");

}

Dialog.alert("Viewing a message in the messaging view");

return null;

}

Task Steps

Retrieve the application menu item

repository.

>Invoke ApplicationMenuItemRepository.getInstance().

ApplicationMenuItemRepository repository =

ApplicationMenuItemRepository.getInstance();

Create your application menu item. > Invoke the constructor.

TestApplicationMenuItem tami = new TestApplicationMenuItem();

Add the menu item to the repository. >Invoke addMenuItem().

repository.addMenuItem(ApplicationMenuItemRepository.MENUITEM_ADDRESSC

ARD_VIEW, tami);

1 2 ... 31 32 33 34 35 36 37 38 39 40 41 ... 285 286

Komentáře k této Příručce

Žádné komentáře

Blackberry JAVA DEVELOPMENT ENVIRONMENT - - CRYPTOGRAPHIC SMART CARD DRIVER - DEVELOPMENT GUIDE Průvodce řešením problémů Strana 36

Komentáře k této Příručce

Související produkty a manuály pro Software Blackberry JAVA DEVELOPMENT ENVIRONMENT - - CRYPTOGRAPHIC SMART CARD DRIVER - DEVELOPMENT GUIDE