public String getLabel() {
return _label;
}
public int getShape() {
return _shape;
}
public void setLabel(String label) {
_label = label;
_labelWidth = _font.getAdvance(_label);
updateLayout();
}
public void setShape(int shape) {
_shape = shape;
}
Create a menu item
1.
Import the following classes:
•
net.rim.blackberry.api.menuitem.ApplicationMenuItem
•
java.lang.IllegalStateException
•
net.rim.device.api.ui.component.Dialog
2.
Import the
javax.microedition.pim.Contact
interface.
3.
Extend the abstract
ApplicationMenuItem
class to define a menu item.
public class SampleMenuItem extends ApplicationMenuItem { ... }
4.
Invoke
ApplicationMenuItem()
to specify the position of the menu item in the menu. A higher number means
that the menu item appears lower in the menu.
SampleMenuItem() {
super(20);
}
5.
Implement
toString()
to specify the menu item text. In the following code sample, we implement
toString()
to
display the text "Open the Contacts Demo application" in the menu of the BlackBerry® device application.
public String toString() {
return "Open the Contacts Demo application";
}
6.
Implement
run()
to specify the behaviour of the menu item. In the following code sample, if a BlackBerry device user
clicks the text "Open the Contacts Demo application" in the menu of the BlackBerry device application, if a
Contact
exists, we allow an application called
ContactsDemo
to receive events by invoking
ContactsDemo.enterEventDispatcher()
.
public Object run(Object context) {
Contact c = (Contact)context; // An error occurs if this does not work.
if ( c != null ) {
Development Guide
UI components
27
