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→BlackBerry Development Fundamentals using Eclipse IDE
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=== Procedure to add UI Elements to Application ===
{| class="wikitable" border="0" cellpadding="6"
! Steps !! Actions
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| [[File:12bb.png|left|600px]] || <source lang="java">
/**
* Creates a new HelloWorldScreen object
*/
HelloWorldScreen() {
// Set the displayed title of the screen
setTitle("Eclipse Course");
// Add a read only text field (RichTextField) to the screen. The
// RichTextField is focusable by default. Here we provide a style
// parameter to make the field non-focusable.
add(new RichTextField("Welcome to BlackBerry World!",
Field.NON_FOCUSABLE));
}
</source>
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| [[File:13bb.png|left|600px]] || [http://www.blackberry.com/developers/docs/6.0.0api/net/rim/device/api/ui/component/Dialog.html Dialog]
Provides a dialog box with predefined configurations.
To get a standard, predefined dialog use
* Dialog.alert(java.lang.String)
** This method creates an alert dialog typically used to notify the user of an event or some important information. The dialog uses a exclamation mark bitmap.
* Dialog.ask(int)
** This method creates a standard inquiry dialog. The dialog uses a question mark bitmap.Creates a standard inquiry dialog.
* Dialog.inform(java.lang.String).
** Creates a notification dialog with the specified message. This method creates a notification dialog displaying the specified message. The dialog uses the "information" bitmap.
These pop up a predefined dialog and wait for user input. To get a more customized dialog, instantiate this class or extend it.
Pressing ESCAPE returns Dialog.CANCEL, but only if it was one of the choices specified in the values array.
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| [[File:14bb.png|left|600px]] || <source lang="java">
/**
* Displays a dialog box to the user with the text "Goodbye!" when the
* application is closed.
*
* @see net.rim.device.api.ui.Screen#close()
*/
public void close() {
// Display a farewell message before closing the application
Dialog.alert("Goodbye!");
super.close();
}
</source>
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