Guest Book
What people have said about the book:
This book not only serves as a great reference for competent developers, but also acts as a great training guide for developers getting started with the Blackberry platform. Has saved me a fortune in staff training costs!! All different areas and approaches of the Blackberry infrastructure are covered and no stones are left unturned.
David Pickering |
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Chapter 11 includes a sample BlackBerry Java application that illustrates how to use the different types of layout manager objects available to BlackBerry Java developers. Here's the code:
package com.bbdevfundamentals.ScreenLayout;
import net.rim.device.api.ui.UiApplication;
import net.rim.device.api.ui.component.ButtonField;
import net.rim.device.api.ui.component.EditField;
import net.rim.device.api.ui.component.LabelField;
import net.rim.device.api.ui.component.RichTextField;
import net.rim.device.api.ui.component.SeparatorField;
import net.rim.device.api.ui.container.FlowFieldManager;
import net.rim.device.api.ui.container.HorizontalFieldManager;
import net.rim.device.api.ui.container.MainScreen;
//Create the HelloWorld class
public class ScreenLayout extends UiApplication {
public static void main(String[] args) {
// Instantiate the HelloWorld object
ScreenLayout sl = new ScreenLayout();
// Enter the Event Dispatcher
sl.enterEventDispatcher();
}
public ScreenLayout() {
pushScreen(new ScreenLayoutScreen());
}
}
final class ScreenLayoutScreen extends MainScreen {
public ScreenLayoutScreen() {
super();
// By default the BlackBerry screen uses a
// Vertical Flow Manager
LabelField lblTitle = new LabelField("Screen Layout Sample",
LabelField.ELLIPSIS | LabelField.USE_ALL_WIDTH);
setTitle(lblTitle);
add(new LabelField("Field 1"));
add(new LabelField("Field 2"));
add(new LabelField("Field 3"));
// Now lets switch to a Horizontal flow manager
HorizontalFieldManager hfm = new HorizontalFieldManager();
this.add(hfm);
hfm.add(new LabelField("Label Field 4"));
hfm.add(new LabelField("Label Field 5"));
hfm.add(new EditField("Edit Field", "1"));
hfm.add(new EditField("Edit Field", "2"));
// Now a flow field manager
FlowFieldManager flowManager = new FlowFieldManager();
this.add(flowManager);
ButtonField button1 = new ButtonField("Button 1");
ButtonField button2 = new ButtonField("Button 2");
ButtonField button3 = new ButtonField("Button 3");
ButtonField button4 = new ButtonField("Button 4");
flowManager.add(button1);
flowManager.add(button2);
flowManager.add(button3);
flowManager.add(button4);
// Back to using the default vertical flow manager
this.add(new SeparatorField());
this.add(new RichTextField("Let's add some more edit fields:"));
add(new EditField("Edit Field", "3"));
add(new EditField("Edit Field", "4"));
}
} |
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Inside the Book 
