Mega Code Archive
ChoiceGroup With Images
<![CDATA[
/*--------------------------------------------------
* ChoiceGroupWithImages.java
*
* Example from the book: Core J2ME Technology
* Copyright John W. Muchow http://www.CoreJ2ME.com
* You may use/modify for any non-commercial purpose
*-------------------------------------------------*/
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class ChoiceGroupWithImages extends MIDlet implements CommandListener
{
private Display display; // Reference to display object
private Form fmMain; // Main form
private Command cmExit; // Command to exit the MIDlet
private Command cmView; // View the choice selected
private ChoiceGroup cgPrefs; // Choice Group of preferences
public ChoiceGroupWithImages()
{
display = Display.getDisplay(this);
try
{
// Create array of image objects
Image images[] = {Image.createImage("/up.png"), Image.createImage("/down.png"),
Image.createImage("/help.png") };
// Create array of corresponding string objects
String options[] = {"Upload", "Download", "Help"};
// Create a choice group using arrays
cgPrefs = new ChoiceGroup("Select Option:", Choice.EXCLUSIVE, options, images);
}
catch (java.io.IOException e)
{
System.err.println("Unable to locate or read .png file");
}
cmExit = new Command("Exit", Command.EXIT, 1);
cmView = new Command("View", Command.SCREEN,2);
// Create Form, add components, listen for events
fmMain = new Form("");
fmMain.append(cgPrefs);
fmMain.addCommand(cmExit);
fmMain.addCommand(cmView);
fmMain.setCommandListener(this);
}
public void startApp()
{
display.setCurrent(fmMain);
}
public void pauseApp()
{ }
public void destroyApp(boolean unconditional)
{ }
public void commandAction(Command c, Displayable s)
{
if (c == cmView)
{
boolean selected[] = new boolean[cgPrefs.size()];
// Fill array indicating whether each element is checked
cgPrefs.getSelectedFlags(selected);
// Print to console the status of each element
for (int i = 0; i < cgPrefs.size(); i++)
System.out.println(cgPrefs.getString(i) + (selected[i] ? ": selected" : ": not selected"));
}
else if (c == cmExit)
{
destroyApp(false);
notifyDestroyed();
}
}
}
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