multiple Choice List


/*--------------------------------------------------
* MultipleChoiceList.java
*
* Create multiple choice list and save selection
* status of each element in an array.
*
* 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 MultipleChoiceList extends MIDlet implements CommandListener
{
  private Display display;      // Reference to display object 
  private Command cmExit;      // A Command to exit the MIDlet
  private Command cmView;      // View the choice selected
  private List lsPrefs;        // Choice Group of preferences

  public MultipleChoiceList()
  {
    display = Display.getDisplay(this);

    // Create a multiple choice list
    lsPrefs = new List("Preferences", List.MULTIPLE);
    
    // Append options, with no associated images
    lsPrefs.append("Auto Indent", null);
    lsPrefs.append("Replace Tabs", null);
    lsPrefs.append("Wrap Text", null);    

    cmExit = new Command("Exit", Command.EXIT, 1);
    cmView = new Command("View", Command.SCREEN,2);

    // Add commands, listen for events
    lsPrefs.addCommand(cmExit);
    lsPrefs.addCommand(cmView);
    lsPrefs.setCommandListener(this);   
  }

  public void startApp()
  {
    display.setCurrent(lsPrefs);
  }

  public void pauseApp()
  { }
  
  public void destroyApp(boolean unconditional)
  { }

  public void commandAction(Command c, Displayable s)
  {
    if (c == cmView)
    {
      boolean selected[] = new boolean[lsPrefs.size()];
     
      // Fill array indicating whether each element is checked 
      lsPrefs.getSelectedFlags(selected);
      
      for (int i = 0; i < lsPrefs.size(); i++)
        System.out.println(lsPrefs.getString(i) + (selected[i] ? ": selected" : ": not selected"));

    }
    else if (c == cmExit)
    {
      destroyApp(false);
      notifyDestroyed();
    } 
  }
}

Related examples in the same category

1.	List Demo
2.	List Implicit
3.	List CheckBox
4.	List RadioButton
5.	GUI Test in MIDlet
6.	Travel List
7.	Payment MIDlet
8.	Implicit List
9.	List Item MIDlet

multiple Choice List : List « J2ME « Java

Related examples in the same category