Source Code : Capture Item Events

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Capture Item Events

/*--------------------------------------------------
* CaptureItemEvents.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 CaptureItemEvents extends MIDlet implements ItemStateListener, CommandListener
{
  private Display display;      // Reference to Display object for this MIDlet
  private Form fmMain;         // The main Form
  private Command cmExit;      // A Command to exit the MIDlet
  private DateField dfDate;    // Display the date

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

    // Create the date and populate with current date
    dfDate = new DateField("Date is:", DateField.DATE);
    dfDate.setDate(new java.util.Date());

    cmExit = new Command("Exit", Command.EXIT, 1);

    // Create the Form, add Command and DateField
    // listen for events from Command and DateField
    fmMain = new Form("Core J2ME");
    fmMain.addCommand(cmExit);
    fmMain.append(dfDate);
    fmMain.setCommandListener(this);     // Capture Command events (cmExit)
    fmMain.setItemStateListener(this);   // Capture Item events (dfDate)
  }

  // Called by application manager to start the MIDlet.
  public void startApp()
  {
    display.setCurrent(fmMain);
  }

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

  public void commandAction(Command c, Displayable s)
  {
    if (c == cmExit)
    {
      destroyApp(false);
      notifyDestroyed();
    } 
  }
  
  public void itemStateChanged(Item item)              
  {
    System.out.println("Inside itemStateChanged()");
    dfDate.setLabel("New Date: ");
  }
}

           
       

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