View source

{{KBKI}}
__NOTOC__
__NOEDITSECTION__
This known issue was originally created by '''Schoenke''' and has been verified by Forum Nokia. 

{|style="background:#eceff2" width="660px" border="1" cellpadding="5" cellspacing="0" 
|-
|'''ID''' || KIJ001079
|'''Creation date''' ||June 12, 2009
|-
|'''Platform''' ||S60 3rd Edition, FP2
|'''Tested on devices''' ||S60 3rd Edition, FP2 Emulator, Nokia 6210 Navigator
|-
|'''Category''' ||Java
|'''Subcategory''' ||LCDUI
|}


==Description==

If you add more than 22 CustomItems on a Form, the MIDlet will hang up when calling <tt>Display.setCurrent()</tt> or <tt>Display.setCurrentItem()</tt>. This means that the Form will not be displayed.

In the debugger you can see that one thread hangs in <tt>Form._setCurrentItem()</tt> and another one in <tt>CustomItemTest.handleSizeChanged()</tt>. 

==How to reproduce==

See the following code snippet. This code works fine in Series 40 and S60 3rd Edition, FP1 emulators; however, start-up in the latter ones is very slow. 

For a cross check, comment out approximately 10 <tt>append()</tt> statements and rerun the MIDlet. This way it works.

<code java>
 package main;
 
 import javax.microedition.lcdui.Display;
 import javax.microedition.midlet.MIDlet;
 
 public class MidletTest extends MIDlet
 {
 
    public void startApp() {
      FormTest frmTest = new FormTest(Display.getDisplay(this));
      frmTest.open(1);
    }
    
    public void destroyApp(boolean b) {
    }
    
    /**
     * Pausing is not supported in NOKIA's Series 40 and 
     * S60 MIDP implementations.
     */
    public void pauseApp() {
    }
    	
    public void quit() {
      notifyDestroyed();
    }
 }
</code>

The Form:
<code java>
 package main;
 
 import javax.microedition.lcdui.Display;
 import javax.microedition.lcdui.Form;
 
 import main.CustomItemTest;
 
 public class FormTest extends Form {
 
   private final Display display;
 	
   private final CustomItemTest item00;
   private final CustomItemTest item01;
   private final CustomItemTest item02;
   private final CustomItemTest item03;
   private final CustomItemTest item04;
   private final CustomItemTest item05;
   private final CustomItemTest item06;
   private final CustomItemTest item07;
   private final CustomItemTest item08;
   private final CustomItemTest item09;
   private final CustomItemTest item10;
   private final CustomItemTest item11;
   private final CustomItemTest item12;
   private final CustomItemTest item13;
   private final CustomItemTest item14;
   private final CustomItemTest item15;
   private final CustomItemTest item16;
   private final CustomItemTest item17;
   private final CustomItemTest item18;
   private final CustomItemTest item19;
   private final CustomItemTest item20;
   private final CustomItemTest item21;
   private final CustomItemTest item22;
   private final CustomItemTest item23;
   private final CustomItemTest item24;
   private final CustomItemTest item25;
   private final CustomItemTest item26;
   private final CustomItemTest item27;
   private final CustomItemTest item28;
   private final CustomItemTest item29;
   
   public FormTest(Display pDisplay) {
     super("test screen");
     
     this.display = pDisplay;
     
     this.item00 = new CustomItemTest();
     this.item01 = new CustomItemTest();
     this.item02 = new CustomItemTest();
     this.item03 = new CustomItemTest();
     this.item04 = new CustomItemTest();
     this.item05 = new CustomItemTest();
     this.item06 = new CustomItemTest();
     this.item07 = new CustomItemTest();
     this.item08 = new CustomItemTest();
     this.item09 = new CustomItemTest();
     this.item10 = new CustomItemTest();
     this.item11 = new CustomItemTest();
     this.item12 = new CustomItemTest();
     this.item13 = new CustomItemTest();
     this.item14 = new CustomItemTest();
     this.item15 = new CustomItemTest();
     this.item16 = new CustomItemTest();
     this.item17 = new CustomItemTest();
     this.item18 = new CustomItemTest();
     this.item19 = new CustomItemTest();
     this.item20 = new CustomItemTest();
     this.item21 = new CustomItemTest();
     this.item22 = new CustomItemTest();
     this.item23 = new CustomItemTest();
     this.item24 = new CustomItemTest();
     this.item25 = new CustomItemTest();
     this.item26 = new CustomItemTest();
     this.item27 = new CustomItemTest();
     this.item28 = new CustomItemTest();
     this.item29 = new CustomItemTest();
      
     append(this.item00);
     append(this.item01);
     append(this.item02);
     append(this.item03);
     append(this.item04);
     append(this.item05);
     append(this.item06);
     append(this.item07);
     append(this.item08);
     append(this.item09);
     append(this.item10);
     append(this.item11);
     append(this.item12);
     append(this.item13);
     append(this.item14);
     append(this.item15);
     append(this.item16);
     append(this.item17);
     append(this.item18);
     append(this.item19);
      
     append(this.item20);
     append(this.item21);
     append(this.item22);
     append(this.item23);
     append(this.item24);
     append(this.item25);
     append(this.item26);
     append(this.item27);
     append(this.item28);
     append(this.item29); 
     }
   
   public void open(int pFocus) {
     display.setCurrentItem(get(pFocus));
   }
 }
</code>

The CustomItem:

<code java>

 package main;
 
 import javax.microedition.lcdui.CustomItem;
 import javax.microedition.lcdui.Graphics;
 
 public class CustomItemTest extends CustomItem {
   
   public CustomItemTest() {
     super("");
   }
   
   protected void paint(Graphics pGraphics, int pWidth, int pHeight) {  
     pGraphics.setColor(0x00ffffaa);
     pGraphics.fillRect(1, 1, pWidth - 2, pHeight - 2);
     pGraphics.setColor(0x00000000);
     pGraphics.drawString("TEST", 0, 0, Graphics.TOP | Graphics.LEFT);
   }
 
   protected int getMinContentHeight() {
     return 20;
   }
 
   protected int getMinContentWidth() {
     return 40;
   }
 
   protected int getPrefContentHeight(int arg0) {
     return 20;
   }
 
   protected int getPrefContentWidth(int arg0) {
     return 40;
   }
 }
</code>

==Solution==

This issue is expected to be fixed in future software versions starting from S60 5th Edition.

[[Category:Known Issue]]
[[Category:Java ME]]
[[Category:UI]]
[[Category:Code Examples]]
[[Category:S60 3rd Edition, Feature Pack 2]][[Category:Published]]