MultiList icon_URLImage

[Siripé Ibrahim]

IDE: NetBeans 8.0.1
OS : Win 7
Simulator : Nexus Skin
Device : Galaxy S2

Codename One Version : 1.0.78

I used ImageDownloadService to load online image in multilist (it's worked) for perfomance reason I decide to try URLImage , below my code with update according advise of M. Shai Almog (Thank you to him)

 while (c.next()) 
   {
         hlist = new Hashtable();
         r = c.getRow();

         sb.delete(0, sb.length());
         sb.append("alb").append(r.getInteger(4));
         urlcover = r.getString(10); 
         hlist.put("Line1", r.getString(6));
         hlist.put("Line2", r.getString(8));
         hlist.put("icon", defaultimg);
         hlist.put("iconName", sb.toString());
         hlist.put("icon_URLImage", urlcover);
         vlist.add(hlist);
    } 
    mlist.setModel(new Model(vlist));
   mlist.setRenderer(createListRenderer());

 In createListRenderer my code is :
 private static MultiButton createRendererMultiButton() {
    MultiButton b = new MultiButton();
    b.setIconName("icon");
    b.setNameLine1("Line1");
    b.setNameLine2("Line2");
    b.setUIID("Label");
    return b;
}

private static ListCellRenderer createListRenderer() {
    MultiButton sel = createRendererMultiButton();
    MultiButton unsel = createRendererMultiButton();
    return new GenericListCellRenderer(sel, unsel);
}

 I notice a real improvement of perfomance with URLImage, the placeholder is loaded but my online image is still not update in my multilist.

 I don't know what to do to resolve this issue since yesterday.

[Shai Almog]

You need to leave the icon property in the hashtable blank otherwise the URLImage thinks the image was already downloaded.
The placeholder will be used seamlessly.

[Siripé Ibrahim]

Sorry to disturb you again,

I update my code but still not working.

This time there is none image shown on multilist below what I wrote :

 while (c.next())

  {
       ...................
       hlist.put("iconName", sb.toString());

       hlist.put("icon_URLImage", urlcover);
       .............................................

  }

 private static MultiButton createRendererMultiButton(final Image img) {

        MultiButton b = new MultiButton();

        b.setIcon(img);

        b.setIconName("icon");

        b.setNameLine1("Line1");

        b.setNameLine2("Line2");

        b.setUIID("Label");

        return b;

    }

    

    private static ListCellRenderer createListRenderer(final Image img) {

        MultiButton sel = createRendererMultiButton(img);

        MultiButton unsel = createRendererMultiButton(img);

        return new GenericListCellRenderer(sel, unsel);

    }

 

[Shai Almog]

Are you doing this on a List or on a MultiList?
You should not change the renderer on a MultiList, this might have an effect related to this.

[Siripé Ibrahim]

I'm doing this with MultiList in hancoded applications.

Yes I used custom renderer.

I change my code I put  custom renderer in comment, right now it's default renderer but still the same (below code):

                           while (c.next()) 

                            {

                               ...............

                                  hlist.put("iconName", sb.toString());

                                 hlist.put("icon_URLImage", urlcover);
                               .............

                            }

                         // (in comment) mlist.setRenderer(createListRenderer(defaultimg));

                        mlist.setModel(new Model(vlist));

[Shai Almog]

Change it to be list not to remove the renderer since then you would be removing the logic related to the URLImage.

[Siripé Ibrahim]

Hi Shai,

My situation is mystical, I try what you advise me but my situation not change online picture still not loaded

final List list = new List();
while (c.next())
{

    ......
      hlist.put("iconName", sb.toString());
      hlist.put("icon_URLImage", urlcover);
    ......
}

list.setRenderer(createListRenderer());
list.setModel(new Model(vlist, defaultimg));


 //My GenericListCellRenderer
private static MultiButton createRendererMultiButton() {

        MultiButton b = new MultiButton();

        b.setIconName("icon");
        b.setNameLine1("Line1");
        b.setNameLine2("Line2");
        b.setUIID("Label");
        return b;
    }

   
    private static ListCellRenderer createListRenderer() {

        MultiButton sel = createRendererMultiButton();
        MultiButton unsel = createRendererMultiButton();
        return new GenericListCellRenderer(sel, unsel);
    }

  //My Model
  public Object getItemAt(int index) {
        Hashtable<String, Object> h =  (Hashtable<String, Object>)v.elementAt(index);
        h.put("icon", defaultIcon);
        return h;
    }

When I comment  h.put("icon", defaultIcon); there is no Default Image and my online picture still not loaded

[Shai Almog]

Hi,
do you see requests going out to the image URL in the network monitor?

[Siripé Ibrahim]

Hi Shai,

Hope you are doing well .

Thank you for your kind help and excuse me for long time unavailability due to personal problem.

Regarding your question I don't see any URL loaded in monitor.

But I think it will work with GUI Builder. But Personnally I found my application a little bit fast than application make with GUI Builder.

So do you think generally handcoded application is more light and fast than application make with GUI Builder.

Thanks & Best Regards

[Shai Almog]

Hi,
its a hard nuanced question but generally performance shouldn't be an issue either way. You should be able to handcode everything the GUI builder does.

[Siripé Ibrahim]

Thank you very much, have a good day!