Java Development

[n2v2rda2]

public class getimage extends UiApplication {
    public static void main(String[] args) {
        getimage theApp    =    new getimage();       
        theApp.enterEventDispatcher();  
    }//main
    
    getimage()
    {
        try {
            pushScreen(new NewScreen() );
                         
        } catch (IOException e) {
            e.printStackTrace();
        }   }    }

final class NewScreen extends MainScreen 
{    
    Field imageField;
 
     class RemindTask extends TimerTask {
         public void run() {
               imageField = new WebBitmapField(url);
                     
         }//run
     }//Task
 
    
     public NewScreen() throws IOException 
    {
        super();  
        try
        {    
            add(imageField);
      
            Timer timer = new Timer();
            timer.schedule (new RemindTask(),0, 1000);
          
        }  catch(Exception e){}

       } }}

i just checked image on simulator it was perfect 

and now.i want to re-download and re-paint image  every 2 seconds

because server is webcam that sending jpg

but this source is not working

i only saw the white screen

what wrong with this source ?       

    

[mgontar]

Hi!

This WebBitmapField, is it from Coderholic - Blackberry WebBitmapField?

try this code: 

    class RemindTask extends TimerTask {
        public void run() {
        	  WebBitmapField newImageField = new WebBitmapField(url);
              replace(imageField, newImageField);
              imageField = newImageField;
        }//run
    }//Task

My opinion is you cannot afford 2 seconds even with fast wifi.  

What you can try to do is download not the full image but some kind of offset, difference between current image and previous.

[n2v2rda2]

yes ,it is Coderholic - Blackberry WebBitmapField

unfortunately, it doesn't work

i can see only white screen;;  T T

[peter_strange]

So have you checked that the code is downloading an image on the real device.

Please review this Thread, especially the Simulator section and Required Reading, to understand that as far a network test is concerned, code working on the SImulator will probably not work on the device.

http://supportforums.blackberry.com/t5/Java-Development/Connecting-your-BlackBerry-http-and-socket-c...

Also for this application, I think the only way you are going to get an image to your device in 2 seconds is via WiFi, so that is the connection method I would use (exclusively).  And in this case, I would not use a TimerTask.  Sorry for giving you incorrect advice on the other Thread, but I would start a download Thread, that continually downloads the image, then stalls for 2 seconds between downloads.