BlackBerry - waiting screen [closed]

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. 开发者_StackOverflow中文版 Closed 10 years ago.

i am developing one application in blackberry java development. I am requesting to http means i am connecting to web service .response of web service taking some time .That time i want to display some waiting screen.

Could you tell me how can i do that....

Regards Pankaj Pareek

---

Basically you need to start the network request in a background thread. Once the network operation is complete you should notify the main/UI thread to change the waiting screen into the results.

To notify the main thread have a look at the link below and search for invokeLater:
http://developers.sun.com/mobility/midp/articles/blackberrydev/

Word of advice: Don't spawn to many threads at once on mobile devices. Usually they have a really low maximum number of threads.

---

It's already here:
Stackoverflow - Blackberry - Loading screen with animation
Stackoverflow - Blackberry - Application loading screen

---

Do one thing.... At the listner event of button write this.

         UiApplication.getUiApplication().invokeLater(new Runnable(){
            public void run(){
             Status.show("Please Wait....",b,3600);
             message.setText(test(theFile));
            }
         });

---

I created a custom animated bitmap field, like this:

//thread class

public class AnimatedImageField  extends BitmapField implements Runnable
{  

private Thread thread = null;
private boolean animate=true;
private int interval = 0;
private int index=0;
private Bitmap bitmap = null;
private int frameno = 0;
private int fieldHeight=0;
private int fieldWidth=0;
private Bitmap finalbitmap = null;
private int imgHeight = 0;
private int imgWidth= 0;

public AnimatedImageField(int fieldwidth, int fieldheight, Bitmap bitmap, int frameno, int interval, long style)
{
    super(bitmap, style);
    this.interval=interval;
    this.bitmap=bitmap;
    this.frameno=frameno;
    imgHeight = bitmap.getHeight();
    int imgwidth = bitmap.getWidth();
    imgWidth=imgwidth/frameno;
    this.fieldWidth = fieldwidth;
    this.fieldHeight = fieldheight;
}

public AnimatedImageField(Bitmap bitmap, int frameno, int interval, long style)
{
    super(bitmap, style);
    this.interval=interval;
    this.bitmap=bitmap;
    this.frameno=frameno;
    imgHeight = bitmap.getHeight();
    int imgwidth = bitmap.getWidth();
    imgWidth=imgwidth/frameno;
    fieldWidth = imgWidth;
    fieldHeight = imgHeight;
}

protected void paint(Graphics graphics){
    graphics.setColor(Color.WHITE);
    graphics.fillRect(0,0,this.getPreferredWidth(), this.getPreferredHeight());

    //System.out.println("animate:"+animate);
    if ( animate )
        graphics.drawBitmap((fieldWidth-imgWidth)/2, (fieldHeight-imgHeight-50)/2, 
            imgWidth, bitmap.getHeight(), bitmap , imgWidth*index, 0);     
    else
        graphics.drawBitmap((fieldWidth-finalbitmap.getWidth())/2, (fieldHeight-finalbitmap.getHeight()-50)/2, 
            finalbitmap.getWidth(), finalbitmap.getHeight(), finalbitmap , 0, 0);     
}

public int getPreferredWidth()
{
        return fieldWidth;
}

public int getPreferredHeight()
{
        return fieldHeight;
}

protected void layout(int arg0, int arg1)
{
        setExtent(getPreferredWidth(), getPreferredHeight());
}

public void startAnimation(){
     //System.out.println("startAnimation");
    animate=true;
    thread = new Thread(this);
    thread.start();
}

public void updateLayout(int height, int width){
    //System.out.println("updateLayout:height:"+height);
    this.fieldHeight=height;
    this.fieldWidth=width;
    super.updateLayout();
}

public void stopAnimation(Bitmap bitmap){
    //System.out.println("stopAnimation");        
    this.finalbitmap=bitmap;
    animate=false;
}    

public void stopAnimation(){
    //System.out.println("stopAnimation");
    animate=false;
}    

public void run(){
        while(animate){ 
            //System.out.println("run:animate:"+animate);
            try{ Thread.sleep(interval);}catch(Exception e){}
            if ( index+1>=frameno )
                index=0;
            else
                index++;
            invalidate();
        }
}

}

call from : //loading

    Bitmap load_icon = Bitmap.getBitmapResource("loading.png");
    AnimatedImageField spinner = new AnimatedImageField(Display.getWidth(), Display.getHeight(), load_icon,
            12, 100, Field.FIELD_HCENTER | Field.FOCUSABLE
            | Field.FIELD_VCENTER);
    spinner.startAnimation();
    add(spinner);