i'm a mobile developer engineer ,and work base on j2me+eclipse/NetBeans IDE platform.
i'm from china,and nice to meet you,my friend,
my skype is ishailin
my MSN is ailin8@163.com
i'd like to have friends with you ,and we can learn together

java can not supply this function,but if you are base on c++ as mtk or symbian you can do this
three years ago i have the idea as you ...

it's easy to do with this tools i made
my skype is  ishailin and msn is ailin8@163.com
i can send the tools to you

public class gCanvas extends Canvas{
   Image img;
   Zoom zoom = new Zoom();
   gCanvas()
   {
      try {
         img = Image.createImage("/menu160.png");
         zoom.setImage(img, W, H);
      } catch (IOException e) {
         e.printStackTrace();
      }
   }
   
   int W=50,H=70;
   protected void paint(Graphics g) {
      zoom.draw(g,this.getWidth()>>1, this.getHeight()>>1, 3);
      g.drawImage(img, this.getWidth()>>1, this.getHeight()>>1, 3);
   }
   protected void keyPressed(int key)
   {
      zoom.setSize(W+=5,H+=5);
      repaint();
   }
}

//-------------------------------------------------------------------------------------------------------------



public class Zoom {

            private AbstractImage globe;
            private AbstractImage lastRenderedImage;
            private ImageTransformationResize resizer;
            private int oldW;
            private int oldH;


            public void setImage(Image img, int w, int h) {
/*  19*/        try {
/*  19*/            Dispose();
/*  20*/            globe = new SmartImage(img);
/*  21*/            resizer = new ImageTransformationResize();
/*  22*/            setSize(w, h);
                }
/*  24*/        catch (Exception ex) {
/*  26*/            ex.printStackTrace();
                }
            }

            public void Dispose() {
/*  32*/        globe = null;
/*  33*/        lastRenderedImage = null;
/*  34*/        resizer = null;
            }

            public void setSize(int w, int h) {
/*  39*/        if (w <= 0 || h <= 0) {
/*  41*/            return;
                }
/*  43*/        if (w == oldW && h == oldH) {
/*  45*/            return;
                } else {
/*  49*/            oldW = w;
/*  50*/            oldH = h;
/*  52*/            lastRenderedImage = null;
/*  53*/            lastRenderedImage = new SmartImage(w, h);
/*  54*/            resizer.setTargetDimensions(w, h);
/*  55*/            resizer.process(globe, lastRenderedImage);
/*  56*/            return;
                }
            }

            public void draw(Graphics g, int x, int y, int anchor) {
/*  60*/        lastRenderedImage.drawOnGraphics(g, x, y, anchor);
            }
}