Resize image and Field manager Design manual

package mypackage;

import net.rim.device.api.math.Fixed32;
import net.rim.device.api.system.Bitmap;
import net.rim.device.api.system.EncodedImage;
import net.rim.device.api.ui.container.HorizontalFieldManager;
import net.rim.device.api.ui.container.VerticalFieldManager;

public class Layout_Design {
   
    /// Dynamically change image//////////////
   
    public Bitmap getScaledBitmapImage(EncodedImage image, int width, int height)
    {
        // Handle null image
        if (image == null)
        {
            return null;
        }
     
        //return bestFit(image.getBitmap(), width, height);
     
        int currentWidthFixed32 = Fixed32.toFP(image.getWidth());
        int currentHeightFixed32 = Fixed32.toFP(image.getHeight());
     
        int requiredWidthFixed32 = Fixed32.toFP(width);
        int requiredHeightFixed32 = Fixed32.toFP(height);
     
        int scaleXFixed32 = Fixed32.div(currentWidthFixed32, requiredWidthFixed32);
        int scaleYFixed32 = Fixed32.div(currentHeightFixed32, requiredHeightFixed32);
     
        image = image.scaleImage32(scaleXFixed32, scaleYFixed32);
     
        return image.getBitmap();
    }
   
    /////VerticalFieldManager dynamically////////////////////////
   
    public VerticalFieldManager getCustomVerticalManager( final int width, final int height)
    {
        VerticalFieldManager verticalManager = new VerticalFieldManager(net.rim.device.api.ui.Manager.VERTICAL_SCROLL | net.rim.device.api.ui.Manager.VERTICAL_SCROLLBAR)
        {
          
            protected void sublayout( int maxWidth, int maxHeight )
            {
                int displayWidth = width;
                int displayHeight = height;
                super.sublayout( displayWidth, displayHeight);
                setExtent( displayWidth, displayHeight);
            }
        };
       
        return verticalManager;
    }
    public VerticalFieldManager getCustomVerticalManager2( final int width, final int height)
    {
        VerticalFieldManager verticalManager = new VerticalFieldManager(net.rim.device.api.ui.Manager.NO_VERTICAL_SCROLL | net.rim.device.api.ui.Manager.NO_VERTICAL_SCROLLBAR)
        {
          
            protected void sublayout( int maxWidth, int maxHeight )
            {
                int displayWidth = width;
                int displayHeight = height;
                super.sublayout( displayWidth, displayHeight);
                setExtent( displayWidth, displayHeight);
            }
        };
       
        return verticalManager;
    }

    public HorizontalFieldManager getCustomHorizontalManager( final int width, final int height)
    {
        HorizontalFieldManager HorizontalManager = new HorizontalFieldManager(net.rim.device.api.ui.Manager.VERTICAL_SCROLL | net.rim.device.api.ui.Manager.VERTICAL_SCROLLBAR)
        {
          
            protected void sublayout( int maxWidth, int maxHeight )
            {
                int displayWidth = width;
                int displayHeight = height;
                super.sublayout( displayWidth, displayHeight);
                setExtent( displayWidth, displayHeight);
            }
        };
       
        return HorizontalManager;
    }   
 
}




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1. How to use Bitmap Method?
       
Layout_Design method=new Layout_Design();

                 EncodedImage ei=EncodedImage.getEncodedImageResource("background.png");
                 VericalFieldManager backgroundlay=method.getCustomVerticalManager(deviceWidth, (deviceHeight*80)/100);
 backgroundlay.setBackground(BackgroundFactory.createBitmapBackground(method.getScaledBitmapImage(ei,Display.getWidth(),Display.getHeight())));