Image over a background Image in Blackberry - blackberry

Question

I want to set the position of one image over a background image. The position could be anywhere on the screen.
Can I have a sample code or a link or tutorial for that?

Answer 1

Here's how I do it:
This works in 4.6.0 and later because of BackgroundFactory
// Create the background image and the image field to put on top
Background bg = BackgroundFactory.createBitmapBackground(Bitmap.getBitmapResource(bgImgPath);
Bitmap bmp = Bitmap.getBitmapResource(imgPath);
BitmapField imgField = new BitmapField(bmp);
// Create the field manager
VerticalFieldManager manager = new VerticalFieldManager()
{
// Overide the sublayout of the field manager to set the position of
// the image directly
protected void sublayout(int width, int height)
{
setPositionChild(imgField, positionX, positionY)
setExtent(width, height)
}
};
// Set the background of the field manager
manager.setBackground(bg);
// add the bitmap field to the field manager
manager.add(imgField);
// add the field manager to the screen
add(manager);
For multiple images you can make a layout manager class and use that position all your images where you want them using similar techniques. There's a tutorial for making and using a layout manager, I'll try and dig it up and post it back here.
If your using 4.5.0 or earlier, I use a layout manager and just add the background image like any other image but add it first so it draws on the bottom.
Like I said I'll try and find that tutorial for the Layout Manager.

Answer 2

You can create a class that extends Manager class
Here you can specify the background image as well as you can position the other image at a position you want
class Test extends MainScreen
{
Test()
{
super();
Bitmap bmp = Bitmap.getBitmapResource("image1.png");
BitmapField bmpf = new BitmapField(bmp);
Mymanager obj = new Mymanager();
obj.add(bmpf);
}
}
class Mymanager extends Manager
{
final Bitmap background = Bitmap.getBitmapResource("back.png");
protected void paint(Graphics g)
{
g.drawrect(0,0,background.getWidth,background.getheight,background,0,0);
}
protected void sublayout(int width, int height)
{
Field field = getfield(0);
layoutchild(field,100,100);
setPositionchild(field,20,10);
setExtent(Display.getWidth,Display.getHeight);
}
}