SVG graphics auto scaling in J2me

i am developing my first application using SVG graphics , what about auto scaling of SVG background image to match the device screen width and height ? is that poss开发者_如何学JAVAible or shall I have multiple files for the different display resolutions

I'm not sure about J2ME specifically, but this is typically accomplished by setting the viewBox attribute on the root SVG element, and setting the width and height to 100%. See here for an example:

<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg version="1.1"
        viewBox="0 0 1500 1000" preserveAspectRatio="none"
        xmlns="http://www.w3.org/2000/svg"
        width="100%" height="100%">
        <desc>Example ViewBox - uses the viewBox
        attribute to automatically create an initial user coordinate
        system which causes the graphic to scale to fit into the
        viewport no matter what size the viewport is.</desc>
        <!-- This rectangle goes from (0,0) to (1500,1000) in user space.
        Because of the viewBox attribute above,
        the rectangle will end up filling the entire area
        reserved for the SVG content. -->
        <rect x="0" y="0" width="1500" height="1000"
        fill="yellow" stroke="blue" stroke-width="12"  />
        <!-- A large, red triangle -->
        <path fill="red"  d="M 750,100 L 250,900 L 1250,900 z"/>
        <!-- A text string that spans most of the viewport -->
        <text x="100" y="600" font-size="200" font-family="Verdana" >
        Stretch to fit
        </text>
</svg>

Live demo here: http://stuff.echo-flow.com/stackoverflow/viewbox.svg

For information on preserving the aspect ratio of the image, see the specification here: http://www.w3.org/TR/SVG/coords.html#PreserveAspectRatioAttribute