Question

I created a static function like this.

public static Bitmap Bitmap(String path) {
    Bitmap bitmap = Bitmap
            .getBitmapResource(Display.getWidth() + "/" + path);
    System.out.println(Display.getWidth() + "" + path);
    return bitmap;
}

However, when I called like this,

private Bitmap download = Config_GlobalFunction.Bitmap("btn_download.png");

The output gave me FRIDG could not find 320/btn_download.png.

In my res folder, I got an folder which was img and inside img got 6 different folders which were 160, 240, 320, 360, 480 and 640 folder.

How can I call correct folder’s image based on Display.getWidth()?

Answer 1

It is possible to have a folder hierarchy under the /res folder but you must use getClass().getResourceAsStream(path) rather than Bitmap.getBitmapResource() in order to create your resource.

This example creates a Bitmap from the path /res/img/hi_res/ui/action_arrow.png:

String imagePath = "/img/hi_res/ui/action_arrow.png"; 
InputStream is = getClass().getResourceAsStream(imagePath);
byte[] imageBytes = IOUtilities.streamToBytes(is);
Bitmap b = Bitmap.createBitmapFromBytes(imageBytes, 0, imageBytes.length, 1);

It’s a bit more work but it does mean you can have a nice folder structure, rather than hundreds of images lumped together in a single folder.