Images in the 'drawable' folder are resized automatically?

Question

I have a 1280x720px image in the res/drawable folder (not the drawable-hdpi, drawable-ldpi, etc. folder). But at runtime the size is 2560x1440px. How is this possible? Does android resize the images in the drawable folder?

Here is the code:

    Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.start_image_left);
    int h = bitmap.getHeight(), w = bitmap.getWidth();

I'm testing this on a Motorola Moto G gen2.

Answer 1

There's really no reason you should ever put a bitmap into the root drawable directory. It should typically be used for XML drawables only. Bitmaps in the drawable directory will essentially be handled as if they were in drawable-mdpi (scaled up proportionally for other densities).

If your goal is to have a bitmap image that is the same pixel size on all densities, you need to put it in drawable-nodpi. This will cause it to not be scaled.