Android multiple screen sizes with same density

Question

I\'m confused regarding the densities. I see that with medium density, the screen resolution could be either 320x480, 480x800, or 480x854. So if I have an image thats 300px

Answer 1

Actually the code to calculate physical screen size for devices is the following one:

DisplayMetrics dm = new DisplayMetrics();

getWindowManager().getDefaultDisplay().getMetrics(dm);

double x = Math.pow(dm.widthPixels/dm.xdpi,2);

double y = Math.pow(dm.heightPixels/dm.ydpi,2);

double screenInches = Math.sqrt(x+y);