Android : Drawing a Square - Android

I'm trying to draw a simple square using canvas in android. The canvas is spread through the whole screen.

My code is -

canvas.drawRect(200, 200, 700, 700, paint);

(It's hard coded for testings)

but the result does not look like a square at all (the height seems to be larger than the width).

Is my logic wrong?

Here's a screenshot of the result.

Thanks!