From the Android Developer Documentation: px> Pixels – corresponds to actual pixels on the screen. in> Inches – based on the physical size of the screen.> 1 Inch = 2.54 centimeters mm> Millimeters – based on the physical size of the screen. pt> Points – 1/72 of an inch based on the physical size of the screen. dp or dip> Density-independent Pixels – an abstract unit that … Read more
TL;DR: use px. The Facts First, it’s extremely important to know that per spec, the CSS px unit does not equal one physical display pixel. This has always been true – even in the 1996 CSS 1 spec.CSS defines the reference pixel, which measures the size of a pixel on a 96 dpi display. On a display that has a dpi substantially different than 96dpi (like … Read more
I heard you should define sizes and distances in your stylesheet with em instead of in pixels. So the question is why should I use em instead of px when defining styles in css? Is there a good example that illustrates this?
4 If you really care to distinguish between powers of two and powers of ten, you should read this: https://en.wikipedia.org/wiki/Binary_prefix. Using powers of two interchangeably with metric powers of ten was a given in the early days of computers (and is still used by many systems), but as time goes on and we begin to … Read more
Traditionally by megabyte we mean your second option — 1 megabyte = 220 bytes. But it is not correct actually because mega means 1 000 000. There is a new standard name for 220 bytes, it is mebibyte (http://en.wikipedia.org/wiki/Mebibyte) and it gathers popularity.