It uses pixels, but I'm sure you're wondering how to use dips instead. The answer is in TypedValue.applyDimension(). Here's an example of how to convert dips to px in code:
// Converts 14 dip into its equivalent pxResources r = getResources();float px = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 14, r.getDisplayMetrics());
原文地址：http://stackoverflow.com/questions/2406449/does-setwidthint-pixels-use-dip-or-px