SP Differences for DP

Project	Density	Scal	Use
DP (DIP)	Independent	You can use when setting properties that represent length, height, and so on
Sp	Independent	Independent	Set font
Px	Related
Project	Density	Scal	Use
WVGA	240
HVGA	160
QVGA	120
If the screen density is 160, then the DP and SP and PX are the same. 1DP=1SP=1PX,
Formula:
px = (density/160) DP
Density means "density". Density, meaning the size of the capacity within the unit area.
The density is large, the PX on the unit area will be more. Represents the actual pixel of the screen. For example, the 320*480 screen has 320 pixels in the landscape and 480 pixels in the portrait.

SP Differences for DP