Android中的px, dp, dip and sp总结

最新推荐文章于 2022-11-15 17:47:31 发布

wenjieqi

最新推荐文章于 2022-11-15 17:47:31 发布

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本文详细解释了屏幕像素(px)、英寸(in)、毫米(mm)、点(pt)、密度独立像素(dp)和缩放独立像素(sp)的概念，以及它们在不同屏幕密度和用户字体大小偏好下的应用。

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px is one pixel. scale-independent pixels ( sp ) and density-independent pixels ( dip ).

You would use sp for font sizes and dip for everything else.

dip==dp

from here

px
Pixels - corresponds to actual pixels on the screen.

in
Inches - based on the physical size of the screen.

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
Density-independent Pixels - an abstract unit that is based on the physical density of the screen. These units are relative to a 160 dpi screen, so one dp is one pixel on a 160 dpi screen. The ratio of dp-to-pixel will change with the screen density, but not necessarily in direct proportion. Note: The compiler accepts both "dip" and "dp", though "dp" is more consistent with "sp".

sp
Scale-independent Pixels - this is like the dp unit, but it is also scaled by the user's font size preference. It is recommend you use this unit when specifying font sizes, so they will be adjusted for both the screen density and user's preference.