Go语言视频零基础入门到精通

okwoie

如题，小弟在看别人的xml代码时候总有dp这个单位，还听人说过dip这个单位，小弟2个都试了。
发现android:textSize="20dip"  与 android:textSize="20dp"效果一样。
请大虾们讲解一下这两个单位是什么意思？

yy1020

如下：

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.