原文
The density-independent pixel is equivalent to one physical pixel on a 160 dpi screen, which is the baseline density assumed
by the system for a "medium" density screen. At runtime, the system transparently handles any scaling of the dp units, as necessary, based on the actual density of the screen in use. The conversion of dp units to screen pixels is simple: px
= dp * (dpi / 160). For example, on a 240 dpi screen, 1 dp equals 1.5 physical pixels. You should always use
dp units when defining your application's UI, to ensure proper display of your UI on screens with different densities.
從上文可以看出 px=dp*(dpi/160);
其中
px指的是屏幕實際分辨率，如小米2s的分辨率爲720px * 1280px
dpi=160*density,如小米2s的分辨率爲320
其中小米2s爲360dp
手機：大部分手機的dp均爲320,但這也由density來決定
type value
ldpi 120dpi
mdpi 160dpi
hdpi 240dpi
xdpi 320dpi
tvdpi 213dpi
pad：大部分pad的dp均在600以上
sw600dp
(10'')800x1280 213dpi dp=601(sw600dp或sw600dp-mdpi中的資源寬爲600，佔滿屏幕的3/4，sw600dp-xdpi中的資源寬爲600，只佔3/8)
(7'') 600x1024 160dpi dp=600(sw600dp或sw600dp-mdpi中的資源寬爲600，佔滿屏幕寬，sw600dp-xdpi中的資源寬爲600，只佔一半)
240x320 ldpi
320x480 mdpi
480x800 hdpi
720x1280 xhdpi