Längen-Einheiten im Browser:
Vorab:
1dp == 1dip = 0.16mm;
1em = 2,646mm = ~16.6sp (16.54 bzw. 16.666) bei einer Schriftgröße von 100%;
1sp= ~0.06024em bei 100%;
px is one pixel.
sp is scale-independent pixels.
dip is Density-independent pixels. You would use
sp for font sizes 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.
will elaborate more on how exactly does dp convert to px:
If running on hdpi device 150x150 px image will take up 100*100 dp of screen space.
If running on mdpi device 150x150 px image will take up 150*150 dp of screen space.
If running on xhdpi device 150x150 px image will take up 75*75 dp of screen space.
The other way around: say, you want to add an image to your application and you need it to fill 100*100 dp control,
you'll need to create different size images for supported screen sizes:
100*100 px image for mdpi
150*150 px image for hdpi
200*200 px image for xhdpi
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.
