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The unit of relative length of pixel (pixel) is relative to the screen resolution of the display (derived from the css tutorial 2.0 manual ).The unit of relative em length is relative to the font size of the text in the current object. For example, the font size of the text in the current row is not set manually, the default font size relative to the browser (derived from the css2.0 manual ).The default font height of any browser is 16 PX. All unadjus

1. dip: Device Independent pixels (device independent pixel ). different devices have different display effects. This is related to the hardware of the device. We recommend that you use this function to support WVGA, hvga, and qvga without pixels.Note that the dip is related to the screen density, and the screen density is related to the specific hardware. Incorrect hardware settings may cause the dip to fail to be properly displayed. On a display with a screen density of 160, 1dip = 1px, someti

Px: pixel, pixel, the smallest unit displayed on the screen, used for Webpage Design, intuitive and convenient;PT: point, a standard unit of length, 1pt = 1/72 inch, used in the printing industry, very easy to use;EM: %. In CSS, 1em = 100% is a ratio, which is used in combination with CSS inheritance relationships and is flexible.PPI (DPI): pixel (DOT) per inch, number of pixels (points) per inch, which is a rate, indicating "resolution" and "accuracy

Reprinted from: http://blog.sina.com.cn/s/blog_42cdca7d0100qcep.html Pt (point, LB) is a physical length unit, which refers to 1 inch of 72 points.Pixel (pixel) is a virtual length unit, which is the unit of the digital image length of a computer system. To convert px to a physical length, you must specify the precision DPI (Dots Per Inch, the number of pixels per inch. DPI is generally available for scanning and printing. In Windows, the default valu

Dpi, ppi, dip, dp, px, sp, dpippi Basic Concepts 1. dpi (dots per inch): The number of dots per inch; ppi (Pixel per inch): The number of dots per inch. Designed for the monitor, dpi = ppi. 2. dip (device independent pixels) devices are independent pixels. Different devices have different display effects, which are related to device hardware and do not depend on pixels. 3. dp (Density-independent pixel), an abstract unit based on screen Density. 1

1 px pixels per pixel and device for devices such as 480 * 320 resolution of the phone, the landscape is 480 pixels in length and 320 pixels vertically. More pixels at fixed length, higher pixels, smaller pixels, sharper images.2. DPI:d ots per inch pixel number, common value 120,160,240,320. Corresponding to the Low,medium,high,xhigh, DPI value, and device-related (the same size of the phone resolution has a high bottom), such as the 320* 240 mobile

2 + width pixel number 2)/Screen diagonal inchesDp:density-independent pixels, with 160PPI screen as standard, then 1dp=1px,Conversion formulas for DP and PX:dp*ppi/160 = px. such as 1DP x 320ppi/160 = 2px.Sp:scale-independent pixels, which is the font unit for Android, is the standard 160PPI screen, when the font size is 100%, 1sp=1px.conversion formula for SP and px : sp*ppi/160 = pxIt concludes that:PX

Android in Dip, DP, PX, SP and screen density 1. Dip:device independent pixels (device independent pixels). Different devices have different display effects, this is related to the device hardware, generally we support WVGA, HVGA and QVGA recommended use this, do not rely on pixels.It is important to note that dip is related to screen density and that the screen density is related to specific hardware and that the hardware settings are incorrect and m

This article is important to explain the difference between px,em,rem,pt and the conversion between the four.EM units have the following characteristics1. The value of EM is not fixed;2. Em inherits the font size of the parent element.When we write CSS, if we want to use EM as the unit, we need to pay attention to two points:1. Declare font-size=62.5% in the body selector;2. Divide your original PX value by

, for example, 160, when dip is used, an exception is displayed, which is usually too small. DP: density-independent pixels: It is the same as dip. An abstract unit based on screen density. 1dp = 1px on a display at 160 o'clock per inch. Px: pixels, pixels: The dots on the screen show the same effect on different display screens of different devices. This is an absolute pixel, and the value will never change. SP: scaled pixels-bestfor text size, am

Android-screen adaptation to px to dip, android adaptation to pxdip Reprinted please indicate the source: http://blog.csdn.net/l1028386804/article/details/47356583 All the kids shoes that have been developed for Android are aware that, due to the diversity of Android mobile phone screens, screen adaptation issues are involved if you want your own apps to run well on Android phones with different screens. In many cases, the design drawings provided b

I know the differences among px, dpi, dp, dip, sp, in, and pt, pxdpi Px: That is, pixels. 1px indicates a physical pixel on the screen; The unit of px is not recommended, because the actual size of the same px image may be different on different mobile phones. Dpi: The abbreviation of dot per inch is the number of dots

In development, you may need to dynamically set the size of the controlFor example, set the width for a gridview:Linearlayout.layoutparams linearParams2 = (linearlayout.layoutparams) head_gridview.getlayoutparams (); int realwidth = utils.dp2px (context, +), linearparams2.width= (Headadapter.getcount ()) * (realwidth); linearparams2.height=30; Head_gridview.setlayoutparams (LINEARPARAMS2);At this point we set a fixed number directly to the width, which is treated as a pixel,

First of all, px, EM, rem are relative units;PX (pixel pixels) is relative to the display screen resolution, IE cannot adjust those using PX as the unit of the font size;EM is relative to the size of the text font within the current object, such as the default font size for the browser if the font size of the current inline text is not artificially set. (quoted i

in CSS, the units of measure are divided into two types:Relative Unit: px/em/ex/%Absolute unit: CM/PT/IN/PC/MMspecific explanations of these unitsPxRelative length units. Pixels (Pixel).Pixels are relative to the display screen resolution. For example, the resolution used by wondows users is typically 96 pixels per inch. The resolution used by Mac users is typically 72 pixels per inch.EmRelative length units. The font size relative to the text within

HTML Font Size setting unit pt differs from PX Font size of the set units, commonly used in 2 kinds: px, pt.Basic concepts:px:pixel, pixel, the smallest unit displayed on the screen, for web design, intuitive and convenient;PT:Point, a standard unit of length, 1pt=1/72 inch, for printing, very simple to use;em: that is,%, in CSS, 1em=100%, is a ratio that combines CSS inheritance relationships with fl

Most of the domestic designers like to use PX, and most of the foreign sites like to use EM, then what is the difference between the two, and what are their pros and cons?1. IE cannot adjust the font size using PX as the unit;2. Most of the foreign sites can be adjusted because they use the EM as a font unit;3. Firefox can adjust px and em, but more than 96% of C

Pxpx Pixels (Pixel). Relative length units. Pixel px is relative to the display screen resolution.PX Features 1. IE cannot adjust the font size using PX as the unit; 2. Most of the foreign sites can be adjusted because they use EM or REM as font units; 3. Firefox can adjust PX and em,rem, but more than 96% of Chinese netizens use IE browser (or k

css px,pt,em, REM, percent difference and usage px that is, the average domestic website uses more , The default size is 16px; PT Printing Industry common units em relative units, relative units of parent element properties rem The advantages of combining relative positioning and absolute positioning, relative to the root element html html size is ok conversi