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DP (DIP): device independent pixels (unit independent pixels). Different devices have different display effects, this is related to the device hardware, generally we support WVGA, HVGA and QVGA recommend this, do not rely on pixels.Px:pixels (pixels). Different devices show the same effect, generally we hvga represent 320x480 pixels, this use more.Pt:point, is a standard length unit, 1pt=1/72 inches, for the printing industry, very simple to use;sp:scaled pixels (enlarge pixels). Mainly used for

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

[Dip:device independent pixels (device independent pixel). Different devices have different display effects, this is related to the device hardware, we generally support the WVGA, HVGA and QVGA recommended to use this, do not rely on pixels. Px:pixels (Pixel). Different devices display the same effect, generally we hvga represent 320x480 pixels, this use more. Pt:point, is a standard length unit, 1pt=1/72 inches, used in the printing industry, is very simple and easy to use; sp:scaled pixels

are shorter than the phone screen, some are longer than the screen, on the tablet and mobile phone compared to the difference is more obvious.DipExactly the same as DP, except the name is different. The dip was used in earlier versions of Android, and the DP name was later recommended for unification with SP.Sp:Abstract pixels independent of scale (Scale-independent Pixel). The SP and DP are similar but the only difference is that the Android system

1. px (pixels) pixels-is a pixel, which is the actual pixel unit on the screen. Dip or dp (device independent pixels) device independent pixels, related to the device screen. Sp (scaled pixels-best for text size): similar to dp, it mainly deals with the font size. Dpi (dot per inch): screen pixel density, how many pixels per inch There is a member with the same name in the android api. The method is as follows: 2. dpi indicates the pixel density of t

/*** DP, SP conversion to PX tool class** @author Fxsky 2012.11.12**/public class Displayutil {/*** Convert PX value to dip or DP value to ensure size unchanged** @param pxvalue* @param scale* (attribute density in Displaymetrics Class)* @return*/public static int Px2dip (context context, float Pxvalue) {Final float scale = context.getresources (). Getdisplaymetrics (). density;return (int) (Pxvalue/scale + 0.5f);}/*** Convert dip or DP values to PX v

Dip: Device Independent pixels (device independent pixels). Different devices have different display effects. This is related to the device hardware. Generally, to support WVGA, hvga, and qvgaWe recommend that you use this,Pixel independent.Px: pixels (pixels). Different devices have the same display effect. Generally, we use hvga to represent 320x480 pixels, which is usually used.PT: point, a standard unit of length, 1pt = 1/72 inch, used in the printing industry, very easy to use;

Document directory 1: Main Screen Size 2: Mobile Phone size 1: pixel (PX) 2: Resolution resolution 3: density Density 4: DPI densitydpi 5: Dip (DP) device independent Pixel Note: There is a formula 6: SP pixel Amplification 7: Resolution of each screen I have never been very clear about the cell phone size and screen resolution, so I spent some time learning about it and make a summary. If something is wrong, I still hope to correct it.

Px: The pixel of the screen.In: inchesMM: mmPT: LB, 1/72 inchDP: an abstract unit based on density. If a screen of DPI is displayed, 1dp = 1px.Dip: equivalent to DPSP: similar to DP, but it also scales according to the user's font size preference.We recommend that you use SP as the unit of text, and dip for others. The following is an overview of the relationship between DIP and PX: The following figure shows the resolution information density, which

different mobile phones, you will find that the horizontal line on some mobile phones is shorter than the mobile phone screen, and some are longer than the screen, the differences between tablets and mobile phones are more obvious.Dip: It is exactly the same as DP, but the name is different. Dip was used in earlier Android versions. We recommend that you use the DP name for consistency with sp.SP: Scale-independent pixel ). SP is similar to DP, but t

Px, dp, and sp used in android DevelopmentFirst, we will introduce these units: Px: pixels (pixels), which corresponds to the actual pixels on the screen. Dip: device independent pixels, which is a density-independent pixel. It is an abstract unit based on screen density. On a display at 160 o'clock per inch, 1dp = 1px, that is, the 1: 1 relationship. (Dp is dip)Sp: scaled pixels (enlarged pixels). pixels i

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