Android screen size (from web grooming)

Dip or DP (density-independent pixels)

Length (true length): inches, inch

Pixels per inch dpi (screen density)

Pixels: px

Dip formula: px/dip=dpi/160 (screen pixel/dip = screen density/160), inch = Px/dpi,dip=160*inch

Screen 320*480, the number of pixels in the horizontal direction is 320, the number of pixels in the vertical direction is 480, the resolution is 160 (meaning the number of pixels per inch 160)

So the horizontal direction: 320/160=2 inches

Vertical direction: 480/160=3 inches

The diagonal of the screen is the square root of the 4*9=3.6 (this is often said 3.6-inch screen)

Horizontal dip:160 * 2 inch = 320dip

Vertical dip:160 * 3 inch = 480dip

Different screen corresponding folders

Screen resolution: 1024x600

Density:1 (160)

Folder: values-mdpi-1024x600

Screen resolution: 1024x600

density:1.5 (240)

Folder: values-hdpi-683x400 by 1024/1.5 600/1.5, need to be rounded.

Screen resolution: 800x480

Density:1 (160)

Folder: values-mdpi-800x480

Screen resolution: 800x480

density:1.5 (240)

Folder: values-hdpi-533x320 by 800/1.5 480/1.5, need to be rounded.

ldpi Resources for low-density (ldpi) screens (~120DPI).

MDPI Resources for Medium-density (MDPI) screens (~160DPI). (This is the baseline density.)

hdpi Resources for high-density (hdpi) screens (~240DPI).

xhdpi Resources for extra high-density (xhdpi) screens (~320DPI).

Android screen size (from web grooming)