Android resolution details

Differences between drawable-hdpi, drawable-mdpi, and drawable-ldpi:

In Versions later than android2.1, there are three directories: drawable-mdpi, drawable-ldpi, and drawable-hdpi. These three directories are mainly used to support multi-resolution.

DPI is the abbreviation of "dot Per Inch". The number of dots per inch.

Four density classifications: ldpi (low), mdpi (medium), hdpi (high), and xhdpi (extra high)

Normal screen: ldpi is 120, mdpi is 160, hdpi is 240, and xhdpi is 320.

 

Differences between WVGA, hvga, and qvga

VGA is the "video graphics array", and the display standard is 640*480.

WVGA (wide VGA) Resolution is 480*800

Hvga (half VGA) means half of VGA resolution is 320*480

Qvga (quarter VGA) means that the non-1/4 resolution of VGA is 240*320

Drawable-(hdpi, mdpi, ldpi) and WVGA, hvga, qvga contact

Xhdpi is added only when Android 2.2 is used.

Xlarge is added only when Android 2.3 is used.

Hdpi mainly contains high-resolution images, such as WVGA (480 × 800) and fwvga (480 × 854) aspect ratio:

The mdpi mainly contains medium-resolution images, such as hvga (320 × 480) aspect ratio:

Ldpi mainly uses low-resolution images, such as qvga (240x320) Aspect Ratio

The system will find the corresponding images in these folders according to the machine resolution.

To be compatible with different screens on different platforms during development, we can crop the image with a aspect ratio, make sure there is sufficient resolution, and put it in the corresponding directory.