What are the differences between drawable-(hdpi, mdpi, ldpi) and WVGA, hvga, and qvga in Android development? What are the differences among XGA, wxga, wuxga, and wsxga +?

1. Differences between drawable-(hdpi, mdpi, ldpi)
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.

2. 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

3. Contact drawable-(hdpi, mdpi, ldpi) and WVGA, hvga, and qvga
Hdpi mainly contains high-resolution images, such as WVGA (480x800) and fwvga (480X854)
The mdpi mainly contains medium-resolution images, such as hvga (320x480)
Ldpi uses low-resolution images, such as qvga (240x320)
The system will find the corresponding images in these folders according to the machine resolution.

 

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VGA: The full name is video graphics array. This screen is now extinct in this book. It is a very old screen used in this book and supports a maximum resolution of 640x480, however, some small portable devices are still using this screen.

Svga: Super video graphics array, a replacement for VGA screens. It supports a maximum resolution of 800x600 and a screen size of 12.1 inch, because the pixels are low, the current screen is rarely used.

XGA: Extended graphics array, a type of LCD screen widely used in laptops. Nearly 80% of notebooks on the market use this product. It supports a maximum resolution of 1024x768. The screen size ranges from 10.4 inch, 12.1 inch, 13.3 inch to 14.1 inch, and 15.1 inch.

Sxga +: Super extended graphics array. As an extension of sxga, sxga + is a screen specially designed for laptops. The display resolution is 1400 × 1050. Because the horizontal and vertical distance of the notebook LCD screen is different from that of the ordinary desktop LCD screen, the display accuracy is much higher than that of the ordinary 17 inch desktop LCD screen.

Uvga: The full name of Ultra video graphics array. This type of screen is applied on the base of the 15 inch screen and supports a maximum resolution of 1600x1200. Because of the high requirements on manufacturing processes, the price is also relatively expensive. At present, only a few high-end mobile workstations are equipped with this type of screen.

Wxga (wide extended graphics array): As the wide screen version of a common XGA screen, wxga uses a ratio of to enlarge the screen size. Its maximum display resolution is 1280 × 800. Since its horizontal pixel is only 800, in addition to the 15 inch base, 12.1 inch of the base also uses this type of screen.

Wxga + (wide extended graphics array): This is an extension of wxga with a maximum display resolution of 1280x854. Because its horizontal width ratio is and the non-standard width screen is. Therefore, only a small part of the screen size is 15.2 inch.

Wsxga + (wide super extended graphics array): The display resolution is 1680 × 1050, except for most 15 inch or more wide-screen laptops, at present, the more popular large size LCD-TV also use this type of products.

Wuxga (wide ultra video graphics array): Like uxga in, wuxga screens are rare, with a display resolution of 1920x1200. Because the price is too high, few laptop manufacturers use this screen.