Design size specification of Android mobile phone user interface

As we all know, Android is open source, and there are many mobile phone manufacturers in China, such as Xiaomi, Meizu, Huawei, oppo and Samsung. Each brand has its own UI design specification, but we mainly analyze the UI interface size specification.

1 font

Android system uses Siyuan bold font in Chinese and robot font in English.

Use only even unit font sizes, such as 24 points, 28 points and 36 points.

2. What exactly do 2.mdpi, hdpi, xhdpi, XHdpI, xxxhdpi, DP and px mean?

Before talking about icons, let's analyze the meaning of a row of English:

Mdpi, hdpi, xhdpi, xxhdpi and xxxhdpi are all screen densities, and the higher the numerical value, the higher the resolution. Commonly used are xxhdpi and xxxhdpi.

Dp is a special unit of length in Android system, which means device-independent pixels. Different devices have different display effects, which is related to the hardware of the device. Most of them are icons, while the text is sp (Enlarged Pixel), which is mainly used for font display of best for textsize.

Px represents pixels, and different devices display the same effect.

From left to right: ① Application bar height: 56dp；; The left and right inner margins of the application bar are16dp; ; The upper and lower left inner margins of the application bar icon are16dp; ; The left inner margin of the application column header is 72dp；; Bottom margin of application column title: 20dp；;

② The height of application column is128 dp; ;

③ The height of the operating lever is 56dp；; Height of title bar: 80dp；; Inner margin at the bottom of the title bar: 8dp；; Height of description area: 72dp；; Bottom margin of description area: 16dp.

5. List height

The vertical frame, horizontal outer edge and left and right outer edges of the frame are16dp; They are; The left margin of content with icons or avatars is 72dp.

Vertical edge

① Status bar: 24dp；; ② Toolbar: 56dp；; ③ Subtitle: 48dp；; ④ List item: 72dp