屏幕支持手机,不支持平板电脑

Screen support for mobile phones, not tablet

This 为处理应用程序中的多个屏幕分辨率提供了非常深刻的见解。在这里我仍然很困惑。这个参考说

As you design your UI for different screen sizes, you'll discover that each design requires a minimum amount of space. So, each generalized screen size above has an associated minimum resolution that's defined by the system. These minimum sizes are in "dp" units—the same units you should use when defining your layouts—which allows the system to avoid worrying about changes in screen density.

xlarge screens are at least 960dp x 720dp
large screens are at least 640dp x 480dp
normal screens are at least 470dp x 320dp
small screens are at least 426dp x 320dp  

这是我感到困惑的地方。这些不是横向/平板电脑尺寸吗?对于手机 phone 这不是恰恰相反吗?
那么,是否必须对 phone 说 320dp x 426dp 还是有什么我不明白的?
另外,我必须考虑的人像分辨率是多少。

This is where I have got confused.

此时,landscape/portrait 尚未出现在图片中。考虑一下:

A: What are the dimensions of an A4 sheet?
B: 8.5" x 11"

另一个版本:

A: What are the dimensions of an A4 sheet?
B: In what orientation are you holding the sheet?
A: Landscape
B: 11" x 8.5"

xlarge screens are at least 960dp x 720dp
large screens are at least 640dp x 480dp
normal screens are at least 470dp x 320dp
small screens are at least 426dp x 320dp 

以上尺寸是以横向为方向报告的。

Aren't these the landscape/ tablet dimensions ? For a mobile phone isn't this just the opposite ?

当您决定所有尺寸都将以横向报告时,则不会。

So, does it has to be, say 320dp x 426dp for a phone or is there something I haven't understood? Also, what will be the portrait resolutions I have to consider.

由于我们已经确定了横向尺寸,翻转这些尺寸将为我们提供纵向尺寸尺寸 - 分辨率是完全不同的、与方向无关的分类标准。