Droid X 是大屏吗？
阅读文档： http://developer.android.com/guide/practices/screens_support.html 。我判断 Droid X 是一款大屏幕手机，因为它的物理尺寸为 4.3 英寸。但是进一步阅读/探索我意识到 large 修饰符与屏幕尺寸关系不大。
正如文档：
请注意，密度和屏幕尺寸是独立的参数，由系统单独解释。例如，WVGA 高密度被认为是普通屏幕，因为其物理尺寸与 T-Mobile G1 的尺寸大致相同。另一方面，WVGA 中密度屏幕被认为是大屏幕 - 它提供相同的分辨率，但像素密度较低，这意味着它在物理上比基准屏幕大，并且可以比正常屏幕尺寸显示更多信息。
我很困惑，谁能澄清一下。
谢谢。
Reading the documentation: http://developer.android.com/guide/practices/screens_support.html. I judged that Droid X is a large screen phone, since it's physical dimension is 4.3". But reading/exploring further I'm realizing that large modifier has little to do with screen size.
As there's quoted in documentation:
Note that the density and the screen size are independent parameters and are interpreted by the system individually. For example, WVGA high density is considered a normal screen because its physical size is about the same as one of T-Mobile G1. On the other hand, a WVGA medium density screen is considered a large screen — it offers the same resolution but at lower pixel density, meaning that it is both physically larger than the baseline screen and can display significantly more information than a normal screen size.
I'm confused, can anyone clarify.
Thanks.
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实际上，主要是尺寸，尽管他们的方法使它看起来更复杂。 Droid X 是 WVGA 高密度（200-250 像素/英寸），尽管它的屏幕比具有相同像素数的 3.7 英寸 Droid 2 更大。5 英寸+ WVGA 或更高的设备将被视为 WVGA 中-或低密度（160 PPI 或更低），这将被视为大屏幕，因为它的 PPI 较低。
但这就是为什么它不纯粹是物理屏幕尺寸：低 PPI 5 英寸设备将在显示前端受到限制，而不是在交互性前端。也就是说，您可以拥有可管理的可交互 iPad 风格的面板视图，但标签将变得如果它具有 QVGA 分辨率，则模糊且难以阅读，从而使其不切实际，另一方面，5 英寸 WVGA 设备可能可以称为“大”，因为它可以提供清晰的平板电脑式视图，并且仍然提供可用的手指交互。 。
这是一个有点模糊的定义，但我认为（至少作为开发人员）对于应该获得“大”修饰符的一个很好的经验法则可能是“我可以将文件夹列表面板视图塞到右侧吗？”我的电子邮件收件箱列表中仍然可以舒适地使用此设备，而无需眯着眼睛或寻找电容式手写笔？”
It's mostly size, actually, though their method makes it seem more complicated. The Droid X is WVGA high-density (200-250 pixels/inch), even though it's a larger screen than the 3.7" Droid 2 with the same number of pixels. A 5"+ WVGA or higher device would be considered WVGA medium- or low-density (160 PPI or less) though, which would count as large-screen, since it would have fewer PPI.
But here's why it's not purely a physical screen size: a low-PPI 5" device would be limited on the display front, not the interactibility front. That is, you could have a manageably interactible iPad-style paneled view, but labels would become fuzzy and hard to read if it had a QVGA resolution, making it impractical. A 5" WVGA device, on the other hand, probably could qualify as "large" because it could provide legible tablet-style views and and still provide usable finger interactions.
It's a bit of a fuzzy definition, but I'd think (as a developer, at least) a good rule of thumb for what shuold get the "large" modifier might be "Can I cram a folder list panel view to the right side of my email inbox list and still use this device comfortably without squinting or hunting for a capacitive stylus?"
免责声明：不是 Android/移动开发人员。
我认为这确实与物理屏幕尺寸有关。该示例指出，在具有相同分辨率的两个 WVGA 屏幕中，像素密度较高的屏幕必然会更小，因为它将像素封装得更紧密。
我认为他们试图给出如何设计界面的指示。请记住，我们大多数人在 15 英寸显示器上使用 640x480 分辨率，但这并不意味着在 4 英寸屏幕上显示相同的数据是一个好主意。同样，即使您可以将480x800像素打包到1英寸的屏幕上，并不意味着在上面安装虚拟键盘实用。拇指有物理限制，而不是分辨率限制，就像眼睛一样。
对我来说困难的部分是当他们说“可以显示更多信息”时。分辨率通常是一个因素，而不仅仅是物理尺寸，尽管正如我所说，眼睛确实有局限性，因此物理尺寸也很重要。
Disclaimer: Not an Android/mobile developer.
I think it does have to do with physical screen size. The example is noting that of two WVGA screens with the same resolution, the one with the higher pixel density will necessarily be smaller since it's packing the pixels in tighter.
I think they're trying to give an indication of how to design your interface. Remember, most of us have used 640x480 resolutions on 15 inch monitors, but that doesn't make it a good idea to display the same data on a 4 inch screen. Similarly, even if you can pack 480x800 pixels onto a 1 inch screen doesn't mean it will be practical to have a virtual keyboard on it. Thumbs have physical restrictions, not resolution restrictions, as do eyes.
The difficult part for me is when they say "can display significantly more information". Resolution is often a factor there, not physical size alone, although, as I said, eyes do have limitations so physical size is important too.
看来 Droid-X 的屏幕是正常的。我刚刚创建了一个虚拟应用程序，其中包含屏幕尺寸和密度的所有变化（总共 9 种组合），并在 DroidX 模拟器（您可以从 motorola 开发网站获取一个）中运行它，并加载普通 hdpi 资源。
It seems Droid-X has NORMAL screen. I just created a dummy app that contains all the variations of screen-sizes and densities (9 combinations in total) and ran it in the DroidX emulator (you can obtain one from motorola dev site) and it loads normal-hdpi resource.