我正在尝试在我的nexus7上设置壁纸，无论我尝试什么，蓝色的"庄稼" 小部件，允许您指定壁纸的图像区域始终处于错误的方向。因此，当我尽可能大的窗口小部件时，它只覆盖了一部分图像。图像尺寸为1280x800，所以我应该能够使用整个图像，但我不能因为它似乎总是让方向错了。我试过旋转它，这似乎没有差异。调整大小窗口小部件始终与我想要的相反。它几乎好像它检测到图像的纵横比，并与它应该做的事情相反。我确保图像不包含任何可以指定另一个方向的元数据。我相信我必须有一些我对这个小部件如何工作的误解。它让我疯了！
我附上了一个屏幕截图，让它更清楚我的意思：
I'm trying to set the wallpaper on my Nexus7, and no matter what I try, the blue "crop" widget that lets you specify the area of the image that is the wallpaper is always in the wrong orientation. So when I make this widget as large as possible, it's only covering part of the image. The image size is 1280x800, so I should be able to use the whole image, but I can't because it seems to be always getting the orientation wrong. I've tried rotating it, this doesn't seem to make a difference. The resize widget is always the opposite of what I want it to be. It's almost as if it's detecting the image's aspect ratio and doing the opposite of what it should be doing. I've made sure the image doesn't contain any meta data which could be specifying another orientation. I'm sure there must be something I'm misunderstanding about how this widget works. It's driving me nuts though!
I've attached a screenshot to make it more clear what I mean:
看起来你描述的是实际上是正确的行为，尽管它没有特别明显为什么这就是这样。
android默认情况下，在您在主屏幕上滑动时向左和向右滚动左右壁纸。这意味着有一种"虚拟" 桌面代表主屏幕页面的集合，它（基本上是定义）大于屏幕的分辨率。一般规则是，虚拟桌面的分辨率将是2x 更广泛而不是屏幕的物理分辨率，但高度将是相同的。
因此，当Android正在为您的1280x800屏幕裁剪图像时，它实际上尝试创建一个宽高比的壁纸，与您的1280x1600虚拟桌面相连。因此，如果您使用的图像是1280x800（如您的屏幕），则会在过程中裁剪和缩放。
如果您想制作一个墙纸，符合虚拟桌面的大小而不裁剪，壁纸的默认分辨率是在Android手机中完全适合主屏幕的默认解决方案？包含一些有用的链接和资源。
It looks like what you're describing is actually the proper behavior, though it's not particularly obvious why that's the case.
Android, by default, scrolls your wallpaper to the left and right when you swipe around your home screen. This means that there's a sort of "virtual" desktop that represents the collection of your home screen pages, and it is (basically by definition) larger than the screen's resolution. The general rule is that the resolution of the virtual desktop will be 2x wider than the screen's physical resolution, but the height will be the same.
Therefore, when Android is cropping your image for your 1280x800 screen, it's actually attempting to create a wallpaper with an aspect ratio that lines up with your 1280x1600 virtual desktop. Thus, if the image you use is 1280x800 (like your screen), it will be cropped and scaled in the process.
If you'd like to make a wallpaper that fits the sizing of your virtual desktop without any cropping, What is the default resolution of a wallpaper that fits the homescreen exactly in an Android phone? contains some useful links and resources.
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