对应用程序的背景，不同的Android设备尺寸 [英] size of app's background for various Android devices
问题描述
我设计一个背景我的应用程序的所有Android设备。 我想这将是图像的像素大小？
I am designing a background for my app for all Android devices. I was thinking what would be the size of the image in pixels?
从开发者网站，我发现下面的公式
From the developer site I found the following equation
PX = DP *（ DPI / 160）
px = dp * (dpi / 160)
然后，PX取决于两个变量。
Then, px depends on two variables.
首先，DP，我们有
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
二，DPI和我们有
Second, dpi and we have
low-density (ldpi) screens (~120dpi).
medium-density (mdpi) screens (~160dpi).
high-density (hdpi) screens (~240dpi).
extra high-density (xhdpi) screens (~320dpi).
那么，我应该把我的可绘制在屏幕的特点呢？我的意思是我应该用尺寸或密度。如果我使用了大小，DP分类我的图片，什么是DPI这些图片？ 如果我使用了密度，DPI，什么是DP这些图片我的图片进行分类？
So where should I put my drawables in the Screen characteristic? I mean should I use "size" or "Density". If I classify my images using the "size" "dp", what is the dpi for these images? and if I classify my images using the "density" "dpi", what is the dp for these images?
我很困惑如何最终的大小我的图片。另外，也许你可以有一个大屏幕尺寸中密度屏幕，对吧？
I am confused on how to finally size my images. Also, Maybe you can have a medium density screen with a large screen size, right?
推荐答案
有很多的很多不同的分辨率在那里。例如可能有4分别不同的设备：
There are many many different resolutions out there. For instance there could be 4 different devices which are:
640 PX ×480的 PX
640 px x 480 px
不同的是，其中一些设备是MDPI，有些是华电国际，xhdpi等。这意味着它们可以被描述为大，中等或XLARGE的屏幕类型。
The difference is, some of these devices are mdpi, some are hdpi, xhdpi etc. meaning they could be described as "large", "medium" or "xlarge" screen types.
因此，对于一个MDPI设备是640x480dp背景是640x480px然而，一种设备，它是640x480dp和华电国际将需要一个背景，是960x720px，你会发现它们是相同的尺寸桶，但有不同的密度，因此，不同的分辨率。
So, for an mdpi device which is 640x480dp the background would be 640x480px however, a device which is 640x480dp and hdpi would need a background which is 960x720px, you'll notice they're the same size "bucket" but have different densities and therefore different resolutions.
所以，如果你只是想你的背景，以适应以及可以预见的，你需要：
So, if you just want your background to fit as well as can be expected you'll need:
- 大xhdpi
- 大tvdpi
- 大华电国际
- 大MDPI
- 大LDPI
（当时同为正常）
- 在正常xhdpi
- 在正常tvdpi
等等等等。
您是不过最好的办法是使用的可拉伸，形状，瓷砖或可转换为一个9修补程序，因为它会在臀部，使每一个背景可为各种设备痛苦的图像。如果你打算这样做，我会找一个资源descrivbing市场上的每一个屏幕尺寸目前并通过编程方法设置它。
You're best bet however is to use an image which can stretch, a shape, tile or can be converted to a 9-patch because it would be a pain in the rump to make every background available for every device. If you were going to do it I would look up a resource descrivbing every screen dimension on the market currently and setting it via programmatic methods.
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