CODEWITHSUNDEEP
androidresourcespixel
user3843164
user3843164

Reputation: 379

Android resources for different densities

Ok so I know questions about resources for different densities have already been asked, however I ran into a problem, which is why this question is different. Ok so on the android developers website here http://developer.android.com/training/multiscreen/screendensities.html it's stated to use the scale of 1.0 for mdpi, 1.5 for hdpi, 2.0 for xhpdi, and so forth. But the problem is this scale appears to be wrong. If I make an image that is 480x800 for the nexus 1, it will take up the entire screen. If I divide this by 1.5 to get the mdpi version which is the baseline, I will get 320x533.34 approximately. Now lets try multiplying this by 2.0 to get xhdpi version. You will get 640x1066.68. In other words, on a nexus 4 with xdpi and resolution of 768x1280, the image will NOT take up the whole screen. The scaling is not accurate. So I made an image that takes up the whole screen of the nexus 1, then scaled it according the the scale given by the android developers, and for other screens the image will not take up the whole screen. I want a scale that will give me complete accuracy. Thanks!

Upvotes: 0

Views: 95

Answers (2)

Kevin Coppock
Kevin Coppock

Reputation: 134684

MDPI is 1.0 as you said, not 1.5. If you create an image that is 480x800 in the MDPI folder, it will be scaled up to 720x1200 on an HDPI device, or 960x1600 on an XHDPI device. You're never going to get an image which properly fits all screens -- there are just too many aspect ratios and resolutions to do that properly. Try to avoid that design philosophy altogether if possible (e.g. maybe have a nine-patch image in the center with a stretchable region on the edges), or set the image to scale and crop to fit (e.g. scaleType="centerCrop") and keep important parts of the image away from the sides of the screen to allow for some wiggle room.

Upvotes: 1

CommonsWare
CommonsWare

Reputation: 1006859

In other words, on a nexus 4 with xdpi and resolution of 768x1280, the image will NOT take up the whole screen

It is not supposed to. Density has nothing to do with screen size. I can have an -xhdpi screen that is one inch, one foot, one meter, one mile, or one parsec in diagonal length. Those screens would have drastically different resolutions, but the density would be the same.

Upvotes: 1

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