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Hello I am Android Developer, working on android application. I require to make all drawables for all density for my android app. Is there any standard ratio I should keep for that and any tool for that. Any idea ?

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    what is a 'drawable'? – DA01 Aug 29 '14 at 18:47
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This is android's guidelines for icons.

36x36 for low-density 48x48 for medium-density 72x72 for high-density 96x96 for extra high-density

enter image description here

here: http://developer.android.com/guide/practices/screens_support.html

Refer: https://stackoverflow.com/questions/17261344/drawable-sizes-for-different-screen-sizes-in-android

https://stackoverflow.com/questions/8255985/how-to-support-different-screen-size-in-android

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If you have Photoshop, it would be good for generating different size drawables.

So giving a example if I like to generate a icon say 48x48dp (Now as per Google dp is density independent pixel, 1dp=1pixel on a 160 dpi screen).

  1. So first create a new document in PS of size 48x48 pixels with ppi set to 160. Draw/Paste your image and save it.

    Now generally there are 5 types of screens low (120 dpi), medium (160 dpi), high (240 dpi), extra high (320 dpi) and 2*extra high (480 dpi).

  2. We have already created Icon for 160dpi screen, now change the image PPI (keeping aspect ratio same) to 120/240/320/480 and you'll have drawables for all screens. Put them in respective folders. Cheers !

(You can use other softwares too for changing image size/resolution)

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I've created a script that exports to multiple sizes. It references Androids docs here. I've already included the Android recommended values but you can create your own export icon set.

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you can use this link for all sizes

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