How to define dimens.xml for every different screen size in android?

When supporting different screen sizes (densities) in Android often the focus is on creating different layouts for every possible screen. I.E.

• ldpi
• mdpi
• hdpi
• xhdpi
• xxhdpi
• xxxhdpi

I designed a layout for an xhdpi screen as a reference, and defined it's dimensions in dimens.xml. Now I want to give support it to every possible screen size. How can I do that?

As far as I know, I can use this tool to figure out the proper dimens.xml for other screen sizes and add it to my project. Is this the right way to do it in my situation?

Another question, do I only need to create dimens.xml for above screen dimensions? If yes then what is w820dp?

Thanks for your help. I need to support phones only (not tablets or other devices).

You have to create Different values folder for different screens . Like

values-sw720dp          10.1” tablet 1280x800 mdpi

values-sw600dp          7.0”  tablet 1024x600 mdpi

values-sw480dp          5.4”  480x854 mdpi 
values-sw480dp          5.1”  480x800 mdpi 

values-xxhdpi           5.5"  1080x1920 xxhdpi
values-xxxhdpi           5.5" 1440x2560 xxxhdpi

values-xhdpi            4.7”   1280x720 xhdpi 
values-xhdpi            4.65”  720x1280 xhdpi 

values-hdpi             4.0” 480x800 hdpi
values-hdpi             3.7” 480x854 hdpi

values-mdpi             3.2” 320x480 mdpi

values-ldpi             3.4” 240x432 ldpi
values-ldpi             3.3” 240x400 ldpi
values-ldpi             2.7” 240x320 ldpi

For more information you may visit here

Different values folders in android

http://android-developers.blogspot.in/2011/07/new-tools-for-managing-screen-sizes.html

Edited By @humblerookie

You can make use of Android Studio plugin called Dimenify to auto generate dimension values for other pixel buckets based on custom scale factors. Its still in beta, be sure to notify any issues/suggestions you come across to the developer.