Q:

How can we design android layout which are compatible to all mobile screens?

I have taken layout-320dp,layout-360dp,layout-480dp,layout-600dp and layout-720dp but still some of devices are not compatible to it. 

A:

You dont need to create all these layout files. Your app is compatible with all the mobile devices using  layout and layout-large but for tablets you need to use layout-sw600dp and layout-sw720dp for 7" and 10" screens. For more reference visit this link :-
Click here
Hope this help you :)

