Android xml reference within xml doesn't work

Question

I want to apply the new material design to my android app and have a small problem with my xml file.

16dp


        

Answer 1

You are declaring item elements here, not dimen.
For example this one works:

<resources>

    <dimen name="activity_horizontal_margin">16dp</dimen>
    <dimen name="activity_vertical_margin">16dp</dimen>

    <dimen name="reference">@dimen/activity_horizontal_margin</dimen>

</resources>

Answer 2

you should use <dimen instead of <item and it should work