How to properly set line height for Android?

Question

I am a UX architect working with a team of Android developers that are mostly junior. We are having issues properly setting line height in Android.

We are using the

Answer 1

I'll explain this from Android Developer perspective.

Line height usually means text size + "padding" top/bottom.

So, if your designer write line height 19sp and text size 15sp, it means you need to have extra padding 4sp.

19sp - 15sp = 4sp.

To implement it in your layout, use lineSpacingExtra attribute.

Another way to achieve line height is using scale. For example, 1.2. It means, the spacing is 120% of the text size.

In example above, the line height is 19sp and the text size is 15sp. If we translate it into scale, it become.

19/15 = 1.26

To implement it in your layout, use the lineSpacingMultiplier attribute.