What is the baseline in RelativeLayout?

Question

What does \"baseline\" refer to when used in the context of a relative layout? Simple question, probably, but the documentation and google offer no hints.

Answer 1

Here is a visual explanation that might clarify Cristian's answer:

This code will look like this:

Now, if I remove the android:layout_alignBaseline attribute, the same layout looks like this:

It's interesting to observe that there is an impact on the orange view's height (in the first case the padding is not applied to the top of the view).