In my app I have something similar in appearance to labels in GMail app UI. For those who may not know, they look like this (labels are these colorful bars):
In order to achieve similar effect I use nine-patch drawables - for each label I am creating a TextView and assign drawable to it. This is simple solution, but I don't like it. It's not elegant, it is quite slow as shown by profiler, and I just don't think it's the right way to do it.
I changed the design of the UI to make it more "ICS-y", so I removed rounded corners from the labels. And I started thinking how I could replace 9-patch solution. The most obvious thing is to use BackgroundColorSpan. But it has one, small drawback. I want my labels to have some padding. With drawables, it was easy to achieve. With spans, it's harder. To make horizontal padding, I can just add spaces at the beginning and at the end of the string. But how to make vertical padding larger? To clear things up, this is a screenshot of the label with BackgroundColorSpan:
I want to make the colored parts above and below the text larger. I think I should use some kind of MetricAffectingSpan, but I couldn't figure out which one. Or maybe I should write my own? Or, finally, maybe spans are just not able to fulfill my needs and I should stay with images or create a canvas and "manually" draw everything as in GMail app?
The easiest way to do this, and im pretty sure the GMAIL app is making use of it, are shapes.
Just create a custom shape, in your case a rectangle shape with rounded corners and a solid color, and assign this drawable then to the background property of your textview.
A shape is defined in xml. You will assign it as follows:
<TextView
...
android:background="@drawable/my_awesome_shape" />
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