Android – What is the approach to use to let the user choose from a small list of time-related options?

I'm working on an app and I want to show the user how much he's paying for services he's got enabled.

I want the user to be able to choose to display the cost per day, week, month and year.

To let him switch between this cases, I'm using a spinner with a dropdown menu, but I'm not sure this is the right way to go.

Any advice would be appreciated.

This is how the menu looks right now: