How to create a custom theme and use it in an Android application?

Question

How to create a custom themes and use it in the code?

In menu how to implement theme option and apply for the activity?

Answer 1

This is perfect site which creates all the necessary files you need to make a custom UI. I used it personally a couple of weeks ago and it worked great for me.

I have no affiliation with this site but found it very interesting. Hope this may help you :)