How can I create my own theme for alertDialog?

Question

I want to create a different theme for all of alertDialog instances. I need my own title view instead of the usual black title background. All text should have a blue color,

Answer 1

I solved my problem by creating a class which extends Dialog, and I created my own functions. for example setMessage,setTitle,setPositiveButton,setNegativeButton etc.

But am confusing on how we can replace the setAdapter() and setSingleChoice().