title: Styling the headline of an android dialog
body: <p>I want to style the header of an Android dialog. Here is what a standard android dialog looks like <img src="https://i.stack.imgur.com/HShIl.jpg" alt="enter image description here"></p>
  
  <p>what I want is sth like this which I photoshopped (styled background of header and another text color for it). 
  <img src="https://i.stack.imgur.com/m8D09.png" alt="enter image description here"></p>
  
  <p>I know that it is possible to pass the theme as a parameter to the Dialog()-Constructor. But I don't know how the xml-style elements would look like.</p>