title: android button green
body: <p>i would like to have tha default button but not in gray.</p>
  
  <p>I need to change the color green/blue/red.</p>
  
  <p>I would like to do this thanks to xml but also from the code.</p>
  
  <p>I need to have a green button which change the color of all the other button.</p>
  
  <p>It's why i need to change from xml and from the code.</p>