title: how to change the background color of android phone screen
body: <p>I am new in learning Android and so far I have been focused on functionality, but now I am starting to work with layouts.</p>
  
  <p>Issue:--
  My app has a button and on its click, I send a sms to registered number.But as soon as the button is clicked I want change the user's phone screen background color to red and same with the front notification led.(As soon as the user pushes the button, the app finishes....so my idea is , user should know that button was pushed and message is sent. so the background of scrren should be in alert position.)</p>
  
  <p>Is there a way to do this? I was searching net and found that notification led behaves different for different  manufacturers.Is there any generic way to do this, so that the apps behave same in all android phone brands??
   Any code snippet or any hits will be highly appreciated.</p>