title: how to Add a Button on the home screen in android?
body: <p>I want to add a button on the home screen and want to code in the click event of that button.
  I have an application which has an activate button,As soon as this activate button is clicked i want that a Button gets created on the home screen and i want to code some database queries in its click event.I have already created that application,Now i want to place the button on the home screen.How do i do that.</p>
  
  <p>Thanks in Anticipation.</p>