title: Android In-app donations
body: <p>I want to implement an option in my app by which users could donate some $. (Donations ofcourse, will <strong>not</strong> be in lieu of additional features)</p>
  
  <p>What is the best way of doing so?
  Paypal? Google Checkout?</p>
  
  <p>Any examples/ api that I can use to simplify this?</p>