title: Android - Extending CalendarView
body: <p>I want to have a CalendarView that, on the top right corner of each day, shows a small number, which would mean the number of events for that concrete day. </p>
  
  <p>I was doing some research on the topic and, apart from all the solutions previous to the existence of the CalendarView widget, I found little information on how to do that. 
  In <a href="https://stackoverflow.com/questions/6214828/modify-calendarview">this question</a>, for example, it's said that extending CalendarView is quite difficult, so I'm asking you, guys, if anyone has faced a similar problem and can give me some general recommendations, advises, etc. </p>
  
  <p>More concrete information like methods that are meant to be overwritten or code, are also super welcome! </p>
  
  <p>Edit: Maybe it's worth saying that it is the first time that I'm going to extend an Android widget/view.</p>