title: Draw area between two lines using Canvas on Android
body: <p>I'm developing a simple statistical graphics class for my application. I've tried aChartEngine and others more, but I prefer use my own classes.
  I'm drawing the graphics with the Canvas class that includes Android, but the problem is that I don't know how to fill the area between the line and the bottom  border.
  Right now, the rectangles don't fill all the area, obviously, do You know any solution? Thanks a lot.</p>
  
  <p><img src="https://i.stack.imgur.com/lUAwV.png" alt="This is my chart"></p>