title: achartengine - different colors for different points and lines
body: <p>I'm using AChartEngine to visualize measurement values in a line chart view. The visualization itself works already however one important part is missing and I have no idea how to implement it. Each circle represents a measurement value and the color of each circle depends on the value of the measurement.
  Does anybody know how to change the color of a circle as shown in the image?  </p>
  
  <p><img src="https://i.stack.imgur.com/GzG5g.png" alt="http://whiterabbitsoftware.com/images/whiterabbit/misc/line_chart.png"></p>
  
  <p>thx and cheers,
  Chris</p>