title: MPAndroidChart click listener on chart
body: <p>I am using <a href="https://github.com/PhilJay/MPAndroidChart" rel="noreferrer">MPAndroidChart</a> and would like to know how to perform click event on following graphs and get the related callback:
  Pie chart: click on particular reason open its detail.
  Bar chart: click on any bar open its detail.
  Stacked Bar chart: click on any bar open its detail.</p>
  
  <p>I need to <strong>get notified when the chart is clicked</strong>.</p>