title: MPAndroidChart fill color gradient
body: <p>Is it possible with MPAndroidChart (or any other Android chart library) to fill the chart under the draw line with a gradient color? Something like this:</p>
  
  <pre><code>set1.setFillColor(getResources().getColor(R.drawable.chart_fill));
  </code></pre>
  
  <p>then in <code>chart_fill.xml</code>:</p>
  
  
  
  <pre><code>&lt;shape xmlns:android="http://schemas.android.com/apk/res/android"
      android:shape="rectangle" &gt;
  
      &lt;gradient
          android:angle="90"
          android:endColor="#FF207a54"
          android:startColor="#FFffffff" /&gt;
  
  &lt;/shape&gt;
  </code></pre>