title: How to add specific points in a GraphView Android?
body: <p>I want to add specific points on <code>GraphView</code> that look like this:</p>
  
  <p><a href="https://i.stack.imgur.com/AwW1S.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/AwW1S.jpg" alt="enter image description here"></a></p>
  
  <p>This is what I have tried:</p>
  
  <pre><code>GraphView graphView = findViewById(R.id.graph_view);
  graphView.getGridLabelRenderer().setNumVerticalLabels(9);
  graphView.getGridLabelRenderer().setNumHorizontalLabels(9);
  PointsGraphSeries&lt;DataPoint&gt; series = new PointsGraphSeries&lt;&gt;(new DataPoint[] {
          new DataPoint(-9, 9),
          new DataPoint(-9, 0),
          new DataPoint(-9, -9),
          new DataPoint(0, 9),
          new DataPoint(0, 0),
          new DataPoint(0, -9),
          new DataPoint(9, 9),
          new DataPoint(9, 0),
          new DataPoint(9, -9)
  });
  graphView.addSeries(series);
  series.setShape(PointsGraphSeries.Shape.POINT);
  </code></pre>
  
  <p>And this is the result:</p>
  
  <p><a href="https://i.stack.imgur.com/S2ckc.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/S2ckc.jpg" alt="enter image description here"></a></p>
  
  <p>Is has nothing to do with what I want to achieve. The dots are not in the exact place like above. How to solve this?</p>