<com.db.williamchart.view.chart_view
  ...
  app:chart_labelsColor="color"
  app:chart_labelsSize="dimension"
  app:chart_labelsFont="font" 
/>

<com.db.williamchart.view.LinechartView
  ...
  app:chart_lineColor="color"
  app:chart_lineThickness="dimension"
  app:chart_smoothLine=[ "true" | "false" ]
  app:chart_pointDrawable="drawable" 
/>

<com.db.williamchart.view.BarChartView|HorizontalBarChartView
  ...
  app:chart_spacing="dimension"
  app:chart_barsColor="color"
  app:chart_barsBackgroundColor="color"
  app:chart_barsRadius="dimension" 
/>

<com.db.williamchart.view.DonutChartView
  ...
  app:chart_donutThickness="dimension"
  app:chart_donutBackgroundColor="color"
  app:chart_donutRoundCorners="boolean"
  app:chart_donutTotal="float"
/>