LineSeries series = new LineSeries();
// set the stroke thickness to 2
series.setStrokeThickness(Util.getDimen(TypedValue.COMPLEX_UNIT_DIP, 2));
// bind to the 'category' field of the ViewModel object
series.setCategoryBinding(new FieldNameDataPointBinding("category"));
// bind to the 'value' field of the ViewModel object
series.setValueBinding(new FieldNameDataPointBinding("value"));
// set the data source
series.setData(getDataSource());
// add LineSeries to the chart's series collection
cartesianChart.getSeries().add(series);