Here is code for a simple 2D Pie Chart...
double[] data= { 81d, 55d, 39d, 20.6d };
String[] labels= { "BMW M5", "BMW M3", "Viper GTS-R", "Corvette Z06" };
Paint[] paints= { Color.lightGray, Color.green, Color.blue, Color.red };
PieChart2DProperties pieChart2DProperties= new PieChart2DProperties();
PieChartDataSet pieChartDataSet= new PieChartDataSet( "Cars That Own",
data,
labels,
paints,
pieChart2DProperties );
PieChart2D pieChart2D= new PieChart2D( pieChartDataSet,
new LegendProperties(),
new ChartProperties(),
400, 350 );