How can I add center hole in pie chart (Android )? about aachartcore HOT 2 CLOSED

   AAChartModel configurePieChart() {
      return new AAChartModel()
              .chartType(AAChartType.Pie)
              .backgroundColor("#ffffff")
              .title("LANGUAGE MARKET SHARES JANUARY,2020 TO MAY")
              .subtitle("virtual data")
              .dataLabelsEnabled(true)//是否直接显示扇形图数据
              .yAxisTitle("℃")
              .series(new AAPie[] {
                      new AAPie()
                              .name("Language market shares")
                              .innerSize("20%")
                              .data(new Object[][] {
                              {"Java"  ,67},
                              {"Swift",999},
                              {"Python",83},
                              {"OC"    ,11},
                              {"Go"    ,30},
                      })
                      ,
                      }
              );
    }

 .innerSize("20%")