question: @ Override public void drawSeries ( Canvas canvas , Paint paint , List < Float > points , XYSeriesRenderer renderer , float yAxisValue , int seriesIndex , int startIndex ) { paint . setColor ( renderer . getColor ( ) ) ; paint . setStyle ( Style . FILL ) ; int length = points . size ( ) ; XYValueSeries series = ( XYValueSeries ) mDataset . getSeriesAt ( seriesIndex ) ; double max = series . getMaxValue ( ) ; double coef = MAX_BUBBLE_SIZE / max ; for ( int i = 0 ; i < length ; i += 2 ) { double size = series . getValue ( startIndex + i / 2 ) * coef + MIN_BUBBLE_SIZE ; drawCircle ( canvas , paint , points . get ( i ) , points . get ( i + 1 ) , ( float ) size ) ; } }
target:  The graphical representation of a series.