@Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);    //    setContentView(R.layout.activity_pie_chart);                double[] values=new double[]{12,14,11,10,19};        int[] colors=new int[]{Color.BLUE,Color.GREEN,Color.MAGENTA,Color.YELLOW,Color.CYAN};                DefaultRenderer renderer=buildCategoryRenderer(colors);        renderer.setZoomButtonsVisible(true);// 显示放大缩小功能按钮        renderer.setZoomEnabled(true);//设置是否能放大        renderer.setChartTitle("饼图示例");// 设置饼图标题        renderer.setChartTitleTextSize(30);// 设置饼图标题大小                        //通过ChartFactory获取饼图        View view=ChartFactory.getPieChartView(this, buildCategoryDataset("Project budget", values), renderer);        view.setBackgroundColor(Color.BLACK);        setContentView(view);    }        //构建数据源CategorySeries    private CategorySeries buildCategoryDataset(String title, double[] values) {                CategorySeries series=new CategorySeries(title);        int k=0;        for(double value:values){            series.add("Project" + ++k +"(" +value+ ")",value);                    }                return series;    }    //绘制饼图    private DefaultRenderer buildCategoryRenderer(int[] colors) {        DefaultRenderer renderer=new DefaultRenderer();// PieChart的主要描绘器        renderer.setLabelsTextSize(15); //设置标签文字大小        renderer.setLegendTextSize(15);// 设置图例字体大小        renderer.setMargins(new int[]{20,30,15,0});                for(int color:colors){            SimpleSeriesRenderer r=new SimpleSeriesRenderer();            r.setColor(color);            renderer.addSeriesRenderer(r);        }                    return renderer;    }