achartengine（Google给android提供的绘图工具包）的介绍和使用

//设置坐标轴名称和最大、最小刻度值和标题名称
    private void setChart(XYMultipleSeriesRenderer renderer) {
        renderer.setChartTitle( "Algorithm" );
        renderer.setXTitle( "X Axis" );
        renderer.setYTitle( "Y Axis" );
        renderer.setXAxisMin(0);
        renderer.setXAxisMax(30);
        renderer.setYAxisMin(0);
        renderer.setYAxisMax(200);
    }
    //设置图形渲染属性
    private XYMultipleSeriesRenderer getBarRenderer() {
        XYMultipleSeriesRenderer renderer = new XYMultipleSeriesRenderer();
        SimpleSeriesRenderer simpleSeriesRenderer = new SimpleSeriesRenderer();
        simpleSeriesRenderer.setColor(Color.RED);
        renderer.addSeriesRenderer(simpleSeriesRenderer);
        simpleSeriesRenderer = new SimpleSeriesRenderer();

        simpleSeriesRenderer.setColor(Color.GRAY );
        renderer.addSeriesRenderer(simpleSeriesRenderer);
        setChart(renderer);
        return renderer;
    }
    //获取数据集
    private XYMultipleSeriesDataset getBarDataset() {
        XYMultipleSeriesDataset dataset = new XYMultipleSeriesDataset();

        Random random = new Random();
        for ( int i = 0; i < 2 ; i++) {
            CategorySeries series = new CategorySeries( "Algorithm" + (i + 1));
            for ( int k = 0; k < 10; k++) {
                series.add(50 + random.nextInt() % 150);
            }
            dataset.addSeries(series.toXYSeries());
        }
        return dataset;
    }

XYMultipleSeriesRenderer renderer = getBarRenderer();
        Intent intents = ChartFactory.getBarChartIntent(this, getBarDataset(), renderer, BarChart.Type.DEFAULT);
        startActivity(intents);