Android 图表开源库 GraphView

这几天有个画图表的需求，搜索了一下，画图表的第三方库有ChartView、PhotoView、HoloGraphLibrary、cropper、achartengine和GraphView。
最后用的是GraphView。GraphView最新版是4.0以上的，GraphView 3.X版本和4.X版本差别很大，网上找到的博客都是基于3.X版本，所以写个基于4.0版本的博客记录一下方便以后查阅。
下载地址：GraphView

    LinearLayout llContainer = (LinearLayout) findViewById(R.id.llContainer);        GraphView graphView = new GraphView(this);//数据源：坐标集，BarGraphSeries是柱状图，LineGraphSeries是折线图    LineGraphSeries<DataPoint> series = new LineGraphSeries<>(new DataPoint[]{new     DataPoint(0,0.6),new DataPoint(1,0.3),new DataPoint(2,0.6),new     DataPoint(3,0.3),new DataPoint(4,1.2),new DataPoint(5,0.6),new DataPoint(6,0.9)});        //设置XY轴的下标签        StaticLabelsFormatter formatter = new StaticLabelsFormatter(graphView);        formatter.setHorizontalLabels(new String[]{"2015", "1月", "2月", "3月", "4月"});        formatter.setVerticalLabels(new String[]{"0.3", "0.6", "0.9", "1.2以上"});        graphView.getGridLabelRenderer().setLabelFormatter(formatter);    //    LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(900,500);    //    graphView.setLayoutParams(params);    //    //    //设置X轴的最大最小值        graphView.getViewport().setXAxisBoundsManual(true);        graphView.getViewport().setMinX(4);        graphView.getViewport().setMaxX(8);    //    //        //设置Y轴的最大最小值        graphView.getViewport().setYAxisBoundsManual(true);        graphView.getViewport().setMinY(0);        graphView.getViewport().setMaxY(1.2);        //设置是否可以左右滑动。true时当坐标超出显示界限时可以左右滑动        graphView.getViewport().setScrollable(true);        //单元格的线，GridLabelRenderer.GridStyle.HORIZONTAL只显示水平线，         // GridLabelRenderer.GridStyle.VERTICAL只显示竖线，        //GridLabelRenderer.GridStyle.NONE不显示格线              graphView.getGridLabelRenderer().setGridStyle(GridLabelRenderer.GridStyle.HORIZONTAL);        graphView.getGridLabelRenderer().setHighlightZeroLines(false);//设置标签格式化，isValueX为true时是X轴标签，false时是Y轴标签      graphView.getGridLabelRenderer().setLabelFormatter(new DefaultLabelFormatter() {            @Override            public String formatLabel(double value, boolean isValueX) {                if (!isValueX) {                        return super.formatLabel(value, isValueX);                } else {                    if (value == 7) {                        return 2015.7 + "";                    } else {                    return super.formatLabel(value, isValueX) + "月";                    }                }            }        });        //是否画出小圆圈        series.setDrawDataPoints(true);        //设置折线颜色        series.setColor(Color.RED);        //把坐标集添加到坐标轴        graphView.addSeries(series);        llContainer.addView(graphView);