我有一个 BarChart,它有一些值设置为 MathHelper.NULL_VALUE,所以它们不会被渲染(它应该在图表中留下空白位置)。但是,空值仍会呈现并且看起来更像 0.0,如下所示。
如果我记录打印的值,我可以看到该系列中存在 NULL_VALUE:
10-23 09:50:24.206: DEBUG/ConsumptionChartBuilder(27359): x:16.0Y:1.0
10-23 09:50:24.206: DEBUG/ConsumptionChartBuilder(27359): x:17.0Y:3.0
10-23 09:50:24.206: DEBUG/ConsumptionChartBuilder(27359): x:18.0Y:1.7976931348623157E308
10-23 09:50:24.206: DEBUG/ConsumptionChartBuilder(27359): x:19.0Y:1.7976931348623157E308
10-23 09:50:24.216: DEBUG/ConsumptionChartBuilder(27359): x:20.0Y:6.0
10-23 09:50:24.216: DEBUG/ConsumptionChartBuilder(27359): x:21.0Y:1.7976931348623157E308
设置/取消设置最小 Y 值不会改变任何东西。
我真的需要区分 0 和 null 并且将点留在条形图之外会导致一些更奇怪的渲染(空格不是正确的宽度)...
有谁知道如何在 AChartEngine BarChart 中不呈现空值?
编辑:一些重现它的代码。
XYMultipleSeriesDataset multipleSeriesDataset = new XYMultipleSeriesDataset();
XYMultipleSeriesRenderer multipleSeriesRenderer = new XYMultipleSeriesRenderer();
XYSeriesRenderer renderer= new XYSeriesRenderer();
//set up renderer(s)
renderer.setColor(Color.RED);
multipleSeriesRenderer = new XYMultipleSeriesRenderer();
multipleSeriesRenderer.setInScroll(true);
multipleSeriesRenderer.setPanEnabled(false, false);
multipleSeriesRenderer.setZoomEnabled(false, false);
multipleSeriesRenderer.setAntialiasing(true);
multipleSeriesRenderer.setShowLabels(true);
multipleSeriesRenderer.setShowLegend(false);
multipleSeriesRenderer.setYLabelsAlign(Paint.Align.LEFT);
multipleSeriesRenderer.setApplyBackgroundColor(true);
multipleSeriesRenderer.setMargins(new int[]{20, 3, 0, 0});
multipleSeriesRenderer.setMarginsColor(Color.WHITE);
multipleSeriesRenderer.addSeriesRenderer(renderer);
multipleSeriesRenderer.setXLabelsAlign(Paint.Align.CENTER);
//text size
final float scale = getResources().getDisplayMetrics().density;
multipleSeriesRenderer.setLabelsTextSize((int)(scale*10+0.5f));
multipleSeriesRenderer.setXLabelsColor(Color.BLACK);
multipleSeriesRenderer.setYLabelsColor(0,Color.BLACK);
multipleSeriesRenderer.setShowAxes(false);
multipleSeriesRenderer.setBackgroundColor(Color.TRANSPARENT);
//set max and min of axis
multipleSeriesRenderer.setYAxisMin(0);
multipleSeriesRenderer.setYAxisMax(10);
multipleSeriesRenderer.setXAxisMax(7.5);
multipleSeriesRenderer.setXAxisMin(0.5);
multipleSeriesRenderer.setBarSpacing(0.1);
//set up series
XYSeries series = new XYSeries("test");
series.add(1, MathHelper.NULL_VALUE);
series.add(2, 1);
series.add(3, 6);
series.add(4, MathHelper.NULL_VALUE);
series.add(5, 0);
series.add(6, 5);
series.add(7, MathHelper.NULL_VALUE);
multipleSeriesDataset.addSeries(series);
//add x labels to replicate my original code
multipleSeriesRenderer.setXLabels(0);
multipleSeriesRenderer.addXTextLabel(1, "Mon");
multipleSeriesRenderer.addXTextLabel(2, "Tue");
multipleSeriesRenderer.addXTextLabel(3, "Wed");
multipleSeriesRenderer.addXTextLabel(4, "Thu");
multipleSeriesRenderer.addXTextLabel(5, "Fri");
multipleSeriesRenderer.addXTextLabel(6, "Sat");
multipleSeriesRenderer.addXTextLabel(7, "Sun");
((LinearLayout)findViewById(R.id.layout_graph)).addView(ChartFactory.getBarChartView(this, multipleSeriesDataset, multipleSeriesRenderer, BarChart.Type.DEFAULT));
编辑编号2:以上代码截图:
空值:
如果我不添加空值,那么图形看起来会像此处所示的那样倾斜,其中条形相互接触。
最佳答案
我建议您不要添加 MathHelper.NULL_VALUE
值。只需添加其他的即可。
关于java - AChartEngine 呈现空值,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/13025981/