Android 在 x 角度上绘制固定值

Question

是否可以创建具有固定 x 和 y 值的图表？我的 x 值类似于 60、90、120、180、250、375、500、750、1000，但 androidplot 根据值之间的相等距离​​创建了 9 个不同的值。

Number[] timestamps = {60, 90, 120, 180, 250, 375, 500, 750, 1000};

我正在使用 mySimpleXYPlot.setDomainStep(XYStepMode.SUBDIVIDE, 9);我想解决方案是围绕这个命令，但我不知道该怎么做。

完整代码:

mySimpleXYPlot = (XYPlot) findViewById(R.id.mySimpleXYPlot);
         Number[] numSightings = {70, 63, 56, 49, 43, 37, 32, 27, 23};

         Number[] timestamps = {
            60, 90, 120, 180, 250, 375, 500, 750, 1000 

         };

         // create our series from our array of nums:
         XYSeries series2 = new SimpleXYSeries(
                 Arrays.asList(timestamps),
                 Arrays.asList(numSightings),
                 "USA");


         mySimpleXYPlot.getGraphWidget().getGridBackgroundPaint().setColor(Color.WHITE);
         mySimpleXYPlot.getGraphWidget().getGridLinePaint().setColor(Color.BLACK);
         mySimpleXYPlot.getGraphWidget().getGridLinePaint().setPathEffect(new DashPathEffect(new float[]{1,1}, 1));
         mySimpleXYPlot.getGraphWidget().getDomainOriginLinePaint().setColor(Color.BLACK);
         mySimpleXYPlot.getGraphWidget().getRangeOriginLinePaint().setColor(Color.BLACK);

         mySimpleXYPlot.setBorderStyle(Plot.BorderStyle.SQUARE, null, null);
         mySimpleXYPlot.getBorderPaint().setStrokeWidth(1);
         mySimpleXYPlot.getBorderPaint().setAntiAlias(false);
         mySimpleXYPlot.getBorderPaint().setColor(Color.WHITE);

         // Create a formatter to use for drawing a series using LineAndPointRenderer:
         LineAndPointFormatter series1Format = new LineAndPointFormatter(
                 Color.rgb(0, 100, 0),                   // line color
                 Color.rgb(0, 100, 0),                   // point color
                 Color.rgb(100, 200, 0));                // fill color


         // setup our line fill paint to be a slightly transparent gradient:
         Paint lineFill = new Paint();
         lineFill.setAlpha(200);
         lineFill.setShader(new LinearGradient(0, 0, 0, 250, Color.WHITE, Color.GREEN, Shader.TileMode.MIRROR));

         LineAndPointFormatter formatter  = new LineAndPointFormatter(Color.rgb(0, 0,0), Color.BLUE, Color.RED);
         formatter.setFillPaint(lineFill);
         mySimpleXYPlot.getGraphWidget().setPaddingRight(2);
         mySimpleXYPlot.addSeries(series2, formatter);

         // draw a domain tick for each year:
         mySimpleXYPlot.setDomainStep(XYStepMode.SUBDIVIDE, 9);
         mySimpleXYPlot.setRangeBoundaries(-20,100, BoundaryMode.FIXED);

         // customize our domain/range labels
         mySimpleXYPlot.setDomainLabel("Frequency (Hz)");
         mySimpleXYPlot.setRangeLabel("Loud pressure (dB)");
         mySimpleXYPlot.getLegendWidget().setVisible(false);

         // get rid of decimal points in our range labels:
         mySimpleXYPlot.setRangeValueFormat(new DecimalFormat("0"));

         //mySimpleXYPlot.setDomainValueFormat(new MyDateFormat());

         // by default, AndroidPlot displays developer guides to aid in laying out your plot.
         // To get rid of them call disableAllMarkup():
         mySimpleXYPlot.disableAllMarkup();

Answer 1

XYStepType.INCREMENT_BY_VALUE

此模式为原点上方和下方的每个值的倍数创建一个刻度。让我们修改快速入门示例如下:

mySimpleXYPlot.setDomainStep(XYStepMode.INCREMENT_BY_VAL, 1);

这会告诉 XYPlot 为每个可见域值 (x) 绘制一个刻度，其中 x 减去 domainOrigin 的模数为零，或者更简单地说，从 domainOrigin 开始在每个增量 1 绘制一个刻度。现在，我们的情节现在看起来像这样:

来自 androidplot reference