分组条形图的MPAndroidChart JSON格式

Question

有没有可用于简单地为分组条形图创建数据集的格式？在网上的文档和示例中找不到任何参考。 我的输出将产生3套Barchart。 第一张图将有4组。第二和第三将有3组。 每组有5套。 （我无法在此处附加照片。不知道为什么它会不断失败） 这是其他网站的链接 https://ibb.co/mTNs1K

目前我是这样做的。

我的JSON

{
"data1": {
    "val1": "2, 2, 2, 4",
    "val2": "5, 1, 1, 3",
    "val3": "3, 2, 3, 2",
    "val4": "1, 2, 3, 4",
    "val5": "7, 1, 1, 1"
},
"data2": {
    "val1": "2, 6, 2",
    "val2": "5, 4, 1",
    "val3": "3, 4, 3",
    "val4": "1, 6, 3",
    "val5": "7, 2, 1"
},
"data3": {
    "val1": "6, 2, 2",
    "val2": "8, 1, 1",
    "val3": "5, 2, 3",
    "val4": "5, 2, 3",
    "val5": "8, 1, 1"
}

}

我的Java

float[] val1 = StrToFloat(val_a1);
        float[] val2 = StrToFloat(val_a2);
        float[] val3 = StrToFloat(val_a3);
        float[] val4 = StrToFloat(val_a4);
        float[] val5 = StrToFloat(val_a5);

        ArrayList<BarEntry> barOne = new ArrayList<>();
        ArrayList<BarEntry> barTwo = new ArrayList<>();
        ArrayList<BarEntry> barThree = new ArrayList<>();
        ArrayList<BarEntry> barFour = new ArrayList<>();
        ArrayList<BarEntry> barFive = new ArrayList<>();


        for (int i = 0; i < val1.length; i++) {
            barOne.add(new BarEntry(i, val1[i]));
            barTwo.add(new BarEntry(i, val2[i]));
            barThree.add(new BarEntry(i, val3[i]));
            barFour.add(new BarEntry(i, val4[i]));
            barFive.add(new BarEntry(i, val5[i]));
        }

        BarDataSet set1 = new BarDataSet(barOne, "Worst");
        set1.setColor(Color.parseColor("#5DADE2"));
        BarDataSet set2 = new BarDataSet(barTwo, "Bad");
        set2.setColor(Color.parseColor("#EC7063"));
        BarDataSet set3 = new BarDataSet(barThree, "Normal");
        set3.setColor(Color.parseColor("#F9E79F"));
        BarDataSet set4 = new BarDataSet(barFour, "Good");
        set4.setColor(Color.parseColor("#48C9B0"));
        BarDataSet set5 = new BarDataSet(barFive, "Very Good");
        set5.setColor(Color.parseColor("#AF7AC5"));

        set1.setHighlightEnabled(false);
        set2.setHighlightEnabled(false);
        set3.setHighlightEnabled(false);
        set4.setHighlightEnabled(false);
        set5.setHighlightEnabled(false);

        set1.setDrawValues(false);
        set2.setDrawValues(false);
        set3.setDrawValues(false);
        set4.setDrawValues(false);
        set5.setDrawValues(false);

        ArrayList<IBarDataSet> dataSets = new ArrayList<IBarDataSet>();

        dataSets.add(set1);
        dataSets.add(set2);
        dataSets.add(set3);
        dataSets.add(set4);
        dataSets.add(set5);

        BarData data = new BarData(dataSets);

        float groupSpace = 0.4f;
        float barSpace = 0.02f;
        float barWidth = 0.1f;
        // (barSpace + barWidth) * 2 + groupSpace = 1
        data.setBarWidth(barWidth);

        mChart.setDrawBarShadow(false);
        mChart.getDescription().setEnabled(false);
        mChart.setPinchZoom(false);
        mChart.setDrawGridBackground(false);
        // empty labels so that the names are spread evenly
        String[] labels = {"", "Objective", "Content", "Presentation", "Assistant", ""};
        IAxisValueFormatter xAxisFormatter = new LabelFormatter(mChart, labels);
        XAxis xAxis = mChart.getXAxis();
        xAxis.setCenterAxisLabels(true);
        xAxis.setPosition(XAxis.XAxisPosition.BOTTOM);
        xAxis.setDrawGridLines(false);
        xAxis.setGranularity(1f); // only intervals of 1 day
        xAxis.setTextColor(Color.BLACK);
        xAxis.setTextSize(12);
        xAxis.setAxisLineColor(Color.WHITE);
        xAxis.setAxisMinimum(1f);
        xAxis.setValueFormatter(xAxisFormatter);

        YAxis leftAxis = mChart.getAxisLeft();
        leftAxis.setTextColor(Color.BLACK);
        leftAxis.setTextSize(10);
        leftAxis.setAxisLineColor(Color.WHITE);
        leftAxis.setDrawGridLines(false);
        leftAxis.setGranularity(1);
        //leftAxis.setLabelCount(8, true);
        leftAxis.setPosition(YAxis.YAxisLabelPosition.OUTSIDE_CHART);

        mChart.getAxisRight().setEnabled(false);
        mChart.getLegend().setEnabled(true);
        // so that the entire chart is shown when scrolled from right to left
        xAxis.setAxisMaximum(labels.length - 1.1f);
        mChart.setData(data);
        mChart.setScaleEnabled(false);
        mChart.setVisibleXRangeMaximum(4f);
        mChart.groupBars(1f, groupSpace, barSpace);
        mChart.invalidate();

        legend = mChart.getLegend();
        legend.setVerticalAlignment(Legend.LegendVerticalAlignment.BOTTOM);
        legend.setHorizontalAlignment(Legend.LegendHorizontalAlignment.LEFT);
        legend.setOrientation(Legend.LegendOrientation.HORIZONTAL);
        legend.setWordWrapEnabled(true);

我的功能

private float[] StrToFloat (String val) {

    String[] parts = val.split(",");
    float[] fval = new float[parts.length];

    for (int i = 0; i < parts.length; ++i) {
        float number = Float.parseFloat(parts[i]);
        float rounded = (int) Math.round(number * 1000) / 1000f;
        fval[i] = rounded;
    }

    return fval;
 }

这仅适用于data1。我必须对data2和data3重复此方法。 我认为有一种更好的方法来处理此类数据。