How to set legend labels MPChart

问题

I am trying to customize legend but not able to do so.My purpose is to give different legend labels.I ma using MPChart library to do so.

  ArrayList<BarEntry> entries = new ArrayList<>();
    entries.add(new BarEntry(4f, 0));
    entries.add(new BarEntry(8f, 1));
    entries.add(new BarEntry(6f, 2));
    entries.add(new BarEntry(12f, 3));
    entries.add(new BarEntry(18f, 4));
    mColors.add(R.color.red);
    mColors.add(R.color.text_color_gray);
    mColors.add(R.color.text_color_blue);
    mColors.add(R.color.green);
    mColors.add(R.color.black);
   BarDataSet dataset = new BarDataSet(entries, null);
    ArrayList<String> labels = new ArrayList<String>();
    labels.add("05");
    labels.add("06");
    labels.add("07");
    labels.add("08");
    labels.add("09");
    BarData data = new BarData(labels, dataset);
    Legend legend = mChart.getLegend();
  legend.setEnabled(true);
    legend.setPosition(Legend.LegendPosition.BELOW_CHART_CENTER);
    legend.setForm(Legend.LegendForm.SQUARE);
    legend.setColors(mColors);
    legend.setLabels(mLabels);
    mChart.setData(data);
    mChart.animateY(2000);

    LimitLine line = new LimitLine(10f);
    YAxis yAxis = mChart.getAxisLeft();
    yAxis.addLimitLine(line);
    yAxis.setDrawAxisLine(true);
    mChart.setDrawValueAboveBar(true);
    mChart.setDrawBarShadow(false);
    mChart.setVisibleXRange(4);
    mChart.moveViewToX(2);
    mChart.setDrawValueAboveBar(false);
    mChart.invalidate();

Please let me know any solution for this.

回答1:

If you want to have 4 legend labels, you need 4 BarDataSet objects.

Having different colours will only group the different colours on the one legend that will be generated.

And you need to pass the colors to the DataSet and it will be mapped with the Legend.

Finally, you DataSets need a label which will be used for the legend. You can specify the label as second parameter in the constructor.

回答2:

you can custom your legend like this

LegendEntry legendEntryA = new LegendEntry();
legendEntryA.label = "a";
legendEntryA.formColor = Color.GREEN;

And add them to legend of the chart

legend.setCustom(Arrays.asList(legendEntryA, legendEntryB, legendEntryC, legendEntryD));

来源：https://stackoverflow.com/questions/30185570/how-to-set-legend-labels-mpchart

标签

android

mpandroidchart