单击条形图条目时如何获取标签图例？

Question

我正在尝试以下行为：
单击条形图条目时，我想获取相应的图例标签（SF Zoo 或 LA Zoo）

构建 BarDataSet 的代码：

List<IBarDataSet> barDataSetList = new ArrayList<>();
for (Map.Entry<String, List<Float>> entry : hashMapCategorySpending.entrySet()) {
    String category = entry.getKey(); // here category is either SF Zoo or LA Zoo
    List<Float> values = entry.getValue();
    List<BarEntry> valuesConverted = convertToBarEntryArray(values); // some utility function

    BarDataSet barDataSet = new BarDataSet(valuesConverted, category); // create BarDataSet
    barDataSet.setColor(StatisticsCategoryFragment.categoryColorHashMap.getOrDefault(category, 0));
    barDataSetList.add(barDataSet);
}

/* Set data to chart */
BarData barData = new BarData(barDataSetList);
barData.setValueTextSize(12.5f);
barChart.setData(barData);

我的问题是，当覆盖 setOnChartValueSelectedListener 时，我无法将 Entry e 转换为有用的东西：

 barChart.setOnChartValueSelectedListener(new OnChartValueSelectedListener() {
            @Override
            public void onValueSelected(Entry e, Highlight h) {
                BarEntry barDataSet = (BarEntry) e; // Doesn't help at all 
                // I want to do something like e.getLegendLabel(); and it should return SF Zoo or LA Zoo
            }

            @Override
            public void onNothingSelected() {

            }
        });

Answer 1

想通了。您可以从 Highlight h 对象中获取信息：

String category = barChart.getLegend().getEntries()[h.getDataSetIndex()].label;

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