Question

得到以下代码：

    Legend legend = mChart.getLegend();
    legend.setLabels(new String[]{"aaaaa", "bbbbb", "ccccc"});

此设置无效？是否有另一种设置文本的方法？

Answer 1

我在v3.0.0中找不到方法setCustom（int [] color，String [] labels）。只有你必须传递LegendEntry对象的setCustom（LegendEntry []）。

 List<LegendEntry> entries = new ArrayList<>();

 for (int i = 0; i < titleList.size(); i++) {
     LegendEntry entry = new LegendEntry();
     entry.formColor = colorList.get(i);
     entry.label = titleList.get(i);
     entries.add(entry);
 }

 legend.setCustom(entries);

Answer 2

将标签名称作为第二个参数传递给构造函数PieEntry()。（对于版本＆gt; 3.0.0）

示例：

ArrayList<PieEntry> yvalues = new ArrayList<PieEntry>(); yvalues.add(new PieEntry(8f, "JAN")); yvalues.add(new PieEntry(15f, "FEB")); yvalues.add(new PieEntry(12f, "MAR")); yvalues.add(new PieEntry(25f, "APR")); yvalues.add(new PieEntry(23f, "MAY")); yvalues.add(new PieEntry(17f, "JUNE")); PieDataSet dataSet = new PieDataSet(yvalues, "Election Results"); PieData data = new PieData(); data.addDataSet(dataSet); data.setValueFormatter(new PercentFormatter()); pieChart.setData(data);

Answer 3

您可以使用颜色设置自定义标签：

首先确保Legend已启用。除非启用图例。

legend.setEnabled(true);

使用com.github.PhilJay：MPAndroidChart：v3.0.0： -

legend .setCustom(ColorTemplate.VORDIPLOM_COLORS, new String[] { "aaaaa", "bbbbb", "ccccc"});

setCustom（int [] colors，String [] labels）：设置自定义图例的标签和颜色数组。颜色计数应与标签数量匹配。每种颜色都用于在相同索引处绘制的表单。

Answer 4

1）将依赖关系添加到build.gradle应用级别编译'com.github.PhilJay:MPAndroidChart:v2.1.0' 2）制作功能chartData

 private void chartData() {

        ArrayList<Entry> entries = new ArrayList<>();
        entries.add(new Entry(50, 0));
        entries.add(new Entry(60, 1));


        final int[] piecolors = new int[]{
                Color.rgb(183, 28, 28),
                Color.rgb(27, 94, 32)};

        PieDataSet dataset = new PieDataSet(entries, "");

        ArrayList<String> labels = new ArrayList<String>();
        labels.add("Borrowing");
        labels.add("Pending");


        PieData data = new PieData(labels, dataset);
        dataset.setColors(ColorTemplate.createColors(piecolors)); //
        data.setValueTextColor(Color.WHITE);
        pieChart.setDescription("Description");
        pieChart.setData(data);

    }

3）在chartData()

中致电onCreate()

Answer 5

感谢vikas singh和其他地方的其他提示，这里是我如何解决饼图和图例的着色问题，对于MPAndroidChart v3.0.3：

 private void visualizeAnalytics(ArrayList<Transaction> transactions) {

        PieChart graph = rootView.findViewById(R.id.graph);

        ArrayList<PieEntry> entries = new  ArrayList<>();

        HashMap<String, Integer> categoryFrequencyMap = new HashMap<>();

        for(Transaction T: transactions) {
            String category = T.getType().name();

           if(categoryFrequencyMap.containsKey(category)){
               categoryFrequencyMap.put(category, categoryFrequencyMap.get(category) + T.getAmount());
           }else {
               categoryFrequencyMap.put(category, T.getAmount());
           }
        }

        ArrayList<String> categories = new ArrayList<>();

        int e = 0;
        for(String category: categoryFrequencyMap.keySet()){
            categories.add(e, category);
            entries.add(new PieEntry(categoryFrequencyMap.get(category), category));
            e++;
        }

        PieDataSet categories_dataSet = new PieDataSet(entries, "Categories");

        categories_dataSet.setSliceSpace(2f);
        categories_dataSet.setValueTextSize(15f);
        //categories_dataSet.setValueTextColor(Color.RED);/* this line not working */
        graph.setEntryLabelColor(Color.RED);

        categories_dataSet.setSelectionShift(10f);
        categories_dataSet.setValueLinePart1OffsetPercentage(80.f);
        categories_dataSet.setValueLinePart1Length(1f);
        categories_dataSet.setValueLinePart2Length(0.9f);
        categories_dataSet.setXValuePosition(PieDataSet.ValuePosition.OUTSIDE_SLICE);

        PieData pieData = new PieData(categories_dataSet);

        graph.setData(pieData);

        Legend legend = graph.getLegend();
        List<LegendEntry> legendEntries = new ArrayList<>();

        RandomColor randomColor = new RandomColor();
        int[] colors = randomColor.randomColor(categories.size());

        for (int i = 0; i < categories.size(); i++) {
            LegendEntry legendEntry = new LegendEntry();
            legendEntry.formColor = colors[i];
            legendEntry.label = categories.get(i);
            legendEntries.add(legendEntry);
        }

        categories_dataSet.setColors(colors);

        legend.setEnabled(false);
        legend.setCustom(legendEntries);

        Description description = new Description();
        description.setText("Analyzing Transaction Vol by Category");
        graph.setDescription(description);

        graph.animateY(5000);

        graph.invalidate(); // refresh
}

对于漂亮的随机颜色，我从这里得到：https://github.com/lzyzsd/AndroidRandomColor

MPAndroidChart PieChart如何设置标签文字？

5 个答案: