使用MPAndroidChart

Question

在我的应用程序中使用饼图。使用以下库

api 'com.github.PhilJay:MPAndroidChart:v3.0.3'。

但面对问题的对齐问题。附上截图，请看一下：

代码：

public static void chartDetails(PieChart mChart, Typeface tf) {
    mChart.animateXY(1400, 1400);
    mChart.getDescription().setEnabled(false);
    mChart.setCenterTextTypeface(tf);
    mChart.setCenterText("");
    mChart.setCenterTextSize(10f);
    mChart.setCenterTextTypeface(tf);
    // radius of the center hole in percent of maximum radius
    mChart.setHoleRadius(45f);
    mChart.setTransparentCircleRadius(50f);
    Legend l = mChart.getLegend();
    l.setVerticalAlignment(Legend.LegendVerticalAlignment.TOP);
    l.setHorizontalAlignment(Legend.LegendHorizontalAlignment.RIGHT);
    l.setOrientation(Legend.LegendOrientation.VERTICAL);
    l.setDrawInside(false);
    mChart.setTouchEnabled(true);
}

Answer 1

最后我得到了解决方案，感谢@Marc Estrada的回答。但是我做了一些更改。

我使用的以下代码，

  public static void chartDetails1(PieChart mChart, Typeface tf) {
    mChart.animateXY(1400, 1400);
    mChart.getDescription().setEnabled(false);
    mChart.setCenterTextTypeface(tf);
    mChart.setCenterText("");
    mChart.setCenterTextSize(10f);
    mChart.setCenterTextTypeface(tf);
    // radius of the center hole in percent of maximum radius
    mChart.setHoleRadius(45f);
    mChart.setTransparentCircleRadius(50f);
    Legend l = mChart.getLegend();
    l.setVerticalAlignment(Legend.LegendVerticalAlignment.TOP);
    l.setHorizontalAlignment(Legend.LegendHorizontalAlignment.RIGHT);
    l.setOrientation(Legend.LegendOrientation.HORIZONTAL);
    l.setWordWrapEnabled(true);
    l.setDrawInside(false);
    mChart.setTouchEnabled(true);
    mChart.setDrawEntryLabels(false);
    mChart.setExtraOffsets(25.f, 0.f, 25.f, 0.f);

    mChart.setUsePercentValues(true);
    mChart.setDragDecelerationFrictionCoef(0.95f);
    mChart.setDrawHoleEnabled(true);
    mChart.setHoleColor(Color.WHITE);
    mChart.setTransparentCircleColor(Color.WHITE);
    mChart.setTransparentCircleAlpha(110);
    mChart.setTransparentCircleRadius(61f);
    mChart.setRotationAngle(0);
    // enable rotation of the chart by touch
    mChart.setHighlightPerTapEnabled(true);
    // mChart.setUnit(" €");
    // mChart.setDrawUnitsInChart(true);
    l.setEnabled(true);
    mChart.highlightValues(null);
    mChart.setUsePercentValues(true);
    /*new*/
    mChart.setHoleRadius(30f);
    mChart.setDrawCenterText(false);
    mChart.setTransparentCircleRadius(35f);

    mChart.getDescription().setEnabled(false);
    mChart.setRotationEnabled(false);

    mChart.setEntryLabelColor(Color.WHITE);
    mChart.setEntryLabelTextSize(9f);

}

public static ArrayList<Integer> colorsList() {
    ArrayList<Integer> colors = new ArrayList<Integer>();

    for (int c : ColorTemplate.MATERIAL_COLORS)
        colors.add(c);

    for (int c : ColorTemplate.JOYFUL_COLORS)
        colors.add(c);

    for (int c : ColorTemplate.COLORFUL_COLORS)
        colors.add(c);

    for (int c : ColorTemplate.LIBERTY_COLORS)
        colors.add(c);

    for (int c : ColorTemplate.PASTEL_COLORS)
        colors.add(c);

    colors.add(ColorTemplate.getHoloBlue());
    return colors;

}
public static PieData pieDatasetSlice(PieDataSet dataSet){
    dataSet.setXValuePosition(PieDataSet.ValuePosition.OUTSIDE_SLICE);
    dataSet.setYValuePosition(PieDataSet.ValuePosition.OUTSIDE_SLICE);
    dataSet.setValueLinePart1OffsetPercentage(100f); /** When valuePosition is OutsideSlice, indicates offset as percentage out of the slice size */
    dataSet.setValueLinePart1Length(0.6f); /** When valuePosition is OutsideSlice, indicates length of first half of the line */
    dataSet.setValueLinePart2Length(0.6f); /** When valuePosition is OutsideSlice, indicates length of second half of the line */
    dataSet.setSliceSpace(0f);
    PieData data = new PieData(dataSet);
    data.setValueTextSize(5f);
    data.setValueTextColor(Color.BLACK);
    data.setValueFormatter(new PercentFormatter());
    return data;
}

添加条目后，添加以下行

    PieDataSet dataSet = new PieDataSet(entries1, null);
    ArrayList<Integer> colors = Constants.colorsList();
    dataSet.setColors(colors);
    PieData data = Constants.pieDatasetSlice(dataSet);

如果要查看每个切片的更多详细信息，请执行以下操作，

• 实现OnChartValueSelectedListener

Answer 2

您可以使用外部值来清除小数据的数据集名称。

例如，您可以实现类似的目标：

这是代码。在覆盖PieChart时应该使用此代码。如果您没有覆盖它，则应调整此代码以直接使用PieChart，例如mChart.setData();而不是setData();。

PieDataSet dataSet = new PieDataSet(entries, null);
dataSet.setSliceSpace(3f);
dataSet.setIconsOffset(new MPPointF(0, 40));
dataSet.setSelectionShift(5f);

// Outside values
dataSet.setXValuePosition(PieDataSet.ValuePosition.OUTSIDE_SLICE);
dataSet.setYValuePosition(PieDataSet.ValuePosition.OUTSIDE_SLICE);
dataSet.setValueLinePart1OffsetPercentage(100f); /** When valuePosition is OutsideSlice, indicates offset as percentage out of the slice size */
dataSet.setValueLinePart1Length(0.6f); /** When valuePosition is OutsideSlice, indicates length of first half of the line */
dataSet.setValueLinePart2Length(0.6f); /** When valuePosition is OutsideSlice, indicates length of second half of the line */
setExtraOffsets(0.f, 5.f, 0.f, 5.f); // Ofsets of the view chart to prevent outside values being cropped /** Sets extra offsets (around the chart view) to be appended to the auto-calculated offsets.*/

PieData data = new PieData(dataSet);
data.setValueTextSize(10f);
data.setValueTextColor(Color.BLACK);
setData(data);