如何在MPAndroidChart中设置xAxis的字符串值？
如何在MPAndroidChart中设置xAxis的字符串值？
提问于 2017-07-26 15:39:52
我想制作折线图，但在xAxis中显示数值字符串有问题，我使用了从MPAndroidChart到LineChart的库Github。请告诉我如何添加字符串值和实际我想问的很多问题
private void drawLineChartLine(){
private float[] yDataL = {40, 60, 70, 80};
private String[] xDataL = {"Week 1", "Week 1" , "Week 3" , "Week 4"};
ArrayList<Entry> yEntrys = new ArrayList<>();
final ArrayList<String> xEntrys = new ArrayList<>();
for(int i = 0; i < yDataL.length; i++){
yEntrys.add(new Entry(yDataL[i] ,i));
}
for(int i = 1; i < xDataL.length; i++){
xEntrys.add(xDataL[i]);
}
//create the data set
LineDataSet lineDataset = new LineDataSet(yEntrys, "assa");
XAxis xAxis = lineChart.getXAxis();
xAxis.setPosition(XAxis.XAxisPosition.BOTTOM);
xAxis.setDrawGridLines(false);
xAxis.setValueFormatter(new IAxisValueFormatter() {
@Override
public String getFormattedValue(float value, AxisBase axis) {
return xEntrys.get((int) value);
}
});
LineData lineData = new LineData(lineDataset);
lineChart.setData(lineData);
lineChart.invalidate();
}我弄错了
索引40无效，大小为%6
在代码中
xAxis.setValueFormatter(new IAxisValueFormatter() {
@Override
public String getFormattedValue(float value, AxisBase axis) {
return xEntrys.get((int) value);
}
});回答 10
Stack Overflow用户
发布于 2019-07-09 13:22:56
根据新的更新v3.1.0，IAxisValueFormatter方法已弃用。
因此通过使用com.github.mikephil.charting.formatter.IndexAxisValueFormatter，我们可以在x轴上显示月份列表
private List<Entry> getIncomeEntries() {
ArrayList<Entry> incomeEntries = new ArrayList<>();
incomeEntries.add(new Entry(1, 11300));
incomeEntries.add(new Entry(2, 1390));
incomeEntries.add(new Entry(3, 1190));
incomeEntries.add(new Entry(4, 7200));
incomeEntries.add(new Entry(5, 4790));
incomeEntries.add(new Entry(6, 4500));
incomeEntries.add(new Entry(7, 8000));
incomeEntries.add(new Entry(8, 7034));
incomeEntries.add(new Entry(9, 4307));
incomeEntries.add(new Entry(10, 8762));
incomeEntries.add(new Entry(11, 4355));
incomeEntries.add(new Entry(12, 6000));
return incomeEntries.subList(0, 12);
}Oncreate方法中的
ArrayList<ILineDataSet> dataSets = new ArrayList<>();
List<String> xAxisValues = new ArrayList<>(Arrays.asList("Jan", "Feb", "March", "April", "May", "June","July", "August", "September", "October", "November", "Decemeber"));
List<Entry> incomeEntries = getIncomeEntries();
dataSets = new ArrayList<>();
LineDataSet set1;
set1 = new LineDataSet(incomeEntries, "Income");
set1.setColor(Color.rgb(65, 168, 121));
set1.setValueTextColor(Color.rgb(55, 70, 73));
set1.setValueTextSize(10f);
set1.setMode(LineDataSet.Mode.CUBIC_BEZIER);
dataSets.add(set1);
//customization
LineChart mLineGraph = findByViewId(R.id.line_chart);
mLineGraph.setTouchEnabled(true);
mLineGraph.setDragEnabled(true);
mLineGraph.setScaleEnabled(false);
mLineGraph.setPinchZoom(false);
mLineGraph.setDrawGridBackground(false);
mLineGraph.setExtraLeftOffset(15);
mLineGraph.setExtraRightOffset(15);
//to hide background lines
mLineGraph.getXAxis().setDrawGridLines(false);
mLineGraph.getAxisLeft().setDrawGridLines(false);
mLineGraph.getAxisRight().setDrawGridLines(false);
//to hide right Y and top X border
YAxis rightYAxis = mLineGraph.getAxisRight();
rightYAxis.setEnabled(false);
YAxis leftYAxis = mLineGraph.getAxisLeft();
leftYAxis.setEnabled(false);
XAxis topXAxis = mLineGraph.getXAxis();
topXAxis.setEnabled(false);
XAxis xAxis = mLineGraph.getXAxis();
xAxis.setGranularity(1f);
xAxis.setCenterAxisLabels(true);
xAxis.setEnabled(true);
xAxis.setDrawGridLines(false);
xAxis.setPosition(XAxis.XAxisPosition.BOTTOM);
set1.setLineWidth(4f);
set1.setCircleRadius(3f);
set1.setDrawValues(false);
set1.setCircleHoleColor(getResources().getColor(R.color.pie_color_4));
set1.setCircleColor(getResources().getColor(R.color.pie_color_4));
//String setter in x-Axis
mLineGraph.getXAxis().setValueFormatter(new com.github.mikephil.charting.formatter.IndexAxisValueFormatter(xAxisValues));
LineData data = new LineData(dataSets);
mLineGraph.setData(data);
mLineGraph.animateX(2000);
mLineGraph.invalidate();
mLineGraph.getLegend().setEnabled(false);
mLineGraph.getDescription().setEnabled(false);Stack Overflow用户
发布于 2019-02-19 17:49:12
public class IndexAxisValueFormatter extends ValueFormatter
{
private String[] mValues = new String[] {};
private int mValueCount = 0;
/**
* An empty constructor.
* Use `setValues` to set the axis labels.
*/
public IndexAxisValueFormatter() {
}
/**
* Constructor that specifies axis labels.
*
* @param values The values string array
*/
public IndexAxisValueFormatter(String[] values) {
if (values != null)
setValues(values);
}
/**
* Constructor that specifies axis labels.
*
* @param values The values string array
*/
public IndexAxisValueFormatter(Collection<String> values) {
if (values != null)
setValues(values.toArray(new String[values.size()]));
}
@Override
public String getFormattedValue(float value, AxisBase axisBase) {
int index = Math.round(value);
if (index < 0 || index >= mValueCount || index != (int)value)
return "";
return mValues[index];
}
public String[] getValues()
{
return mValues;
}
public void setValues(String[] values)
{
if (values == null)
values = new String[] {};
this.mValues = values;
this.mValueCount = values.length;
}
}在您尝试显示条形图的方法中添加以下代码。
final String[] weekdays = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"}; // Your List / array with String Values For X-axis Labels
// Set the value formatter
XAxis xAxis = chart.getXAxis();
xAxis.setValueFormatter(new IndexAxisValueFormatter(weekdays));问题解决了！祝你编码愉快。
Stack Overflow用户
发布于 2019-02-25 16:12:34
这里是动态字符串标签(XAxis)的简单方法，
XAxis xAxis = lineChart.getXAxis();
xAxis.setPosition(XAxis.XAxisPosition.BOTTOM);
xAxis.setDrawGridLines(false);
xAxis.setValueFormatter(new IndexAxisValueFormatter(getAreaCount));
public ArrayList<String> getAreaCount() {
ArrayList<String> label = new ArrayList<>();
for (int i = 0; i < areaList.size(); i++)
label.add(areaList.get(i).getTopicName());
return label;
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/45320457
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