Android MPAndroidChart xAxis.setValueFormatter throws ArrayIndexOutOfBoundsException - mpandroidchart

Question

Good morning,
I'm struggling with ArrayIndexOutOfBoundsException thrown when i'm inserting the row
xAxis.setValueFormatter(formatter) (commented in code).
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
bc = findViewById(R.id.chart);
CaricaStorico cs = new CaricaStorico();
try {
cs.execute().get();
} catch (ExecutionException e) {
throw new RuntimeException(e);
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
List<BarEntry> turno1 = new ArrayList<>();
List<BarEntry> turno2 = new ArrayList<>();
List<BarEntry> turno3 = new ArrayList<>();
String[] date = new String[100];
boolean datiturno1 = false;
boolean datiturno2 = false;
boolean datiturno3 = false;
for (int i = 0; i < storicoMacchina.size(); i++) {
Storico st = storicoMacchina.get(i);
System.out.println(st.getData() + " - " + st.getProduzione1() + " - " + st.getProduzione2() + " - " + st.getProduzione3());
turno1.add(new BarEntry(i, st.getProduzione1()));
turno2.add(new BarEntry(i, st.getProduzione2()));
turno3.add(new BarEntry(i, st.getProduzione3()));
if (st.getProduzione1() != 0) {
datiturno1 = true;
}
if (st.getProduzione2() != 0) {
datiturno2 = true;
}
if (st.getProduzione3() != 0) {
datiturno3 = true;
}
Calendar c = Calendar.getInstance();
c.setTime(st.getData());
String dataMese = c.get(Calendar.DAY_OF_MONTH) + "/" + (c.get(Calendar.MONTH) + 1);
xLabels.add(dataMese);
}
ValueFormatter formatter = new ValueFormatter() {
#Override
public String getAxisLabel(float value, AxisBase axis) {
return xLabels.get((int) value);
}
};
BarDataSet set1 = null;
BarDataSet set2 = null;
BarDataSet set3 = null;
set1 = new BarDataSet(turno1, "Turno 1");
set2 = new BarDataSet(turno2, "Turno 2");
set3 = new BarDataSet(turno3, "Turno 3");
System.out.println(datiturno1 + "," + datiturno2 + "," + datiturno3);
float groupSpace = 0.04f;
float barSpace = 0.02f;
float barWidth = 0.3f;
// set1.setColors(new int[] { R.color.red, R.color.red1, R.color.red2, R.color.red3 },MainActivity.this);
set1.setColor(getResources().getColor(R.color.turno1));
set2.setColor(getResources().getColor(R.color.turno2));
set3.setColor(getResources().getColor(R.color.turno3));
BarData barData;
if (datiturno3 == false) {
barData = new BarData(set1, set2);
groupSpace = 0.06f;
barSpace = 0.02f;
barWidth = 0.45f;
} else {
barData = new BarData(set1, set2, set3);
}
barData.setBarWidth(barWidth);
bc.setData(barData);
Description desc = new Description();
desc.setText("Produzione ultima settimana");
bc.setDescription(desc);
bc.groupBars(0, groupSpace, barSpace);
XAxis xAxis = bc.getXAxis();
xAxis.setCenterAxisLabels(true);
xAxis.setPosition(XAxis.XAxisPosition.BOTH_SIDED);
xAxis.setAxisMinimum(0f);
xAxis.setGranularity(1);
xAxis.setAxisMaximum(storicoMacchina.size());
// xAxis.setValueFormatter(formatter);
bc.invalidate();
}
without this line code is working fine except for the labels in xAxis that i'm trying to set with this line.
Anyone can help me to find what i'm doing wrong?
Thank you for your help
your text

Answer 1

I'have found workaround to solve my problem changing the code above with this
If anyone can explain me the reason value index differs from my xlabel, dataset size will be appreciated.
Thanks again
public String getAxisLabel(float value, AxisBase axis) {
String label = "";
if ((value >= 0) && (value <= xLabels.size() -1)) {
label = xLabels.get((int) value);
}
return label;
}