These two lines are causing the issue :
barChart.getXAxis().setAxisMinValue(10f);
barChart.groupBars(10, groupSpace, barSpace);
you are setting the minimum value of x axis to 10, whereas the labels will begin with index 0, So internally IndexOut of bound exception keeps occurring So,
Change To:
barChart.getXAxis().setAxisMinValue(0f); // Better remove setAxisMinValue(), as it deprecated
barChart.groupBars(0, groupSpace, barSpace);
If you still want to have 10 as the initial spacing, override IAxisValueFormatter (Not recommended)
barChart.getXAxis().setValueFormatter(new IndexAxisValueFormatter(formatter) {
@Override
public String getFormattedValue(float value) {
int x = (int)value / 10
if(x > = 0 && x < formatter.size())
return formatter.get(x);
else
return "";
}
});
As you have fixed group space, bar space and width. you will need to heavily customise for multiple dataset.
However I wouldn't go with your solution for such a dynamic graph,
I have re-written your solution to adapt to changing width. (This are the results)
Github Project Link
Apk Link
BarChart barChart;
ArrayList<IBarDataSet> dataSets = new ArrayList<>();
float defaultBarWidth = -1;
List<String> xAxisValues = new ArrayList<>(Arrays.asList("Jan", "Feb", "March", "April", "May", "June","July", "August", "September", "October", "November", "December"));
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
barChart = findViewById(R.id.barchart);
setChart(3);
RadioGroup radioGroup = findViewById(R.id.radio_group);
radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup radioGroup, int switchId) {
switch (switchId) {
case R.id.one_month:
setChart(1);
break;
case R.id.three_month:
setChart(3);
break;
case R.id.six_month:
setChart(6);
break;
case R.id.tweleve_month:
setChart(12);
break;
}
}
});
}
private void setChart(int size) {
List<BarEntry> incomeEntries = getIncomeEntries(size);
List<BarEntry> expenseEntries = getExpenseEntries(size);
dataSets = new ArrayList<>();
BarDataSet set1, set2;
set1 = new BarDataSet(incomeEntries, "Income");
set1.setColor(Color.rgb(65, 168, 121));
set1.setValueTextColor(Color.rgb(55, 70, 73));
set1.setValueTextSize(10f);
set2 = new BarDataSet(expenseEntries, "Expense");
set2.setColors(Color.rgb(241, 107, 72));
set2.setValueTextColor(Color.rgb(55, 70, 73));
set2.setValueTextSize(10f);
dataSets.add(set1);
dataSets.add(set2);
BarData data = new BarData(dataSets);
barChart.setData(data);
barChart.getAxisLeft().setAxisMinimum(0);
barChart.getDescription().setEnabled(false);
barChart.getAxisRight().setAxisMinimum(0);
barChart.setDrawBarShadow(false);
barChart.setDrawValueAboveBar(true);
barChart.setMaxVisibleValueCount(10);
barChart.setPinchZoom(false);
barChart.setDrawGridBackground(false);
Legend l = barChart.getLegend();
l.setWordWrapEnabled(true);
l.setTextSize(14);
l.setVerticalAlignment(Legend.LegendVerticalAlignment.TOP);
l.setHorizontalAlignment(Legend.LegendHorizontalAlignment.CENTER);
l.setOrientation(Legend.LegendOrientation.HORIZONTAL);
l.setDrawInside(false);
l.setForm(Legend.LegendForm.CIRCLE);
XAxis xAxis = barChart.getXAxis();
xAxis.setGranularity(1f);
xAxis.setCenterAxisLabels(true);
xAxis.setDrawGridLines(false);
xAxis.setLabelRotationAngle(-45);
xAxis.setPosition(XAxis.XAxisPosition.BOTTOM);
xAxis.setAxisMaximum(getExpenseEntries(size).size());
barChart.getXAxis().setValueFormatter(new IndexAxisValueFormatter(xAxisValues));
YAxis leftAxis = barChart.getAxisLeft();
leftAxis.removeAllLimitLines();
leftAxis.setTypeface(Typeface.DEFAULT);
leftAxis.setPosition(YAxis.YAxisLabelPosition.OUTSIDE_CHART);
leftAxis.setTextColor(Color.BLACK);
leftAxis.setDrawGridLines(false);
barChart.getAxisRight().setEnabled(false);
setBarWidth(data, size);
barChart.invalidate();
}
private void setBarWidth(BarData barData, int size) {
if (dataSets.size() > 1) {
float barSpace = 0.02f;
float groupSpace = 0.3f;
defaultBarWidth = (1 - groupSpace) / dataSets.size() - barSpace;
if (defaultBarWidth >= 0) {
barData.setBarWidth(defaultBarWidth);
} else {
Toast.makeText(getApplicationContext(), "Default Barwdith " + defaultBarWidth, Toast.LENGTH_SHORT).show();
}
int groupCount = getExpenseEntries(size).size();
if (groupCount != -1) {
barChart.getXAxis().setAxisMinimum(0);
barChart.getXAxis().setAxisMaximum(0 + barChart.getBarData().getGroupWidth(groupSpace, barSpace) * groupCount);
barChart.getXAxis().setCenterAxisLabels(true);
} else {
Toast.makeText(getApplicationContext(), "no of bar groups is " + groupCount, Toast.LENGTH_SHORT).show();
}
barChart.groupBars(0, groupSpace, barSpace); // perform the "explicit" grouping
barChart.invalidate();
}
}
private List<BarEntry> getExpenseEntries(int size) {
ArrayList<BarEntry> expenseEntries = new ArrayList<>();
expenseEntries.add(new BarEntry(1,1710));
expenseEntries.add(new BarEntry(2,2480));
expenseEntries.add(new BarEntry(3,242));
expenseEntries.add(new BarEntry(4,2409));
expenseEntries.add(new BarEntry(5,8100));
expenseEntries.add(new BarEntry(6,1200));
expenseEntries.add(new BarEntry(7,6570));
expenseEntries.add(new BarEntry(8,5455));
expenseEntries.add(new BarEntry(9,15000));
expenseEntries.add(new BarEntry(10,11340));
expenseEntries.add(new BarEntry(11,9100));
expenseEntries.add(new BarEntry(12,6300));
return expenseEntries.subList(0, size);
}
private List<BarEntry> getIncomeEntries(int size) {
ArrayList<BarEntry> incomeEntries = new ArrayList<>();
incomeEntries.add(new BarEntry(1, 11300));
incomeEntries.add(new BarEntry(2, 1390));
incomeEntries.add(new BarEntry(3, 1190));
incomeEntries.add(new BarEntry(4, 7200));
incomeEntries.add(new BarEntry(5, 4790));
incomeEntries.add(new BarEntry(6, 4500));
incomeEntries.add(new BarEntry(7, 8000));
incomeEntries.add(new BarEntry(8, 7034));
incomeEntries.add(new BarEntry(9, 4307));
incomeEntries.add(new BarEntry(10, 8762));
incomeEntries.add(new BarEntry(11, 4355));
incomeEntries.add(new BarEntry(12, 6000));
return incomeEntries.subList(0, size);
}
Note that the setBarWidth() function is the most important and plays the role of adjusting the width and size of graph bar.
