MultiLevelCategoriesActivity.java

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_chart_common);

        AnyChartView anyChartView = findViewById(R.id.any_chart_view);

        Cartesian cartesian = AnyChart.column();

        List<DataEntry> data = new ArrayList<>();
        data.add(new CustomDataEntry("Accelerate", "Onsite", 18, "NaN", "NaN"));
        data.add(new CustomDataEntry("CIS Renew", "Offshore", 6, "NaN", 2));
        data.add(new CustomDataEntry("CIS Renew", "Onsite", 7, 1, 4));
        data.add(new CustomDataEntry("CIS Others", "Offshore", "NaN", "NaN", 1));
        data.add(new CustomDataEntry("CIS Others", "Onsite", 2, 1, 1));

        preprocessData(data);

        Set set = Set.instantiate();
        set.data(data);

        cartesian.labels("{position:'center', fontColor:'#000'}");

        cartesian.column(set.mapAs("{'value': 'value2'}"));
        cartesian.column(set.mapAs("{'value': 'value3'}"));
        cartesian.column(set.mapAs("{'value': 'value4'}"));

        cartesian.yScale().stackMode("value");

        Ordinal ordinal = (Ordinal) cartesian.xScale(Ordinal.class);
        ordinal.names("subcategory");

        List<Double> weights = new ArrayList<>();
        double padding = 0.1d;
        List<String> names = new ArrayList<>();
        for (DataEntry dataEntry : data) {
            names.add((String) dataEntry.getValue("category"));
            weights.add((dataEntry.getValue("subcategory") == null) ? padding : 1 );
        }

        List<String> ticks = new ArrayList<>();
        ticks.add("1");
        for (int i = 1; i < names.size(); i++) {
            if (!names.get(i - 1).equals(names.get(i))) 					{
                ticks.add(String.valueOf(i));
            }
        }

        List<String> values = new ArrayList<>();
        for (int i = 0; i < names.size(); i++) {
            values.add(String.valueOf(i));
        }

        Ordinal customScale = Ordinal.instantiate();
        customScale.values(values.toArray(new String[values.size()]), "");
        customScale.names(names.toArray(new String[names.size()]));
        customScale.weights(weights.toArray(new Double[weights.size()]));
        ((Ordinal) cartesian.xScale(Ordinal.class)).weights(weights.toArray(new Double[weights.size()]));

        customScale.ticks(ticks.toArray(new String[ticks.size()]));

        cartesian.xAxis(0).ticks(false);

        cartesian.xAxis(1)
                .scale(customScale)
                .stroke("none")
                .ticks(false);

        Linear additionalXaxis = cartesian.xAxis(2);
        additionalXaxis.scale(customScale);
        additionalXaxis.labels(false);
        additionalXaxis.stroke("none");
        additionalXaxis.ticks()
                .length(-46)
                .position("outside");

        anyChartView.setChart(cartesian);
    }

    private void preprocessData(List<DataEntry> data) {
        data.add(0, new CustomDataEntry((String) data.get(0).getValue("category")));
        data.add(new CustomDataEntry((String) data.get(data.size()-1).getValue("category")));
        for (int i = 2; i < data.size() - 2; i++) {
            String previous = (String) data.get(i-1).getValue("category");
            String current = (String) data.get(i).getValue("category");
            if (!current.equals(previous)) {
                data.add(i, new CustomDataEntry(previous));
                data.add(i+1, new CustomDataEntry(current));
                i += 2;
            }
        }
    }

    class CustomDataEntry extends DataEntry {
        public CustomDataEntry(String category) {
            setValue("category", category);
        }

        public CustomDataEntry(String category, String subCategory, Integer value2, Integer value3, Integer value4) {
            setValue("category", category);
            setValue("subcategory", subCategory);
            setValue("value2", value2);
            setValue("value3", value3);
            setValue("value4", value4);
        }

        public CustomDataEntry(String category, String subCategory, String value2, Integer value3, Integer value4) {
            setValue("category", category);
            setValue("subcategory", subCategory);
            setValue("value2", value2);
            setValue("value3", value3);
            setValue("value4", value4);
        }

        public CustomDataEntry(String category, String subCategory, String value2, String value3, Integer value4) {
            setValue("category", category);
            setValue("subcategory", subCategory);
            setValue("value2", value2);
            setValue("value3", value3);
            setValue("value4", value4);
        }

        public CustomDataEntry(String category, String subCategory, String value2, Integer value3, String value4) {
            setValue("category", category);
            setValue("subcategory", subCategory);
            setValue("value2", value2);
            setValue("value3", value3);
            setValue("value4", value4);
        }

        public CustomDataEntry(String category, String subCategory, Integer value2, String value3, Integer value4) {
            setValue("category", category);
            setValue("subcategory", subCategory);
            setValue("value2", value2);
            setValue("value3", value3);
            setValue("value4", value4);
        }

        public CustomDataEntry(String category, String subCategory, Integer value2, String value3, String value4) {
            setValue("category", category);
            setValue("subcategory", subCategory);
            setValue("value2", value2);
            setValue("value3", value3);
            setValue("value4", value4);
        }
    }