StatisticsActivity.java

    private void createDinnerBarChart() {
        dbHelper = new CoNaObiadDbHelper(this);
        DinnerContract dinnerContract = new DinnerContract();

        LinkedHashMap<String, Long> mealData = dinnerContract.getDinnerStatistics(dbHelper);
        List<BarEntry> entries = new ArrayList<>();

        int i = 0;
        for (Map.Entry<String, Long> entry : mealData.entrySet()) {
            String mealName = entry.getKey();
            Long quantity = entry.getValue();
            entries.add(new BarEntry(i, quantity, mealName));
            i++;
        }

        final BarDataSet set = new BarDataSet(entries, "");
        BarData data = new BarData(set);
        data.setBarWidth(0.2f);

        HorizontalBarChart chart = (HorizontalBarChart) findViewById(R.id.chart);
        chart.getLegend().setEnabled(false);
        chart.getDescription().setEnabled(false);

        XAxis xAxis = chart.getXAxis();
        xAxis.setPosition(XAxis.XAxisPosition.BOTTOM);
        xAxis.setGranularity(1f);
        xAxis.setLabelCount(i);
        xAxis.setDrawGridLines(false);
        xAxis.setValueFormatter(new IAxisValueFormatter() {
            @Override
            public String getFormattedValue(float value, AxisBase axis) {
                return (String) set.getEntryForXValue(value, 0.1f).getData();
            }
        });

        YAxis yAxis = chart.getAxisLeft();
        yAxis.setGranularity(0.5f);

        chart.getAxisRight().setDrawLabels(false);
        chart.getAxisRight().setDrawGridLines(false);
        chart.setData(data);
        chart.setVisibleXRange(0,i);
    }