Java MP androidchart bar chart – how to group bars at random X-axis intervals between groups?

I want to make a bar chart in which three different data sets are combined at each data point, as shown below:

However, I can't use the groupbars method provided by the library to group these bars together, because no matter what x value I set for the items, it will group them according to the interval I specify in its parameters

For example, if I generate a dataset with an entry x value of {0,5,13,17... 50} and call 'groupbars', all my entries will be collected with an x value, as shown below:

What I want is a bar chart that groups each group. Each bar chart is visible at its specified x value. If I only delete the groupbars call, I will get information similar to what I want, but because the bar charts overlap, they will not be exactly the same, as shown below:

How to obtain results similar to the above images, but the bars of each dataset are completely visible? This is the code I use to generate datasets and group bars:

        ArrayList<BarEntry> happinessValues = new ArrayList<>();
        ArrayList<BarEntry> stressValues = new ArrayList<>();
        ArrayList<BarEntry> painValues = new ArrayList<>();

        for (int i = 0; i < 50; ++i) {
            happinessValues.add(new BarEntry(
                    i,
                    datapoint.getHappiness()));
            stressValues.add(new BarEntry(
                    i,
                    datapoint.getStress()));
            painValues.add(new BarEntry(
                    i,
                    datapoint.getPain()));
        }

        HappinessDataset happyDataset;

        BarDataSet stressDataset, painDataset;

            happyDataset = new HappinessDataset(happinessValues, "Happiness");

            stressDataset = new BarDataSet(stressValues, "Stress");

            painDataset = new BarDataSet(painValues, "Pain");

            BarData data = new BarData(happyDataset, stressDataset, painDataset);

            mChart.setData(data);

        mChart.getXAxis().setAxisMinimum(0);
        mChart.getXAxis().setAxisMaximum(50);


      float groupSpace = 0.4f;
        float barSpace = 0f; // x3 DataSet
        float barWidth = 0.2f; // x3 DataSet
        // (0.2 + 0) * 3 + 0.4 = 1.00 -> interval per "group"
        mChart.groupBars(startTime, groupSpace, barSpace);

resolvent:

I have solved this problem by modifying the x value and width of each bar entry

I create a new bardata class with three datasets and set the bar width (we call it bar_width) to 0.2 (that is, the three bar spaces account for 0.6 units in total and the spacing after the dataset is 0.4 units)

For any given bar input, I place the first bar at the desired x value (I for short) and the second bar at the x value I bar_ At width, place the third bar at I 2 * bar_ At width, the result is a set of 3 bar entries centered on any x value I want, as follows:

Therefore, in my above code, modify the bar entry creation code as follows:

final float BAR_WIDTH = 0.2f;

     happinessValues.add(new BarEntry(
                        i,
                        datapoint.getHappiness()));
                stressValues.add(new BarEntry(
                        i + BAR_WIDTH,
                        datapoint.getStress()));
                painValues.add(new BarEntry(
                        i + 2 * BAR_WIDTH,
                        datapoint.getPain()));

mChart.getBarData().setBarWidth(BAR_WIDTH);