How to set datapoint label with string value

[stephendaniel]

Hi, is it possible to set the datapoint label with string value? I tried to set it with string but error.

[EbrahimElsify]

eduGrades = new String[5];
behGrades = new String[5];

    eduGrades[0] = getString(R.string.fail);
    eduGrades[1] = getString(R.string.pass);
    eduGrades[2] = getString(R.string.good);
    eduGrades[3] = getString(R.string.very_good);
    eduGrades[4] = getString(R.string.excellent);

    behGrades[0] = getString(R.string.baad);
    behGrades[1] = getString(R.string.accepted);
    behGrades[2] =  getString(R.string.good);
    behGrades[3] =  getString(R.string.very_good);
    behGrades[4] =  getString(R.string.excellent);

DataPoint[] eduDp = new DataPoint[results.size()];
DataPoint[] behDp = new DataPoint[results.size()];

            dates = new String[results.size()];

            for (int i = 0; i < results.size(); i++) {

                dates[i] = results.get(i).getDateOfNote();

                eduDp[i] = new DataPoint(i, (double) results.get(i).getEducationEvaluationSign());
                behDp[i] = new DataPoint(i, (double) results.get(i).getBehaviorEvaluationSign());

            }

            LineGraphSeries<DataPoint> eduSeries = new LineGraphSeries<>(eduDp);
            educationalGraphView.addSeries(eduSeries);
            eduSeries.setDrawBackground(true);
            eduSeries.setColor(getResources().getColor(R.color.blue));
            eduSeries.setBackgroundColor(getResources().getColor(R.color.blue));
            StaticLabelsFormatter staticLabelsFormatter;
            staticLabelsFormatter = new StaticLabelsFormatter(educationalGraphView);
            staticLabelsFormatter.setVerticalLabels(eduGrades);
            staticLabelsFormatter.setHorizontalLabels(dates);

            educationalGraphView.getGridLabelRenderer().setHorizontalLabelsColor(getResources().getColor(R.color.colorPrimaryDark));
            educationalGraphView.getGridLabelRenderer().setVerticalLabelsColor(getResources().getColor(R.color.colorPrimaryDark));
            educationalGraphView.getGridLabelRenderer().setGridColor(getResources().getColor(R.color.white));
            educationalGraphView.getGridLabelRenderer().setHorizontalLabelsAngle(145);
            educationalGraphView.getGridLabelRenderer().setTextSize(23f);
            educationalGraphView.getGridLabelRenderer().setLabelsSpace(20);
            educationalGraphView.getGridLabelRenderer().setLabelFormatter(staticLabelsFormatter);