如何在图形（库GraphView）中突出显示（选择）区域

Question

我使用GraphView库构建图形（.txt文件中有许多用于ECG模型构建的数字）。我有下一个问题。我需要在图形中突出显示该区域。例如，如果Y> 500，则我们突出显示该区域，但不小于500。这是我的代码。我会很高兴为您提供任何帮助。

P.S。对不起，这个巨大的代码

try {

            DataInputStream text = new DataInputStream(getAssets().open(String.format("Ekg1.txt")));
            Scanner scan = new Scanner(text);

            String line;
            int all = 0;


            while (scan.hasNextLine()) {
                int[] arr = new int[12];
                all++;
                line = scan.nextLine();
                if (!(line.length() == 0 || (line.charAt(0) == ';'))) { // если строка пустая или первое значение ;
                    line = scan.nextLine().replaceAll(",", "").replaceAll(";", "");
                    for (int i = 0; i < 12; i++) {
                        arr[i] = Integer.parseInt(line.split(" ")[i].trim());
                    }
                    list.add(arr);
                    count++; //определяем сколько символов в list[i]
                }
                if (count >= 1000) { // сдесь ставим значение до которого надо кастрировать файл
                    break;
                }
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        int[] col1 = new int[count];
        int[] col2 = new int[count];
        int[] col3 = new int[count];
        int[] col4 = new int[count];
        int[] col5 = new int[count];
        int[] col6 = new int[count];
        int[] col7 = new int[count];
        int[] col8 = new int[count];
        int[] col9 = new int[count];
        int[] col10 = new int[count];
        int[] col11 = new int[count];
        int[] col12 = new int[count];

        for (int i = 0; i < list.size(); i++) {
            col1[i] = list.get(i)[0];
            col2[i] = list.get(i)[1];
            col3[i] = list.get(i)[2];
            col4[i] = list.get(i)[3];
            col5[i] = list.get(i)[4];
            col6[i] = list.get(i)[5];
            col7[i] = list.get(i)[6];
            col8[i] = list.get(i)[7];
            col9[i] = list.get(i)[8];
            col10[i] = list.get(i)[9];
            col11[i] = list.get(i)[10];
            col12[i] = list.get(i)[11];

        }


        double x;
        int y;
        x = 0;
        GraphView graph = (GraphView) findViewById(R.id.graph);
        series = new LineGraphSeries<DataPoint>();
        for (int i = 0; i < count; i++) {
            x = x + 0.001;
            y = col1[i];
            series.appendData(new DataPoint(x, y), true, 40000);
        }

        for (int i = 0; i < count; i++) {
            x = x + 0.001;
            y = col2[i];
            series.appendData(new DataPoint(x, y), true, 40000);
        }

        for (int i = 0; i < count; i++) {
            x = x + 0.001;
            y = col3[i];
            series.appendData(new DataPoint(x, y), true, 40000);
        }


        for (int i = 0; i < count; i++) {
            x = x + 0.001;
            y = col4[i];
            series.appendData(new DataPoint(x, y), true, 40000);
        }

        for (int i = 0; i < count; i++) {
            x = x + 0.001;
            y = col4[i];
            series.appendData(new DataPoint(x, y), true, 40000);
        }


        for (int i = 0; i < count; i++) {
            x = x + 0.001;
            y = col5[i];
            series.appendData(new DataPoint(x, y), true, 40000);
        }


        for (int i = 0; i < count; i++) {
            x = x + 0.001;
            y = col6[i];
            series.appendData(new DataPoint(x, y), true, 40000);
        }

        for (int i = 0; i < count; i++) {
            x = x + 0.001;
            y = col7[i];
            series.appendData(new DataPoint(x, y), true, 40000);
        }

        for (int i = 0; i < count; i++) {
            x = x + 0.001;
            y = col8[i];
            series.appendData(new DataPoint(x, y), true, 40000);
        }


        for (int i = 0; i < count; i++) {
            x = x + 0.001;
            y = col9[i];
            series.appendData(new DataPoint(x, y), true, 40000);
        }


        for (int i = 0; i < count; i++) {
            x = x + 0.001;
            y = col10[i];
            series.appendData(new DataPoint(x, y), true, 40000);
        }


        for (int i = 0; i < count; i++) {
            x = x + 0.001;
            y = col11[i];
            series.appendData(new DataPoint(x, y), true, 40000);
        }

        for (int i = 0; i < count; i++) {
            x = x + 0.001;
            y = col12[i];
            series.appendData(new DataPoint(x, y), true, 40000);
        }
        graph.addSeries(series);