如何在android graphview中将x轴上的字符串值映射为y轴上的字符串值

implementation 'com.jjoe64:graphview:4.2.2'

<com.jjoe64.graphview.GraphView
    android:id="@+id/graph"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

GraphView graphView = new GraphView(context);

LineGraphSeries<DataPoint> series = new LineGraphSeries<>(new DataPoint[] {
    new DataPoint(0, 1),
    new DataPoint(1, 5),
    new DataPoint(2, 3),
    new DataPoint(3, 2),
    new DataPoint(4, 6)
});

String[] xLabels = new String[] {"A", "B", "C", "D", "E"};
graphView.getGridLabelRenderer().setHorizontalLabels(xLabels);

graphView.addSeries(series);

GraphView graphView = findViewById(R.id.graph);

LineGraphSeries<DataPoint> series = new LineGraphSeries<>(new DataPoint[] {
    new DataPoint(0, 1),
    new DataPoint(1, 5),
    new DataPoint(2, 3),
    new DataPoint(3, 2),
    new DataPoint(4, 6)
});

String[] xLabels = new String[] {"A", "B", "C", "D", "E"};
graphView.getGridLabelRenderer().setHorizontalLabels(xLabels);

graphView.addSeries(series);