MPAndroidChart - 如何设置独立于图表数据的 x 轴标签

Question

Using MPAndroidCharts , imagine I have the following entries:

{x: 2, y: 3}, {x: 4, y: 4} and {x: 6, y: 10}

And I wanna show the following labels on the x axis:

{x: 1, label: "A"}, {x: 4, label: "B"}, {x: 7, label: "C"} and {x: 10, label: "D"}

How can I achieve this?

Answer 1

You could use a valueFormatter to change the Axis labels to what you want

XAxis xl = chart.getXAxis();
        // Make sure we get the values in the right places
        xl.setAxisMaximum(10f);
        xl.setAxisMinimum(0f);
        xl.setGranularity(1f);
        xl.setGranularityEnabled(true);
        // Create a formatter that returns the right string for each value
        xl.setValueFormatter(new ValueFormatter()
        {
            @Override
            public String getFormattedValue(float value) {
                String str="";
                if(value==1f)
                    str="A";
                else if(value==4f)
                    str="B";
                else if(value==7f)
                    str="C";
                else if(value==10f)
                    str="D";
                else
                    str="";
                return str;
            }
        });