import com.github.mikephil.charting.formatter.AxisValueFormatter; //导入依赖的package包/类
@SuppressWarnings("deprecation")
private void chartXAxisStyling(XAxis xAxis) {
    xAxis.setPosition(XAxis.XAxisPosition.TOP);
    xAxis.setTextColor(getResources().getColor(R.color.traffic_chart_text_color_light));
    xAxis.setDrawAxisLine(true);
    xAxis.setDrawGridLines(false);
    xAxis.setCenterAxisLabels(true);
    xAxis.setValueFormatter(new AxisValueFormatter() {
        @Override
        public String getFormattedValue(float value, AxisBase axis) {
            return Utils.humanReadable((long) value);
        }

        @Override
        public int getDecimalDigits() {
            return 0;
        }
    });
}
 

import com.github.mikephil.charting.formatter.AxisValueFormatter; //导入依赖的package包/类
PFAMarkerView(Context context, AxisValueFormatter xValueFormatter, int valuesSelectedItemPos, NumberScale numberScale)
{
    super(context, R.layout.statistics_marker_view);

    this.xValueFormatter = xValueFormatter;
    this.context = context;
    markup = (TextView) findViewById(R.id.textview_chart_markup);

    String numberFormat;
    if ( valuesSelectedItemPos == StatisticsQuery.PRICE )
    {
        numberFormat = context.getResources().getString(R.string.number_format_2_decimals);
        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
        String defaultCurrency = context.getResources().getString(R.string.currency);
        this.unit = prefs.getString(SettingsKeys.CURRENCY, defaultCurrency);
    }
    else
    {
        numberFormat = context.getResources().getString(R.string.number_format_0_decimals);
        this.unit = context.getResources().getString(R.string.statistics_quantity_unit);
    }

    this.context = context;
    this.numberScale = numberScale;
    this.format = new DecimalFormat(numberFormat);
}
 

import com.github.mikephil.charting.formatter.AxisValueFormatter; //导入依赖的package包/类
/**
 * Sets the formatter to be used for formatting the axis labels. If no formatter is set, the
 * chart will
 * automatically determine a reasonable formatting (concerning decimals) for all the values
 * that are drawn inside
 * the chart. Use chart.getDefaultValueFormatter() to use the formatter calculated by the chart.
 *
 * @param f
 */
public void setValueFormatter(AxisValueFormatter f) {

    if (f == null)
        mAxisValueFormatter = new DefaultAxisValueFormatter(mDecimals);
    else
        mAxisValueFormatter = f;
}