import com.github.mikephil.charting.formatter.DefaultAxisValueFormatter; //导入依赖的package包/类
protected void initializeChart() {
  Description description = new Description();
  description.setText("");
  messagesChart.setDescription(description);
  messagesChart.setNoDataText(getIdleText());
  messagesChart.setTouchEnabled(false);
  messagesChart.setDragEnabled(false);
  messagesChart.setPinchZoom(false);
  messagesChart.getLegend().setEnabled(false);
  messagesChart.getAxisLeft().setAxisMinimum(0);
  messagesChart.getAxisLeft().setGranularity(1f);
  messagesChart.getAxisRight().setEnabled(false);
  messagesChart.getXAxis().setAxisMinimum(0);
  messagesChart.getXAxis().setGranularity(1f);
  messagesChart.getXAxis().setPosition(XAxis.XAxisPosition.BOTTOM);
  messagesChart.getXAxis().setValueFormatter(new DefaultAxisValueFormatter(0));

  LineData data = new LineData();
  data.setValueTextColor(Color.WHITE);
  messagesChart.setData(data);
}
 

import com.github.mikephil.charting.formatter.DefaultAxisValueFormatter; //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(IAxisValueFormatter f) {

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

import com.github.mikephil.charting.formatter.DefaultAxisValueFormatter; //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;
}