import com.github.mikephil.charting.formatter.IFillFormatter; //导入依赖的package包/类
private LineData getData(ArrayList<Entry> yVals) {
    LineDataSet set1 = new LineDataSet(yVals, "");
    set1.setLineWidth(1.45f);
    set1.setColor(Color.argb(240, 255, 255, 255));
    set1.setCircleColor(Color.WHITE);
    set1.setHighLightColor(Color.WHITE);
    set1.setFillColor(getResources().getColor(R.color.chartFilled));
    set1.setDrawCircles(false);
    set1.setDrawValues(false);
    set1.setDrawFilled(true);
    set1.setFillFormatter(new IFillFormatter() {
        @Override
        public float getFillLinePosition(ILineDataSet dataSet, LineDataProvider dataProvider) {
            return priceChart.getAxisLeft().getAxisMinimum();
        }
    });

    LineData data = new LineData(set1);
    return data;
}
 

import com.github.mikephil.charting.formatter.IFillFormatter; //导入依赖的package包/类
/**
 * Sets a custom IFillFormatter to the chart that handles the position of the
 * filled-line for each DataSet. Set this to null to use the default logic.
 *
 * @param formatter
 */
public void setFillFormatter(IFillFormatter formatter) {

    if (formatter == null)
        mFillFormatter = new DefaultFillFormatter();
    else
        mFillFormatter = formatter;
}
 

import com.github.mikephil.charting.formatter.IFillFormatter; //导入依赖的package包/类
private LineData buildEMULayers(float xmin, float xmax){
  LineData data = new LineData();
  WaterColumn column = mDataManager.getCurrentWaterColumn();

  if (column != null){
    Set<EMUObservation> observations = column.getEmuSet();
    for (final EMUObservation observation : observations){
      ArrayList<Entry> entries = new ArrayList<>();

      for (float index = xmin; index <= xmax; index++) {
        entries.add(new Entry(index, Math.abs(observation.getTop())));
      }
      Collections.sort(entries, new EntryXComparator());

      LineDataSet set = new LineDataSet(entries, "Line DataSet");
      set.setAxisDependency(YAxis.AxisDependency.LEFT);
      set.setFillColor(Color.parseColor(EmuHelper.getColorForEMUCluster(observation.getEmu().getName())));

      set.setFillAlpha(255);
      set.setDrawCircles(false);
      set.setDrawValues(false);
      set.setDrawFilled(true);
      set.setHighLightColor(Color.rgb(244, 117, 117));
      set.setDrawCircleHole(false);
      set.setFillFormatter(new IFillFormatter() {
        @Override
        public float getFillLinePosition(ILineDataSet dataSet, LineDataProvider dataProvider) {
          return Math.abs(observation.getTop()) + observation.getThickness();
        }
      });
      data.addDataSet(set);
    }
  }else{
    Log.e(TAG, "Water column data object is null!");
  }


  return data;
}
 

import com.github.mikephil.charting.formatter.IFillFormatter; //导入依赖的package包/类
/**
 * Sets a custom FillFormatter to the chart that handles the position of the
 * filled-line for each DataSet. Set this to null to use the default logic.
 *
 * @param formatter
 */
public void setFillFormatter(IFillFormatter formatter) {

    if (formatter == null)
        mFillFormatter = new DefaultFillFormatter();
    else
        mFillFormatter = formatter;
}
 

import com.github.mikephil.charting.formatter.IFillFormatter; //导入依赖的package包/类
@Override
public IFillFormatter getFillFormatter() {
    return mFillFormatter;
}
 

import com.github.mikephil.charting.formatter.IFillFormatter; //导入依赖的package包/类
private void setData(int count, float range) {

        ArrayList<Entry> yVals = new ArrayList<Entry>();

        for (int i = 0; i < count; i++) {
            float mult = (range + 1);
            float val = (float) (Math.random() * mult) + 20;// + (float)
                                                           // ((mult *
                                                           // 0.1) / 10);
            yVals.add(new Entry(i, val));
        }

        LineDataSet set1;

        if (mChart.getData() != null &&
                mChart.getData().getDataSetCount() > 0) {
            set1 = (LineDataSet)mChart.getData().getDataSetByIndex(0);
            set1.setValues(yVals);
            mChart.getData().notifyDataChanged();
            mChart.notifyDataSetChanged();
        } else {
            // create a dataset and give it a type
            set1 = new LineDataSet(yVals, "DataSet 1");

            set1.setMode(LineDataSet.Mode.CUBIC_BEZIER);
            set1.setCubicIntensity(0.2f);
            //set1.setDrawFilled(true);
            set1.setDrawCircles(false);
            set1.setLineWidth(1.8f);
            set1.setCircleRadius(4f);
            set1.setCircleColor(Color.WHITE);
            set1.setHighLightColor(Color.rgb(244, 117, 117));
            set1.setColor(Color.WHITE);
            set1.setFillColor(Color.WHITE);
            set1.setFillAlpha(100);
            set1.setDrawHorizontalHighlightIndicator(false);
            set1.setFillFormatter(new IFillFormatter() {
                @Override
                public float getFillLinePosition(ILineDataSet dataSet, LineDataProvider dataProvider) {
                    return -10;
                }
            });

            // create a data object with the datasets
            LineData data = new LineData(set1);
            data.setValueTypeface(mTfLight);
            data.setValueTextSize(9f);
            data.setDrawValues(false);

            // set data
            mChart.setData(data);
        }
    }
 

import com.github.mikephil.charting.formatter.IFillFormatter; //导入依赖的package包/类
/**
 * Returns the IFillFormatter that is set for this DataSet.
 *
 * @return
 */
IFillFormatter getFillFormatter();