import com.jjoe64.graphview.GraphViewDataInterface; //导入依赖的package包/类
public GraphViewDataInterface[] getDurationGraphViewData() {
    synchronized (lock) {
        int size = size();
        final GraphViewDataInterface[] data = new GraphViewDataInterface[size];
        for (int i = 0; i < size; ++i) {
            Surge surge = get((size - i) - 1);
            long time = surge.getStart().getTime();
            double duration = surge.getDurationSeconds();
            data[i] = new GraphView.GraphViewData(time, duration);
        }
        return data;
    }
}
 

import com.jjoe64.graphview.GraphViewDataInterface; //导入依赖的package包/类
public GraphViewDataInterface[] getFrequencyGraphViewData() {
    synchronized (lock) {
        int size = size();
        final GraphViewDataInterface[] data = new GraphViewDataInterface[size];
        for (int i = 0; i < size; ++i) {
            Surge surge = get((size - i) - 1);
            long time = surge.getStart().getTime();
            double frequency = -surge.getSecondsSincePrevious();
            data[i] = new GraphView.GraphViewData(time, frequency);
        }
        return data;
    }
}
 

import com.jjoe64.graphview.GraphViewDataInterface; //导入依赖的package包/类
@Override
public void drawSeries(Canvas canvas, GraphViewDataInterface[] values,
                       float graphwidth, float graphheight, float border, double minX,
                       double minY, double diffX, double diffY, float horstart,
                       GraphViewSeriesStyle style) {
    float colwidth = graphwidth / values.length;
    int maxColumnSize = getGraphViewStyle().getMaxColumnWidth();
    if (maxColumnSize > 0 && colwidth > maxColumnSize) {
      colwidth = maxColumnSize;
    }

    paint.setStrokeWidth(style.thickness);
    paint.setColor(style.color);

    // Bar chart position of this series on the canvas
    List<BarChartRect> barChartRects = new LinkedList<>();

    // draw data
    for (int i = 0; i < values.length; i++) {
        float valY = (float) (values[i].getY() - minY);
        float ratY = (float) (valY / diffY);
        float y = graphheight * ratY;

        // hook for value dependent color
        if (style.getValueDependentColor() != null) {
            paint.setColor(style.getValueDependentColor().get(values[i]));
        }

        float pad = style.padding;

        float left = (i * colwidth) + horstart;
        float top = (border - y) + graphheight;
        float right = left + colwidth;
        float bottom = graphheight + border - 1;

        // Draw the orange selection behind the selected bar
        if (mBarPositionToHighlight == i && style.outerhighlightColor != 0x00ffffff) {
            paint.setColor(style.outerhighlightColor);
            canvas.drawRect(left, 10f, right, bottom, paint);
        }

        if ((top - bottom) == 1) {
            // draw a placeholder
            if (mBarPositionToHighlight != i) {
                paint.setColor(style.color);
                paint.setAlpha(25);
                Shader shader = new LinearGradient(left + pad, bottom - 50, left + pad, bottom, Color.WHITE, Color.BLACK, Shader.TileMode.CLAMP);
                paint.setShader(shader);
                canvas.drawRect(left + pad, bottom - 50, right - pad, bottom, paint);
                paint.setShader(null);
            }
        } else {
            // draw a real bar
            paint.setAlpha(255);
            if (mBarPositionToHighlight == i) {
                paint.setColor(style.highlightColor);
            } else {
                paint.setColor(style.color);
            }
            canvas.drawRect(left + pad, top, right - pad, bottom, paint);
        }

        barChartRects.add(new BarChartRect(left + pad, top, right - pad, bottom));
    }
    mSeriesRectsDrawedOnScreen.add(barChartRects);
}
 

import com.jjoe64.graphview.GraphViewDataInterface; //导入依赖的package包/类
private GraphViewDataInterface[] getGraphViewData(SurgeCollection surges) {
    return isFrequency ? surges.getFrequencyGraphViewData() : surges.getDurationGraphViewData();
}