private <T extends BarEntry> void drawLineChartWithoutPoint(Canvas canvas, RecyclerView parent, YAxis mYAxis) {
  final float parentRightBoard = parent.getWidth() - parent.getPaddingRight();
  final float parentLeft = parent.getPaddingLeft();
  BaseBarChartAdapter adapter = (BaseBarChartAdapter) parent.getAdapter();
  List<T> entryList = adapter.getEntries();
  final int childCount = parent.getChildCount();

  int adapterPosition;
  for (int i = 0; i < childCount; i++) {
    View child = parent.getChildAt(i);
    T barEntry = (T) child.getTag();
    if (barEntry.getY() == 0) {
      continue;
    }
    adapterPosition = parent.getChildAdapterPosition(child);
    RectF rectF = ChartComputeUtil.getBarChartRectF(child, parent,
                                                    mYAxis, mLineChartAttrs, barEntry);
    PointF pointF2 = new PointF((rectF.left + rectF.right) / 2, rectF.top);
          // 這里還有好多繪制邏輯代碼
            }//end for        
}// end  drawLineChartWithoutPoint

if (i < childCount - 1) {//這里的LayoutManager設(shè)置的reverse倒敘，所以i+1在i的左邊i對(duì)應(yīng)的是pointF2
  View pointF1Child = parent.getChildAt(i + 1);
  T barEntryLeft = (T) pointF1Child.getTag();
  //這里的RectF跟之前的Barchart類似，為ItemView中除去space后所占的RectF區(qū)域，其中pointF1的X為RectF的X軸方向的中心。
  RectF rectFLeft = ChartComputeUtil.getBarChartRectF(pointF1Child, parent, mYAxis,   mLineChartAttrs, barEntryLeft);
  //找到PointF1
  PointF pointF1 = new PointF((rectFLeft.left + rectFLeft.right) / 2, rectFLeft.top);
  //parentLeft為左邊界， parentRightBoard 為Chart的右邊界
  if (pointF1.x >= parentLeft && pointF2.x <= parentRightBoard) {
    float[] pointsOut = new float[]{pointF1.x, pointF1.y, pointF2.x, pointF2.y};
    drawChartLine(canvas, pointsOut);//繪制正常情況下的Line。
    drawFill(parent, mLineChartAttrs, canvas, pointF1, pointF2, rectF.bottom);
    //其它邊界繪制邏輯。 
}//end if

if (pointF1Child.getLeft() < parentLeft) {//左邊界，處理pointF1值顯示出來(lái)了的情況。
  if (adapterPosition + 2 < entryList.size()) {
  float x = pointF1.x - pointF1Child.getWidth();
  T barEntry0 = entryList.get(adapterPosition + 2);
  float y = ChartComputeUtil.getYPosition(barEntry0, parent, mYAxis, mLineChartAttrs);
  PointF pointF0 = new PointF(x, y);
    //PointF0、PointF1 跟Chart的交點(diǎn)pointFIntercept
  PointF pointFIntercept = ChartComputeUtil.getInterceptPointF(pointF0, pointF1, parentLeft);
  float[] points = new float[]{pointFIntercept.x, pointFIntercept.y, pointF1.x, pointF1.y};
  drawChartLine(canvas, points);
  drawFill(parent, mLineChartAttrs, canvas, pointFIntercept, pointF1, rectF.bottom);
   }
}

if (pointF1.x < parentLeft && pointF1Child.getRight() >= parentLeft) {//左邊界，處理pointF1值沒(méi)有顯示出來(lái)
  PointF pointF = ChartComputeUtil.getInterceptPointF(pointF1, pointF2, parentLeft);
  float[] points = new float[]{pointF.x, pointF.y, pointF2.x, pointF2.y};
  drawChartLine(canvas, points);
  drawFill(parent, mLineChartAttrs, canvas, pointF, pointF2, rectF.bottom);
}

if (pointF3.x < parentRightBoard) {//pointF3 在界內(nèi)。
  if (adapterPosition - 2 > 0) {
  float xInner = pointF3.x + child.getWidth();
  T barEntry4 = entryList.get(adapterPosition - 2);
  float yInner = ChartComputeUtil.getYPosition(barEntry4, parent, mYAxis, mLineChartAttrs);
  PointF pointF4 = new PointF(xInner, yInner);//找到PointF4.
  PointF pointFInterceptInner = ChartComputeUtil.getInterceptPointF(pointF3, pointF4, parentRightBoard);
  float[] pointsInner = new float[]{pointF3.x, pointF3.y, pointFInterceptInner.x, pointFInterceptInner.y};
  drawChartLine(canvas, pointsInner);
  drawFill(parent, mLineChartAttrs, canvas, pointF3, pointFInterceptInner, rectF.bottom);
  }
}

if (pointF3.x > parentRightBoard) {//在Chart之外。
  PointF pointFIntercept = ChartComputeUtil.getInterceptPointF(pointF2, pointF3, parentRightBoard);
  float[] points = new float[]{pointF2.x, pointF2.y, pointFIntercept.x, pointFIntercept.y};
  drawChartLine(canvas, points);
  drawFill(parent, mLineChartAttrs, canvas, pointFIntercept, pointF2, rectF.bottom);
} 

public static PointF getInterceptPointF(PointF pointF1, PointF pointF2, float x) {
    float width = Math.abs(pointF1.x - pointF2.x);
    float height = Math.abs(pointF1.y - pointF2.y);
    float interceptWidth = Math.abs(pointF1.x - x);
    float interceptHeight = interceptWidth * 1.0f / width * height;
    float y;
    if (pointF2.y < pointF1.y) {
      y = pointF1.y - interceptHeight;
    } else {
      y = pointF1.y + interceptHeight;
    }
    return new PointF(x, y);
}

private void drawFill(RecyclerView parent, LineChartAttrs mBarChartAttrs, Canvas canvas, PointF pointF, PointF pointF1, float bottom) {
        if (mBarChartAttrs.enableLineFill) {
            float yBottom = parent.getBottom() - parent.getPaddingBottom();
            float yTop = parent.getTop() + parent.getPaddingTop();
            LinearGradient mLinearGradient = new LinearGradient(
                    0,
                    yBottom,
                    0,
                    yTop,
                    new int[]{
                            mBarChartAttrs.lineShaderBeginColor, mBarChartAttrs.lineShaderEndColor},
                    null,
                    Shader.TileMode.CLAMP
            );
            mLineFillPaint.setShader(mLinearGradient);
            Path path = ChartComputeUtil.createColorRectPath(pointF, pointF1, bottom);
            LineChartDrawable drawable = new LineChartDrawable(mLineFillPaint, path);
            drawable.draw(canvas);
        }
    }