MPAndroidChart-堆积条上的圆角

Question

我需要创建带有堆叠条形图的图表，并且条形图需要四舍五入。到目前为止，我已经成功地将这些条弄成圆形，但是如果它们没有堆叠的话。如果堆叠在一起，则每个条都将取整，这是我不需要的。无论是否堆叠，我都需要将圆角取整。

这是它的外观：

这是目前的样子：

我已经制作了自定义渲染器并覆盖了drawDataSet方法，但是无论堆栈如何，我都无法弄清楚如何舍弃顶部和底部。

 @Override
protected void drawDataSet(Canvas c, IBarDataSet dataSet, int index) {

    Transformer trans = mChart.getTransformer(dataSet.getAxisDependency());

    mShadowPaint.setColor(dataSet.getBarShadowColor());

    float phaseX = mAnimator.getPhaseX();
    float phaseY = mAnimator.getPhaseY();


    // initialize the buffer
    BarBuffer buffer = mBarBuffers[index];
    buffer.setPhases(phaseX, phaseY);
    buffer.setDataSet(index);
    buffer.setBarWidth(mChart.getBarData().getBarWidth());
    buffer.setInverted(mChart.isInverted(dataSet.getAxisDependency()));

    buffer.feed(dataSet);

    trans.pointValuesToPixel(buffer.buffer);

    // if multiple colors
    if (dataSet.getColors().size() > 1) {

        for (int j = 0; j < buffer.size(); j += 4) {

            if (!mViewPortHandler.isInBoundsLeft(buffer.buffer[j + 2]))
                continue;

            if (!mViewPortHandler.isInBoundsRight(buffer.buffer[j]))
                break;

            if (mChart.isDrawBarShadowEnabled()) {
                if (mRadius > 0)
                    c.drawRoundRect(new RectF(buffer.buffer[j], mViewPortHandler.contentTop(),
                            buffer.buffer[j + 2],
                            mViewPortHandler.contentBottom()), mRadius, mRadius, mShadowPaint);
                else
                    c.drawRect(buffer.buffer[j], mViewPortHandler.contentTop(),
                            buffer.buffer[j + 2],
                            mViewPortHandler.contentBottom(), mShadowPaint);
            }

            // Set the color for the currently drawn value. If the index
            // is
            // out of bounds, reuse colors.
            int size = dataSet.getStackSize();
            mRenderPaint.setColor(dataSet.getColor(j / 4));
            if (mRadius > 0) {
                RectF customRect = new RectF(buffer.buffer[j], buffer.buffer[j + 1], buffer.buffer[j + 2],
                        buffer.buffer[j + 3]);
                Path path = roundRect(customRect, 25f, 25f, true, true, false, false);
                c.drawPath(path, mRenderPaint);
            } else
                c.drawRect(buffer.buffer[j], buffer.buffer[j + 1], buffer.buffer[j + 2],
                        buffer.buffer[j + 3], mRenderPaint);
        }
    } else {

        mRenderPaint.setColor(dataSet.getColor());

        for (int j = 0; j < buffer.size(); j += 4) {

            if (!mViewPortHandler.isInBoundsLeft(buffer.buffer[j + 2]))
                continue;

            if (!mViewPortHandler.isInBoundsRight(buffer.buffer[j]))
                break;

            if (mChart.isDrawBarShadowEnabled()) {
                if (mRadius > 0)
                    c.drawRoundRect(new RectF(buffer.buffer[j], mViewPortHandler.contentTop(),
                            buffer.buffer[j + 2],
                            mViewPortHandler.contentBottom()), mRadius, mRadius, mShadowPaint);
                else
                    c.drawRect(buffer.buffer[j], buffer.buffer[j + 1], buffer.buffer[j + 2],
                            buffer.buffer[j + 3], mRenderPaint);
            }

            if (mRadius > 0)
                c.drawRoundRect(new RectF(buffer.buffer[j], buffer.buffer[j + 1], buffer.buffer[j + 2],
                        buffer.buffer[j + 3]), mRadius, mRadius, mRenderPaint);
            else
                c.drawRect(buffer.buffer[j], buffer.buffer[j + 1], buffer.buffer[j + 2],
                        buffer.buffer[j + 3], mRenderPaint);
        }
    }
}