Mpandroidchart: The Y axis shows only the highest and lowest values （no setShowOnlyMinMax）

[q805699513]

The Y axis shows only the highest and lowest values，no setShowOnlyMinMax Method. How do I implement this?

[q805699513]

v3.0.2 no setShowOnlyMinMax Method

[mhanifsp]

You could implement a IAxisValueFormatter
and do something like this

@Override
    public String getFormattedValue(float value, AxisBase axis) {

        int firstNumber = SOME_NUMBER;
        int lastNumber = SOME_OTHER_NUMBER

        if(value==firstNumber || value == lastNumber)
            return String.valueOf(value);
        else
            return "";
    }
}

[q805699513]

I did it by other means

[oisx1]

you maybe like this

[q805699513]

@oisx1 Excellent

[oisx1]

你可以修改源码中CandleStickChartRender的DrawValues函数
`@Override
public void drawValues(Canvas c) {

    // if values are drawn
    //if (isDrawingValuesAllowed(mChart))
    {

        List<ICandleDataSet> dataSets = mChart.getCandleData().getDataSets();

        for (int i = 0; i < dataSets.size(); i++) {

            ICandleDataSet dataSet = dataSets.get(i);

            if (!shouldDrawValues(dataSet))
                continue;

            // apply the text-styling defined by the DataSet
            applyValueTextStyle(dataSet);

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

            mXBounds.set(mChart, dataSet);

            float[] positions = trans.generateTransformedValuesCandle(
                    dataSet, mAnimator.getPhaseX(), mAnimator.getPhaseY(), mXBounds.min, mXBounds.max);

            float yOffset = Utils.convertDpToPixel(5f);

            MPPointF iconsOffset = MPPointF.getInstance(dataSet.getIconsOffset());
            iconsOffset.x = Utils.convertDpToPixel(iconsOffset.x);
            iconsOffset.y = Utils.convertDpToPixel(iconsOffset.y);

            float maxY = 0, minY = Float.MAX_VALUE;
            for (int k = mXBounds.min; k < mXBounds.max; k++) {

                CandleEntry en = dataSet.getEntryForIndex(k);
                if (en == null)
                    continue;
                if (en.getHigh() > maxY)
                    maxY = en.getHigh();
                else if (en.getLow() < minY)
                    minY = en.getLow();
            }
            Log.i(Float.toString(maxY), Float.toString(minY));

            for (int j = 0; j < positions.length; j += 2) {

                float x = positions[j];
                float y = positions[j + 1];

                if (!mViewPortHandler.isInBoundsRight(x))
                    break;

                if (!mViewPortHandler.isInBoundsLeft(x) || !mViewPortHandler.isInBoundsY(y))
                    continue;

                CandleEntry entry = dataSet.getEntryForIndex(j / 2 + mXBounds.min);

                float high = entry.getHigh();
                float low = entry.getLow();
                if(high == maxY)
                {
                    drawValue(c, dataSet.getValueFormatter(), high, entry, i, x, y - yOffset, dataSet.getValueTextColor(j / 2));
                }
                if(low == minY)
                {
                    float[] matrix = new float[]{ 0, entry.getLow() * mAnimator.getPhaseY() };
                    trans.pointValuesToPixel(matrix);
                    drawValue(c, dataSet.getValueFormatter(), low, entry, i, x, matrix[1] + 2 * yOffset, dataSet.getValueTextColor(j / 2));
                }
                /*
                if (dataSet.isDrawValuesEnabled()) {
                    drawValue(c,
                            dataSet.getValueFormatter(),
                            entry.getHigh(),
                            entry,
                            i,
                            x,
                            y - yOffset,
                            dataSet
                                    .getValueTextColor(j / 2));
                }

                if (entry.getIcon() != null && dataSet.isDrawIconsEnabled()) {

                    Drawable icon = entry.getIcon();

                    Utils.drawImage(
                            c,
                            icon,
                            (int)(x + iconsOffset.x),
                            (int)(y + iconsOffset.y),
                            icon.getIntrinsicWidth(),
                            icon.getIntrinsicHeight());
                }*/
            }

            //MPPointF.recycleInstance(iconsOffset);
        }
    }
}`

[oisx1]

然后重载drawValue可以定制样式

[jahenryhan]

@oisx1 大神，mXBounds、MPPointF、shouldDrawValues是什么啊？
（What is mXBounds, MPPointF and shouldDrawValues?）