在下图中,我绘制了一天的价格和每小时的交易量。

为了达到这个目的我用

CombinedChart

键入。您可以立即看到,数量数据分散了用户对价格数据的注意力,因为两个图表都填满了屏幕。

问题:

有没有办法保留图表底部25%的成交量和顶部75%的价格?

代码如下:

private void setupChart(){

chart.setAutoScaleMinMaxEnabled(true);

chart.setBackgroundColor(Color.WHITE);

chart.getDescription().setEnabled(false);

chart.setPinchZoom(false);

chart.setDrawGridBackground(false);

chart.getLegend().setEnabled(true);

chart.setDrawOrder(new CombinedChart.DrawOrder[]{ CombinedChart.DrawOrder.BAR, CombinedChart.DrawOrder.CANDLE });// draw bars behind candles

// right side is for the volume

YAxis rightAxis = chart.getAxisRight();

rightAxis.setDrawGridLines(false);

rightAxis.setAxisMinimum(0f);

}

@Override

public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {

chart.resetTracking();

ArrayList historicPrices = presenter.getHistoricalDataGranular(DEFAULT_GRANULARITY_MINS);

ArrayList valuesCandles = new ArrayList<>();

ArrayList valuesBars = new ArrayList<>();

for (int i = progress; (i < progress+MAX_CANDLES_COUNT) && (i < historicPrices.size()); i++) {

HistoricPrice historicPrice = historicPrices.get(i);

CandleEntry candleEntry = new CandleEntry(i, historicPrice.high.floatValue(), historicPrice.low.floatValue(), historicPrice.open.floatValue(), historicPrice.close.floatValue());

valuesCandles.add(candleEntry);

BarEntry barEntry = new BarEntry(i, Float.valueOf(historicPrice.volume.toPlainString()));

valuesBars.add(barEntry);

}

CandleDataSet set1 = new CandleDataSet(valuesCandles, "Prices");

set1.setDrawIcons(false);

set1.setAxisDependency(YAxis.AxisDependency.LEFT);

set1.setShadowColor(Color.DKGRAY);

set1.setShadowWidth(0.7f);

set1.setDecreasingColor(Color.RED);

set1.setDecreasingPaintStyle(Paint.Style.FILL);

set1.setIncreasingColor(Color.rgb(122, 242, 84));

set1.setIncreasingPaintStyle(Paint.Style.FILL);

set1.setNeutralColor(Color.BLUE);

set1.setDrawValues(true);

set1.setShowCandleBar(true);

CandleData candleData = new CandleData(set1);

BarDataSet set2 = new BarDataSet(valuesBars, "Volume");

set2.setColor(ContextCompat.getColor(this, R.color.blue_grey));

set2.setDrawValues(true);

set2.setAxisDependency(YAxis.AxisDependency.RIGHT);

BarData barData = new BarData(set2);

CombinedData data = new CombinedData();

data.setData(candleData);

data.setData(barData);

chart.setData(data);

chart.invalidate();

}