如何在条形图中启用滚动，并使xAxis标签与条形图组对齐？

Question

问题：1. x轴值不是与条形图的组映射的，为什么？

1. 我已经通过设置xAxis.axisMaximum = 50f来显示所有的条形数据，但是它在图形中显示了大量的"0“xAxis标签，所以如何解决这个问题呢？下面是代码：

populateCharts(chartData: List){ try { val prev_year = ArrayList() val current_year = ArrayList() val xAxis_label = ArrayList() var i= 0f val currentYear = Calendar.getInstance().get(Calendar.YEAR) for (item in chartData！){ xAxis_label.add(( item.brand) prev_year.add(BarEntry(i，(item.prevYear.toFloat()) current_year.add(BarEntry(i，item.currentYear.toFloat()) i++ } val prevDataSet = BarDataSet(prev_year，(Currentya-1).toString().toString().toString R.color.prev_year_bar)) val currentDataSet =BarDataSet，( currentDataSet.setColors(ContextCompat.getColor(penetration_chart.context，R.color.current_year_bar) val barData = BarData(prevDataSet，currentDataSet) penetration_chart.data = barData val xAxis = penetration_chart.getXAxis() xAxis.setPosition(XAxis.XAxisPosition.BOTTOM) xAxis.valueFormatter = IAxisValueFormatter { value，轴-> if (value.toInt()> 0& (value.toInt() < xAxis_label.size)) { xAxis_label.get(value.toInt()) }xAxis_label.size{ "0“}}xAxis.setCenterAxisLabels(真)val barSpace = 0.06f val groupSpace = 0.8f xAxis.axisMinimum = 0f xAxis.axisMaximum = 50f // val yAxisLeft = penetration_chart.axisLeft // yAxisLeft.axisMinimum = 0f // val yAxisRight = penetration_chart.axisRight // yAxisRight.axisMinimum = 0f xAxis.axisMinimumdescription.text = Description() description.text=“penetration_chart.description = description barData.setBarWidth(0.5f) penetration_chart.groupBars(0f，penetration_chart.getAxisRight().setDrawGridLines(false)；( groupSpace，barSpace)penetration_chart.getAxisLeft().setDrawGridLines(false)；penetration_chart.getXAxis().setDrawGridLines(false)；penetration_chart.setVisibleXRangeMaximum(5f) penetration_chart.invalidate() }catch (e: Exception){ e.printStackTrace() }

}

请帮帮忙。

Answer 1

这就像魅力一样，几乎没有什么变化：

private fun populateCharts(chartData: List<ResponseGetPenetrationGrowth>){
        try {

            val prev_year = ArrayList<BarEntry>()
            val current_year = ArrayList<BarEntry>()
            val xAxis_label = ArrayList<String>()
            var i = 0f
            val currentYear = Calendar.getInstance().get(Calendar.YEAR)

            xAxis_label.add("")
            for (item in chartData!!) {
                xAxis_label.add(item.brand)
                prev_year.add(BarEntry(i,item.prevYear.toFloat()))
                current_year.add(BarEntry(i,item.currentYear.toFloat()))
                i++
            }
            xAxis_label.add("")

            val prevDataSet = BarDataSet(prev_year,(currentYear-1).toString())
            prevDataSet.setColors(ContextCompat.getColor(penetration_chart.context, R.color.prev_year_bar))
            prevDataSet.valueTextSize = 8f
            val currentDataSet = BarDataSet(current_year, currentYear.toString())
            currentDataSet.valueTextSize = 8f
            currentDataSet.setColors(ContextCompat.getColor(penetration_chart.context, R.color.current_year_bar))

            val barData = BarData(prevDataSet, currentDataSet)
            penetration_chart.data = barData
            barData.setBarWidth(0.3f)
            val xAxis = penetration_chart.getXAxis()

            xAxis.setPosition(XAxis.XAxisPosition.BOTTOM)
            xAxis.valueFormatter = IndexAxisValueFormatter(xAxis_label)
            xAxis.granularity= 1f
            xAxis.setCenterAxisLabels(true)


            val barSpace = 0.05f
            val groupSpace = 0.3f
            xAxis.axisMinimum = 1f
            xAxis.axisMaximum = xAxis_label.size - 1.1f


            penetration_chart.setDrawGridBackground(false)
            val description = Description()
            description.text = ""
            penetration_chart.description = description

            penetration_chart.groupBars(1f, groupSpace, barSpace)
            penetration_chart.getAxisRight().setDrawGridLines(false);
            penetration_chart.getAxisLeft().setDrawGridLines(false);
            penetration_chart.getXAxis().setDrawGridLines(false);

            val legend = penetration_chart.legend
            legend.position = Legend.LegendPosition.BELOW_CHART_CENTER
            penetration_chart.extraBottomOffset = 20f
            penetration_chart.setVisibleXRangeMaximum(5f)
            penetration_chart.invalidate()

        }catch (e: Exception){
            e.printStackTrace()
        }
    }