我在我的项目中使用了MP图表。我正在使用多个数据集的柱状图。我遇到了以下问题：
- 我想要在图例和x轴之间提供一些空间。现在它与轴粘在一起。我查阅了文档，但找不到设置轴和图例之间边距的方法。(如下所示截图 - 标记为问题1)
- 图表在开头显示了一个空组，我想要删除它。(如下所示截图 - 标记为问题2)
以下是我的代码:
tco_chart?.description?.isEnabled = false
tco_chart?.setPinchZoom(false)
tco_chart?.setDrawBarShadow(false)
val leftYAxis = tco_chart?.axisLeft
leftYAxis?.setDrawGridLines(false)
leftYAxis?.axisMinimum = 0f
tco_chart?.setDrawGridBackground(false)
val mv = MyMarkerView(this, R.layout.custom_marker_view)
mv.setChartView(tco_chart) // For bounds control
tco_chart.setMarker(mv)
val legend = tco_chart?.legend
legend?.setVerticalAlignment(Legend.LegendVerticalAlignment.BOTTOM)
legend?.setHorizontalAlignment(Legend.LegendHorizontalAlignment.LEFT)
legend?.setOrientation(Legend.LegendOrientation.HORIZONTAL)
legend?.setYOffset(0f)
legend?.setXOffset(10f)
legend?.setYEntrySpace(0f)
legend?.setTextSize(5f)
val axisLabels = ArrayList<String>()
axisLabels.add("Year 1")
axisLabels.add("Year 2")
axisLabels.add("Year 3")
axisLabels.add("Year 4")
axisLabels.add("Year 5")
val xAxis = tco_chart?.xAxis
xAxis?.granularity = 1f
xAxis?.position = XAxis.XAxisPosition.BOTTOM
xAxis?.setCenterAxisLabels(true)
xAxis?.setDrawLabels(true)
xAxis?.valueFormatter = IndexAxisValueFormatter(axisLabels)
val insuranceCostEntry = ArrayList<BarEntry>()
val insuranceCostDataModel = tcoResultModel.insurance_cost
if (insuranceCostDataModel != null) {
insuranceCostEntry.add(BarEntry(0f, insuranceCostDataModel.first_year.toFloat()))
insuranceCostEntry.add(BarEntry(1f, insuranceCostDataModel.second_year.toFloat()))
insuranceCostEntry.add(BarEntry(2f, insuranceCostDataModel.third_year.toFloat()))
insuranceCostEntry.add(BarEntry(3f, insuranceCostDataModel.fourth_year.toFloat()))
insuranceCostEntry.add(BarEntry(4f, insuranceCostDataModel.fifth_year.toFloat()))
}
val fuelCostEntry = ArrayList<BarEntry>()
val fuelCostDataModel = tcoResultModel.fuel_cost
if (fuelCostDataModel != null) {
fuelCostEntry.add(BarEntry(0f, fuelCostDataModel.first_year.toFloat()))
fuelCostEntry.add(BarEntry(1f, fuelCostDataModel.second_year.toFloat()))
fuelCostEntry.add(BarEntry(2f, fuelCostDataModel.third_year.toFloat()))
fuelCostEntry.add(BarEntry(3f, fuelCostDataModel.fourth_year.toFloat()))
fuelCostEntry.add(BarEntry(4f, fuelCostDataModel.fifth_year.toFloat()))
}
val serviceCostEntry = ArrayList<BarEntry>()
val serviceCostDataModel = tcoResultModel.service_cost
if (serviceCostDataModel != null) {
serviceCostEntry.add(BarEntry(0f, serviceCostDataModel.first_year.toFloat()))
serviceCostEntry.add(BarEntry(1f, serviceCostDataModel.second_year.toFloat()))
serviceCostEntry.add(BarEntry(2f, serviceCostDataModel.third_year.toFloat()))
serviceCostEntry.add(BarEntry(3f, serviceCostDataModel.fourth_year.toFloat()))
serviceCostEntry.add(BarEntry(4f, serviceCostDataModel.fifth_year.toFloat()))
}
val tyreChangeCostEntry = ArrayList<BarEntry>()
val tyreChangeCostDataModel = tcoResultModel.tyre_change_cost
if (tyreChangeCostDataModel != null) {
tyreChangeCostEntry.add(BarEntry(0f, tyreChangeCostDataModel.first_year.toFloat()))
tyreChangeCostEntry.add(BarEntry(1f, tyreChangeCostDataModel.second_year.toFloat()))
tyreChangeCostEntry.add(BarEntry(2f, tyreChangeCostDataModel.third_year.toFloat()))
tyreChangeCostEntry.add(BarEntry(3f, tyreChangeCostDataModel.fourth_year.toFloat()))
tyreChangeCostEntry.add(BarEntry(4f, tyreChangeCostDataModel.fifth_year.toFloat()))
}
val depreciationCostEntry = ArrayList<BarEntry>()
val depriciationCostDataModel = tcoResultModel.depreciation_cost
if (depriciationCostDataModel != null) {
depreciationCostEntry.add(BarEntry(0f, depriciationCostDataModel.first_year.toFloat()))
depreciationCostEntry.add(BarEntry(1f, depriciationCostDataModel.second_year.toFloat()))
depreciationCostEntry.add(BarEntry(2f, depriciationCostDataModel.third_year.toFloat()))
depreciationCostEntry.add(BarEntry(3f, depriciationCostDataModel.fourth_year.toFloat()))
depreciationCostEntry.add(BarEntry(4f, depriciationCostDataModel.fifth_year.toFloat()))
}
val year1Set: BarDataSet
val year2Set: BarDataSet
val year3Set: BarDataSet
val year4Set: BarDataSet
val year5Set: BarDataSet
var data = tco_chart?.data
if (data != null) {
if (data.dataSetCount > 0) {
year1Set = data.getDataSetByIndex(0) as BarDataSet
year1Set.values = insuranceCostEntry
year2Set = data.getDataSetByIndex(1) as BarDataSet
year2Set.values = fuelCostEntry
year3Set = data.getDataSetByIndex(2) as BarDataSet
year3Set.values = tyreChangeCostEntry
year4Set = data.getDataSetByIndex(3) as BarDataSet
year4Set.values = serviceCostEntry
year5Set = data.getDataSetByIndex(4) as BarDataSet
year5Set.values = depreciationCostEntry
data.notifyDataChanged()
tco_chart?.notifyDataSetChanged()
}
} else {
year1Set = BarDataSet(insuranceCostEntry, "Insurance Cost")
year1Set.color = Color.rgb(232, 128, 44)
year2Set = BarDataSet(fuelCostEntry, "Fuel Cost")
year2Set.color = Color.rgb(232, 199, 44)
year3Set = BarDataSet(tyreChangeCostEntry, "Tyre Change Cost")
year3Set.color = Color.rgb(10, 149, 221)
year4Set = BarDataSet(serviceCostEntry, "Service Cost")
year4Set.color = Color.rgb(47, 194, 144)
year5Set = BarDataSet(depreciationCostEntry, "Depriciation Cost")
year5Set.color = Color.rgb(105, 123, 192)
data = BarData(year1Set, year2Set, year3Set, year4Set, year5Set)
data.setValueFormatter(IndexAxisValueFormatter())
tco_chart?.data = data
}
val rightYAxis = tco_chart?.axisRight
rightYAxis?.isEnabled = false
tco_chart?.getBarData()?.setBarWidth(0.1f)
tco_chart?.xAxis?.axisMaximum = (0 + data.getGroupWidth(0.4f, 0.02f) * 5)
tco_chart?.groupBars(0f, 0.4f, 0.02f)
tco_chart?.invalidate()